Chapter 4: Problem 32
Perform each indicated operation. See Section \(1.3 .\) $$ (-12)^{2}+(-1)(2)-6 $$
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Chapter 4: Problem 32
Perform each indicated operation. See Section \(1.3 .\) $$ (-12)^{2}+(-1)(2)-6 $$
These are the key concepts you need to understand to accurately answer the question.
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Translating Solve. The difference of two numbers is \(5 .\) Twice the smaller number added to five times the larger number is \(53 .\) Find the numbers.
Solving systems involving more than three variables can be accomplished with methods similar to those encountered in this section. Apply what you already know to solve each system of equations in four variables. $$ \left\\{\begin{aligned} x+y &-w=0 \\ y+2 z+w &=3 \\ x &-z=1 \\ 2 x-y &-w=-1 \end{aligned}\right. $$
Can a system consisting of two linear equations have exactly two solutions? Explain why or why not.
Without graphing, determine whether each system has one solution, no solution, or an infinite number of solutions. See the second Concept Check in this section. $$ \left\\{\begin{array}{r} {x+y=3} \\ {5 x+5 y=15} \end{array}\right. $$
Solve each system. To do so, you may want to let \(a=\frac{1}{x}\) (if \(x\) is in the denominator) and let \(b=\frac{1}{y}\) (if \(y\) is in the denominator.) $$ \left\\{\begin{array}{l} {\frac{2}{x}+\frac{3}{y}=5} \\ {\frac{5}{x}-\frac{3}{y}=2} \end{array}\right. $$
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