Twice jacks age plus five is 21. Write and solve an equation. How old is jack

What is the volume of a cylinder with height 4 and radius 2? Use 3.14 for pi.

3) Prove that there is ann ∈ N such that 0.001 ∉ (0,1/n). (Hint: findsuch an n.)

What is the rate of change for the function in the table? 2 songs for $1 $2 per song 4 songs for $1 $4 per song

H (x) = 4x-2. find h (x + 2)

H (x) = -4x - 7, when x = 3

A pair of socks costs $5.00. A package of 3 pairs costs $12.00. How much would you save if you buy 2 packages instead of 6 individual pairs?

A right triangle ABC is shown below: A right triangle ABC with height AB labeled 3 units and base BC labeled 5 units is shown. The area of the triangle above will equal one half of a rectangle that is 5 units long and __ units wide.

Peter has only quarters and dimes in his coin collection. If he has three times as many quarters as dimes, which is an expression for the number of quarters he has in terms of the number of dimes?

An airplane traveled 11,760 miles in 21 hours. On average, how many miles per hour did it fly?

Multiply. (x - 6) (5x - 4)