Factor –7x3 + 21x2 + 3x – 9 by grouping. what is the resulting expression?
(3 – 7x)(x2 – 3)

(7x – 3)(3 + x2)

(3 – 7x2)(x – 3)

(7x2 – 3)(3 + x)

2men and 7 boys can do a piece of working 4 days.it is done by 4 men and 4 boys in 3 days how long would it take for 1man or one boy to do it alone

3-12. write each answer with a reasonable number of figures. find the absolute uncertainty and percent relative uncertainty for each answer. (a) [12.41 (±0.09) + 4.16 (±0.01)] x 7.068 2 (±0.000 4) =? (b) [3.26 (±0.10) x 8.47 (±0.05)] - 0.18 (±0.06) =? (c) 6.843 (±0.008) x 104 + [2.09 (±0.04)- 1.63 (±0.01)] =?

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?