a. Okay. So Reese has money to buy 115 cm of framing, with the length being 18.5 cm long. The formula would be written like this: 115 = 2(18.5) + 2w.
b. Now, let’s solve the problem. 18.5 * 2 is 37. 115 - 37 is 78. The width could be 78 centimeters or less. In inequality form, it would be written as this: w <= 78.
c. Now, graph the solution by writing a few numbers on the number line. Counting by 2’s, write the even numbers 70-86 on the number line. Put a closed circle point on 78, and then draw the line to the left. Going left means numbers are smaller and a closed circle means the equation is less than or equal to. The number line interprets that the width for both sides can total 78 centimeters or less.
