A textbook store sold a combined total of 414 physics an chemistry textbooks in a week. The number of physics textbooks sold was 60 more than the number of chemistry textbooks sold. How many textbooks of each type were sold?
Answers
Answer:
chemistry textbooks:177
physics textbooks:237
Step-by-step explanation:
414-60=354
354/2=177
177+60=237
Related Questions
When you are trying to discover whether there is a relationship between two categorical variables, why is it useful to transform the counts in a crosstabs to percentages of row or column totals
Answers
When analyzing categorical data, it is often useful to examine the relationship between two variables. Crosstabs, or contingency tables, are commonly used to display the counts of observations in each combination of the two variables. However, these raw counts can be difficult to interpret, especially if the totals for each variable are different.
By transforming the counts into percentages of row or column totals, we can better understand the patterns and relationships in the data. Percentages allow us to compare the proportions of one variable within each category of the other variable, regardless of the total number of observations. This can help us identify any trends or patterns in the data that may not be immediately apparent from the raw counts.
For example, suppose we have a crosstab of gender and favorite color. The raw counts may show that more females than males prefer blue, but it's difficult to know if this difference is meaningful without knowing the total number of males and females in the sample. By transforming the counts to percentages of row totals, we can see that 40% of females prefer blue, while only 30% of males do. This suggests that there may be a relationship between gender and favorite color.
Overall, transforming raw counts into percentages of row or column totals can help us better understand the relationship between two categorical variables, especially when the totals are different.
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Brainlist will be given if you get this correct!!!
Answers
Answer:
It's the second one
Step-by-step explanation:
It's the second one because 75 dollars is only being charged once and 25 dollars is being charged x amount of hours so you would make the equation
y = 25x + 75
Can I have brainliest? It would help me out, if not thanks anyways! Hope this helped and have a nice day!
Use each of the digits 2,4,6 and 7 to make this calculation correct ?.?+?.?=10
Answers
Answer:
2.6+7.4 or 2.4+7.6
Step-by-step explanation:
Both of the above equals to 10!
The two-way frequency table contains data on the preference of two colors among a group of males and females.
Pink Blue Total
Male 9 21 30
Female 21 49 70
Total 30 70 100
Based on this data, are "Female" and "Blue" independent events?
A) No, P(Female ∩ Blue) ≠ P(Female) ⋅ P(Blue)
B) No, P(Female ∩ Blue) = P(Female) ⋅ P(Blue)
C) Yes, P(Female ∩ Blue) ≠ P(Female) ⋅ P(Blue)
D) Yes, P(Female ∩ Blue) = P(Female) ⋅ P(Blue)
Answers
The correct statement regarding whether female and blue are independent events is given as follows:
D) Yes, P(Female ∩ Blue) = P(Female) ⋅ P(Blue)
What are independent events?Two events, A and B are independent, if, and only if, the probability of both events is equals to the multiplication of the probabilities of each event.
\(P(A \cap B) = P(A)P(B)\)
From the table, the probabilities are given as follows:
P(Female) = 70/100 = 0.7.P(Blue) = 70/100 = 0.7.P(Female and Blue) = 49/100 = 0.49.The multiplication of these probabilities is of:
0.7 x 0.7 = 0.49 = P(Female and Blue).
Hence the events are independent.
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Quadrilateral ABCD is inscribed in a circle. If angle B measures 24°, what is the measure of angle D?
Answers
Answer: 156!
Step-by-step explanation: i’m not going to lie, i guessed but, i ended up getting it right .
PLS HELP ME PLS PLS
How has the suburban environment changed shopping?
A. Specialty shops that offer high-quality goods have been created to address one specific
need.
B. To consolidate space, shops often are located on the bottom floor of large buildings, with
the upper floors used as office or residential space.
C. Strip malls, big-box retail stores, malls, and drive-throughs have been developed to
accommodate shoppers driving automobiles.
D. Outdoor shopping spaces located in pedestrian zones have been developed to cater to
shoppers walking or biking.
