17x5 = (? +7) x 5 = (? X 5) + (7x5) = 50 + 35 = 85

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! )

Find the center of the circle that can be circumscribed about efg with e(4,4) f(4,2) g(8,2)

Do xuan nam isgoing to invest $1000 at a simple interest rate of 4% how long will it take for the investment to be worth $1040?