Dan spent half of his allowance going to the movies. He washed the family car and earned 7 dollars. What is his weekly allowance if he ended with
12 dollars ?

16

Step-by-step explanation:

1/2x + 8 = 16

1/2x = 16 - 8

1/2x = 8

x = 8 * 2

x = 16 <== his weekly allowance

anser is a

step-by-step explanation:

negitive slope

80π/3 or about 83.775

step-by-step explanation:

since a cone is 1/3 of a cylinder, we need to find the base's area. since area = πr^2, we get 16π. then, multiplying this by 5, we get 80π. dividing by 3, since the cone's volume is 1/3 of that of a cylinder's, we get 80π/3.

hope this !