Donna is running around a track. it takes her 3 1/2 minutes to run 1/4 of a lap. if she keeps running at the same speed, how long will it take her to run 5 laps?

70 minutes

Step-by-step explanation:

3 1/2 ÷1/4= 14 ×5= 70

so you first make 3 1/2 to an improper fraction, then you find the greatest common denominator between 7/2 and 1/4 which is 4, so you multiple 7/2 by 2 and get 14/4 and divide that by 1/4 and get 14minutes now multiply that by 5 laps and receive 70 minutes.

5/6

step-by-step explanation:

if i remember correctly with perpendicular stuff you just take away the negative

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.