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4 years ago

2x - 7y = 2 and 3x + y = -20 addition/elimination

Mathematics

1 answer:

Mkey [24]4 years ago

6 0

Answer:

x = -6, y = -2

Step-by-step explanation:

2x-7y = 2

3x + y = -20

We need to cancel out either x or y to solve the equation. I'll cancel out x first

3(2x-7y = 2)

-2(3x+y=-20)

___________

6x-21y = 6

-6x -2y = 40

____________

-23y = 46

y = -2

Plug the value for y in one of the 2 equations to solve for x

2x -7(-2) = 2

2x+14=2

2x = -12

x=-6

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7x = 94 whats the solution im sorry im bad at math

RSB [31]

I'm assuming you mean, what equals x.

Well, if 7x = 94, we know that 7 x's = 94.

Therefore, is you divide 94 by 7, you will get your answer.

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4 years ago

The histogram represents the time it takes employees to get to work each morning.

Archy [21]

Answer:

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Step-by-step explanation

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3 years ago

Read 2 more answers

If Logx (1 / 8) = - 3 / 2, then x is equal to

snow_tiger [21]

Answer:

Let's solve!

Step-by-step explanation:

$logx^{\frac{1}{8} } = -\frac{3}{2}$

$then$

$10^{-\frac{3}{2}} = x^{\frac{1}{8} }$

$(10^{-\frac{3}{2} })^{8} = (x^{\frac{1}{8} })^{8}$

$x = 10^{3*4} = 10^{-12}$

$x= 10^{-12}$

If the equation looks like this, then it has the solution

$x= 10^{-12}$

Another answer is

√x = 2 or x = 4

I hope this helps!

For more help:

brainly.com/question/9719370

brainly.com/question/7126917

brainly.com/question/3505855

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4 years ago

What is the perimeter of a square whose diagonal is 3 square root 2? Show all work on how you got your answer

Alika [10]

Answer:

Step-by-step explanation:

Given: Diagonal of square= $3\sqrt{2}$

To find the perimeter of square, we need to find the length of sides of square.

∴ Using the formula of diagonal to find side of square.

Formula; $Diagonal= s\sqrt{2}$

Where, s is side of square.

⇒ $3\sqrt{2} = s\sqrt{2}$

Dividing both side by √2

⇒ $s= \frac{3\sqrt{2} }{\sqrt{2} }$

∴ $s= 3$

Hence, Length of side of square is 3.

Now, finding the perimeter of square.

Formula; $Perimeter= 4s$

⇒ $Perimeter= 4\times 3$

∴ $Perimeter= 12$

Hence, Perimeter of square is 12.

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4 years ago

Grade 7 Math 7. Can anyone help me answer this question? I want the correct answers. No, guessing.

algol13

Part one of your questions would be 1/20
Part two would be 1/20
Part three. Yes they are equal
Part four. None of them sense there equal

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3 years ago