What is the total number of points of intersection of the graphs of x^2+y^2=16 and y=x?

Replace y with x

you get
x^2+x^2=16
2x^2=16
divide both sides by 2
x^2=8
square root both sides
x=+/-2√2

there are 2 points of intersection which happen at and

29. because you will divide each number of months by 12 to find the number of years. which would mean, 5, 12.5, 16, 45, 50, 72.5. which is crazy. anyhow, i think you find the median in the middle. and yea hope your test goes good