A minor tune-up should be done every 15,000 miles and cost $59.95. How much is the cost of 4 years of minor tune ups?

Bring the fraction a/a-4 to a denominator of 16-a^2

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )

Interpret the following expression (5y^2-7)^3/(2y)^2