Since you have y alone on one side of the equation......
Use substitution and plug in 1/2x-4 for y in the other equation.

Distribute

Combine like terms

Add 8 to both sides

Divide by 4
and 
Plug this value in for x

Simplify

Multiply everything by 8 and simplify

Divide.....

Your answers are:

Answer:
A. 7
Step-by-step explanation:
z ÷ (–7) = –1.
multiply each side by -7
z ÷ (–7)*-7 = –1.*-7
z = 7
-0.025 x 40=1
hope it help
To find the average number of pages the student read from day 2 to day 6, add the total pages in these days and divide by 5 days.
<h3>What is the average?</h3>
This is a very common word used in mathematics and stadistics to refer to the mean value in a set of values.
<h3>How to calculate the average from day 2 to day 6?</h3>
Add the pages the person read these days and then divide by 5 (total of days).
For example:
35 + 45 + 10 +25 + 20 = 135 / 5 = 27 pages
Note: This question is incomplete because the table is missing; due to this, the answer is based on general knowledge.
Learn more about average in: brainly.com/question/2426692