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Andrew [12]
3 years ago
13

Math help will give brainliest what is X and M angle A

Mathematics
1 answer:
Anna [14]3 years ago
3 0
Supplementary = 180 degrees...

A + B = 180

3x + 12 + 7x + 38 = 180

10x + 50 = 180

10 x = 130

x = 13 

To find the A just substitute x in...

 
3 ( 13) + 12  

A = 51

To check substitute the x..

A + B = 180

3(13) + 12 + 7(13) + 38 = 180
        51 + 129 = 180
            180 = 180
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two fractions with different denominators have a sum of 7/12 what are two possible addends that results in this sum
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Suppose AP = 2 cm and BQ = 7 cm. What is the length of PC?
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Step-by-step explanation:

is this a quadrilateral? or polygon or triangle?

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SOLVE ALL THESE EQUATION BY USING THE METHOD SUBSTITUTION ALGEBRAICALLY HERE'S ARE ALL THE EQUATION:
pav-90 [236]

Answer:

See below ~

Step-by-step explanation:

<u>Question 1</u>

  • -7x - y = -1
  • y = 8x + 16

⇒ -7x - (8x + 16) = -1

⇒ -7x - 8x - 16 = -1

⇒ -15x = 15

⇒ x = -1

⇒ y = 8(-1) + 16 = 8

⇒ Solution = <u>(-1, 8)</u>

<u></u>

<u>Question 2</u>

  • 3x + 4y = 0
  • y = -3x - 18

⇒ 3x + 4(-3x - 18) = 0

⇒ 3x - 12x - 72 = 0

⇒ -9x = 72

⇒ x = -8

⇒ y = -3(-8) - 18 = 6

⇒ Solution = <u>(-8, 6)</u>

<u>Question 3</u> (not clear)

<u>Question 4</u>

  • -8x - 7y = 0
  • y = 6x

⇒ -8x - 7(6x) = 0

⇒ -8x - 42x = 0

⇒ -50x = 0

⇒ x = 0

⇒ y = 6(0) = 0

⇒ Solution = <u>(0, 0)</u>

<u>Question 8</u>

  • 2x - 6y = -14
  • y = -5x - 19

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⇒ 32x = -128

⇒ x = -4

⇒ y = -5(-4) - 19 = 1

⇒ Solution = <u>(-4, 1)</u>

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