Answer:
3/8 or 0.375 or 37.5%
Step-by-step explanation:
red, blue, yellow gumballs = 125 total
green gumballs= 75
75 green/200 total gumballs
simplified = 3/8
X+y=8
multiply the first equation by 3 to get rid of x
3x+3y=24
3x+2y=14
subtract equation 1 from 2
y=10
substitute to find the value of x
x+10=8
x=-2
Answer:
Step-by-step explanation:
-7k+21
It would be half of the coefficient of x squared added to both sides:
So half of 8 ( the coefficient of 8x) is 4;
The number 4 squared is 16, so you would add that to both sides.
You do this so that you can easily factor the left side: x^2 + 8x + 16 = 4 + 16
(x + 4)(x+4) = 20
