14. Solve the algebraic expression x2 + 2x + 5 if x = 2. a. 10 b. 11 c. 12 d. 13 15. The area of a square with a side length of s is s2. What is the area of a square when s= 3 feet. a. 6 square feet b. 9 square feet c. 12 square feet d. 24 square feet 16. Which of the following are like terms? a. 5a and 2a b. 5a' and 5b c. o?b and ab? d. 2a and 3b 17. Which of the following are unlike terms? a.-2b and 2b b.-120 and -2b c. ab and 5ab d. 2a+b and -2a²b 18. Find the sum: 2a + 3a. a. 5a b. 5a2 c. 5+ a d. 5 + a2 19. Find the difference: 20x - 12x. a. 8x b.-8x c. 32x d. -32% 20. Find the sum of 15y - 9 and 8y + 11. a. 23y + 20 b. 23y - 20 c. 23y + 2 d. 23y - 2​