Someone ! i'm bad at ! (5b - 9) - 3(8 - 2b) also, could you give me tips on how to solve these kind of problems? . - a math disaster

The box plot shows the number of raisins found in sample boxes from brand c and from brand d. each box weighs the same. what could you infer by comparing the range of the data for each brand? a) a box of raisins from either brand has about 28 raisins. b) the number of raisins in boxes from brand c varies more than boxes from brand d. c) the number of raisins in boxes from brand d varies more than boxes from brand c. d) the number of raisins in boxes from either brand varies about the same.

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

Which represents the solution set of the inequality 5x-9 < 21? a. x < 12/5 b. x > 12/5 c. x > 6 d. x < 6