Carl and rick are traveling to a store 5 miles away. Carl is riding a bike, so he's going 12 mph faster than rick. If it takes rick 45 minutes, how long it take carl?

Therefore Carl takes  

Step-by-step explanation:

Speed : speed is the ratio of distance to time.

The S.I unit of speed = m/s

The C.G.S unit of speed = cm/s

12 mph means 12 miles per hour.

Let the speed of Carl be x.

Carl is going 12mph faster than Rick.

Then the speed of Rick is = (x-12)mph

We know that,

h

45 minutes = h

According to the problem,

We know that,

Therefore Carl takes      

93.8

step-by-step explanation:

lets say, first number = x

second number = 3x+7

total = 49

(x)+(3x+7)= 49

4x+7 = 49

4x = 42

x = 42/4

x= 10.5

x= 10.5

3x+7 = 3(10.5)+7 = 93.8

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the correct answer is d

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