If ln = 6x-5, lm = x+7 and mn = 3x+20 find mn

Find the zero function by factoring (try to show work) h(x)=-x^2-6x-9

Samantha is growing a garden in her back yard. she spend $90 setting up the garden bed and buying the proper garden supplies. in addition, each seed she plants cost $0.25. a. write the function f(x) that represents samantha's total cost on her garden. b. explain what x represents. c. explain what f(x) represents. d. if samantha plants 55 seeds, how much did she spend in total?

Determine domain and range, largest open interval, and intervals which function is continuous.