K(x) = 4x -2; Find (3)
A) 18
B) -6
D) 6
E) -14
C) 10

With #! i’ve tried to figure it out but i can’t.

Select the lengths in centimeters that would form a right triangle

What is the length of the segment, endpoints of which are intersections of parabolas y=x^2− 11/4 x− 7/4 and y=− 7 /8 x^2+x+ 31/8 ?