What is the factored form of the polynomial? x^2 + 9x +20

Which of the following situations represents a linear relationship? a. theresa increases the distance she runs by 0.1 miles every week. b. the volume of a box depends on the length of box. c. the amount of money in a bank account increases by 1 percent each year. d. the population of a town doubles every 5 years.

If 3x+8=3x+8 is it one solution or no solution

What is the value of x when x + 7 = 21?