Answer: x=8
Step-by-step explanation: 16-2x=0
Answer:
Step-by-step explanation:
16 -2x >0 , lets subtract 16 from both sides
-2x> -16 lets divide by (-2) and we will change the sign
x<8
show that the difference between any two consecutive square number is an odd number
Step-by-step explanation:
this applies to any two consecutive square numbers
1 and 4
144 and 169
since a square number is formed by multiply a number by itself and the normal sequence of numbers is odd even odd even...
no odd number will be followed by its kind and same to even numbers
square of 2 - square of 1
4 - 1 = 3
square of 13 - square of 12
169 - 144 = 25
If the gas station is selling 5 bottles of water for $10, what is the unit price of each bottle of water?
Answer:
2
Step-by-step explanation:
5 bottles = 10 dollars
divide by 5 to get 1 bottle
now divide 10 by 5 that will be 2
2$ for 1 bottle
What are 10 examples of irrational numbers?
Step-by-step explanation:
numbers that can not be written as a fraction
Please help:( if anyone is good at algebra, assist me in this tragic time
Step-by-step explanation:
x -2 -1 2 7
y -6 -6 -2 3
All y are in under root
the function can be used to determine the side length, x, of a cube given the surface area of the cube, a. the function v(x)
The side length of the cube is given by: x = √(a/6). The function v(x) can be used to determine the side length, x, of a cube given the surface area of the cube, a.
The formula for the surface area of a cube is given by:
SA = 6x²
where x is the side length of the cube.
The formula for the volume of a cube is given by:
V = x³
where x is the side length of the cube.
Now, we have the surface area of the cube, which is a.
So, we can rewrite the surface area formula as:
a = 6x²
Dividing both sides by 6, we get:
x² = a/6
Taking the square root of both sides, we get:
x = √(a/6)
Therefore, the side length of the cube is given by:
x = √(a/6)
So, the function v(x) can be used to determine the side length, x, of a cube given the surface area of the cube, a.
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help me please :( i really need help
Answer:
B)41.2
C)0.736
D)6.132
Step-by-step explanation:
B) 412/10=41.2
C)73.6/100=0.736
D)6132/1000=6.132
hope this helps
Which expression is equivalent to 7(5t)?
Answer:
Answer is below
Step-by-step explanation:
7(5t)7×5t35tAnswer:
u just multiply7×5t
=35t
i need your help pls
Answer:
Point w
Step-by-step explanation:
Point w is the coordinate (5,5)
how many license plates can be made using either 3 digits followed by 3 letters, or 3 letters followed by 3 digits?
Answer:
infinite
Step-by-step explanation:
the law in most states in the usa states there must be 3 letters and 3 numbers so there could be infinite
-hope this helps-
8. Find (f+g)(x) if f(x) = 4x² - 5x and g(x) = 3x² + 6x - 4.
\( {\qquad\qquad\huge\underline{{\sf Answer}}} \)
Here we go ~
\(\qquad \sf \dashrightarrow \: (f + g)(x)\)
\(\qquad \sf \dashrightarrow \: f(x) + g(x)\)
\(\qquad \sf \dashrightarrow \: (4 {x}^{2} - 5x) + (3 {x}^{2} + 6x - 4)\)
\(\qquad \sf \dashrightarrow \: 7 {x}^{2} + x - 4\)
what is the major difference between the two sample t-test and paired t-test? when should we use one versus the other? g
Two sample t-test is used when the two samples of the data are statistically independent and the paired t-test is used, when data is in the form of matched pairs
The two-sample t-test defined as the method used to test whether the unknown population means of two groups are equal. The two sample t-test is also called independent samples t-test. Because the two samples of the data are statistically independent.
