2) If 20 workers can build a house in 45 days, how many more workers are needed to complete it in 30 days?
А
6
B
15
С
10
D
18

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

Plz determine whether the polynomial is a difference of squares and if it is, factor it. y2 – 196 is a difference of squares: (y + 14)2 is a difference of squares: (y – 14)2 is a difference of squares: (y + 14)(y – 14) is not a difference of squares

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33