Fred runs at average speed of 12km per hour and flies at an average speed of 76km per hour. they traveled a total distance of 120 km in 2 hours how long did it take her to run and fly

Fred ran for 0.5 hours and flied for 1.5 hours.

Step-by-step explanation:

Distance covers while running = d

Time taken to cover d distance = x

Speed while running = 12 km/h

Distance covers while flying = D

Time taken to cover D distance = y

Speed while running = 76 km/h

Total distance = 120 km

Total time taken = 2 hours

Average speed :

Here ,120 km = d + D

120 km = d + D

..[1]

x + y = 2 hours..[2]

Solving both equation by substitution method:

Putting value of x from [2] in [1]:

x = 2 - y

x = 2 - y = 2 - 1.5 = 0.5

Fred ran for 0.5 hours and flied for 1.5 hours.

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500

well we know there are 4 clubs in 52 cards so it’s replaced so it should be 3/51

step-by-step explanation: