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sp2606 [1]
3 years ago
7

Solve the system of linear equations y = -2x + 19 y = x + 7

Mathematics
2 answers:
Gnesinka [82]3 years ago
5 0

Answer:

x=4, y=11

Step-by-step explanation:

y = -2x + 19

y = x + 7

Since both equations are equal to y, we can set them equal to each other

-2x + 19= x + 7

Add 2x to each side

-2x + 19+2x= x + 7+2x

19 = 3x+7

Subtract 7 from each side

19-7 = 3x+7-7

12 = 3x

Divide by 3

12/3 = 3x/3

4=x

Now find y

y=x+7

y = 4+7

y=11

max2010maxim [7]3 years ago
4 0

Answer:

x = 4

y = 11

Step-by-step explanation:

y = -2x + 19

y = x + 7

Put y as x + 7 in the first equation and solve for x.

x + 7 = -2x + 19

Add 2x and -7 on both sides.

x + 7 + 2x - 7 = -2x + 19 + 2x - 7

x + 2x = 19 - 7

Combine like terms.

3x = 12

Divide both sides by 3.

3x/3 = 12/3

x = 4

Put x as 4 in the second equation and solve for y.

y = 4 + 7

y = 11

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If f(x) = 11x – 5, then f^-1(x)=
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Answer: f^-^1(x)=\frac{x+5}{11}

Step-by-step explanation:

To find the inverse, you replace the x with y, and y with x.

x=11y-5                       [add 5 on both sides]

x+5=11y                       [divide both sides by 11]

\frac{x+5}{11} =y

f^-^1(x)=\frac{x+5}{11}

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I<br><br> Is x= -2 a solution to:<br> a.<br> 7X = -1<br> b. X* 14 = -28
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Step-by-step explanation:

-2 x 14 = -28

b is the answer

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If a ray bisects an angle, each newly formed angle measures 90 degrees.
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Answer:

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nignag [31]
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B: (x - 5i)^2
= (x  +   - 5i)(x +  - 5i)
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= x^2 + 5ix - 5ix - 25i^2
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= (x)(x) + (x)(- 15i) + (10i)(x) + (10i)(- 15i)
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Hope that helps!!!

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