What is the fractional form of 0.8 repeating

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

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?

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way