Chapter 4: Problem 52
Find the rate of change between the two points. Give the units of measure for the rate. \((2,2)\) and \((9,23) ; x\) in minutes, \(y\) in inches
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CRITICAL THINKING Do you think there is a relationship between the number of songs and the number of minutes on a CD? Explain your reasoning. How could you test whether there is a relationship?
They can be used to estimate the average number of hours \(h\) per week that a household in the United States watches television programs. In all three models, \(t\) is the number of years since \(1985 .\) Hours spent watching television: \(h=0.57 t+54.85\) Hours spent watching talk shows: \(\quad h=0.35 t+4.06\) Hours spent watching game shows: \(h=-0.2 t+3.4\) According to the model, in what year will the average number of hours per week that a household watches game shows be zero?
Find the difference. $$ 7-|-1| $$
Find the sum or the difference of the matrices. $$ \left[\begin{array}{rr}4 & -8 \\\7 & 0\end{array}\right]-\left[\begin{array}{rr}-5 & 3 \\\\-5 & -7\end{array}\right] $$
Is the given number a solution of the inequality? $$4 x-1>10 ; 3$$
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