16, because 1 foot is 12 inches, so 28 - 12 = 16
Answer:
Step-by-step explanation:
<u>Given system:</u>
<u>Multiply the first equation by 7 and add up the equations:</u>
- -7x + 7y + 7x + 3y = 7*8 - 16
- 10y = 40
- y = 4
<u>Find y:</u>
Yes because 18% is an abbysmal amount for a tip
1,3,5 because they are all negatives less than -3
