All categories

3 years ago

Transformation of Functions: Need help with problem.

Mathematics

1 answer:

antiseptic1488 [7]3 years ago

6 0

It is horizontally stretched by a factor of 0.5.

If the number next to the variable inside the root is a fraction (which it is), it horizontally stretches the parent function.

You might be interested in

Please help, thank you.

irakobra [83]

Answer:

4:1 is first answer

10:3 is second answer

5 0

2 years ago

Read 2 more answers

The expression below is a sum of cubes. True or false<br> 64x^3+ 125<br> A. True<br> B. False

olchik [2.2K]

Answer:

True

Step-by-step explanation:

64x³ + 125

64x³ = (4x)³ ← a perfect cube

125 = 5³ ← a perfect cube

Thus 64x³ + 125 ← is a sum of cubes

6 0

3 years ago

A research group needs to determine a 90% confidence interval for the mean repair cost for all car insurance small claims. From

lutik1710 [3]

Answer:

a) $z = 1.645$

b) The should sample at least 293 small claims.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.9}{2} = 0.05$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.05 = 0.95$ , so $z = 1.645$ , which means that the answer of question a is z = 1.645.

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

(b) If the group wants their estimate to have a maximum error of $12, how many small claims should they sample?

They should sample at least n small claims, in which n is found when

$M = 12, \sigma = 124.88$ . So

$M = z*\frac{\sigma}{\sqrt{n}}$

$12 = 1.645*\frac{124.88}{\sqrt{n}}$

$12\sqrt{n} = 205.43$

$\sqrt{n} = \frac{205.43}{12}$

$\sqrt{n} = 17.12$

$\sqrt{n}^{2} = (17.12)^{2}$

$n = 293$

The should sample at least 293 small claims.

8 0

2 years ago

What is the input value for which f(x)=3

777dan777 [17]

X=-3. The question is wanting to know that if y=3, what does x equal? Well the only y-value that has y=3 on this line is x=-3

7 0

3 years ago

Read 2 more answers

Which digit is in the hundredths place in the number 742.891?

tatiyna

They mean the decimal portion. it goes 10s. 100s. 1,000s. so the 100ths is thr number 9

4 0

3 years ago