Chapter 2: Problem 91
Evaluate the expression. $$ (27 \div 9) \div(7-5) $$
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SIMPLIFYING EXPRESSIONS Simplify the expression by combining like terms. $$ \frac{7}{9} w+\left(-\frac{2}{3}\right) w $$
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. Will both methods give the same results? Explain.
DISTRIBUTIVE PROPERTY Use the distributive property to rewrite the expression without parentheses. $$ -9(a+6) $$
Use the distributive property and mental math to simplify the expression. $$ 3 x^{2}+4 x+8-7 x^{2} $$
Write the verbal sentence as an equation or an inequality. Nine more than three fourths of \(y\) is less than six times \(w\)n.
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