Solve the system by substitution. If the system is inconsistent and has no solution, state this. If the system is dependent, write the form of the solution for any real number x. x + y = 47x + 7y = 28
A. (0, 0)
B. (2, 2)
C. Dependent, (x, -x + 4)
D. Inconsistent, ?
Answer: C
Mathematics
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Find all the first order partial derivatives for the following function.f(x, y) = 
A. 
= - 
; 
= - 
B. 
= 
; 
= 
C. 
= - 
; 
= - 
D. 
= - 
; 
= - 
Mathematics
Write the fraction in simplest form.
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.Each gallon of shingle stain covers 120 square feet. How many gallons are needed to cover 960 square feet?
A. 6 gallons B. 7 gallons C. 9 gallons D. 8 gallons
Mathematics
Write an equivalent fraction with the given denominator. 
= 
A. 2 B. 20 C. 6 D. 10
Mathematics