1. Simplify ((-2x^4y^7)/(x^5))^3. Assume all variables are nonzero.

A: (-8y^21)/(x^3)

2. Simplify 3x(5y + 4) - 2xy - 10x + 6x^2

A: 13xy + 2x + 6x^2 or 6x^2 + 13xy + 2x

3. Evaluate (2.0 x 10^-7)/(8.0 x 10^-9). Write the answer in scientific notation.

A: 0.25 x 10^2

4. Evlauate f(x) = 8 - 4x for f(0), f(1/2), and f(-2).

A: 8, 6, 16

1 answer

#3 is the correct value, but it is not scientific notation.

The others are ok.
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