Chapter 2: Problem 34
Find the opposite of the number. $$-3$$
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SIMPLIFYING EXPRESSIONS Simplify the expression by combining like terms. $$ -12 y+5 y $$
LEAVING A TIP In Exercises \(83-85\), use the following information. You and a friend decide to leave a \(15 \%\) tip for restaurant service. You compute the tip, \(T,\) as \(T=0.15 C,\) where \(C\) represents the cost of the meal. Your friend claims that an easier way to mentally compute the tip is to calculate \(10 \%\) of the cost of the meal plus one half of \(10 \%\) of the cost of the meal. Write an equation that represents your friend's method of computing the tip.
LOGICAL REASONING Decide whether the statement is true or false If false, rewrite the right-hand side of the equation so the statement is true. $$ 3(2+7) \stackrel{?}{=} 3(2)+7 $$
Evaluate the expression. $$ 25-\left[\frac{3}{10}(6 \cdot 5)-2\right] $$
Evaluate the expression. $$ 12 \cdot 9 \div 6-13.5 $$
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