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dexar [7]
3 years ago
9

Can someone help me with this one

Mathematics
1 answer:
astra-53 [7]3 years ago
5 0

Answer:

79,200

158,400

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The perimeter of a rectangle is 36m. If its length is increased by 1m and the width is increased by 2m, its area will increase b
maw [93]

Answer:

  80 m^2

Step-by-step explanation:

The given information lets you write two equations involving length (x) and width (y).

  • 2(x +y) = 36 . . . . the perimeter is 36 m
  • (x+1)(y+2) -xy = 30 . . . . increasing the length and width increases area

The second of these equations simplifies to another linear equation, giving a system of linear equations easily solved.

  xy +y +2x + 2 -xy = 30

  2x +y = 28 . . . . . . . subtract 2

Dividing the first equation by 2 gives

  x +y = 18

and subtracting this from the above equation gives ...

  (2x +y) -(x +y) = 28 -18

  x = 10

Then

  y = 18 -10 = 8

The area of the original rectangle is xy = 10·8 = 80 m^2.

4 0
3 years ago
Seven subtracted from the quotient of a number and 2 is -6
Pachacha [2.7K]
N/2 -7 = -6

add 7 to both sides;
n/2 -7+7 = -6+7

n/2 = 1
multiply both sides by 2 (  or divide by 1/2 ) in order to get n by itself.

n/2 * 2/1 = 1 * 2/1

n = 2
5 0
3 years ago
Read 2 more answers
Find the measure of each<br> angle in the isosceles<br> trapezoid.<br> D<br> A<br> 136⁰<br> B<br> с
icang [17]

Answer:

b=136, c=44, d=44

Step-by-step explanation:

B is the same measure as A. C = D and A+B+C+D=360; C+D=88; C=44; D=44

3 0
2 years ago
if it takes 2 people 8 hours to decorate a room. How many people do I need to decorate 15 rooms in 24 hours?
miss Akunina [59]
6 people l guess l hope this helps
6 0
3 years ago
Latisha worked for six hours and 45 minutes how should she write that on her time card
AlexFokin [52]

Answer:

Hey there!

6 hrs 45 mins =  405 mins, or 6.75 hours.

Hope this helps :)

8 0
3 years ago
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