Amanatee surfaced for air 6 times in 240 seconds. how many seconds went by before the manatee surfaced the fourth time if it held its breath for the same rate?

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

Which of the following expressions is equal to 2x^2+8

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?