Express the radical in simplified form. Assume that all variables represent positive real numbers.

A. y2 - 7
B.
C. 7y2
D.

Answer: D

Mathematics

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Completely factor the expression. ? ?

A.
B.
C.
D.
E.

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Let x be a number. Translate the following into an expression or an equation, as appropriate, and then simplify the expression or solve the equation.Twice the difference of six and x is equal to six subtracted from negative one times x.

A. 2(6 - x) = -x - 6;  18 B. 2(x - 6) = 6 - x;  6 C. 2(6 - x) = -x - 6;  6 D. 2(6 - x) = -x - 6;  4

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Solve the problem. When appropriate, round the solution to the nearest tenth. As needed, use the formula Find the pH if the [H3O+] = 1.0 × 10-6.

A. 8 B. -8 C. 6 D. -6

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Perform the indicated operations. Simplify the result, if possible. +  + 

A.
B.
C.
D.

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Mathematics