Multiply. Assume all variables represent nonnegative real numbers. ? 

A. x4
B. 15x4
C.
D.

Answer: B

Mathematics

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Solve the system of equations graphically using a graphing calculator. Find all values to the nearest tenth.y = x2 + 1-4y = 4x - 5

A. No solution B. x = -2.1, y = 3.4; x = 1.1, y = 0.2 C. x = -1.2, y = 2.5 D. x = -1.2, y = 2.5; x = 0.2, y = 1.1

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Mathematics

Simplify by taking the roots of the numerator and the denominator. Assume all variables represent positive numbers.

A. 6x 
B. 6x
C. 6x
D. x

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Mathematics

Solve the equation.x(x - 1) = 20

A. {-4, -5} B. {-4, 5} C. {4, -5} D. {4, 5}

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Mathematics

Tell whether the expression is a polynomial. If it is, give its degree.-8y4 - 

A. Polynomial; degree 2 B. Polynomial; degree -8 C. Polynomial; degree 4 D. Not a polynomial

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Mathematics