Solve the system of equations by substitution, if a solution exists.
A. No solution
B. x = -2, y = 9
C. x = -2, y = 10
D. x = -3, y = 10
Answer: B
Mathematics
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Use the quadratic formula to find the exact solutions.x2 + 10x = -16
A. -2, 8 B. -2, -8 C. -8, 2 D. 2, 8
Mathematics
Solve.
= 
A. x = 72
B. x = 15
C. x = 20
D. x = 1
Mathematics
Decide whether the equation defines y as a function of x.y = -x
A. function B. not a function
Mathematics
Determine whether the argument is valid or invalid. You may compare the argument to a common form, if applicable, or use a truth table.If you eat well, you will be well.If you are well, you will be happy.? If you eat well, you will be happy.
A. Valid B. Invalid
Mathematics