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This is a simultaneous equation question:

x-2y = -4

2x-y = 1

Multiply all terms in the top equation by 2:

2x-4y = -8

2x-y = 1

Subtract the bottom equation from the top equation remembering that a minus minus equals a plus:

-3y = -9

Divide both sides of the equation by -3 to find the value of y remembering that a minus divided by a minus equals a plus:

y = 3

Substitute the value of y into the original equations to find the value of x:

Solution: x = 2 and y = 3

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Q: What is the ordered pair of x-2y equals -4 2x-y equals 1?

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8-x2y 8-2xy 2xy-8

i don't get that if it is 2xy +8 or 8 + 2xy then you can't solve or simplify it any further if it were 8 x 2y then you time the 8 by the 2 to get 16y

(2x)ysquared

Whooop!

It is -2y + x2y - 8, which is an expression that cannot be simplified further, not can it be evaluated.

You will get nonsense. You cannot plug x2y + 4 into anything!

4 (apples) plus 3 (apples) = 7 (apples). 4 (cows) + 3 (cows) = 7 (cows) 4 (x2y) + 3 (x2y) = 7 (x2y)

xy

xy

Do the multiplication, then take the square root. After the multiplication, you get 28x4y2. The square root of 28 is 2 times the root of 7, the square root of x4 is x2, and the root of y2 is y. So, the final result is 2 times square root of 7, times x2y.

x2y = k (constant) so 36 x 2 ie 72 is the constant. If x = 3 then y = 72/9 = 8

The GCF is xy

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