What property of addition is used in the equality?(9 + 9) + 1 = 9 + (9 + 1)
A. Closure property
B. Commutative property
C. Additive-identity property
D. Associative property
Answer: D
Mathematics
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A. 
B. 
C. 
D. 
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Use a proportion to solve the problem.It takes 60 oz of grass seed to seed 3300 ft2 of lawn. At this rate, about how much would be needed for 
of lawn? Round to the nearest whole number.
A. 106 oz B. 107 oz C. 330,000 oz D. 109 oz
Mathematics
Draw the angle.135°
A. 
B. 
C. 
D. 
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Simplify the expression.9x + 2(x - 7)
A. 18x - 5 B. 11x + 14 C. 10x - 14 D. 11x - 14
Mathematics