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Lemur [1.5K]
3 years ago
12

The rectangle shown has a perimeter of 86 cm and the given area. Its length is 7 more than three times its width. Write and solv

e a system of equations to find the dimensions of the rectangle
Mathematics
1 answer:
maxonik [38]3 years ago
8 0

Length = 34 cm

Width= 9 cm

Step-by-step explanation:

Let the width of the rectangle to be.........w

Length is 7 more than three times the width..........3w+7

Perimeter = 86 cm

Perimeter of a rectangle = 2(l+w)

Perimeter of the rectangle = 2 (w + 3w +7)

                                             = 2w +6w + 14

                                      86= 8w +14

                                       86-14 =8w

                                        72=8w

                                        72/8 =8/8w

                                          9=w

Width= 9 cm

Length = 3*9 + 7= 27+7 = 34 cm

Learn More

Perimeter of a rectangle :brainly.com/question/13220601

Keywords: rectangle,perimeter,length, equation, dimensions

#LearnwithBrainly

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Margarita [4]
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8 0
3 years ago
A limousine company charges a flat fee of $35 plus $2 per mile to ride a limousine. Write an equation in slope intercept-form wh
Anna35 [415]

Answer:

y=2x+35

Step-by-step explanation:

so y is what it's equal too so you put y=

then since its $2 every mile you put them next to eachother like

2x so y=2x

then there is just a plain fee of $35 so you add that to the equation which is what makes it look like

y=2x+35

Hope this helps!! :D

5 0
3 years ago
Lisa solved 3x2 + 1 = 28 as shown.
Alekssandra [29.7K]

x squared = 9  NOT x

x = square roots of 9 which is +3 or  -3.

4 0
3 years ago
Suppose the length and the width of the sandbox are doubled.
zalisa [80]

The percentage change in perimeter is 100%.

The percentage change in area is 300%

<h3>How to find perimeter and area?</h3>

The perimeter of the sandbox = 2l + 2w

where

  • l = length
  • w = width

Therefore,

perimeter = 2(10) + 2(6)

perimeter = 20 + 12 = 32 ft

The area of the sand box = lw

area = 10 × 6 = 60 ft²

If the length and width are doubled,

length = 2(10) = 20 ft

width = 2(6) = 12 ft

hence,

perimeter = 2(20) + 2(12) = 40 + 24 = 64 ft

area = 12 × 20 = 240 ft²

Therefore,

percentage change in perimeter = 64 - 32 / 32 × 100 = 100%

percentage change in area = 240 - 60 / 60 × 100 = 18000 / 60 = 300%

learn more on perimeter and area here: brainly.com/question/15322533

#SPJ1

3 0
2 years ago
PLEASE HELPP!!!
jarptica [38.1K]

Answer:

Reason 4. Division Property of Equality

Step-by-step explanation:

It should be Multiplication Property of Equality instead, which is:

If given a = b

then  a × c = b × c

5 0
3 years ago
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