Chapter 7: Problem 49
Solve the equation. $$ 21=7(w-2) $$
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Use the following information. A carpenter is buying supplies for a job. The carpenter needs 4 sheets of oak paneling and 2 sheets of shower tileboard. The carpenter pays 99.62 dollars for these supplies. For the next job the carpenter buys 12 sheets of oak paneling and 6 sheets of shower tileboard and pays 298.86 dollars. Could you find how much the carpenter is spending on 1 sheet of oak paneling? Explain.
Use the graphing method to solve the linear system and tell how many solutions the system has. $$ \begin{aligned}&x+y=8\\\&x+y=-1\end{aligned} $$
Use the substitution method or linear combinations to solve the linear system and tell how many solutions the system has. $$ \begin{aligned}&-6 x+2 y=-2\\\&-4 x-y=8\end{aligned} $$
Evaluate the expression. \(3 \cdot 3 \cdot 3 \cdot 3 \cdot 3\)
Use the description shown below. "Choose any number Add 10 to the number. Multiply the result by 2 Subtract 18 from the result. Multiply the result by one half Subtract the original number." Write a linear equation for the description. Let \(x\) represent the number that is chosen and let \(y\) represent the final result.
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