This week, Michael collected $468 for delivering newspapers. He had 40 repeat customers and 18 new ones. As an incentive, he cha
1 answer:
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We'll first simplify both sides of the expression to get (simply using the distributive property):
Then, we can simplify a little bit:
To solve for n, we have to isolate it. Let's subtract 3n from both sides to further simplify it:
Then, add 18 to both sides to get the value of n:
And that's your answer. If you have questions on how I got that, feel free to ask!
Then, we can simplify a little bit:
To solve for n, we have to isolate it. Let's subtract 3n from both sides to further simplify it:
Then, add 18 to both sides to get the value of n:
And that's your answer. If you have questions on how I got that, feel free to ask!
Answer:45 mi/h
Step-by-step explanation:
Recall: Speed = distance / time
Let the time taken for the morning journey be and the time taken for the afternoon journey be
,and the distance covered be d
that means for the first journey,
30 =
d = 30
Also for the afternoon journey,
d = 60
Equating the two , since the same distance is being covered , we have
30 = 60
that is
=
= 2
Also ,
total distance covered = 30 + 60
Average speed = total distance / total time
= 30 + 60
/
+
Recall that = 2
, substitute this into the formula for average speed , then we have
Average speed = 30(2) +60
/ 3
Average speed = 120 / 3
Therefore :
Average speed = 40 mi/hr