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Magazine Problem 94
Use a graphing calculator to estimate the solution to each equation to two decimal places. Then find the solution algebraically and compare it with your estimate. $$-2.46 x+1500=0$$
Problem 94
Recall that \(\sqrt{w}\) is a real number only if \(w \geq 0\) and \(1 / w\) is a real mumber only if \(w \neq 0 .\) For what values of \(x\) is each of the following expressions a real mumber? $$\frac{5}{\sqrt{3-2 x}}$$
Problem 94
Solve each equation. $$9-|2 x-3|=6$$
Problem 95
Recall that \(\sqrt{w}\) is a real number only if \(w \geq 0\) and \(1 / w\) is a real mumber only if \(w \neq 0 .\) For what values of \(x\) is each of the following expressions a real mumber? $$\sqrt{|x|-3}$$
Problem 95
Use a graphing calculator to estimate the solution to each equation to two decimal places. Then find the solution algebraically and compare it with your estimate. $$0.03 x-3497=0$$
Problem 95
Perform the indicated operations. Write the answers in the form \(\bar{a}+b i\) where \(a\) and \(b\) are real mumbers. $$i^{5}\left(i^{2}-3 i\right)$$
Problem 95
Solve each equation. $$9-4|2 x-3|=9$$
Problem 95
Use a graphing calculator to solve each problem. Graph \(y_{1}=(x-5) / 3\) and \(y_{2}=x-0.67(x+4.2) .\) Do the lines appear to be parallel? Are the lines parallel?
Problem 96
Use a graphing calculator to estimate the solution to each equation to two decimal places. Then find the solution algebraically and compare it with your estimate. $$0.09 x+2000=0$$
Problem 96
Perform the indicated operations. Write the answers in the form \(\bar{a}+b i\) where \(a\) and \(b\) are real mumbers. $$3 i^{7}\left(i-5 i^{3}\right)$$
