Arelay race is over 1 1/2 kilometers, and each runner on a team will run 1/4 of a kilometer. how many runners are needed for a team?

Number of runners needed = 1 1/2  /   1/4

= 3/2  /   1/4

= 3/2  *  4

= 12/2  = 6  runners (answer).

Conversion: 1 1/2 = 1•2+1=    3/2

                               ———

                                    2

Divide: 3/2 by 1/4 = 3/2 • 4/1 = 12/2 = 6

To divide one fraction by another, invert (turn upside-down) the second fraction, then multiply.

Or change to %  

1 1/2 = 150%     1/4 = 25%

150 divided by 25 = 6

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

you need to give us more information since we can't answer