Justin bieber buys a weight bench at his mansion for $500 and some weights for $24.99 each. the total cost of the purchase is $849.86. how many weights were purchased?

Which equation can be used to solve for the unknown number? seven less than a number is thirteen. n-7=13 7-n=13 n+7=13 n+13=7

Asocial networking site currently has 400,000 active members, and that figure is predicted to increase by 32% each year. the following expression represents the number of active members on the site after t years.

If y varies directly as x2 and y=6 when x=6, find the constant of variation.