Let
x------------> Michael's speed <span>(in miles per hour)
y------------> </span>Devon's speed (in miles per hour)
we know that
y=x+2-------> equation 1
speed=distance/time--------> time=distance/speed
distance =5 miles
Michael's time=5/x
Devon's time=5/y
the difference [Michael's time-Devon's time]= 5 minutes
1 hour--------> 60 min
x-------------> 5 min
x=5/60 hour
5/x-5/y=5/60-----------> multiply by 60 both members
300/x-300/y=5-------> (300/x)-5=300/y-------> (300-5x)/x=300/y
y/300=x/(300-5x)------> y=300x/(300-5x)-----> y=60x/(60-x)-----> equation 2
equation 1 =equation 2
x+2=60x/(60-x)--------> (60-x)*(x+2)=60x------> 60x+120-x²-2x=60x
x²+2x-120=0
using a graph tool ----->to resolve the second order equation
the solution is
x=10
then
Michael's speed is 10 miles/hour
Devon's speed is 10+2-----> 12 miles/hour
To find the value of x, you must get it on its own:
3 - 2x = -5
+ 2x
3 = -5 + 2x
+5
8 = 2x
÷ 2
4 = x
Hope this helped!
The number that represents it's probabilty is 1. It's bound to happen, 100/100.
Answer:
Step-by-step explanation:
1: no
2: no
3: Mario Kart (duh)
4: Netflix of XOD
5: I dont know. There are many reasons he should but many reasons he shouldn't.
Answer:
47.12
Step-by-step explanation:
