18. What must be subtracted from 3x + y to produce x – 6y?
a. X + 4y
b. 2x + 7y
c. 3x – 6y
d. 4x – 5y
19. Which expression is equivalent to x . x2?
a. X⁰
b. X
c. X²
d. X³
20. What is the difference of 10x + 3 and
x – 1?
a. 11x + 2
b. 9x +4
c. -11x + 2
d. -9x + 2
21. What is the value of the expression
(3x²y³)⁰?
a. 0
b. 1
c. 2
d. None of these
22. Simplify ( 2/3 )³
a. 8/27
b. 6/9
c. 6/27
d. 8/9
23. Translate 2x + 5 = 10 into mathematical sentence.
a. The difference of twice a number and five is ten.
b. The sum of twice a number and five is ten.
c. The product of twice a number and five is ten.
d. The quotient of twice a number and five is ten.
24. What is the perimeter of a square if the side is (a + 2) m?
a. (4a + 2) m
b. (4a + 4) m
c. (4a + 6) m
d. (4a + 8 ) m
25. In the given expression 3x – 2y, if x = 5, what must be the value of y so that the given expression will be equal to 21?
a. – 3
b. – 2
c. 2
d. 3