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nydus/The First Steps in AlgebraPublic

Page 17 of 227

Table of Contents

PARENTHESES.

$9 a$ .

$8 a b$ .

$4 b^{2} c$ .

$2 a^{2}$ .

$3 c^{3}$ .

$2 b^{4}$ .

$5 a c$ .

$a b c$ .

$a b c^{2}$ .

$\frac{1}{3} a b c$ .

$\frac{1}{5} a b^{2} c$ .

$\frac{1}{7} a^{2} b c$ .

If $a = 5$ , $b = 2$ , $c = 0$ , $x = 1$ , $y = 3$ , find the value of

$4 a c y^{2}$ .

$3 a x^{5} y^{2}$ .

$2 a b^{2} y$ .

$2 a^{2} b^{2} c^{2} y^{2}$ .

$2 a^{2} b^{2} x^{2} y^{2}$ .

$2 a b x^{3} y^{3}$ .

$3 a b c x y$ .

$3 a b x^{3} y^{2}$ .

$3 a b^{2} x y^{2}$ .

41. The Numerical Value of a Compound Expression.

If $a$ stands for $10$ , $b$ for $4$ , and $c$ for $3$ , find the value of the expression $5 a b - 10 c^{2} - 5 b^{2}$ .

Find the value of each term, and combine the results.

$& ∴ 5 a b - 10 c^{2} - 5 b^{2} & = 200 - 90 - 80 & = 30 .$

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