Solve for x, rounding to the nearest hundredth. 10^3x = 98
1 answer:
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Answer:
2p+2+p = 20
Step-by-step explanation:
Let p represent the number of Math problems Hayden completed.
Let 2p+2 represent the number of Math problems Jamie completed.
Next, we have to<u><em> add them together</em></u> so that the total Math problems they completed will be equal to 20.
Let's solve.
- 2p+2+p = 20
- 3p+2 = 20
- 3p = 20-2
- 3p = 18
- p =
- p = 6
Therefore, Hayden completed 6 Math problems.
Next, we have to get how many problems Jamie completed.
Let's solve.
- 2p+2 = ?
- 2(6)+2 = ?
- 12+2 = ?
- 14
Therefore, Jamie completed 14 Math problems.
Let's check.
- 2p+2+p = 20
- 14+6 = 20
- 20 = 20
It's correct!
we know that
The time it takes for the train to pass a single post is equal to the time it takes for the train to pass its length.
the length of the train is-----> 375 m
<u>convert to Km</u>
1 Km =1,000 m
375 m=375/1,000=0.375 Km
the speed of the train is 45 km/hour
so
by proportion
<u>convert to minutes</u>
1 hour=60 minutes
0.0083 hours=0.0083*60=0.5 minutes
<u>convert to seconds</u>
1 minute=60 sec
0.5 minutes=0.5*60=30 sec
therefore
<u>the answer is</u>
30 seconds