Can someone please check my answers?
Thank you!
1. is (-8,-9) a solution of 2x+4y=12 No
2. Solve using the multiplication principle.
-1/2x=-9/10
answer: 9/5
2*-8 + 4*-9 = a negative number, no need to do more
multiply both sides by 10
-5 x = -9
so correct
HOWEVER
the way you typed it is ambiguous
Please type
(-1/2)x if you mean that
or
-1/(2x) if you mean that.
We need the parentheses to tell numerator from denominator
thank you
To check if (-8, -9) is a solution of 2x + 4y = 12, you need to substitute the values of x and y into the equation and see if it is true.
1. Plug in the values:
2(-8) + 4(-9) = 12
-16 - 36 ≠ 12
-52 ≠ 12
Therefore, (-8, -9) is not a solution of 2x + 4y = 12.
2. To solve the equation -1/2x = -9/10 using the multiplication principle, you want to isolate x by getting rid of the fraction coefficient.
1. Multiply both sides of the equation by the reciprocal of -1/2, which is -2/1 or -2.
(-2/1)*(-1/2x) = (-2/1)*(-9/10)
This simplifies to:
x = 9/5
So the solution to the equation is x = 9/5.