<span>The first step you need to do is to rewrite
x+y=3
as y=3-x
</span><span>Now we can replace the y in the equation with our newfound value for y, which is
y=3-x.
So lets write it now like this
Q=x^2+2(3-y)^2
=x^2+18-12x+2x^2
=3x^2+18-12x
</span>Hope this helps
Answer:
1 1/3
Step-by-step explanation:
m = y2-y1 over x2-x1
D.500 meters is an expression of distance in SI units.
Its 81 centimeters because you round 5 and over. So nearest centimeter means 2 whole numbers which is 81
