What is the discriminant for the polynomial ax^2+bx+c

It says factor each expression 49x-28?

Which equation represents a line that passes through the point (9, -4) and has a slope of 3/5?

Determine if the sequence is arithmetic or geometric.  then identify the next term in the sequence.    0.2, 1, 5, 25, . . group of answer choices arithmetic; 75 geometric; 75 arithmetic; 125 geometric; 125