7. From the sum of 3x - 2y + 4z and 3y - 2z, subtract x-y-z.
A. x+y-Z
B. 2x + 2y + 32
C. 4x - 3y 52
D. 3x - 4y + 5z
8. What should be subtracted from 3x + 5y + 9 to get - 2x + 3y + 15?
A. 5x + 2y - 6
B. X + 7y - 24
C.-8x - 3y +7
D. - x+y - 5
9. When multiplying like bases, keep the base same and add the exponents.
A. True
B. False
C. Sometimes
D. Never True
10. Complete the statement below.
the exponent of a number says _______ to use the number in a multiplication."
A. add the exponents
B. minus the exponent
C. how many times
D. by another
11.simplify 25/23
A. 0
B. 1
C. 4
D. 9
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