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3 years ago

Problems due Monday.

Mathematics

2 answers:

Ilya [14]3 years ago

8 0

11) x = 6
12) x = 7/4

Leya [2.2K]3 years ago

5 0

11. 2+6x+4=3x+12Step 1: Simplify both sides of the equation.2+6x+4=3x+12(6x)+(2+4)=3x+12(Combine Like Terms)6x+6=3x+126x+6=3x+12Step 2: Subtract 3x from both sides.6x+6−3x=3x+12−3x3x+6=12Step 3: Subtract 6 from both sides.3x+6−6=12−63x=6Step 4: Divide both sides by 3.3x3=63x=2Answer:x=212.−5+8x+2=4x+4Step 1: Simplify both sides of the equation.−5+8x+2=4x+4(8x)+(−5+2)=4x+4(Combine Like Terms)8x+−3=4x+48x−3=4x+4Step 2: Subtract 4x from both sides.8x−3−4x=4x+4−4x4x−3=4Step 3: Add 3 to both sides.4x−3+3=4+34x=7Step 4: Divide both sides by 4.4x4=7/4x=7/4Answer:x=7/4

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There are two college entrance exams that are often taken by students, Exam A and Exam B. The composite score on Exam A is appro

elena55 [62]

Answer:

B.The score on Exam A is better, because the percentile for the Exam A score is higher.

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

Two exams. The exam that you did score better is the one in which you had a higher zscore.

The composite score on Exam A is approximately normally distributed with mean 20.1 and standard deviation 5.1.

This means that $\mu = 20.1, \sigma = 5.1$ .

You scored 24 on Exam A. So

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{24 - 20.1}{5.1}$

$Z = 0.76$

The composite score on Exam B is approximately normally distributed with mean 1031 and standard deviation 215.

This means that $\mu = 1031, \sigma = 215$ .

You scored 1167 on Exam B, s:

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{1167 - 1031}{215}$

$Z = 0.632$

You had a better Z-score on exam A, so you did better on that exam.

The correct answer is:

B.The score on Exam A is better, because the percentile for the Exam A score is higher.

3 0

4 years ago

Write a number sentence to compare 7.17 and 7.170

yulyashka [42]

Both of these values are the same, so the number sentence would state:

7.17 = 7.170

You can place any number of zeros to the very end on the right side (when there is a decimal point) without changing the value of the number.

7.1700000 = 7.17 also

5 0

4 years ago

What is the value of the expression below?

lozanna [386]

Answer:

25x10^18/4 or 6.25x10^18

Step-by-step explanation:

2.5x10^33x5x10^-15/2

12.5x10^18/2

6 0

3 years ago

ASAP!!!!!!!!!!!!

Phoenix [80]

The two transformations for fx and gx would be to shift by 6 units and also go up by 18.

<h3>What is a transformation?</h3>

This is the term that is used in mathematics to describe the manipulation of a line or a shape.

a. The possible transformations that can be gotten here would be to shift to the left by 6 units from what we have in the graph and also shift to the top by 18.

<h3>b. How to solve for K in the transformation</h3>

g of x = f(x - k) then

g(x)= f(x) + k

C. The value of k should be based on the way it changes based on the given points.

Vertically, g(x)=f(x) +18

Horizontally , g(x)=f(x-6)