Donnie is 7 years old. Donnie's age is 3 years less than half of Ana's age. The relationship between the ages can be modeled by the equation 1/2x - 3 = 7, where x is Ana's age. How old is Ana?

20 years old

Step-by-step explanation:

Donnie is 7 years old. Donnie's age is 3 years less than half of Ana's age.

The relationship between the ages can be modeled by the equation

1/2x - 3 = 7, where

x is Ana's age.

Hence:

= x/2 - 3 = 7

Add 3 to both sides

1/2x - 3 + 3 = 7 + 3

1/2x = 10

x/2 = 10

Cross Multiply

x = 2 × 10

x = 20 years old.

Therefore, Ana is 20 years old.

answer: the answer is (b) amie should have multiplied

step-by-step explanation: given a sphere and a cylinder with same radius and height.

let, 'r' be the radius of the cylinder and sphere and 'h' be the height of the cylinder. according to the question,

r = h.

now, the volume of the sphere will be

and the volume of the cylinder will be

therefore, we have

thus, ammie should have multiplied the volume of the sphere

the answer is 9.8975

explanation:

when you multiply the "39.59" with the 25% it reduces it and shows its final discounted price. hope this !

step-by-step explanation: