y=-5x-44
Step-by-step explanation:
5x+y=13 passes through (15,31)
rearrange the equation to y=mx+c
5x+y=13
y=-5x+13
substitute the points (15,31)
y=5x+c
31=5(15)+c
31=75+c
-44=c
y=-5x-44
Can be written as 5x+y=-44
The answer of 4/10 - 28/100 is 3/25 in simplest form
47-25= 22
22 divided by 47 =0.468 aka 47% increase
4875 rounded to the nearest hundred is 4900
you split the problem into two separate problems and go from there.
so, (5x+15) and (xy+3y) then you take out the common factor in both
so, positive 5 out of (5x+15) and positive y out of (xy+3y)
you'll then have 5(x+3) and y(x+3)
The x=3 is similar in both problems so you can combine them to make one and combine the two factors you took out to make another problem.
So your final answer is (x+3)(5+y)