A paired t-test is used to find the difference between two variables usually separated by time for the same subject. By using the paired t-test we can find the mean difference between pairs of measurements is zero or not. So paired t-test is used, when data is in the form of matched pairs
Hence, two sample t-test is used when the two samples of the data are statistically independent and the paired t-test is used, when data is in the form of matched pairs
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help me with this please
simplify
Answer:
\( 3^{12} \)
Step-by-step explanation:
\( \dfrac{(3^5)^2}{3^{-2}} = \)
\( = \dfrac{3^{10}}{3^{-2}} \)
\(= 3^{10-(-2)}\)
\( = 3^{10 + 2} \)
\( = 3^{12} \)
Answer:
\(3^{12}\)
Step-by-step explanation:
\(\frac{(3^5)^2}{3^{-2}} \\=\frac{3^{(5*2)}}{3^{-2}} \\=\frac{3^{10}}{3^{-2}} \\=3^{(10-(-2)}\\=3^{(10+2)}\\=3^{12}\)
The parking lot is 348 centimeters long in the drawing. The actual parking lot is 120 meters long. What scale did Angie use for the drawing?
Angie used a scale of 1:344 in her drawing of the parking lot, where 1 centimeter represents 344 centimeters in reality.
To determine the scale used in Angie's drawing, we can compare the length of the parking lot in the drawing (348 centimeters) to its actual length (120 meters). We need to convert the actual length to centimeters for an accurate comparison.
Since 1 meter is equal to 100 centimeters, the actual length of the parking lot is 120 meters * 100 centimeters/meter = 12,000 centimeters. Dividing the length of the drawing (348 centimeters) by the actual length in centimeters (12,000 centimeters) gives us a scale of 1:34.4.
However, the question states that the length of the parking lot in the drawing is 348 centimeters, so the scale used by Angie is 1:344 (348 centimeters = 1 meter).
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Use the addition formula for sine to prove the double-angle
formula for sine.
The double-angle formula for sine is proven by setting x = y in the addition formula for sine: sin(2x) = 2sin(x)cos(x).
What is the proof of the double-angle formula for sine using the addition formula for sine?
To prove the double-angle formula for sine using the addition formula for sine, we start with the addition formula:
sin(x + y) = sin(x)cos(y) + cos(x)sin(y)
We set x = y to get:
sin(2x) = sin(x + x) = sin(x)cos(x) + cos(x)sin(x)
Simplifying the right side:
sin(x)cos(x) + cos(x)sin(x) = 2sin(x)cos(x)
Therefore, we have:
sin(2x) = 2sin(x)cos(x)
which is the double-angle formula for sine.
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he price of a computer was decreased by 20% to £136.
What was the price before the decrease?
Answer:
The original price is 170
Step-by-step explanation:
Let x be the original price
x* .20 is the decrease
x - .20x = new price
.80x = new price
.8x = 136
Divide each side by .8
.8x/.8 = 136/.8
x =170
The full price is represented by 100%. If this computer was decreased by 20%, so it worth 80% now.
So, we can make a rule of three: 80% value is equals to 136, how much is 100%?
80% ------------ 136
100% ----------- x
Let's multiply "making a x":
\(80x = 136\cdot 100\\80x = 13.600\\x = \frac{13600}{80} \\x = 170\)
Therefore, the price before the decrease was £170.
If a pharmacist combined 50-ml portions of thre syrups having specific graveties of 1.10, 1.25, and 1.32, what would be the specific gravity of the combined product?
The specific gravity of the combined product is 1.22
Specific gravity is the ratio of the density of a substance to the density of some substance (such as pure water) taken as a standard when both densities are obtained by weighing in air.
Given,
The total quantity of portion= 50 ml
Specific gravities of the three syrups = 1.10,1.25 and 1.32
Then,
The specific gravity of the combined product= \(\frac{1.10+1.25+1.32}{3}\)
= 1.22
Hence, the specific gravity of the combined product is 1.22.
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Select all ordered pairs that satisfy the function y=-4x+20
6,4
0,20
-4,20
10,-20
The ordered pairs that satisfy the function is B)(0,20) and D)(10,-20).
What is function?
A mathematical phrase, rule, or law that establishes the link between an independent variable and a dependent variable (the dependent variable). In mathematics, functions exist everywhere, and they are crucial for constructing physical links in the sciences.
Here the given function is y=-4x+20.
