Solve the expression for: x = 2 and y = 5 x2 + 2y2 + 15

I've never been good at math he told he loves but he keeps cheating on me, so it ain't adding up sis

Janet drove 300 miles in 4.5 hours. write an equation to find the rate at which she was traveling

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.