# Thread: expressing decimals; evaluating expressions; simplifying

1. ## expressing decimals; evaluating expressions; simplifying

1) Write each decimal using negative exponents:

. . .a) 0.1
. . .b) 0.01
. . .c) 0.0001
. . .d) 0.00001

2) Evaluate each expression if w = -2, x = 3, and y = -1:

. . .a) x - 4
. . .b) w - 7
. . .c) 8w
. . .d) (xy) - 6

3) Use Product of Power and Quotient of Power rules to simplify each expression:

. . .a) x - 2 x x - 3
. . .b) r - 5 x r 9
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Edited by stapel -- Reason for edit: formatting, legibility

When you reply, please show all of your work and reasoning so far. For instance, the decimals are pretty simple: just convert, using what you've learned about scientific notation. The evaluation is pretty simple: plug the values in for the letters, and simplify. The simplification might be a little difficult, but we can't find where you're having trouble until we can see what you've tried.

Eliz.

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