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sweet [91]
4 years ago
5

Helppppp and explain pls and thankyouuu

Mathematics
1 answer:
NARA [144]4 years ago
3 0

Answer:

third option (7.5, 8)

this option (6, 5, -3)

Step-by-step explanation:

you eliminate one variant by expressing it through the other(s) until you have one equation with one variable.

that you solve, and then you go back to the other elimination expressions to calculate the others.

2x - y = 7

-2x + 3y = 9

since the terms with x are already so similar, we could now simply add both equations and solve that result :

2x + (-2x) -y + 3y = 7+9 = 16

0×x + 2y = 16

2y = 16

y = 8

=>

2x - 8 = 7

2x = 15

x = 7.5

x - 2y - 3z = 5

x + 2y + 3z = 7

x + z = 3

the same trick by adding the first 2 equations

x + x -2y + 2y -3z + 3z = 5 + 7 = 12

2x + 0y + 0z = 12

2x = 12

x = 6

=>

6 + z = 3

z = -3

and then

6 + 2y + 3(-3) = 7

6 + 2y - 9 = 7

2y - 3 = 7

2y = 10

y = 5

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djyliett [7]
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I hope this helped!
3 0
3 years ago
The moon is about 240,000 miles from earth . What is the distance written as a whole number multiplied by a power of ten
Andreyy89

For this case we have the following number:

240,000

What we must do is rewrite the number as the product of two numbers.

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From here, we write the number as the multiplication of a whole number and a power of base ten.

We have then:

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10 ^ 4: power of base 10

Answer:

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(24) (10 ^ 4)

3 0
3 years ago
Read 2 more answers
If a car goes around a turn too quickly, it can leave tracks that form an arc of a circle. By finding the radius of the circle,
Sveta_85 [38]
I just encountered this question. Here's my answer. 

Given:
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Will give Brainliest if you get it right
fenix001 [56]

Answer:

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Step-by-step explanation:

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3 years ago
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Akimi4 [234]

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2

Step-by-step explanation:

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