Answer:
A, B, and C
Step-by-step explanation:
Let's simply the equation first
- -2(-8 - 4y + 3/4)
- 16 + 8y - 1 1/2
What did Daniel do wrong?
Well, let's break down what I did and compare it to Daniel.
- <em>I multiplied -2 and -8x to get 16x. A negative number times a negative number is positive, and 2 times 8 is 16</em>
Daniel, on the other hand, added the two terms.
The first term should be positive (A)
- <em>I multiplied -2 and -4y to get 8y. The same sign rules apply.</em>
Daniel got a negative number, but it is supposed to be positive (B)
- <em>I multiplied -2 and 3/4 should be -6/4, which simplifies to -1 2/4 which is further reduced to -1 1/2</em>
Daniel multiplied and simplified incorrectly (C)
-Chetan K
Well you shaded in two of the six, so it is 2/6.
Answer:
y = 3 + 0.25x
Step-by-step explanation:
<em>x</em><em> represents the miles and if Skyler is charged $0.25 per mile, then </em><em>x</em><em> goes with the </em><em>0.25.</em><em> The $3 is a flat fee and doesn't get added any more times then when it is first added.</em>
Answer:
There is sufficient evidence to support the claim that the new balls have bounce heights with a mean different from 92.8292.82 inches, and it appears that the new baseballs are different
Step-by-step explanation:
Given that in previous tests, baseballs were dropped 24 feet onto a concrete surface, and they bounced an average of 92.82 inches
But new balls showed mean of 92.6 inches with s = 1.72 inches
Sample size = 23
Since sample size is less than 30 and population std deviation is not know we use t test
![H_0: \bar x = 92.82\\H_a: \bar x \neq 92.82](https://tex.z-dn.net/?f=H_0%3A%20%5Cbar%20x%20%3D%2092.82%5C%5CH_a%3A%20%5Cbar%20x%20%5Cneq%2092.82)
(Two tailed test at 5% significance level)
Mean difference = ![92.6-92.82=-1.22](https://tex.z-dn.net/?f=92.6-92.82%3D-1.22)
Std error of sample mean = s/sqrt n = ![\frac{1.72}{\sqrt{23} } \\=0.3586](https://tex.z-dn.net/?f=%5Cfrac%7B1.72%7D%7B%5Csqrt%7B23%7D%20%7D%20%5C%5C%3D0.3586)
Test statistic t = mean diff/std error = -3.402
df = 23-1 =22
p value = 0.002559
since p value <5% we reject H0
There is sufficient evidence to support the claim that the new balls have bounce heights with a mean different from 92.8292.82 inches, and it appears that the new baseballs are different