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Pani-rosa [81]
2 years ago
9

Solve by substitution I NEED STEP BY STEP 7x-y=34 2x+3y=-10

Mathematics
1 answer:
DochEvi [55]2 years ago
6 0

Answer:

(4, - 6 )

Step-by-step explanation:

7x - y = 34 ( multiply through by - 1 )

- 7x + y = - 34 ( add 7x to both sides )

y = 7x - 34 → (1)

2x + 3y = - 10 → (2)

substitute y = 7x - 34 into (2)

2x + 3(7x - 34) = - 10

2x + 21x - 102 = - 10

23x - 102 = - 10 ( add 102 to both sides )

23x = 62 ( divide both sides by 23 )

x = 4

substitute x = 4 into (1)

y = 7(4) - 34 = 28 - 34 = - 6

solution is (4, - 6 )

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svetoff [14.1K]
500/66= 7.6
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3 0
3 years ago
The perimeter of a rectangle is dependent on the length of each of its sides. Suppose the base of a rectangle is two more than i
Bezzdna [24]
Perimeter=4h+4

If the base is 2 more than the height, it gives us the equation:
b=h+2

The equation for the perimeter of a rectangle can be though of as 2b+2h, so substituting in (h+2) for b from the first equation, we get 2(h+2)+2h.

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4 0
3 years ago
(28÷4)+3+6x5<br><br><br> tell accordingly the correct answer will be marked as brainliest answer
Anvisha [2.4K]
The answer to this expression is 40. Why? Well, we can use PEMDAS in this expression.

P: Parenthesis

So this is our first step:

28 / 4 = 7

Next step: Simplify.

7 + 3 + 6 x 5

Then: E stands for Exponents but we have none so we can move on.

M stands for Multiply so we have our next step:

6 x 5 = 30

Now: Simplify.

7 + 3 + 30

Now that we have a simple equation, we can add the values to get our answer.

7 + 3 = 10
10 + 30 = 40

Therefore, your answer is 40. Whenever you see problems like this, be sure to use PEMDAS for a faster and more accurate evaluation.


Your final answer: 40.
3 0
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Evaluate the statement “W must be at –3.”
jekas [21]
I think this mean that in whatever equation you have, w must be representing -3. Not sure though :)
7 0
4 years ago
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Goshia [24]

Answer:

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Step-by-step explanation:

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7 0
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