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ivolga24 [154]
1 year ago
7

13. Solve the system of equation using substitution. 5x – 2y = 33 y = 7x – 39

Mathematics
1 answer:
mojhsa [17]1 year ago
4 0

Answer:

The correct answer is x=5

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PLEASE HELP!!!
jonny [76]

Answer:

Point A is located at (8,6)

Step-by-step explanation:

As I said in the last answer I did for u, (8,6) basically means x is 8 and y is 6. If you see A, A is located on 8 for x and 6 for y. the others are incorrect such as B because B is on the 8 for x but the y is on 8. hope this helps '∆'

7 0
3 years ago
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Can u help with these questions please
Drupady [299]
In the value of y problem, the answer is y = 26
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3 years ago
What is x=g/b2-4ac/2a
Alexandra [31]

Hello there!

the answer is x= 2g/b-2a to the power 2 c

8 0
3 years ago
Identify the problem with the following study. It was found that a third of all people in the United States live in urban center
Lyrx [107]
Small sample, because there needs to be more that just three people to determine if the study is true.
6 0
2 years ago
How many ml of a 20% acid mixture and a 80% acid mixture should be mixed to get 120ml of a 35% acid mixture?
shutvik [7]

Answer:

Volume of Mixture A =90 ml

Volume of Mixture B =30 ml

Step-by-step explanation:

Let say, Mixture A + Mixture B = Mixture C

Volume of Mixture A is x

Volume of Mixture B is y

So, Volume of Mixture C is x+y = 120 ml

Now, Acid contain in Mixture A is 20% =0.2x

Acid contain in Mixture B is 80% =0.8y

Also, Acid contain in Mixture C is 35% =(0.35)(x+y) = 0.35×120=42

Now, we know that,

Acid contain of Mixture A + Acid contain of Mixture B=Acid contain of Mixture C

∴ 0.2x+0.8y=42

∴ 2x+8y=420

We get two linear equations

2x+8y=420 and x+y = 120

Solving above equation...

∴ x=120-y

Replacing x value in 2x+8y=420

∴ 2(120-y)+8y=420

∴ 240-2y+8y=420

∴ 6y=180

∴ y=30

Replacing y value in any equation

∴ x=120-y=120-30=90

∴ x=90

Thus,

Volume of Mixture A is x=90 ml

Volume of Mixture B is y=30 ml

3 0
3 years ago
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