For f(x) = 2x + 1 and g(x) = x2 – 7, find (f – g)(x). a. –x^2 + 2x – 6 b. –x^2 + 2x + 8 c. x^2 – 2x – 8 d. 2x^2 – 15

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. 4x^2 + 20x + 25 = 0

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

Travis and paula went to lunch.travis ordered a sandwich for $7.50 and paula ordered a burger for $5.25.after lunch,they left a 15% tip for the waiter.how many money did they spend altogether?