Answer:
A={x:x is a multiple of five }
Answer:
1.4 hrs or 84 minutes
Step-by-step explanation:
t = time when the 2 trains will be 280 miles apart
95t + 105t = 280
200t = 280
t = 1.4 hrs or 84 minutes
Let's use some examples. So what can you make with 16? You can make 1 and 15, 2 and 14, etc.
How about trying 1 and 15 first?
1*15 = 15
What about 2 and 14, 3 and 13, and 4 and 12?
2*14 = 28
3*13 = 39
4*12 = 48.
Now we notice a pattern-- the numbers keep getting bigger, right? So the closer you get to the middle, the bigger the area will get. So if we divide 16 by 2, we get 8. Let's try 8 and 8.
8*8 = 64
That's larger than 48! Now let's try a couple more to make sure.
9*7 = 63
10*6 = 60
11*5 = 55
Next time, you'll know that with one of these problems, the biggest area would be the two numbers closest to each other you can get. Hope this helps! :)
Answer:
Distance problems are word problems that involve the distance an object will travel at a certain average rate for a given period of time.
The formula for distance problems is: distance = rate × time or d = r × t.
Things to watch out for:
Make sure that you change the units when necessary. For example, if the rate is given in miles per hour and the time is given in minutes then change the units appropriately.
It would be helpful to use a table to organize the information for distance problems. A table helps you to think about one number at a time instead being confused by the question.
Step-by-step explanation: