Use the inverse of the coefficient matrix to solve the system of equations.5x + 7y = 3,2x + 3y = 10; A-1 = 
A. (-61, 44)
B. (-122, -112)
C. (-12, 56)
D. (61, -56)
Answer: A
Mathematics
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Evaluate. The differential is exact.
A. 0 B. -13 C. -12 D. -11
Mathematics
Complete the table using the formula.y = 
A. 
B. 
C. 
D. 
Mathematics
Determine the x values that cause the function to be (a) zero, (b) undefined, (c) positive, and (d) negative.f(x) = 
A. (a) {-9}, (b) 
, (c) (-?, -9) ? 
, (d) (-9, -2) ? 
B. (a) {-9}, (b) 
, (c) (-9, -2) ? 
, (d) (-?, -9) ? 
C. (a) 
, (b) {-9}, (c) (-?, -9) ? 
, (d) (-9, -2) ? 
D. (a) 
, (b) {-9}, (c) (-9, -2) ? 
, (d) (-?, -9) ? 
Mathematics
Write a fraction to represent the given information.What fraction of the fuel tank holds fuel? 
A. 
B. 
C. 
D. 
Mathematics