Show an equation equivalent to 12+18

18 years ago Ivan was 3 times older than his son but now he is only 2 times older. How old is Ivan?

Consider the probability that no less than 99 out of 150 cell phone calls will not be disconnected. Assume the probability that a given cell phone call will not be disconnected is 63%. Approximate the probability using the normal distribution.

Given a positive integer N, find all of the positive integers from 1 to N that can be written as a sum of 2 cubic numbers (also have to be positive) in two different ways.

A person who weighs 120 pounds on Earth weighs 20 pounds on the Moon. How much does a 93-pound person weigh on the Moon? A 93-pound person weighs pounds on the Moon.

Given the equation y = x-2, you substitute 5 for x. Check all true statements below. A) x is temporarily replaced with 5. B) The equation becomes y = 5-2. C) y is 3. D) The equation y = x - 2 is no longer true.

Miguel is able to save $87.37 each month. He wants to buy a guitar that costs $542.45. For about how many months will Miguel have to save before he can buy the guitar?

What is the radius of 4 cm

What is the factored form of 2t^3 + 8t^2-24t

Solve the solution of a system of linear equation 1/2 x + y = - 6 6 x + 2 y = 8

Sales of tablet computers at ted glickman's electronics store in washington, d. c., over the past 10 weeks are shown in the table below: week 1 2 3 4 5 6 7 8 9 10 demand 19 23 28 38 25 29 37 20 26 30 a) the forecast for weeks 2 through 10 using