91Ó°ÊÓ

Use the intersection-of-graphs method to approximate each solution to the nearest hundredth. $$-0.15(6+\sqrt{2} x)+1.4(2 \pi x-6.1)=10$$

Set the viewing window of your calculator to the given specifications. Make a sketch of your window. $$\begin{aligned} &[-40,40] \text { by }[-30,30]\\\ &\mathrm{Xscl}=5 \quad \mathrm{Yscl}=5 \end{aligned}$$

Solve each problem. Height of a Streetlight A person 66 inches tall is standing 15 feet from a streetlight. If the person casts a shadow 84 inches long, how tall is the streetlight?

Set the viewing window of your calculator to the given specifications. Make a sketch of your window. $$\begin{aligned} &[-5,10] \text { by }[-5,10]\\\ &\mathrm{Xscl}=3 \quad \mathrm{Yscl}=3 \end{aligned}$$

Find the equation of the line satisfying the given conditions, giving it in slope-intercept form if possible. Through \((-5,8),\) parallel to \(y=-0.2 x+6\)

Classify each equation as a contradiction, an identity, or a conditional equation. Give the solution set. Use a graph or table to support your answer. $$5 x+5=5(x+3)-3$$

Set the viewing window of your calculator to the given specifications. Make a sketch of your window. $$\begin{aligned} &[-3.5,3.5] \text { by }[-4,10]\\\ &\mathrm{Xscl}=1 \quad \mathrm{Yscl}=1 \end{aligned}$$

Classify each equation as a contradiction, an identity, or a conditional equation. Give the solution set. Use a graph or table to support your answer. $$5-4 x=5 x-(9+9 x)$$

Solve each problem. Hooke's Law If a 9.8 -pound weight stretches a spring 0.75 inch, how much weight would be needed to stretch the spring 3.1 inches?

Find the equation of the line satisfying the given conditions, giving it in slope-intercept form if possible. Through \((-4,-7),\) parallel to \(x+y=5\)