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sammy [17]
3 years ago
11

Amira is painting a rectangular banner 2 1/4 yards wide in the cafeteria. The banner will have a blue background. Amira has enou

gh blue paint to cover 1 1/2 square yards of wall. Find the height of the bannerif Amira uses all of the blue paint. Show your work.
Mathematics
2 answers:
AfilCa [17]3 years ago
7 0
The  height of the bannerif Amira uses all of the blue paint is 2/3. Below is is the solution:

Area = h x w 
1 1/2 = h x 2 1/4
3/2 = h x 9/4 
h = 3/2 / 9/4 
h = 3/2 x 4/9
h = 2/3
Dominik [7]3 years ago
4 0

we know that

the area of the rectangular banner is equal to

A=W*h

where

W is the wide of the banner

h is the height of the banner

in this problem

W=2\frac{1}{4} \ yards=\frac{(4*2+1)}{4} =\frac{9}{4} \ yards

A=1\frac{1}{2} \ yards^{2} =\frac{(1*2+1)}{2} =\frac{3}{2} \ yards^{2}

In the formula of the area solve for h

A=W*h\\ \\ h=\frac{A}{W}

Substitute the values of W and A

h=\frac{\frac{3}{2}}{\frac{9}{4}}  \\ \\ h=\frac{2}{3} \ yards

therefore

the answer is

the height of the banner is \frac{2}{3} \ yards

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