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3 years ago

Is anyone good at elimination method? I will give 10 points to the person that answer the question. :)

2 answers:

8 0

To eliminate x, the coefficients of x's in both equations should be opposite numbers. Since the coefficient of x in the second equation is 3, the coefficient in the first equation should be -3. So she should multiply the first equation by -3.

Anna [14]3 years ago

8 0

-3!
-3y=-3x-24
y=3x-11
-2y=-35
y=17.5

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3 years ago

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The rectangle shown has a perimeter of 48 cm and the given area. Its length is 6 more than twice its width. Write and solve a sy

melamori03 [73]

Answer:

The length of the rectangle is 18 cm

The width of the rectangle is 6 cm

Step-by-step explanation:

Let

x-----> the length of the rectangle

y----> the width of the rectangle

we know that

The perimeter of the rectangle is

$P=2(x+y)$

we have

$P=48\ cm$

$48=2(x+y)$ ------> equation A

$x=2y+6$ ------> equation B

Substitute equation B in equation A and solve for y

48=2(2y+6+y)

48=2(3y+6)

48=6y+12

6y=48-12

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Find the value of x

x=2(6)+6=18 cm

The area of the rectangle is

A=xy

A=18*6

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3 years ago