Solve the system by elimination.-7x - 6y = -13-3x + 3y = -39
A. {(7, -6)}
B. {(6, -5)}
C. ?
D. {(7, -5)}
Answer: A
Mathematics
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Solve the equation.6y2 + 17y + 12 = 0
A. y = 
, 
B. y = - 
, - 
C. y = 
, - 
D. y = - 
, - 
Mathematics
Find the circumference of the circle. Use 3.14 or 
for ? as indicated.Find the circumference. Round the answer to the nearest tenth of a unit.
A. 50.2 mi B. 3215.4 mi C. 201.0 mi D. 100.5 mi
Mathematics
Solve the problem.A thermometer reading 
is placed inside a cold storage room with a constant temperature of 
If the thermometer reads 
in 11 minutes, how long before it reaches 
Assume the cooling follows Newton's Law of Cooling: U = T + (Uo - T)ekt.(Round your answer to the nearest whole minute.)
A. 63 minutes B. 22 minutes C. 4 minutes D. -20 minutes
Mathematics
Differentiate.f(x) = 
A. f'(x) = 
B. f'(x) = 
C. f'(x) = 
D. f'(x) = 
Mathematics