The distance from a boy's house to his school is 10km. He left home at 6:30am, cycling at the rate of 4km/h. If he spent 15mins on the way waiting for a friend, when did he get to school?

9.15 am

Step-by-step explanation:

Time = distance / speed

= 10 / 4 = 2.5 hours = 2hrs 30 minutes

He spends 15 minutes waiting

2.30 + .15 = 2.45 hrs

He will teach school at 6.30 + 2.45 = 9.15 am

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

hope this

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step-by-step explanation: