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Elan Coil [88]
3 years ago
15

6x+7=4x+4y complete the missing value (_,4)

Mathematics
1 answer:
hodyreva [135]3 years ago
8 0

Answer:

x = 4.5

Step-by-step explanation:

6x+7=4x+4y

The first step is to simplify the equation by combining the x terms

Subtract 4x from each side

6x-4x +7 = 4x-4x+4y

2x+7 = 4y

We know the y value is 4

Substitute y=4 into the equation

2x+7 = 4(4)

2x+7 =16

Subtract 7 from each side

2x+7-7 =16-7

2x=9

Divide by 2

2x/2 =9/2

x= 4.5


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4y+12=0<br> How do I get the two points to be graphed
coldgirl [10]

Did somebody say you're supposed to draw the graph of the equation ?
Is that the assignment ?

OK.  Just like every other equation you need to graph, get it in the
standard form, where 'y' is all alone on one side, and everything else
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and y-intercept of the  line, or get some points, or whatever you want.

                                               4y + 12  =  0

Subtract 12 from each side:          4y  =  -12

Divide each side by 4:                      y  =  -3

There's the equation you can handle. 
The y-intercept is -3, and the slope is zero.

Would you like some points ?  OK.  Pick a couple of values for 'x',
and calculate the value of 'y' for each one:

The first value I picked for 'x':  x = 72 
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The second value I picked for 'x' is:  x = 1
The equation is  y=-3, so when x=1,  y=-3.    The second point is (1, -3).

The third value I picked for 'x' is 4 billion.
The equation is  y=-3, so when x=4 billion, y=-3.  The third point is  (1, -3).

Do you see what's going on here ?  Your original equation didn't even
have 'x' in it, so we could tell right away that when the graph is drawn,
the value of 'y' at every point can't depend on 'x'.

When we simplified the equation and got it in standard form, we found that
the slope of the graph is zero.  That means the graph doesn't rise or fall ...
it's just a horizontal line.  Sure enough, the height of points on the line
doesn't depend on 'x'.  The value of 'y' at every point on the line is  -3 .
8 0
3 years ago
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