please PLEASE please help!!! most helpful and detailed (simple) explanation or answer gets best answer (10 points!!)!! :]
(all i need is these 2 questions answered and ill pass math class, pass or fail situation here!! please answer and help!)
1) kay spends 250 min/week exercising. her ratio of time spent on aerobics to time spent on weight training is 3 to 2. how many minutes per week does she spend on aerobics? how many minutes per week does she spend on weight training?
2) a light plane flew from its home base to an airport 255 miles away. with a head wind, the trip took 1.7 hours. the return trip with a tail wind took 1.5 hours. find the average airspeed of the plane and the average windspeed.
2) a ratio is like this, if she spends 3 minutes on aerobics, she spends 2 minutes on weight. Therefore, 2/5 of her time is on weight training. So, 250*2/5=100 minutes/week.
3) so we have 255 miles to go to, so the overall trip takes 510 miles (back and forth). The total time is 1.7 hours + 1.5 hours, or 3.2 hours.
Therefore, 510/3.2 = average speed or 159.375 miles per hour.
the average speed with head wind is 255/1.7= 150 miles per hour.
the average speed with tail wind is 255/1.5 = 170 miles per hour.
Therefore, the average windspeed is 10 miles per hour because (170-150)/2=10
Hope that helps!
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