Y=-3x+8
when x=-2:
y=-3(-2)+8
y=6+8
y=14
when x=0
y=-3(0)+8
y=0+8
y=8
when x=2
y=-3(2)+8
y=-6+8
y=2
86? I'm not sure, sorry.
I plugged in the x and y values of the point given
"The discriminant is prime?" I haven't heard that one before.
Here are the general rules:
1. a positive discriminant results in two real, unequal roots.
2. a zero discr. results in two real, equal roots.
3. a negative discr. results in two complex roots, which sometimes means two imaginary roots.
D. 50 mph
Going upstream takes longer because of the flow of the water
3x + 15 - 2x + 12
(3x - 2x) + (15 + 12)
x + 26
hope this helped :)
