What ordered pair represents the y-intercept of the graph of x+y=9?

a.) (0, 9)
b.) (9, 0)
c.) (0, -9)
d.) (-9, 0)

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

What is another way to express 36 +32

Find the equation of the ellipse with the following properties. the ellipse with foci at (0, 6) and (0, -6); y-intercepts (0, 8) and (0, -8).edit: the answer is x^2 over 28 + y^2 over 64 = 1