In the expressions ax + by and 5x – 3y, what do a, b, 5 and 3 stand for? a. variable b. exponents c. coefficients d. powers ____2. In 5x5y3 , what is the numerical coefficient? a. x5 b. 5xy c. 5 d. x5y3 ____3. The verbal phrase of the algebraic expression x+6 is a. six is more than twice a number x b. two numbers increased by six c. the sum of a number x and 6 d. the difference of six and a number x ____4. The phrase “a number n decreased by five” is translated algebraically as a. a. n + 5 b. 5 − n c. n – 5 d. 5n ____5. Which of the following expression is not a Polynomial? a. -5x² b. 2xy c. 3x−3 d. √8 xy³ ____6. Which of the following polynomials has two terms? a. 2xyz b. 2xy – 4xyz + 3 c. 4xy + 5y d. 4xy 5 ____7. What is the degree of the polynomial 5a3b2c2? a. 2 b. 3 c. 7 d. 9 ____8. Which of the following is not an example of a monomial? a. 2xyz b. 5y c. 2xy – 4xyz + 3 d. 4xy 5+6 ____9. If a=4 and b=3, what is the value of a – b? a. 7 b. −7 c. 1 d. -1 ____10. What is the value of the expression 2x + y – 6 when x = 2 and y = 3? a. -7 b. -2 c. 1 d. 7 ____11. What is the sum of 8mn and 5mn ? a. ⁻ 3m2n2 b. 13mn c. 3m2n2 d. -3mn ____12. (5x3 + x2 + 2) + (4x3 + 6x2) a. -9x3 + 7x2 + 2 b. 9x3 + 7x2 + 2 c. 9x3 - 7x2 + 2 ____13. The base of an isosceles triangle has length x + 4. The two legs of the triangle have lengths 3x + y. Write an expression for the perimeter of the triangle. a. 2x + 7y + 4 b. 7x + 2y + 4 c. 4x + 2y + 4 ____14. What is the difference between 15mn and 8mn ? a. 23m2n2 b. 7mn c. 7m2n2 d. 23mn ____15. (6x2 + 6x + 13) ─ (3x 2 + 2x + 4) a. x 2 + x + 9 b. 3x 2 + 4x + 9 c. 9x 2 + 8x + 17​