Solve for the variable.
x - 
= -5
A. x = -21
B. x = 19
C. x = 21
D. x = -19
Answer: D
Mathematics
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Solve the problem.
=
A. 
B. 500
C. 
D. 501
E. 
Mathematics
Simplify. Assume that no radicands were formed by raising negative numbers to even powers.
A. (6k7q8)
B. (6q4)
C. (6k3q4)
D. (6k3q4)
Mathematics
Solve the problem.The pH of a solution ranges from 0 to 14. An acid has a pH less than 7. Pure water is neutral and has a pH of 7. The pH of a solution is given by 
where x represents the concentration of the hydrogen ions in the solution in moles per liter. Find the hydrogen ion concentration if the 
A. 0.08 B. 2.48 C. 1012 D. 10-12
Mathematics
If y varies directly as x, write a general formula to describe the variation.y = 6 when x = 16
A. y = 
x
B. y = 2x
C. y = x - 10
D. y = 
x
Mathematics