Determine the values of x for which the radical expression is a real number. Express your answer as an inequality or write "all real numbers".
A. x ? 7
B. x ? -7
C. all real numbers
D. x ? 7
Answer: D
Mathematics
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Write the expression without parentheses.-(-9m + 7n - 6p)
A. 9m - 7n + 6p B. -9m + 7n + 6p C. 9m - 7n - 6p D. -9m + 7n - 6p
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Evaluate the algebraic expression for the given value or values of the variable(s).4x + 8;
x = 4
A. 32 B. 12 C. 8 D. 24
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Solve the system by using the inverse of the coefficient matrix. 2x1 - 6x2 = -6 3x1 + 2x2 = 13
A. (-2, -3) B. (2, 3) C. (-3, -2) D. (3, 2)
Mathematics
Use the properties of exponents to simplify the expression. Write with positive exponents.y5/9
A. y10/81 - 6y15/81 B. y5/2 - 6y5/3 C. y3/9 - 6y2/9 D. y7/9 - 6y8/9
Mathematics