Ilearned this a while ago and totally forgot how to do it. really need .

Agrain trader buys the following amounts from three suppliers: 3,200 pounds, 5,100 pounds and 700 pounds. what is the total weight of his purchase?

(08.01)consider the following pair of equations: x + y = −2 y = 2x + 10 if the two equations are graphed, at what point do the lines representing the two equations intersect? (−4, 2) (4, 2) (−2, 4) (2, 4)

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2