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igor_vitrenko [27]
3 years ago
12

P=2L +2W;P=32,W=7 25 16 12.5 9

Mathematics
1 answer:
Marianna [84]3 years ago
5 0

Answer:

L = 9

Step-by-step explanation:

Assuming you are trying to find L

P = 2L + 2W

P = 32

32 = 2L + 2W

W = 7

32 = 2L + (2 × 7)

32 = 2L + 14

2L = 32 - 14

2L = 18

L = 9

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Solve the proportional equation 3/r = 5/r+3
romanna [79]

Answer:

r=9/2 or 4.5

Step-by-step explanation:

First of all our goal is to get R by itself

by cross multiplying we get,

(r+3)*3=5r

by distributive property we get

3r+9=5r

substracting 3r from both sides we get

9=2r

by dividing by 2 in both sides we get

r=9/2 or 4.5

6 0
2 years ago
20. A rectangle has a length of x + 2 meters and a width of 2x - 5. (A.APR.1)
bija089 [108]

Answer:

A:

2(x + 2) + 2(2x - 5) =

2x + 4 + 4x - 10 =

6x - 6

perimeter = 6x - 6

B:

(x+2)(2x - 5)            expand the brackets:

2x² - 5x + 4x - 10

area = 2x² - x - 10

C:

area = 6x - 6 = (6 x 5) - 6 = 30 - 6 = 24

perimeter = 2x² - x - 10 = (2 x 5²) - 5 - 10 = (2 x 25) - 5 - 10 = 50 - 5 - 10 = 35

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6 0
3 years ago
Please help me with this :)
jolli1 [7]

Answer:

x ≤ 7/2 or x ≥ 13/2

5 0
3 years ago
Y varies inversely to x. If y = 7 when x = -4, what is y when x =5 ?
djverab [1.8K]

Answer:

Step-by-step explanation:

y*1/x

y=k/x where k is the constant of variation

when y=7, x=-4

7=k/-4

k=-28

when x=5

y=-28/5

note: * is used as symbol of variation

7 0
3 years ago
Pete played in two basketball games. He scored 4 fewer points in the second game than he scored in the first. He scored 12 point
kiruha [24]

Answer:

16

Step-by-step explanation:

12+4=16

12 being the number he scored in the second game, and four being the ones he added to said score in the first game.

8 0
3 years ago
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