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Dominik [7]
2 years ago
5

Solve by using elimination. Express your answer as an Ordered pair (-x +2y=3 3x-2y=7

Mathematics
1 answer:
MAVERICK [17]2 years ago
4 0

Answer:

(5,4)

Step-by-step explanation:

-x+2y=3

3x-2y=7

Add the like terms( 2y and -2y)(-x and 3x)(3 and 7) together. Do this vertically. 2y and -2y cancel eachother out.

  • 2x=10

Divide both sides by 2

  • <u>x=5</u>

To find y, substitute x in for y in one of the equations

  • -5+2y=3

add 5 to both sides

  • 2y=8

Divide both sides by 2

  • <u>y=4</u>

Check:

  • -5+2(4)=3
  • 3=3
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Answer:

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Simplify: x(x-2)-3x(2x-1)
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Please help me!!
ipn [44]

{\color{chartreuse}{Measure\:of\: ∠\:on\: one\: side\:of\:line\:=\:180°}}

∠ Given are (x + 18)° , x° , 4x° and one Angle is 90° as per diagram

Let ,

1st∠ = (x + 18)°

2nd∠ = x°

3rd∠ = 4x°

so ,

⟶\:(x \:+\: 18)°\:+\:x°\:+\: 4x°\:+\:90°\:=\:180°

⟶\:6x°\:+ \:18°\:+\:90°\:=\:180°

⟶\:6x°\:+ \:108°\:=\:180°

⟶\:6x°\:=\:180°\:-\:108°

⟶\:6x\:=\:72°

⟶\:x\:=\:\frac{72}{6} \\

⟶\:x\:=\:12°

substituting x = 12 at the place of x .

= x° + 18°

= 12° + 18 °

1st∠ = 30°

__________________________________

= x°

2nd∠ = 12°

__________________________________

= 4x°

= 4(12)°

3rd∠ = 48°

7 0
2 years ago
Triangle JKL and Triangle MNO are similar triangles.
STALIN [3.7K]
We need to work out first the scale factor of the side length

Side MN correspond to the side JK

Side MN = 3.5 cm
Side JK = 14 cm

Scale factor = 14/3.5 = 4

Side OM correspond to side LJ
Side OM = 12 cm
Side LJ = 12 × 4 = 48 cm
4 0
3 years ago
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