Find the number of real number solutions for the equation. x^2+9x+20=0 a.) can't be determined by graph b.) 1 c.) 2 d.) 0

X^2+9x+20 = 0
factorises to (x+5)(x+4)=0
so x = -5 or -4
Therefore answer is C.) 2

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.