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Chapter 0: Problem 6
Evaluate each algebraic expression for the given value or values of the variable(s). $$x^{2}+5 x, \text { for } x=6$$
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Find the union of the sets. $$\\{1,3,7,8\\} \cup\\{2,3,8\\}$$
Fill in each box to make the statement true. $$\sqrt{x}=5 x^{7}$$
Determine whether each statement in Exercises 43鈥�50 is true or false. $$-\pi \geq-\pi$$
Rewrite each expression without absolute value bars. $$|300|$$
Your local electronics store is having an end-of-the-year sale. The price on a plasma television had been reduced by \(30 \% .\) Now the sale price is reduced by another \(30 \%\). If \(x\) is the television's original price, the sale price can be modeled by $$(x-0.3 x)-0.3(x-0.3 x)$$ a. Factor out \((x-0.3 x)\) from each term. Then simplify the resulting expression. b. Use the simplified expression from part (a) to answer these questions. With a \(30 \%\) reduction followed by a \(30 \%\) reduction, is the television selling at \(40 \%\) of its original price? If not, at what percentage of the original price is it selling?
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