Use a graphing utility to find or approximate solutions to the equation. If necessary, round your answers to three decimal places.25y2 + 20y + 4 = 0

A. -0.4, -0.4
B. 0.4, -0.4
C. -0.08, -0.5
D. 0.4, 0.4

Answer: A

Mathematics

Determine whether the function is a solution of the wave equation.w(x, t) = ln -6cxt

A. Yes B. No

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Mathematics

Simplify.-(-7)

A. -7 B. -8 C. 0 D. 7

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Mathematics

Decide whether the composite functions, f ? g and g ? f, are equal to x.f(x) = x2 + 1 , g(x) = - 1

A. Yes, yes B. No, yes C. Yes, no D. No, no

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Mathematics

Convert 0.83 into a fraction.

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Mathematics