Answer:
B!
Step-by-step explanation:
I took the test and this was correct :)
What is the difference between a discrete
probability distribution and a continuous
probability distribution?
Give your own example of each. What is the
expected value, and what does it measure?
How is it computed for a discrete probability
distribution?
A discrete probability distribution is a statistical distribution that relates to a set of outcomes that can take on a countable number of values, whereas a continuous probability distribution is one that can take on any value within a given range.Therefore, the main difference between the two types of distributions is the type of outcomes that they apply to.
An example of a discrete probability distribution is the probability of getting a particular number when a dice is rolled. The possible outcomes are only the numbers one through six, and each outcome has an equal probability of 1/6. Another example is the probability of getting a certain number of heads when a coin is flipped several times.
On the other hand, an example of a continuous probability distribution is the distribution of heights of students in a school. Here, the range of heights is continuous, and it can take on any value within a given range.
The expected value of a probability distribution measures the central tendency or average of the distribution. In other words, it is the long-term average of the outcome that would be observed if the experiment was repeated many times.
For a discrete probability distribution, the expected value is computed by multiplying each outcome by its probability and then adding the results. In mathematical terms, this can be written as E(x) = Σ(xP(x)), where E(x) is the expected value, x is the possible outcome, and P(x) is the probability of that outcome.
For example, consider the probability distribution of the number of heads when a coin is flipped three times. The possible outcomes are 0, 1, 2, and 3 heads, with probabilities of 1/8, 3/8, 3/8, and 1/8, respectively. The expected value can be computed as E(x) = (0*1/8) + (1*3/8) + (2*3/8) + (3*1/8) = 1.5.
Therefore, the expected value of the distribution is 1.5, which means that if the experiment of flipping a coin three times is repeated many times, the long-term average number of heads observed will be 1.5.
Execute an appropriate follow-up test to determine on which days of the week the mean delivery time is different. what is your conclusion? [save the script to the data file]
To determine on which days of the week the mean delivery time is different, we can conduct a statistical test such as Analysis of Variance (ANOVA) followed by post-hoc tests. ANOVA will help us determine if there are any significant differences in mean delivery time across different days of the week, and post-hoc tests will identify specific pairwise differences between the days.
Here's an example script using Python and the SciPy library to perform the ANOVA and Tukey's HSD post-hoc test:
python
import pandas as pd
from scipy.stats import f_oneway
from statsmodels.stats.multicomp import pairwise_tukeyhsd
# Load the data from the file (assuming it's in CSV format)
data = pd.read_csv('delivery_times.csv')
# Perform one-way ANOVA
f_statistic, p_value = f_oneway(data['Monday'], data['Tuesday'], data['Wednesday'], data['Thursday'], data['Friday'])
# Check if there are significant differences
if p_value < 0.05:
print("The mean delivery times are significantly different across at least one day of the week.")
else:
print("There is no significant difference in mean delivery times across different days of the week.")
# Perform Tukey's HSD post-hoc test
posthoc = pairwise_tukeyhsd(data[['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday']].values.flatten(), data['Day'].values.flatten())
# Save the results to a file
results_df = pd.DataFrame(data=posthoc._results_table.data[1:], columns=posthoc._results_table.data[0])
results_df.to_csv('posthoc_results.csv', index=False)
Make sure to replace 'delivery_times.csv' with the actual filename/path for your data file containing the delivery times. The data file should have columns for each day of the week (e.g., Monday, Tuesday, Wednesday) and a column indicating the corresponding day.
After running the script, it will print whether there is a significant difference in mean delivery times across different days of the week. Additionally, it will save the results of the Tukey's HSD post-hoc test to a CSV file named 'posthoc_results.csv'. The post-hoc results will indicate which pairwise comparisons are significantly different and provide additional statistical information.
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Question 4 13 points)
COMPARING METHODS
Solve the triangle with the given information. Round decimal answers to the nearest tenth:
m ZB = 98°
m ZC = 37°
a = 18
The solutions to the triangle are given as follows:
m < A = 45º.b = 25.2.c = 15.3. What is the law of sines?We consider a triangle with side lengths and angles related as follows:
Side length of a is opposite to angle A.Side length of b is opposite to angle B.Side length of c is opposite to angle C.Then the lengths and the sines of the angles are related as follows:
sin(A)/a = sin(B)/b = sin(C)/c.
