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DedPeter [7]
3 years ago
10

The length of a rectangle is 6.7 more than 2 times the width. If the perimeter of the rectangle is 57.2 cm, what are its dimensi

ons? Show all work.
A. Length=21.3 cm; width=7.3 cm

B. Length=7.3 cm; width=21.3 cm

C. Length=21.3 cm; width=14 cm

D. Length=7.9 cm; width=14 cm
Mathematics
2 answers:
Natasha2012 [34]3 years ago
6 0
The answer is going to be a. hope that helped
Gemiola [76]3 years ago
5 0
From the description, you can get two equation that looks like this:

L= 2*W+6.7cm
Perimeter= 57.2cm

Using perimeter formula, you can put the first and second equation like this:

perimeter= 2L + 2W
57.2cm= 2(2*W+ 6.7)+2W
57.2cm= 4W+ 13.4+ 2W
57.2- 13.4= 6W
W= 43.8/6= 7.3 cm

L= 2W+ 6.7
L= 2*7.3 + 6.7= 21.3
Answer: <span>A. Length=21.3 cm; width=7.3 cm</span>
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Answer:  The cost of one rose bush is $7 and the cost of one shrub is also $7

Step-by-step explanation:

The situtation can be represented by the systems of the equations.

10x + 4y  =  98   x in this case is the cost of  one rose bushes

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Solve the system of equation using the elimination method.

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9x + 9y = 126     eliminate the y variable so you will have to multiply 9 on top                                          and -4 down.

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You will now have the new two systems of equations

90x +36y = 882

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Now we know that the cost of one rose bush is 7 so we will plot it into one of the equations and solve for the cost of one shrub.

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so one rose bush is actually 7 dollars the same as 1 shrub.

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