A STORY OF UNITS Lesson 23 Problem Set

3.7

Mischa makes a 4 foot by 6 foot rectangular banner. She puts ribbon around the outside edges. The

ribbon costs $2 per foot. What is the total cost of the ribbon?

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W

What I know-

What I want to know-

Is there a Special condition?

Type here each banner is 4 by Type here how much it will cos Type here- $2 per ft

6 ft and its $2 per ft

for two

The ribbon will cost $ _40_

Math is

AWESOME!

$40 will be the total cost of the ribbon.

Step-by-step explanation:

To find the cost of ribbon to be put on the edges of rectangular banner, we need to:

1. Find the perimeter of the rectangle.

2. Multiply the perimeter with the per foot cost to find the total cost.

Let us find the perimeter first:

Perimeter of a rectangle is given as:

Here, the dimensions of rectangle are 4ft by 6ft.

So, perimeter =

It is given that per foot cost is $2.

Total cost of the ribbon =

$40 will be the total cost of the ribbon.

step-by-step explanation:

y = | -2(-2) |     →     y = | 4 |     →     y = 4       ⇒   (-2, 4)

y = | -2(-1) |     →     y = | 2 |     →       y =   2       ⇒   (-1, 2)    

y = | -2(0) |     →     y = | 0 |     →       y = 0         ⇒   (0, 0)

y = | -2(1) |   c →     y = | -2 |     →     y =   2         ⇒   (1, 2)    

y = | -2(2) |     →     y = | - 4 |     →     y =   4         ⇒   (2, 4)