Mathematics, 27.01.2020 08:31 zayrasanatana13

Can someone answer these for me? ill give brainliest, i really need to finish : (
(substitution method)

1) -8x+2y=-4
y=-3x-2

2) 12x-3y=4
y=4x

3) 3x+2y=11
x+2y=9

4) -3+2y=5
-4x+y=10

Answers: 2

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Answers

Answer from: hokamidat

Step-by-step explanation:

-8x + 2y = -4 12x - 3y = 4

y = -3x - 2 y = 4x

sub sub

-8x + 2(-3x - 2) = -4 12x - 3(4x) = 4

-8x - 6x - 4 = -4 12x - 12x = 4

-14x = -4 + 4 0 = 4

-14x = 0 NO SOLUTION

x = 0

y = -3x - 2 -3 + 2y = 5

y = -3(0) - 2 -4x + y = 10...y = 4x + 10

y = -2 sub

solution is : (0,-2) -3 + 2(4x + 10) = 5

-3 + 8x + 20 = 5

3x + 2y = 11 8x + 17 = 5

x + 2y = 9...x = 9 - 2y 8x = 5 - 17

sub 8x = - 12

3(9 - 2y) + 2y = 11 x = -12/8

27 - 6y + 2y = 11 x = -3/2

-4y = 11 - 27

-4y = -16 y = 4x + 10

y = -16/-4 y = 4(-3/2) + 10

y = 4 y = -12/2 + 10

y = -6 + 10

x = 9 - 2y y = 4

x - 9 - 2(4) solution (-3/2,4)

x = 9 - 8

x = 1

solution : (1,4)

Answer from: Quest

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column

Answer from: Quest

slope is 35 and 20 miles is the y-intercept.

step-by-step explanation:

Can someone plz answer this question for me, i will give brainliest for who ever answers !

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Can someone answer these for me? ill give brainliest, i really need to finish : (
(substitut...

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