Stephanie's graduation picnic costs $7 for every attendee. Write an equation that shows the relationship between the attendees, a, and the cost, c.

Which of the following expressions are equivalent ?

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.

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