Answer:yes
Step-by-step explanation:
Store one since the 15% is take off 90 dollars which makes it 510
Answer:
4000 
Step-by-step explanation:
V = 1/3(Bh) where B is the area of the base and h is the height of the pyramid
B = 20(20) = 400 h = 30
V = 1/3(400)(30) = 4000 
If he took x trips last year
3x+1=7
3x=6
x=2
he took 2 trips last year