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3 years ago

17/21- (3/7 + 2/7) please answer quick

Mathematics

1 answer:

adoni [48]3 years ago

8 0

Answer:

2/21

Step-by-step explanation:

17/21 -(3/7 + 2/7)

First you add

=17/21 - (5/7)

Then you want to subtract

=2/21

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Which function represents a vertical stretch of an exponential function?

nika2105 [10]

Answer:

A. $f(x)=3(\frac{1}{2})^x$

Step-by-step explanation:

The options are:

$A. f(x)=3(\frac{1}{2})^x\\\\B. f(x)=\frac{1}{2}(3)^x\\\\C. f(x)=(3)^{2x}\\\\ D. f(x)=3^{(\frac{1}{2}x)}$

For this exercise it is important to remember that, by definition, the Exponential parent functions have the form shown below:

$f(x) = a^x$

Where "a" is the base.

There are several transformations for a function f(x), some of those transformations are shown below:

1. If $bf(x)$ and $b>1$ , then the function is stretched vertically by a factor of "b".

2. If $bf(x)$ and $0$ , then the function is compressed vertically by a factor of "b"

Therefore, based on the information given above, you can identify that the function that represents a vertical stretch of an Exponential function, is the one given in the Option A. This is:

$f(x)=3(\frac{1}{2})^x$

Where the factor is:

$b=3$

And $3>1$

7 0

3 years ago

Read 2 more answers

Jennifer has 82.5 yards of fabric to make curtains. She makes 8 identical curtains and has 7.3 yards of fabric remaining. How ma

stepan [7]

Answer:

9.4 yards

Step-by-step explanation:

If 7.3 yards of fabric are remaining, then Jennifer uses 82.5-7.3=75.2 yards of fabric.

Jennifer uses 75.2 yards of fabric to make 8 identical curtains, then

$75.2:8=9.4$ yards of fabric Jennifer uses per curtain.

3 0

3 years ago

Find the area of this circle. Use 3 for .

weqwewe [10]

Answer:

ar40 of diameter

18ft

Step-by-step explanation:

1/2 to 1/2 is 2/4

4 0

3 years ago

It appears that people who are mildly obese are less active than leaner people. One study looked at the average number of minute

fredd [130]

Answer:

0.0322; 0.9929

Step-by-step explanation:

Since the data is normally distributed, we use z scores for these probabilities.

The formula for a z score of a sample mean is

$z=\frac{\bar{X}-\mu}{\sigma \div \sqrt{n}}$

For the sample of mildly obese people, the mean, μ, is 371; the standard deviation, σ, is 65; and the sample size, n, is 6.

Using 420 for X,

z = (420-371)/(65÷√6) = 49/(65÷2.4495) = 49/26.5360 ≈ 1.85

Using a z table, we see that the area under the curve to the left of this is 0.9678. However, we want the area to the right, so we subtract from 1:

1-0.9678 = 0.0322

For the sample of lean people, the mean, μ, is 528; the standard deviation, σ, is 108; the sample size, n, is 6.

Using 420 for X, we have

z = (420-528)/(108÷√6) = -108/(108÷2.4495) = -108/44.0906 ≈ -2.45

Using a z table, we see that the area under the curve to the left of this is 0.0071. We want the area under the curve to the right, so we subtract from 1:

1-0.0071 = 0.9929

7 0

3 years ago

A gym membership<br> charges an initial fee<br> of $150 then $20 per<br> month.

Vsevolod [243]

Answer:

n=150+20m

Step-by-step explanation:

we don't know how many months they're charging for, so we don't know the total of the amount.

7 0

3 years ago