What can each term of the equation be multiplied by to eliminate the fractions before solving

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

Aprojectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = -16t2 + 704t. after how many seconds does the projectile take to reach its maximum height?

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.