-(-7y + 12) = 7y - 12
u are distributing the -sign through the parenthesis...so u take the number outside of the parenthesis (and if it just a sign, the number is 1)...and u multiply it by everything in the parenthesis.
-1(-7y + 12) = -1 * -7y + (-1) * 12 = 7y + (-12) = 7y - 12

7 0

3 years ago

The wholesale cost of a pair of PUMA sneakers is $28. Academy Sporting Goods sells the sneaker for 74.99. Rounded to the nearest

Evgesh-ka [11]

<u>Answer:</u>

$167.8%$

The answer is also right here in this link: brainly.com/question/20831002

8 0

3 years ago

A recent national survey found that high school students watched an average (mean) of 6.8 movies per month with a population sta

Margaret [11]

Answer:

Step-by-step explanation:

Given that x = no of movies high school students watched is N(6.8, 1.8)

Sample size = 36 and hence std error = 1.8/6 = 0.3

$H_0: x bar = 6.8\\H_a: x bar < 6.8\\$

(two tailed test)

Mean difference = 6.2-6.8 = -0.6

Test statistic z = -0.6/0.3= -2

p value = 0.02275

Since p <0.05 we reject H0.

There is evidence to show that college students watch fewer movies a month than high school students

7 0

3 years ago

Whoever gets it right can have brainliest but answer ASAP!

DaniilM [7]

Answer:

3 1/3

Step-by-step explanation:

Multiply

2 1/2 * 1 1/3 = 20/6

Simplify

20/6 = 10/3 = 3 1/3

4 0

2 years ago

Read 2 more answers