Solve the problem.Aaron purchased a house for $157,750. Of the $157,750, he spent $31,550 upgrading the original design of the house. The upgrade cost 20% of what he spent for the house. Find the number of degrees on a circle that represent the cost of the upgrade.
A. 72°
B. 36°
C. 73°
D. 90°
Answer: A
Mathematics
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Solve the problem.It took 1950 J of work to stretch a spring from its natural length of 1 m to a length of 
. Find the spring's force constant.
A. 1462.5 N/m B. 487.5 N/m C. 3900 N/m D. 975 N/m
Mathematics
Factor the polynomial using the negative of the greatest common factor.-18x2 + 27
A. -9(2x2 - 3) B. 9(-2x2 + 3) C. -9(2x2 + 3) D. 9(-2x2 - 3)
Mathematics
Simplify the expression using positive exponents only.6-6/7 ? 6-1/7
A. -68/7
B. -6
C. 
D. 
Mathematics
Perform the indicated operations and simplify the result. Leave the answer in factored form.
A. 
B. 
C. 
D. 
Mathematics