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Citrus2011 [14]
4 years ago
12

Solve system by substitution {y=-x+5 2x+y=11

Mathematics
2 answers:
Andru [333]4 years ago
4 0

Answer:

y = -1

x = 6

Step-by-step explanation:

y = -x + 5

2x + y = 11

then:

2x + (-x+5) = 11

2x - x + 5 = 11

x + 5 = 11

x = 11 - 5

x = 6

y = -x + 5

y = -6 + 5

y = -1

Check:

2x + y = 11

2*6 + (-1) = 11

12 - 1 = 11

sweet-ann [11.9K]4 years ago
3 0

Answer:x=6,y=−1

Step-by-step explanation:

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Hallar la ecuación de la recta que pasa por el punto P(-3,-1) y por el punto de intersección de las rectas 2x − y = 9 y 3x − 7y
adell [148]

Answer:

y = -1

Step-by-step explanation:

The standard form of equation of a line is y = mx+b

m is the slope

b is the y intercept

Get the coordinate of the point of interception of the line 2x - y = 9 and 3x - 7y = 19

Make y the subject of the formula in both expressions

For 2x  - y = 9

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y = 2x - 9

Similarly for 3x - 7y = 19

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7y = 3x - 19

y = 3/7 x - 19/7

Equating both expressions

2x - 9 = 3/7 x - 19/7

Multiply through ny 7

14x - 63 = 3x - 19

14x - 3x = -19 + 63

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x = 44/11

x = 4

Since y =2x - 9

y = 2(4) - 9

y = 8-9

y = -1

Hence the coordinate of intersection is at (4, -1)

Get the equation of the line passing through (-3, -1) and (4, -1)

Slope m = -1+1/4+3

m = 0/7

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Get the intercept

Substitute m = 0 and (-3, -1) into y = mx+b

-1 = 0(-3) + b

-1 = b

b = -1

Get the required equation

Recall that y = mx + b

y = 0x + (-1)

y = -1

Hence the required equation is y = -1

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3 years ago
Ill give brainliest to correct answer!!!!!!!
algol13
12 feet squared or 3 feet squared. hopefully this helps i got 2 different answers
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3 years ago
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Readme [11.4K]

Answer:

Translate from words to mathematical equation.

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m% = m/100

what = a variable ... "x". for example.

"is" means "="

"of" means multiply

n = (m/100)•x

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2 years ago
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