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Chapter 4: Problem 31
$$ 650, a, 1550,1750,2300,2650 $$ If the mean of the list above is 1650 , what is the value of \(a\) ?
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A) NO CHANGE B) are sensing C) sense D) sensed
A) NO CHANGE B) cities C) citie's D) cities'
$$ \begin{aligned} & 1.3 x-0.6 y=-0.7 \\ & 6.5 x-1.5 y=-0.5 \end{aligned} $$ 26\. When two equations above are graphed in the \(x y\)-plane, there is a single solution at \((x, y)\). What is the \(y\)-coordinate of that solution? A) \(-1.33\) B) \(-1.125\) C) 2 D) \(3.25\)
If \(2 \sqrt{x}=x-3\), which of the following is the solution set for \(x\) ? A) \(\\{-1,9\\}\) B) \(\\{1,-9\\}\) C) \(\\{9\\}\) D) \(\\{1,9\\}\)
Steven needs to buy \(t\) theme park tickets for himself and his family. Each ticket costs $$\$ 80$$, and the number of tickets he needs to buy can be modeled by the expression \(t^2-4 t-90=6\) when \(t>0\). What is the total cost of the theme park tickets that Steven purchased? A) $$\$ 640$$ B) $$\$ 800$$ C) $$\$ 960$$ D) $$\$ 1,120$$ $$ \begin{aligned} & 2 c+3 d=17 \\ & 6 c+5 d=39 \end{aligned} $$
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