Find the solution to the system of equations by the substitution method.
A. (-5, 2)
B. (5, 2)
C. (-5, -2)
D. (5, -2)
Answer: D
Mathematics
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Solve the problem.Last year the hatch-back model of a new car cost $18,800. This year's model costs $21,985. How much more does this year's model cost?
A. $3185 B. $39,785 C. $40,785 D. $3085
Mathematics
Evaluate the expression.C(
, 
)
A. 1 B. 120 C. 60 D. 30
Mathematics
Solve the problem.A vertical right circular cylindrical tank measures 
high and
diameter. It is full of oil weighing 
. How much work does it take to pump the oil to the level of the top of the tank? Give your answer to the nearest ft ? lb.
A. 6,243,727 ft ? lb B. 52,031 ft ? lb C. 12,487,454 ft ? lb D. 3,121,863 ft ? lb
Mathematics
Solve.7y2 + 11 = 111
A. ± 
B. ±10
C. 
D. no real-number solutions
Mathematics