All of them have the same answer of -8 except the last one.
Answer:
(24,13)
Step-by-step explanation:
24 is Sarah's age.
13 is Mike's age.
System:

I hope this helped!
<span>1 gallon is 128 fluid ounces;
4 quarts make 1 gallon.
Change the mixed unit volume of antiseptic to just one unit. Which you choose is your choice.
((3 1/2) -4)) </span>quarts = ((7/2)+4)) quarts = (7+8/2) quarts = (15/2) quarts
<span>
15/2 quarts = 240 fluid ounces</span>