12.89 can be written as 1289/100, hence its a rational number.
Answer:
look for the missing angle
3 X + 9 is greater than 4 x minus 16
+ 25 is greater than x
Once we find what x and y is, that's where they intercept and we can write that as an ordered pair as (x,y)
Now we need to find what y is. So let's put x into the original first equation
3x+4y=16
3(4)+4y=16
12+4y=16 ---Subtract 12 from both sides
4y=4 ---Divide both sides by 4
y=1
Alright, so our ordered pair is (4,1)
