The amount of balls in a given layer can be found by squaring the layer it is in
4 layers
top layer (1st) is 1
2nd is 4
3rd layer is 9
4th is 16
add them up
1+4+9+16=30
30 in that pyramid
(15)(x+5) because product means multiply the two terms tigether
Answer:
Step-by-step explanation:
The total amount of money is 75 dollars
There are 5 fifteens in 75
There are 6 dollars saved everytime he makes 15 dollars
6 x 5 = 30
He saved 30 dollars
Answer:
12.85
Step-by-step explanation:
75.00-21.95-23.42-16.75=12.85
