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Simplify. 3(4+4x) (type your answer in with no spaces)

Emily convinced her mom to buy a giant box of her favorite cereal. her mom doesn't think the box will fit on their shelf. the volume of the box is 1000 cm^3 . the base of the box is 25 cm by 10 cm

Which of the following is the equation of a line in slope-intercept form for a line with slope = 1/3 and y-intercept at (0, -4)?