Answer:
29.70
Step-by-step explanation:
Add up purchases 4.35+8.20+12.45+2.5=27.50
calc sales tax 27.50 x .08=$2.20
27.50+2.20=29.70
D(9, 1)
A being the midpoint means its coordinates satisfy ...
A = (E + D)/2
Solving for D, we find ...
D = 2A -E
= 2(4, 5) -(-1, 9) = (2·4 +1, 2·5 -9)
D = (9, 1)
c
24×36×5=4,320
4,320÷6=720
