Solve the system using the addition method. 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. 7x - 5y = 20-4x + 3y = -12
A. (-1, -3)
B. ?
C. (0, -3)
D. (0, -4)
Answer: D
Mathematics
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Calculate the flux of the field F across the closed plane curve C.F = yi - xj; the curve C is the circle (x + 6)2 + (y - 8)2 = 100
A. -120 B. -240 C. 0 D. 120
Mathematics
Provide an appropriate response.The graph of the equation y = -4x2 + 9x - 10 opens 
.
A. downward B. to the right C. to the left D. upward
Mathematics
Write the number in scientific notation.0.000048612
A. 4.8612 × 10-4 B. 4.8612 × 10-5 C. 4.8612 × 105 D. 4.8612 × 104
Mathematics
Solve the problem.The area of a rectangular rug is 91 square feet and its perimeter is 40 feet. Find the dimensions of the rug.
A. 7 feet by 12 feet B. 8 feet by 12 feet C. 8 feet by 13 feet D. 7 feet by 13 feet
Mathematics