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Studentka2010 [4]
3 years ago
8

Solve for y 2x + y = 7 6x + 9 = 9y - 2x

Mathematics
2 answers:
irga5000 [103]3 years ago
5 0

Answer:


Step-by-step explanation:

what grade are u in?


NeX [460]3 years ago
4 0
This is a simultaneous equation
1)2x+y=7
2)-8x+9y=9

1)*4 (so 2x becomes 8x so we can add or take to get rid of x)

1)8x+4y=28
2)-8x+9y=9

2) + 1)

13y=37

Y=2.846153846


To check the answer is correct find x

8x+(4*2.84...)=28
8x=28-11.384..
8x=16.615..
X=2.0769..


Input into 2)

(-8*2.07..)+(9*2.84..)=9
It is equal to 9
So y is correct



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Parallel lines need to have same slope
The lines have different slopes

It is false.
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48 gallons in 14 mins simplified
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5 0
3 years ago
What is the simplified form of the following expression? <br><br> ^3sqrt(4x/5)
Vladimir [108]

Answer:

= (∛(100x))/5

Step-by-step explanation:

Given the expression; ∛(4x/5)

To simplify this we need to make denominator a perfect cube.

So multiply and divide 25 inside the cube root, so that the denominator will become a perfect cube of 5.

∛(4x/5) = ∛((4x/5)×(25/25))

            = ∛(100x/125)

            = ∛(100x/5³)

            <u>= (∛100x)/5</u>

7 0
3 years ago
What is the value of the function when x =2
Harrizon [31]

Answer:

To make this easier, first draw or imagine a vertical line at x=2

Find where the vertical line and the graph intersects.

Draw or imagine that point of intersection.

Now, draw or imagine a horizontal line that goes through the point of intersection.

That horizontal line tells us the the value of the function by passing through that mark that says "-2"

The function's value at x=2 is -2.

Have an awesome day! :)

Step-by-step explanation:

8 0
3 years ago
I need help finding the X in these equations
krek1111 [17]

Answer:

For D I believe it would be 6

Step-by-step explanation:

I believe 6 because is you do 108÷18 you get 6 and then it would be 6/108 = 7/18 which is true.

Might not be correct and I don't know the others sorry!

5 0
3 years ago
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