1. 540
2. 480
3.525
you do the rest
-3x+9y =18
add 3x to each side
9y = 3x+18
divide by 9
y = 3/9 x +18/9
y = 1/3 x+2
the slope is 1/3
the y intercept is 2
-3x+9y =18
let y=0 to find the x intercept
-3x=18
divide by -3
x=-6
the x intercept is -6
Make sure you know the formula pertaining to the question.
1. c=2(pi)(r)
2. c=2(pi)(d)
r= radius
d= diameter
c= sircumference
So we are given that the circumference of a circle is 12.3pi and the radius is unknown.
So let's plug in the known values
**we use the formula with the radius, becuase we are looking for the radius.
c=2(pi)(r)
12.3(pi)=2(pi)(r)
divide each side by pi
12.3=2(r)
divide each side by 2
r=6.15 in.
It has 2 real solutions which are 5 and 8
