What is the value o y in the equation 6.4x + 2.8y=44.4, when x=3

9

Step-by-step explanation:

6.4 x 3=19.2

You move 19.2 to the other side and subtract.

44.4 - 19.2=25.2

Then you do 25.2 divided by 2.8 that will give you 9.

y=9

Step-by-step explanation:

I'm going to write this out in equations, let me know if you want it in words too.

1.   6.4x + 2.8y = 44.4 (subtract 6.4x from both sides to get y alone)

2.  2.8y = -6.4x + 44.4 (divide both sides by 2.8)

3.  y = -2.2857x + 15.8571 (substitute 3 for x)

4.  y = -2.2857(3) + 15.8571 (multiply -2.2857 by 3)

5.  y = -6.8571 + 15.8571 (finish solving)

6.  y = 9

what is the question? i am guessing you are looking for the area.

to find an area, you have to do length x width.

in this case, it would be 12 ft x 4 ft = 48 sq. ft

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step-by-step explanation:

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