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Alex777 [14]
2 years ago
7

Solve the system of linear equations by multiplying. Check the answer by graphing the system of equations. –2x + 2y = 10 -4x + 5

y = 27
Mathematics
1 answer:
kari74 [83]2 years ago
8 0

Answer:

x=2, y=7 (2,7)

Explanation:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

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What is the equation when y=5x+4 is reflected over the x-axis, y-axis & y=x?
tigry1 [53]

Answer:

A) y=-5x-4

B) y=-5x+4

C) y=\frac{x-4}{5}

Step-by-step explanation:

So we have the equation:

y=5x+4

Let's write this in function notation. Thus:

y=f(x)=5x+4

A)

To flip a function over the x-axis, multiply the function by -1. Thus:

f(x)=5x+4\\-(f(x))=-(5x+4)

Simplify:

-f(x)=-5x-4

B) To flip a function over the y-axis, change the variable x to -x. Thus:

f(x)=5x+4\\f(-x)=5(-x)+4

Simplify:

f(-x)=-5x+4

C) A reflection over the line y=x is synonymous with finding the inverse of the function.

To find the inverse, switch x and f(x) and solve for f(x):

f(x)=5x+4

Switch:

x=5f^{-1}(x)+4

Subtract 4 from both sides:

x-4=5f^{-1}(x)

Divide both sides by 5:

f^{-1}(x)=\frac{x-4}{5}

And we're done :)

7 0
3 years ago
Plz help i will mark brainlist
iragen [17]
Y=x+4
3x+Y=-8

3x+x+4=-8
X=-3. Substitute the value of x


Y=-3+4
Y=1

(X,Y)= (-3,1)

So the answer is C
6 0
3 years ago
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Solve
polet [3.4K]

Answer:

3

4

5

9

2

Step-by-step explanation:

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3 years ago
Alexander purchased a computer on sale. The regional price was $1200. The sale price was 5/6 of the original price. How much did
mel-nik [20]
5/6 * 1200/1 = 6000/6
6000/6 = 1000
Alexander pay $1000 for the computer.
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3 years ago
Lenora buys 3.7 pounds of potatoes that cost $0.29 per pound. How much does Lenora pay for the potatoes. Round to the nearest ce
kap26 [50]
If it is 29.cents the awnser should be 30 cants
7 0
2 years ago
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