91Ó°ÊÓ

Write an algebraic expression to represent each verbal expression.

Four times the sum of a number and 5

dog run in his yard. He wants the length to be 2.5 feet

more than the width. Find the length, L, by solving the

equation 2L + 2(L − 2.5) = 74.

Stamps Paula bought $22.82 worth of 49-cent

stamps and 21-cent stamps. The number of 21-cent

stamps was eight less than the number of

49-cent stamps. Solve the equation

0.49s + 0.21(s − 8) = 22.82 for s, to find the number

of 49-cent stamps Paula bought.

Find the coordinates of the vertices of the figure formed by each system of inequalities.

$\begin{array}{c}8.y≤x\\ yâ‰\yen −3\\ 3y+5x≤16\end{array}$

Find the coordinates of the vertices of the figure formed by each system of inequalities.

$\begin{array}{c}yâ‰\yen x−3\\ y≤x+7\\ x+y≤11\\ x+yâ‰\yen −1\end{array}$