The price to ship a box varies directly as the weight of the box in pounds. a box that weighs 4 pounds costs $4.20 to ship. what would it cost to ship a second box that weighs 30 pounds? a. $28.57 b. $126.00 c. $7.88 d. $31.50

answer: standard form is ax^2 + bx + c = 0

step-by-step explanation:

standard form is ax^2 + bx + c = 0

(2x + 1)(x - 2) = 0

distribute to get into standard form

2x^2 - 4x + x - 2 = 0

2x^2 - 3x - 2 = 0

a = 2, b= -3, c = -2

a is your answer