Line bc contains points b (4, −5) and c (3, 2). line de contains points d (2, 0) and e (9, 1). lines bc and de are

a. parallel
b. perpendicular
c. neither

The square root of 9x plus 7 plus the square rot of 2x equall to 7

Identify the number as a rational or irrational.explain. 127

The mass of a marine organism, in pounds, p years after it is born is given by the polynomial function r(p) = -4p2 + 300p. find the mass when p = 20 years.