Because you factor out the 3 and then factor 6x^2+23x+20 That becomes (6x^2+8x)+(15x+20) Factor out a two from the left and five from the right. That makes 2x(3x+4) + 5(3x+4) That becomes (3x+4)(2x+5) Then put the three back in front.
First subtract 4 from 7 since they are just asking for the amount he paid for pitches. Then, take the difference (3) and divide it by .75 to get your answer (4 groups).