Answers
Answer:
I think the answer is A. Specialty shops that offer high-quality goods have been created to address one specific need
AN Calculators can be purchased for the upcoming end-of-course exam. The revenue function can be modeled as RAN (3) = (25 10x) (300 - 36x) where x is the price of the calculator. MN Calculators can also be purchased for the upcoming exam. The revenue function can be modeled as RuN (x) = (100 20x) (100 - 12x) where x is the price of the calculator. Determine the price of each calculator where the revenue of AN Calculators and MN Calculators are the same.
Answers
The revenue functions of the calculator companies is the difference between their cost and profit functions
The price of each calculator when the revenues of AN Calculators and MN Calculators are the same is $2.5
How to determine when the prices are the sameThe revenue functions are given as:
RAN (x) = (25 + 10x) (300 - 36x)
RMN (x) = (100+ 20x) (100 - 12x)
When the prices are the same, we have:
RAN (x) = RMN (x)
So, we have:
\((25 + 10x) (300 - 36x) = (100+ 20x) (100 - 12x)\)
Divide through by 20
\((5 + 2x) (75 - 9x) = (10+ 2x) (50 - 6x)\)
Using a graphing calculator, we have the following value of x
x = 2.5
Hence, the price of each calculator when the revenues of AN Calculators and MN Calculators are the same is $2.5
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Mr. Red's first year salary is $30,000 and it increases by $500 each year. What is the explicit rule for this sequence in simplified form?
Question 1 options:
an=29,500(n)+500
an=500(n)+29,999
an=500(n)+29,500
an=500(n)+30,000
Answers
Mr. Red's salary is an illustration of an arithmetic sequence
The explicit rule of Mr. Red's salary is an = 500n + 29500
How to determine the explicit formula?Mr. Red's salary is an arithmetic sequence with the following parameters:
First term, a1 = 30000
Common difference, d = 500
The explicit rule is calculated as:
an = a1 + (n - 1) * d
This gives
an = 30000 + (n - 1) * 500
Evaluate the product
an = 30000 - 500 + 500n
This gives
an = 29500 + 500n
Rewrite as:
an = 500n + 29500
Hence, the explicit rule of Mr. Red's salary is an = 500n + 29500
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SOMEONE PLEASE HURRY AND HELP ME WITH THIS FOR A P E X
Answers
Answer: A
Step-by-step explanation:
8,4 cause they in there intersect there
Find the lower bound for the following lengths:
a) 40 cm measured to the nearest cm.
b) 82.8 cm measured to the nearest tenth of a cm.
Answers
Answer:
a) Lower bound = 39.5
b) Lower bound = 82.75
Three hikers wanted to share the weight of their backpacks equally. Their backpacks weigh 31, 37, and 25 pounds. How much weight should each hiker carry?
a) 31
b) 39
c) 93
d) 30
Answers
Answer:
A
Step-by-step explanation:
Answer:
The answer is A) 31
Step-by-step explanation:
31 +37 +25 = 93
93 divided by 3 = 31
is multiplying by 10x10x10 the same as multiplying by 10 factors of 3?explain
Answers
No, multiplying by 10x10x10 is not the same as multiplying by 10 factors of 3.
Does multiplying by 10x10x10 yield the same result as multiplying by 10 factors of 3?Multiplying by 10x10x10 is not equivalent to multiplying by 10 factors of 3. When you multiply a number by 10, you're essentially adding a zero to the end of it, shifting all the digits one place to the left. So, multiplying by 10 three times (10x10x10) adds three zeros to the original number. However, when you multiply by 10 factors of 3, you are essentially multiplying the number by 3 ten times consecutively. This results in a different outcome.
For instance, if you start with the number 5 and multiply by 10x10x10, you would get 5,000. On the other hand, multiplying by 10 factors of 3 would yield a much larger number, 59,049, because each multiplication by 3 amplifies the result. Therefore, the two operations are not equivalent.
Therefore, multiplying by 10x10x10 and multiplying by 10 factors of 3 yield different outcomes. The former adds three zeros to the original number, while the latter multiplies the number by 3 repeatedly, resulting in a much larger value. It's crucial to understand the distinction between these operations to avoid confusion and accurately calculate mathematical expressions.
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dr. stuart wants to study whether there is a relationship between the number of hours a high school senior spends on social networking sites and their grade point average. he obviously cannot study every 12th grader, so instead he will select a smaller of seniors to study. a. cross-section b. population c. sample d. confounding group
Answers
He will pick a sample of seniors in this instance.
Given statement,
Dr. Stuart wants to study whether there is a relationship between the number of hours a high school senior spends on social networking sites and their grade point average. he obviously cannot study every 12th grader, so instead, he will select a smaller of seniors to study.
→ In this case he will select a sample of seniors.
→ Dr. Stuart is interested in determining whether there is a correlation between a high school senior's grade point average and the number of hours spent on social networking sites. He will instead choose a smaller sample of seniors to study because he certainly cannot study every student in the 12th grade.
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Find the sum of the arithmetic sequence
-10, -7, -4, -1, 2, 5, 8
Answers
The question isn’t that clear and good luck
1) Analyze the equation: y = 5x + 10 What is the y-intercept? *
5
-5
10
-10
Answers
Answer:
10
Step-by-step explanation:
Plug in x=0
5(0)+10
0+10=10
Answer:
y=10
Step-by-step explanation:
First, you have to substitute x=0
y=5 x + 10
y=5 x 0 + 10
Solve the equation for y
y=10
You know that 3 pencils and 7 pens cost $24, while 3 pencils and 3 pens cost S12.
How many dollars are 4 pencils and 5 pens worth?
Answers
Answer:
5 pens = 15$ and 4 pencils = 4$
Step-by-step explanation:
7-3=4, so 4 pens is 12$
12/4 = 3, so 1 pen = 3$
Remove the pens from the equation
7x3=21
24-21=3
3/3=1, so each pencil costs 1$
4 pencils and 5 pens are worth $23.
What is an expression?An expression contains one or more terms with addition, subtraction, multiplication, and division.
We always combine the like terms in an expression when we simplify.
We also keep all the like terms on one side of the expression if we are dealing with two sides of an expression.
Example:
1 + 3x + 4y = 7 is an expression.com
3 + 4 is an expression.
2 x 4 + 6 x 7 – 9 is an expression.
33 + 77 – 88 is an expression.
We have,
Let the cost of one pencil be x, and the cost of one pen be y.
Then we can set up the following system of equations based on the given information:
3x + 7y = 24 ...(1)
3x + 3y = 12 ...(2)
Solving these two equations, we can find that x = 2 and y = 3.
Now, we can use these values to find the cost of 4 pencils and 5 pens:
4x + 5y = 4(2) + 5(3) = 8 + 15 = $23
Therefore,
4 pencils and 5 pens are worth $23.
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I really need help if for a test plz help
What is the selling price of a $610 couch with a 35% markup?
Answers
171.248 Answer:
Step-by-step explanation:
You need to divide 600 by .35
Answer is
The radius r in millimeters of a platinum with L centimeters long with resistance 0.1 ohm is r equals 0.059L^1/2. How long is a wire with radius 0.236 millimeters?
rational exponents!
Answers
The length of the wire with a radius of 0.236 millimeters is 16.5 cm.
What is the length of the wire?We are given the formula for the radius of a platinum wire in terms of its length L and resistance R:
\(r = 0.059L^{(1/2) } \ mm\)
We are also told that the resistance of the wire is 0.1 ohm.
We can use the formula for the resistance of a wire in terms of its length L, cross-sectional area A, and resistivity rho:
R = ρL/A
where;
ρ is the resistivity of platinum, which is 10.6 x 10⁻⁸ ohm-meter.We can rearrange this formula to solve for the cross-sectional area:
A = ρL/R
Substituting the given values, we have:
A = (10.6 x 10⁻⁸ ohm. m)(L m)/(0.1 ohm)
A = 1.06 x 10⁻⁶ m L
We can also use the formula for the area of a circle in terms of its radius:
A = πr²
Solving for the radius, we have:
r = √(A/π)
Substituting the expression for A, we have:
r = √[(1.06 x 10⁻⁶ m.L )/π]
Substituting the given radius of 0.236 mm, we can solve for the length L:
0.236 x 10⁻³ m = √[(1.06 x 10⁻⁶ m.L)/π]
Squaring both sides, we have:
(0.236 x 10⁻³ m)² = (1.06 x 10⁻⁶ m.L)/π
Solving for L, we have:
L = [(0.236 x 10⁻³ m)² π]/(1.06 x 10⁻⁶ m)
L = 0.165 m = 16.5 cm
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What is the value of 6 [4-9.4]? -36 -33 -32 -30
Answer: D: -30
Answers
Answer:
D. -30
Step-by-step explanation:
EDGE 2021 I GOT 100%
-x/3 + 4 =20 books never written
Answers
The value of x from the given linear function is -48
What are linear equations?Linear equations are equation that has a leading degree of 1. For instance the equation y = mx + b is a linear equation.
Given the equation below
-x/3 + 4 =20
We are to determine the value of x
Subtract 4 from both sides to have;
-x/3 + 4 - 4 = 20 - 4
-x/3 =20 - 4
-x/3 = 16
Multiply both sides by 3 to have
-x = 3(16)
-x = 48
x = -48
Hence the value of x from the given linear function is -48
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let f(x)=3|x-7|+11. write a function g whose graph is a vertical shrink of the graph of f by a factor of 1/2
Answers
Thus, the function g(x) is:
g(x) = (1/2)f(x)
Substituting the expression for f(x), we get:
g(x) = (1/2)[3|x-7| + 11]
Now, we simplify this expression by distributing the 1/2 coefficient:
g(x) = (3/2)|x-7| + 11/2
So the function g(x) is g(x) = (3/2)|x-7| + 11/2.
The graph of g(x) will have the same shape as the graph of f(x), but it will be compressed vertically by a factor of 1/2, making it half as tall as the graph of f(x).
A group of scientists is conducting an experiment on the effects of media on children. they randomly select 100 children and randomly assign each child to one of four treatment groups. each treatment group has a specific amount of screen time during a one-week time frame. the first group has no screen time, the second group has two hours of screen time, the third group has four hours of screen time, and the fourth group has six hours of screen time. after the first week, the scientists conduct the same experiment, with the same subject groups, for three more weeks so that each group experiences each of the four treatments. which statements about this study are true?
Answers
The statements that are true about this study are
This study uses random samplingThis study uses a control groupThis study uses a repeated measures designThis is further explained below.
What is an experiment?Generally, a scientific technique is used to create a discovery, test a theory or show an established truth.
In conclusion, The following are accurate claims concerning this study:
Random sampling is used in this investigation. In this investigation, a control group is used. Repeated measurements are employed in this investigation.
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anyone know this question: 16) -8(-21 - 2) - 6
Answers
Answer:178
Step-by-step explanation:
distribute, multiply -8 with - 21 and -2 . that would get you 168 + 16 - 6. add the 168 and 16, it equals 184, then subtracts it with a 6.
I need help with this I don't understand
Answers
Answer:
Sin ? = 4/7
? = arcSin (4/7)
? = 35° (rounded to the nearest degree)
So the answer is 35°
Answered by GAUTHMATH
The expression
−
20
r
2
+
1
,
400
r
−
12
,
000
represents the total profit made by a company when selling a certain product for
r
dollars. Which inequality represents the sale price, in dollars, when the total profit will be at most
10
,
000
dollars?
−
20
r
2
+
1
,
400
r
−
12
,
000
>
10
,
000
− − 20 r 2 + 1 , 400 r − − 12 , 000 > 10 , 000
−
20
r
2
+
1
,
400
r
−
12
,
000
≥
10
,
000
− − 20 r 2 + 1 , 400 r − − 12 , 000 ≥ ≥ 10 , 000
−
20
r
2
+
1
,
400
r
−
12
,
000
<
10
,
000
− − 20 r 2 + 1 , 400 r − − 12 , 000 < 10 , 000
−
20
r
2
+
1
,
400
r
−
12
,
000
≤
10
,
000
Answers
Which equation has infinitely many solutions?
A 8x = 8(x - 1)+1
B. 2x-5 = 2(x - 5)
C. 22-6x = 2(3x - 11)
D. 3(5x - 4) - 8x = 7x -12
Answers
Proof : 22-6x=2(3x-11)
Now let’s distribute the second pert of above equation
22-6x=6x-22 since it is the same it does t matter what value you have for x therefore it will have infinite solutions
Hence the equation 3(5x - 4) - 8x = 7x -12 has infinite number of solutions.
What is an equation?An equation is a statement of equality between two expressions consisting of variables, numbers and arithmetic operations.
Step-by-step explanation:
The equation 8x = 8(x - 1)+1 can be simplified as
8x=8x-8+1
0=-7( absurd)
This equation does not have any solution.
The equation 2x-5 = 2(x - 5) can be simplified as
2x-5=2x-10
-5=-10(absurd)
This equation does not have any solution.
The equation 22-6x = 2(3x - 11) can be simplified as
22-6x=6x-22
-6x-6x=-22-22
-12x=-44
x=44/12=11/3
This equation has only one solution.
The equation 3(5x - 4) - 8x = 7x -12 can be simplified as
15x-12-8x=7x-12
7x-12=7x-12
0=0, is an identity
This equation has infinite number of solutions.
Hence the equation 3(5x - 4) - 8x = 7x -12 has infinite number of solutions.
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Verify through an informal, paragraph proof that in a kite, one diagonal bisects a pair of opposite angles. You can refer to this image.
Answers
hope this helps :)
refer to the image here
Answer:c
Step-by-step explanation:
is y=28(0.438)^8 growth or decay
Answers
Answer:
decay
Step-by-step explanation:
y=28(0.438)^8
This is in the form
y = a b^x
a is the initial value and b is the rate of growth or decay
since b < 1 the function is decaying
2/3 = 16/x
What is X
Answers
Answer:
Step-by-step explanation:
x=24
Answer:
X = 24
Step-by-step explanation:
Learn what 2/3 equals
2/3 = 0.666
Divide 16 until it equals that number
16/24 = 0.666
y = RootIndex 3 StartRoot x EndRoot. y = negative (0.4) RootIndex 3 StartRoot x minus 2 EndRoot
Which of the following describes the graph of the transformed function compared with the parent function? Select all that apply.
Answers
Answer:
- Reflected over the x-axis
- Compressed by a factor of 0.4.
- Translated 2 units left
Step-by-step explanation:
Given
\(y = \sqrt[3]{x}\)
\(y' = -(0.4)\sqrt[3]{x-2}\)
Required
The transformation from y to y'
First, y is reflected over the x-axis.
The transformation rule is:
\((x,y) \to (x,-y)\)
So, we have:
\(y = \sqrt[3]{x}\) becomes
\(y' = -\sqrt[3]{x}\)
Next, it was compressed by a scale factor of 0.4
The rule is:
\(y' = k * y\)
Where k is the scale factor (i.e. k = 0.4)
So, we have:
\(y' = 0.4 * -\sqrt[3]{x}\)
\(y' = -(0.4)\sqrt[3]{x}\)
Lastly, the function is translated 2 units left;
The rule is:
\((x,y) \to (x-2,y)\)
So, we have:
\(y' = -(0.4)\sqrt[3]{x - 2}\)
Answers:
-reflected over the x-axis
-translated 2 units right
-compressed by a factor of 0.4