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Taya2010 [7]
3 years ago
9

guys i need help with solving the system of equations and combining the equations. also show your work. the equations are x-4y=-

12 and 4x-y=12. i need the answer in coordinates. i only need help with 3 questions with this.
Mathematics
1 answer:
Firdavs [7]3 years ago
5 0
X-4y=-12
4x-y=12

eliminate y's
multily 2nd equaiton by -4 and add to top one

x-4y=-12
<u>-16x+4y=-48 +
</u>-15x+0y=-60

-15x=-60
divide both sides by -15
x=4
sub back
x-4y=-12
4-4y=-12
minus 4 both sides
-4y=-16
divide both sides by -4
y=4

x=4
y=4
(x,y)
(4,4)<u>
</u>
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What are the solutions to the equation 3(x – 4)(x + 5) = 0?
vesna_86 [32]
First you distribute the 3
(3x-12) (x+5)=0
then you set each equation equal to zero
3x-12=0 & x+5=0
then you solve for x
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7 0
3 years ago
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How to solve for axis of symmetry for y=(x+2)(x-4)
lianna [129]

Answer:

x = 1

Step-by-step explanation:

you can first find the two zeroes

that would be

x + 2 = 0

x - 4 = 0

x = {-2, 4}

then you average them

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5 0
2 years ago
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5x+11=-3x+35 i need help solve for x
vaieri [72.5K]

Answer:

x = 3

Step-by-step explanation:

Let's solve your equation step-by-step.

5x + 11 = -3x +35

Add 3x to both sides.

5x + 11 + 3x = -3x + 35 + 3x

8x + 11 = 35

Subtract 11 from both sides.

8x + 11 - 11 = 35 - 11

8x = 24

Divide both sides by 8.

\frac{8x}{8} = \frac{24}{8}

x = 3

So therefore, that is how you found your answer: x = 3


8 0
2 years ago
Whats 4 + 2 i forgot,<br> and whats 5 + 5 + 9 + 8 + 90+ 90 - 1000 i also forgot
Vlad [161]

Answer:

4 + 2 = 6

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Step-by-step explanation:

hope this helps ;)

have a great day!! <3

8 0
2 years ago
Five pounds of bananas cost $2.35. How much does it cost per pound?
andrezito [222]

Answer:

The answer is 0.47

Step-by-step explanation:

You can get this answer by doing division 5 divided by 2.35 and

then you get 0.47

6 0
3 years ago
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