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yuradex [85]
3 years ago
11

How to solve a system of equations using elimination?

Mathematics
1 answer:
Nastasia [14]3 years ago
5 0
If  you have a problem like: 
4x+2y=20
2x+2y=16
 You would subtract
4x-2y=20
-2x+2y=16
You would get the new problum
2x=4
You now want to divide the 2 on both sides to solve for x
x=2

Now that you've solved for X you want to solve for y. So use substitution to solve for y. You would want to substatute the x for the 2 in either of the problums. I'll use the first one.
4(2)+2y=20

You first want to multiply te 4(2) you would get a new problum.
8+2y=20

Now you want to subtract the 8 on both sides.
2y=12

The last step to solve for y is to divide the 2 on both sides.
Y=6

So your answers would be
x=2
y=6


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A number greater than 40 and have 5 in the tenths place
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svetoff [14.1K]

Answer:

The third partner owns 7/20

Step-by-step explanation:

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WILL GIVE BRAINLEST!!! solve the triangle and answers to the nearest tenth.
sineoko [7]

Answer:

Angle A is 29 degress Angle B is 61 Angle C is 90

Side AB is 5.8 Side BC is 2.8 and  Side AC is 5.1

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b/sin b= c/sin c

x/sin 61= 5.8/sin 90( which equal 1)

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I found side BC by using pythagoren theorem.

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What is 18/90 is simplest form
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220 students were asked if they liked chocolate or vanilla ice cream. 140 said they liked chocolate and 120 said they liked vani
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Answer: D. 40

Step-by-step explanation:

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Now,  Number of students liked vanilla and chocolate ice cream is given by :-

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Number of students liked vanilla and chocolate ice cream= 40

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3 years ago
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