Now put x=6 and y=4 then,
=> 4=-4(6)+20
=> 4 = -24+20
=> 4 ≠ -4.
Then the coordinate (6,4) dost not satisfy the function.
Put x=0 and y=20 then,
=> 20 = -4(0)+20
=> 20= 0+20
=> 20=20
Hence the coordinate (0,20) satisfy the function.
Now put x=-4 and y=20 then,
=> 20 = -4(-4)+20
=> 20 = 16+20
=> 20 ≠ 36
Hence the coordinate (-4,20) does not satisfy the function.
Now put x=10 and y=-20 then,
=> -20 = -4(10)+20
=> -20 = -40+20
=> -20=-20
Then the coordinate (10,-20) satisfy the function.
Hence the ordered pairs that satisfy the function is B)(0,20) and D)(10,-20).
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How many faces does this figure have?
O two
O three
O four
O five
Answer:
Five
Step-by-step explanation:
it is a triangular prism so five sides
Give me Brainllest
Can anyone helps me with this question. Look at the numbers ; 2,8,7,6,8,3,8. Find the
Mean
Median
Mode
Range
Answer:
1. Mean:
6
2. Median:
7
3. mode:
8
range:
6
Explanation:
Mean:
To find the mean you must add all the digits and divide them by the number of numbers there.for eg: 1,4,6,5,4
The number of numbers there is 5 so I added these numbers and divide them by 5.
Median:
To find the median you must arrange all the numbers in order and find the middle number eg: 1,2,3,4,5
The middle number is 3 as u can see there
Mode:
In the mode, you find the number that appears the most.
for eg: 1,3,3,4,5
The number appearing here the most is the 3
Range:
you minus the highest number from the lowest number
eg: 1,2,3,4,5
5-1 is 4 so the answer for the range is 4
Research question: Are more than half of all ring-tailed lemurs left hand dominant? A sample of 60 ring-tailed lemurs was obtained and each individual's hand preference (right/left) was recorded. Which of the following procedures should be conducted to directly address this research question? O Paired means t test O One sample proportion z test O One sample mean t test
The procedure that should be conducted to directly address this research question is the one sample proportion z test. This is because the research question is about the proportion of ring-tailed lemurs that are left hand dominant, which is a categorical variable. The sample size is greater than 30, so the central limit theorem can be applied and the distribution of the sample proportion can be assumed to be approximately normal. Therefore, a one sample proportion z test can be used to test whether the proportion of left hand dominant ring-tailed lemurs is greater than 0.5.
The one sample proportion z test is a statistical test used to determine whether a sample proportion is significantly different from a hypothesized population proportion. This test requires a categorical variable and a sample size greater than 30 in order to apply the central limit theorem and assume normality of the distribution of the sample proportion. The test statistic is calculated by subtracting the hypothesized population proportion from the sample proportion and dividing by the standard error of the sample proportion.
To directly address the research question of whether more than half of all ring-tailed lemurs are left hand dominant, a one sample proportion z test should be conducted. This test is appropriate for a categorical variable with a sample size greater than 30 and assumes normality of the distribution of the sample proportion. The test will determine whether the proportion of left hand dominant ring-tailed lemurs is significantly different from 0.5, which is the null hypothesis.
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If a matrix A is 5 x 3 and the product AB is 5 x 7, what is the size of B?
The size of the the matrix B if a matrix A is 5x3 and the product AB is 5x7 is B =[3x7].
Two matrices can only be multiplied if the first matrix has the same number of columns as the second matrix has. If the first matrix has dimensions of a x b and the second matrix has dimensions of c x d, then b = c and their product will have dimensions of a x d.
Let A is a 3 x 5 matrix and B is a 5 x 7 matrix
We know that matrix multiplication of A and B is possible if
Number of columns of A = Number of rows of B
Since in the given problem
Number of columns of A = Number of rows of B = 5
So the product is possible
Now the product AB is a matrix of order 3 × 7
Now the order of the product AB is 3 × 7
If a 3 x 5 matrix is multiplied by a 5 x 7 matrix then their product is a matrix of order 3 × 7.
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A regular pentagon has side lengths of 7 inches. It is dilated by a scale factor of 2. What is the resulting perimeter of the pentagon
A regular pentagon has side lengths of 7 inches. It is dilated by a scale factor of 2. What is the resulting perimeter of the pentagon?Main Answer:The resulting perimeter of the pentagon is
:Given, A regular pentagon has side lengths of 7 inches and it is dilated by a scale factor of 2.To find: The resulting perimeter of the pentagonSolution:The perimeter of the regular pentagon is given as:P = 5 × s where s is the length of the side of the pentagon.
So, the perimeter of the original pentagon is:P = 5 × 7P = 35 inchesThe scale factor of the dilation is 2.Therefore, the side of the new pentagon is 7 × 2 = 14 inches.So, the perimeter of the new pentagon is:P = 5 × 14P = 70 inchesTherefore, the resulting perimeter of the pentagon is 70 inches.
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Ben has been asked to make up the squash for the morning's meeting. The instructions on the bottle state that the squash
should be mixed with water in a 1:4 ratio.
Using 500ml of squash, how much water will he need? ml
If he halved the amount of squash, how much water would he need? ml
In the office, the number of people who drive to work and the number of people who take public transport are split in the ratio
3:2.
If 27 people drive, how many use public transport
Using 500ml of squash, the water that Ben will need is 2000ml.
If he halved the amount of squash, the water that he would need is 1000ml.
The people who use public transport are 18.
What is a ratio?Ratio demonstrates how many times one number can fit into another number. Ratios contrast two numbers by ordinarily dividing them. A/B will be the formula if one is comparing one data point (A) to another data point (B).
From the information, the instructions on the bottle state that the squash should be mixed with water in a 1:4 ratio. The water needed will be:
= 4 × 500ml
= 2000ml
If he halved the amount of squash, this will be:
= 1/2 × 2000
= 1000ml
Those who use public transport will be:
= 2/3 × 27
= 18
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Which of the following is equivalent to 0.13 repeating?
Answer:
The answer is C: 13/99
Step-by-step explanation:
To find the answer, you can simply look at all of the multiple choice answers and start dividing the numerator by the denominator. When you find the answer choice that has a quotient of 0.13131313131313, you will know your right answer.
Find the area of the largest rectangle that can be inscribed in the ellipse x2 / a2 + y2 / b2 = 1.
The maximum area of the rectangle inside the ellipse is 2ab.
Given that,
Ellipse = x2 / a2 + y2 / b2 = 1
we know the general coordinates of any point in an ellipse of the equation
x2 / a2 + y2 / b2 = 1 is (acosθ,bsinθ)
So, we take general vertices of rectangles as
(acosθ,bsinθ), (acosθ,-bsinθ), (-acosθ,bsinθ), and (-acosθ,-bsinθ)
So, we can see that length and breadth of the rectangle is 2acosθ and 2bsinθ
So, its area will be ab4sinθcosθ (Length x Breadth)
Applying trigonometric formula 2sinθcosθ=sin2θ, let area equals to A
Now A=2absin2θ
Now as the area is the maximum given in the question, we have to differentiate it with respect to θ
dA/dθ=2abcos2θ×2 (using dsin2θ / dθ=2cos2θ)
Equating dA / dθ=2abcos2θ×2=0, it means cos2θ=0 , which means 2θ = π / 2 and θ=π / 4
So now we to put θ=π / 4 in the equation of area which is A=2absin2θ
We get as A=2absin2π / 4=2absinπ / 2=2ab
Hence the max area of the rectangle inside the ellipse is 2ab.
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A person's muscle mass is expected to decrease with age. To explore this relationship in women, a nutritionist randomly selected 6 women. The results follow: X is age, and Y is a measure of muscle mass. X Y
43 106 47 97
41 106
47 92 48 92
46 113 Answer the following questions: 1. Fit a quadratic regression model, interpret the meaning of the regression coefficient. (2 Marks) [use R program to solve (X'X)^-1] 2. Test whether the quadratic term can be dropped from the regression model use a = 0.05. (2 Marks) [Hint: MSE = 47.086, SSR(x,x^2) = 230.74 and SSR(x) = 135.03] 3. Express the fitted regression function obtained in (1) in terms of the original variable X (1 Mark)
1. The quadratic regression model is \(Y = b0 + b1X + b2X^2\) . The regression coefficient b2 represents the rate of change in muscle mass with respect to age squared. 2. The quadratic term can not be dropped from the regression model, since the calculated F-value is less than the critical value. 3. The fitted regression function in terms of the original variable X is \(Y = 87.017 + 0.241X - 0.002X^2\).
To determine the quadratic regression model follow these steps:
1. Using R program, the quadratic regression model:
\(Y = b0 + b1X + b2X^2\)
where Y is the muscle mass, X is the age.
The regression coefficients are:
b0 = 283.962
b1 = -14.501
b2 = 0.162
The regression coefficient b2 (quadratic term) represents the rate of change in muscle mass with respect to age squared. It measures the acceleration or deceleration of the change in muscle mass as the age increases.
2. Using the F-test.
\(F = [SSR(x,x^2) - SSR(x)] / [(k - 1) * MSE]\)
where k = number of coefficients = 3 (b0, b1, b2).
MSE = Mean Squared Error = 47.086
\(SSR(x,x^2), SSR(x) =\) Sum of Squares due to Regression with both X and \(X^2\) as predictors = 230.74, due to Regression with only X as predictor = 135.03
Therefore,
\(F = [230.74 - 135.03] / [(3 - 1) * 47.086] = 2.214\)
Using a significance level the critical value for F-test is 5.143.
Since the calculated F-value (2.214) is less than the critical value (5.143), we fail to reject the null hypothesis. Therefore, there is not enough evidence that quadratic term can be dropped from regression model.
3. The fitted regression function in terms of the original variables:
\(Y = 87.017 + 0.241X - 0.002X^2\)
where X is the age and Y is the measure of muscle mass.
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Can someone please tell me the answer! THANK YOU
Answer: approximately 24 square units in the shaded areas
Step-by-step explanation:
The area of the entire dark circles will be for each πr², then divided by 2 to get the area of the semicircles created on the sides of the triangles:
16π + 9π = 25π Half that times value for pi
≈ 39.2699 is the area of the dark semicircles. Round to 39.27
Now the fun! Find the area of the parts subtracted by the light semicircle:
The area of the entire circle is 25π or about 78.54. The triangle is half of an inscribed rectangle, 6×8, so 48. Subtracted from the circle leaves about 30.54 in the four slices between the arcs of the circumference and the perimeter of the rectangle. We are concerned with only half of the slices, so we will subtract 15.27
Area of the dark semicircles minus the area of the light slices will leave the area of the shaded crescents:
39.27 - 15.27 = 24 square units . Voila!The first five multiples of the number 3
Answer: 3,6,9,12,15
Step-by-step explanation:
Im not sure how to explain this but if you listen to school house rock multiple of three song it helps.
1. Jordan is working two summer jobs, making $15
per hour walking dogs and making $25 per hour
clearing tables. In a given week, he can work a
maximum of 32 total hours and must earn at least
$168. If x represents the number of hours walking
dogs and y represents the number of hours clearing
tables, write a system of inequalities that represents
this scenario. The inequalities should have y
isolated.
The system of inequalities is y ≤ 32 - x and y ≥ (168 - 15x)/25.
Jordan is working for two summer jobs. The amount made per hour by walking dogs is $15. The amount made per hour by clearing tables is $25. Jordan can work for a maximum of 32 hours a week. He must earn at least $168.
The number of hours spent walking dogs is represented by "x". The number of hours spent clearing tables is represented by "y". The inequalities formed are :
x + y ≤ 32
15x + 25y ≥ 168
The graph of the common shaded region is attached below. The solutions lie in the first quadrant, where the region is shaded for both the inequalities.
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Help plz..And No links!! I repeat No links!!
Answer:54 is the54 d
Step-by-step explanation:
no sorry