Perform the indicated subtraction.-7 - (-7)
A. 1
B. 14
C. -14
D. 0
Answer: D
Mathematics
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Graph.5x2 + 25y2 = 225 
A. 
B. 
C. 
D. 
Mathematics
Evaluate the expression according to the order of operations.72 - 3 ? 4
A. 112 B. 64 C. 37 D. 184
Mathematics
Use a graphing calculator to solve the system of equations. Round your solutions to one decimal place.1.8x + 2.8y - 5.0z = 4.24.7x - 6.7y + 0.7z = -2.33.2x - 4.5y + 3.8z = 8.2
A. {(17.8, 15.1, 11.5)} B. {(22.2, 18.8, 14.3)} C. {(8.9, 7.5, 5.7)} D. {(4.4, 3.8, 2.9)}
Mathematics
Solve the problem.The graphs below represent the supply and demand for a product at various prices per unit. At what price does supply equal demand?
A. $900 B. $650 C. $400 D. $177
Mathematics