I don't think giving you the exact answers would help, so here are the formulas:

For #1:
We're solving for a.
Answer: 72 units^2
Explanation:
Triangle to the left, you do 5(6) and get 30, but since it's a triangle, you divide by 2 and get 15. Middle rectangle, 6(8) is 48. Right triangle, 3(6) is 18, 18/2 is 9. Add them all up 15+48+9 and you get 72. Hope this helped!
If you use a calculator its easy
16.72 - 1.24 = 15.48
15.48 divided by 12 is 1.29
for sales tax 1.24 divided by 12 is .10
so for each one She spent $1.39
Multiply $43.85 by .05, take that add to original price and get $46.04. Next take $46.04 multiply that by .15, you will get $6.90. Then add it to $46.06 and get $52.94, divide by 4 and you will pay $13.24.
Answer:
D: (1,5) Apex
Step-by-step explanation: