Please help and show work
6x^2+42x
2)^2-7x-30
3) x^2+9x+20
4) x^2-14x+48
5) 2x^2+21x+11
6) 5a^2 - 125
7) 8 x^2-6x-9
8) 4x^2y-24xy+32

Asap 25 pts + brainliest to right/best answer

Which point is a solution to y s 4x + 5?

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6