How do you find the missing sides when there are two shapes with a ratio

Factor k2 - 17k + 16. a.(k - 2)(k - 8) b.(k - 1)(k + 16) c.(k - 1)(k - 16)

Richard save $32 in march he saved $48 in april and $38 in may then richard spent $113 on a keyboard how much money does richard have left

3x + 4y = 5 x- 3y = -7 solve by substitution