What does x equal? I hate these and I’m really bad at them

What value of x is in the solution set of 4x - 12 s 16 + 8x? -10 -9 -8 -7

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

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