Which of the following is not a solution of 10 > x – 7y? a. (2, 10) b. (–3, 10) c. (0, 7) d. (12, 0)

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

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! )

The sum of 5consecutive even numbers is 100. what is the first number in this sequence?