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3 years ago

Which rule would result in a clockwise rotation of 90° about the origin?

Mathematics

1 answer:

soldi70 [24.7K]3 years ago

6 0

A : x, y -> x, -y

Could jaut look this up

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One x-intercept for a parabola is at the point (0.6,0). Use the quadratic formula to find the

oee [108]

Answer:

the other x intercept would be -0.6

Step-by-step explanation:

7 0

3 years ago

The sixth-grade science class found that 20% of the students in the school were left- handed. If there were 800students in the s

makkiz [27]

Answer: 160

Step-by-step explanation:

So first you start by making the percent which is 20 a decimal (.20) . Then , you multiplu .20 by 800 and get 160 , or if you know 10% is 80 2 times that would be 20 percent . And 80 plus 80 is 160 .

4 0

3 years ago

Bose offers $50 cash back to customers who purchase a new speaker and send in proof of purchase. This is an example of a(n) ____

Semenov [28]

Example of Rebate: Bose offers $50 cash back to customers who purchase a new speaker and send in proof of purchase. Most effective, but most expensive, way to introduce a product.

7 0

3 years ago

Write the system of equations, then solve. SHOW ALL WORK!! please HELP! QUICK

uysha [10]

Answer:

3 30 page printers, 10 70 page printers

Step-by-step explanation:

x + y = 13

40x+70y = 820

Solving for y in first equation gives: y = 13 - x

Plug into second equation: 40x + 70(13 - x) = 820

40x + 910 - 70x = 820

-30 x = -90

x = 3

Plug into original equation: 3 + y = 13

y must = 10.

So, the company owns 3 thirty page presses, and 10 70 page presses,

5 0

2 years ago

A new cream that advertises that it can reduce wrinkles and improve skin was subject to a recent study. A sample of 70 women ove

Yanka [14]

Answer:

Yes, evidence shows that the cream will improve the skin of more than 40% of women over the age of 50 in 0.01 significance level.

Step-by-step explanation:

We need to make a hypothesis test.

Let p be the proportion of women who used cream report skin improvement.

$H_{0}$ : p=0.4

$H_{0}$ : p<0.4

To test the hypothesis, we need to calculate z-score of the sample mean and compare its probability with the significance level.

z= $\frac{p(s)-p}{\sqrt{\frac{p*(1-p)}{N} } }$ where

p(s) is the sample proportion of women reported improvement (0.5)

p is the proportion assumed under null hypothesis. (0.4)

N is the sample size (70)

Putting the numbers:

z= $\frac{0.5-0.4}{\sqrt{\frac{0.4*0.6}{70} } }$ ≈ 1.71

And P(z<1.71) ≈ 0.955. Since 0.955>0.01 we fail to reject the null hypothesis that the cream will improve the skin of more than 40% of women.

8 0

3 years ago