Frankie can build a speaker box in 120 minutes. tisha can build a speaker box 40 minutes faster. if they work together, how many minutes does it take them to build the speaker box?
240 minutes
80 minutes
48 minutes
40 minutes

Talia grouped the terms and factored out the gcf of the groups of the polynomial 15x2 – 3x – 20x + 4. her work is shown below. (15x2 – 3x) + (–20x + 4) 3x(5x – 1) + 4(–5x + 1) talia noticed that she does not have a common factor. what should she do?