Adrian and Brian are brothers. They leave the house on their bicycles and head to school that is a distance of 4 km away. Adrian
1 answer:
Answer:
Brian's rate is 15 km/hr
Adrian's rate is 16 km/hr
Step-by-step explanation:
Let r = Brian's rate
r + 1 = Adrian's rate
4/r = Brian's time
4/(r + 1) = Adrian's time
The difference in times is 1 min = 1/60 hr
LCD = 60r(r + 1)
4(60)(r + 1) - 4(60)r = r(r + 1)
240r + 240 - 240r = + r
+ r - 240 = 0
(r - 15)(r + 16) = 0
r = 15 or r = -16
Since the rate cannot be negative, Brian's rate is 15 km/hr and Adrian's rate is 16 km/hr
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Find the length of each side using the distance formula:, then add all three side length for the perimeter.
Area is found by multiplying the base by the height by 1/2.
See attached picture for the answer:
Answer:
0 hours = $40
1 hours = $75
2 hours =$110
3 hours =$145
4 hours =$180
5 hours =$215
Step-by-step explanation:
C=Cost in dollars,
n=hours.
Calculating Cost for 0 hours
Cost for 0 hours=$40
Calculating Cost for 1 hours
Cost for 1 hours=$75
Calculating Cost for 2 hours
Cost for 2 hours=$110
Calculating Cost for 3 hours
Cost for 3 hours=$145
Calculating Cost for 4 hours
Cost for 4 hours=$180
Calculating Cost for 5 hours
Cost for 5 hours=$215