The sum of the measures of the internal angles of a triangle is of 180º, hence the measure of angle A is given as follows:
m < A + 98 + 37 = 180
m < A = 180 - 135
m < A = 45º.
Hence the relations from the law of sines are given as follows:
sin(45º)/18 = sin(98º)/b = sin(37º)/c.
Hence the length b is given as follows:
sin(45º)/18 = sin(98º)/b
b = 18 x sine of 98 degrees/sine of 45 degrees
b = 25.2.
The length c is given as follows:
sin(45º)/18 = sin(37º)/c.
c = 18 x sine of 37 degrees/sine of 45 degrees
c = 15.3.
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Can Someone help me find what’s half of 3 because I get that the whole line is 3 and you need to find what QJ is which is half but wouldn’t you need to divide it by Two to find it but you can’t divide 3
What is the side length of a regular 36-gon that
has an area of 164,592 m2
and an apothem of
228.6 m?
To find the side length of a regular 36-gon with an apothem of 228.6 m, we need to use the formula:
Side length = 2 x apothem x tan(180/n)
where n is the number of sides in the polygon. Substituting the given values, we get:
Side length = 2 x 228.6 m x tan(180/36)
Side length = 2 x 228.6 m x tan(5)
Side length = 2 x 228.6 m x 0.0875
Side length = 40 m
Therefore, the side length of the regular 36-gon is 40 meters. The apothem is the distance from the center of the polygon to the midpoint of a side, and by using the formula above, we were able to calculate the length of one side of the polygon.
To find the side length of a regular 36-gon with an apothem of 228.6 meters, we'll use trigonometry. In a regular polygon, the apothem serves as the radius of the inscribed circle and forms a right triangle with half of the side length and the center of the polygon.
Step 1: Divide the 36-gon into 36 equal triangles.
Step 2: Find the central angle of each triangle: 360°/36 = 10°.
Step 3: Calculate half the central angle: 10°/2 = 5°.
Step 4: Use the tangent function for the right triangle: tan(5°) = (side length/2) / 228.6.
Step 5: Solve for the side length: side length = 2 * 228.6 * tan(5°) ≈ 39.7 meters.
The side length of the regular 36-gon is approximately 39.7 meters.
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someone needs to write a 12-page paper for class. He decides that he will write 3 pages each day. How many days will it take him?
Answer:
4 whole days
Step-by-step explanation:
If he wrote 3 pages each day and he has to write 12 pages then it would take him 4 days.
if the length of a rectangle is six feet more than the width and the area is 112 square feet find the width of the rectangle
a. 14
b. 56
c. 4
d. 8
Answer: 8 feet
Step-by-step explanation:
length= 6+w
A=112
8*14=112, meaning that the width is either 8 or 14. because the length is 6+ than the width, that makes the length bigger. 14 is bigger than 8. The width is 8
I have tried 3 times to solve this.
Step-by-step explanation:
Year 2006- y = 0.09 (6) + 0.04 = 0.58
Year 2008- y = 0.09 (8) + 0.04 = 0.76
Year 2010- y = 0.09 (10) + 0.04 = 0.94
Year 2012- y = 0.09 (12) + 0.04 = 1.12
Year 2014- y = 0.09 (14) + 0.04 = 1.3
"Let x = 6 which is corresponded to 2006", so 8 would correspond to 2008, 10 would correspond to 2010, 12 would correspond to 2012, and 14 would correspond to 14. Plug 6 for x into your equation and do them same for the others.
Hopefully this helps you! :)
The functions f(x) = 2x and g(x) = 2â€"x 3 are combined using division to get function h(x). which represents the combined function? h(x) = 22x 3, x ≥ 0 h(x) = 22x â€" 3, x ≥ 0 h(x) = 22x 3, all real numbers h(x) = 22x â€" 3, all real numbers
The domain of each of these combinations is the intersection of the domain of f and the domain of g.The combined function is
h(x) = (2x) / (2 - \(x^3\)), where x ≥ 0.
The topic with functions that we need to deal with is combining functions. For the most part this means performing basic arithmetic (addition, subtraction, multiplication, and division) with functions.
Sum
(f + g)(x) = f(x) + g(x)
Difference
(f - g)(x) = f(x) - g(x)
Product
(f · g)(x) = f(x) · g(x)
Quotient
(f / g)(x) = f(x) / g(x), as long as g(x) isn't zero.
There is one new way of combining functions that we’ll need to look at as well.
To combine,
the functions f(x) = 2x and g(x) = 2 - x^3
using division
We get the function h(x), we divide f(x) by g(x).
h(x) = f(x) / g(x) = (2x) / (2 - x^3)
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0.2) Show that the lines x+1=3t,y=1,z+5=2t for t∈R and x+2=s,y−3=−5s, z+4=−2s for t∈R intersect, and find the point of intersection.
To show that the lines given by the parametric equations x+1=3t, y=1, z+5=2t and x+2=s, y-3=-5s, z+4=-2s intersect, we need to find the values of t and s for which the equations are satisfied.
Comparing the x-component of the parametric equations, we have:
x + 1 = 3t ...(1)
x + 2 = s ...(2)
Setting the two equations equal to each other, we get:
3t = s - 1 ...(3)
Comparing the y-component of the parametric equations, we have:
y = 1 ...(4)
y - 3 = -5s ...(5)
Setting the two equations equal to each other, we get:
1 - 3 = -5s
-2 = -5s
s = 2/5 ...(6)
Substituting the value of s into equation (3), we can solve for t:
3t = (2/5) - 1
3t = -3/5
t = -1/5 ...(7)
Now that we have the values of t and s, we can substitute them back into the parametric equations to find the point of intersection. Plugging t = -1/5 into equation (1), we get:
x = -1/5 + 1
x = 4/5
Plugging s = 2/5 into equation (2), we get:
x = 2/5 + 2
x = 12/5
Since both equations (1) and (2) give the same value of x, we can conclude that the lines intersect at the point (12/5, 1, -2/5).
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I am not good at flowcharts and it's hard for me to get them correct. If someone is willing to help me that would be awesome!
• The have 1 equal sides.
• They have 3 sides.
• They have 3 vertex.
|
• GFE = UTS
|
• because they're the same triangle just opposite.
30 points!!!! a class of 30 students the Ratio of the numbers of boys to girls 7:8
How many girls are there in the class?
Answer:
16 girls in the class
14 boys in the class
Step-by-step explanation:
Because of the ratio of 7:8, I added 7+8.
7+8= 15
30 (the number of students in the class) divided by 15 (the sum of the ratio)
30/15= 2
I then multiplied 8 from the "girls" part of the ratio by 2 (the quotient of 30/15) and got 16. Then I subtracted 16 from 30 and got 14, which s the number of boys in the class.
Hope this helps!
You need to build a model that predicts the volume of sales (Y) as a function of advertising (X). You believe that sales increase as advertising increase, but at a decreasing rate. Which of the following would be the general form of such model? (note: X^2 means X Square)
A. Y ^ = b0 + b1 X1 + b2 X2^2
B. Y ^ = b0 + b1 X + b2 X / X^2
C. Y ^ = b0 + b1 X + b2 X^2
D. Y ^ = b0 + b1 X
E. Y ^ = b0 + b1 X1 + b2 X2
The general form of such a model that predicts the volume of sales (Y) as a function of advertising (X) in which sales increase as advertising increases, but at a decreasing rate is given by Y^ = b0 + b1X + b2X². Option C.
The general form of the model that fits the description of the sales model that is given in the problem is C. Y^ = b0 + b1X + b2X². Where Y^ represents the predicted or estimated value of Y. b0, b1, and b2 are the coefficients of the model, and they represent the intercept, the slope, and the curvature of the relationship between X and Y, respectively.
In this model, the variable X has a quadratic relationship with the variable Y because of the presence of the squared term X². This indicates that the effect of X on Y is not linear but curvilinear, which means that the effect of X on Y changes as X increases. Specifically, the effect of X on Y increases initially but then levels off or diminishes as X becomes larger. Answer option C.
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an angle measures 15.8° less than the measure of its supplementary angle. what is the measure of each angle?
Answer:
Step-by-step explanation:
The angle and its supplementary angle have a difference of 15.8°. To find the measures, we need to solve an equation.
Let's assume the measure of the angle is x°. The measure of its supplementary angle would be (180° - x°). According to the given information, x° = (180° - x°) - 15.8°.
Simplifying the equation, we have:
x° = 180° - x° - 15.8°
2x° = 164.2°
x° = 82.1°
Therefore, the angle measures 82.1° and its supplementary angle measures (180° - 82.1°) = 97.9°. The difference between these angles is indeed 15.8°, as stated in the problem.
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Simplify each expression and eliminate negative exponents
x^5 multiply x^8
(2x^3)^2
x^-3 • x ^5
Y^6 • y^9
(3x)^3
Y^7• y^-3
Z^-8 • z ^3
x^-2 x ^-6 x^4
X^15 by x^10
Here are the simplified expressions for each equation:
(x⁵) * (x⁸) * (2x³)² * (x⁻³) * (x⁵) = (x⁵) * (x⁸) * (2x⁶) * (x⁻³) * (x⁵) =
2x⁽⁵⁺⁸⁺⁶⁻³⁺⁵⁾ = 2x²¹
(y⁶) * (y⁹) = y⁽⁶⁺⁹⁾ = y¹⁵
(3x)³ = 27x³
(y⁷) * (y⁻³) = y⁽⁷⁻³⁾= y⁴
(z⁻⁸) * (z³) = z⁽⁻⁸⁺³⁾ = z⁻⁵
(x⁻²) * (x^⁻⁶) * (x⁴) = x⁽⁻²⁻⁶⁺⁴⁾ = x⁻⁴
(x¹⁵) * (x¹⁰) = x⁽¹⁵⁺¹⁰⁾ = x²⁵
What is expression?An expression or mathematical expression is a finite collection of symbols that is well-formed according to context-dependent norms. In mathematics, an expression is a phrase that has at least two numbers or variables and at least one arithmetic operation. Addition, subtraction, multiplication, or division are all examples of math operations. Term is defined as a constant, a single variable, or a combination of a variable and a constant multiplied or divided. An expression in mathematics is a collection of numbers, variables, and functions (such as addition, subtraction, multiplication or division etc.)
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the simplified expressions for each equation is:
a) 2x²¹ b) y¹⁵
c) 27x³ d) y⁴
e) z⁻⁵ f) x⁻⁴
g) x²⁵
What is expression?An expression or mathematical expression is a finite collection of symbols that is well-formed according to context-dependent norms. In mathematics, an expression is a phrase that has at least two numbers or variables and at least one arithmetic operation.
Addition, subtraction, multiplication, or division are all examples of math operations. Term is defined as a constant, a single variable, or a combination of a variable and a constant multiplied or divided.
An expression in mathematics is a collection of numbers, variables, and functions (such as addition, subtraction, multiplication or division etc.)
Here are the simplified expressions for each equation:
(x⁵) * (x⁸) * (2x³)² * (x⁻³) * (x⁵) = (x⁵) * (x⁸) * (2x⁶) * (x⁻³) * (x⁵) =
2x⁽⁵⁺⁸⁺⁶⁻³⁺⁵⁾ = 2x²¹
(y⁶) * (y⁹) = y⁽⁶⁺⁹⁾ = y¹⁵
(3x)³ = 27x³
(y⁷) * (y⁻³) = y⁽⁷⁻³⁾= y⁴
(z⁻⁸) * (z³) = z⁽⁻⁸⁺³⁾ = z⁻⁵
(x⁻²) * (x^⁻⁶) * (x⁴) = x⁽⁻²⁻⁶⁺⁴⁾ = x⁻⁴
(x¹⁵) * (x¹⁰) = x⁽¹⁵⁺¹⁰⁾ = x²⁵
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Compare the budgets of Hong Kong, United States of America, and
Korea based on your definition of a budget, in terms of contents,
formats, advantages, and disadvantages, etc.
The budgets of Hong Kong, the United States of America, and Korea differ in contents, formats, advantages, and disadvantages. While each budget has its strengths and weaknesses, they all aim to provide a clear and transparent financial plan for their respective countries.
A budget is a financial plan that estimates expected income and expenditure for a specific period. It may include income, expenses, debts, and savings. Budgets may vary from country to country and can be analyzed by comparing their contents, formats, advantages, and disadvantages. Here are the budgets of Hong Kong, the United States of America, and Korea:
Hong Kong Budget:United States Budget:
Contents: The US budget comprises revenue, expenditures, and deficit or surplus. It includes an analysis of taxes, social security, and Medicare.Format: The US budget is presented in a complex and lengthy format, including tables, graphs, and other financial documents.Advantages: The budget provides detailed information on tax expenditures and encourages public participation in the budget process.Disadvantages: The budget can be challenging to understand due to its complexity, and it may not provide an accurate depiction of federal spending.Korean Budget:
Contents: The Korean budget comprises revenue, expenditures, and surplus or deficit. It includes detailed information on taxes, social security, and public welfare.Format: The Korean budget is presented in a clear and concise format, including tables and charts to aid understanding.Advantages: The budget is easy to understand, and it promotes transparency and accountability. It also provides detailed information on social welfare expenditures.Disadvantages: The budget may not provide an accurate depiction of government spending, and it may not include information on hidden expenditures.Learn more about Budget:
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What is the volume of the prism shown?
A) 149.9 cubic inches
B) 268.2 cubic inches
C) 173.9 cubic inches
D) 291.8 cubic inches
Answer:
145.9 cubic inches
Step-by-step explanation:
The volume of a triangular prism is:
1/2 x length x width x height
Use the formula with the given dimensions:
1/2 x 5.27 x 8.13 x 6.81 = 145.8875655
Round it up to the nearest tenths:
145.8875655 —> 145.9
I hope this helps!
Answer:
145.9 cubic inches
Step-by-step explanation:
Find the perimeter of each polygon created by the coordinates.
A(-2, 3), B(3, 1), C(-2, -1), D(-3, 1)
a) 16.7
b) 14
c) 15.2
3. If $1100 is invested at an interest rate, r, compounded annually, the amount in the account after 4 years is given by the polynomial function A (r) = 1100 (1 + r)4. Graph this function in an appropriate window. Describe how this function is transformed from the graph of f(r) = rª. At what interest rate would the money need to be invested in order to yield $2281 after 4 years? Show how this answer is represented on the graph of y = A(r). Verify this result by solving for this value algebraically.
An interest rate of approximately 8.09% compounded annually would yield $2281 after 4 years with an initial investment of $1100.
How to explain the functionThe function A(r) = 1100(1+r)^4 represents the amount in the account after 4 years with an initial investment of $1100 and an annual interest rate of r compounded annually.
It should be noted that to describe how this function is transformed from the graph of f(r) = r^a, we can compare the exponents in the two functions. The exponent in A(r) is 4, while the exponent in f(r) is a. The effect of changing the exponent from a to 4 is to increase the growth rate of the function. As the exponent increases, the function grows more quickly. In this case, raising the interest rate to the fourth power leads to a more significant growth in the account balance over time.
In this case, to find the interest rate that would yield $2281 after 4 years, we can set A(r) equal to 2281 and solve for r:
2281 = 1100(1+r)⁴
(1+r)^4 = 2281/1100
1+r = (2281/1100)^(1/4)
r = (2281/1100)^(1/4) - 1
r ≈ 0.0809
Therefore, an interest rate of approximately 8.09% compounded annually would yield $2281 after 4 years with an initial investment of $1100.
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When two six-sided dice are rolled, there are 36 possible outcomes.
Find the probability that the sum is not 4.
Find the probability that the sum is greater than 5.
Answer:
33/36 ; 26/36
Step-by-step explanation:
A) To find the probability that the sum is not four, let's discover how many sums do equal four.
1+3=43+1=42+2=4There are three possibilities that the sum is four. So:
36-3=33 possibilities where the sum is not four. Or, \(\frac{33}{36}\) in probability terms.
B) Similarly, lets find out how many possibilities would be greater than five. However, to make it quicker, let's do the opposite, and then subtract. We already know how many equal four. Now: how many possibilities result in a sum of 2, 3, or 5?
1+1=21+2=32+1=31+4=54+1=52+3=53+2=5Including the sums of four we found earlier, this leaves 10 possible outcomes where the sum is less than or equal to five. Or, in other words, 26 possible outcomes where the sum is greater than five.
\(\frac{26}{36}\), in probability terms.
Casey buys a bracelet. She pays for the bracelet and pays $0.72 in sales tax. The sales tax rate is %6, percent.
What is the original price of the bracelet, before tax?
The original price of the bracelet, before tax $0.68
What is the original price of the bracelet, before tax?From the question, we have the following parameters that can be used in our computation:
Amount = $0.72
Sales tax = 6%
Using the above as a guide, we have the following:
Amount = Original amount * (1 + Sales tax)
Substitute the known values in the above equation, so, we have the following representation
0.72 = Original amount * (1.06)
So, we have
Original amount = 0.68
Hence, the original amount = 0.68
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The tables represent the points earned in each game for a season by two football teams.
Eagles
3 24 14
27 10 13
10 21 24
17 27 7
40 37 55
Falcons
24 24 10
7 30 28
21 6 17
16 35 30
28 24 14
Which team had the best overall record for the season? Determine the best measure of center to compare, and explain your answer.
Eagles; they have a larger median value of 21 points
Falcons; they have a larger median value of 24 points
Eagles; they have a larger mean value of about 22 points
Falcons; they have a larger mean value of about 20.9 points
Falcons had a more effective overall record because of the higher median. Thus, the answer is option B.
The median is usually used for the comparison of two data sets instead of the mean, as it is not affected by outliers.
Compare the total points earned by each team.
The Eagles data set is given below:
3, 7, 10, 10, 13, 14, 17, 21, 24, 24, 27, 27, 37, 40, 55.
As the data set has an odd cardinality, the median is the middle element, therefore it is for:
21.
For the Falcons, we use the same approach and obtain a median about:
24.
Therefore, we can say that the Falcons had a more effective overall record because of the higher median and the best measure of center to compare would be mean.
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A rectangle is 3/4 of a feet long and 5/12 of a feet wide. What fraction represents the area of the rectangle
The area of the rectangle can be expressed as a fraction by multiplying 3/4 and 5/12. The answer is 5/16, which represents the area of the rectangle.
1. Multiply the length and width of the rectangle: 3/4 x 5/12 = 15/48
2. Reduce the fraction to its simplest form: 15/48 = 5/16
3. The answer is 5/16, which represents the area of the rectangle.
To find the area of a rectangle, you need to multiply the length and width of the rectangle together. In this case, the rectangle is 3/4 of a foot long and 5/12 of a foot wide. To express the area as a fraction, you need to multiply the two fractions together. 3/4 x 5/12 = 15/48. Since 15 and 48 have a common factor of 3, the fraction can be reduced to its simplest form, 5/16. Therefore, the area of the rectangle can be expressed as 5/16. This fraction represents the area of the rectangle.
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The complete question is
A rectangle is 3/4 of a feet long and 5/12 of a feet wide. What fraction represents the area of the rectangle of a feet wide.
the sum of a set of numbers is 48 and the average is 6. how many numbers are in this group.
Answer:
it's simple that is 48/6 = 8 and 6×8=48 do you get it now
The annual salary for a computer technician at Company A varies from $41,000 to $63,000 with a men’s of $58,000. At Company B, the annual salary for the same position varies from $45,000 to $62,000, with a mean of $56,000. Which statement is TRUE when comparing the salaries of computer technicians for the two companies?
Answer:
i forgot what i was going to put
The students in Juan's class got to choose between pizza and burgers for the celebration on the last day of school. 25% of the students picked the pizza. If there are 16 students in all at Juan's class, how many students preferred the pizza?
Answer:
4 studentsStep-by-step explanation:
Step one:
given
we are told that the total number of students is =16
so 25% of these students preferred pizza
Firstly, we want to know what 25% of 16 will be
so
=25/100*16
=0.25*16
=4
This means that only 4 students preferred pizza
two step equations
find the value of the unknown variable in the equation
3b+4= - 31
pls help. even if it’s just one question
Answer:
a, (5;1) R = \(\sqrt{7}\)
b, (-2; 4) R = \(2\sqrt{2}\)
c, (4;7) R = 7
d, (-3; -6) R = 7
Step-by-step explanation:
Divide.
1.156÷106
whoever helps me first gets brainlest
Answer: 0.01090566037
Answer: The short answer to this is 0.0109
I WILL GIVE BRAINLEST
graph an ordered pair that is a solution
to the inequality.
4x + 3y <12
Step-by-step explanation:
( 0,-4) that the answer