Answer:the original number is 7
Step-by-step explanation:
Let the number be represented as X
so that when multiplied by 4 gives 4x
which on addition to 12 gives
4x +12=40
4x=40-12
4x =28
x=28/4=7
To find total combinations, multiply the quantity of each part by each other.
9 x 6 x 10=540 total
Formula
Area = L*w
Hint : To find the area of a rectangle , multiply the length times the width
I hope that's help !