Alex, David, and Jennifer each have a collection of baseballs. David has 12 less than twice as many as Alex. Jennifer has 8 more than half as many as Alex. All together they have 80 baseballs. Select the equation that will help you learn how many baseballs Jennifer has.

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.

What is the value of x in the equation 1.5x+4-3=4.5(x-2)?

Ellen makes and sells bookmarks. she graphs the number of bookmarks sold compared to the total money earned. why is the rate of change for the function graphed to the left?