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kvv77 [185]
3 years ago
10

Solve this inequality.Two people running pass each other. They continue in opposite directions. The first person is running at 6

mph. The other one is running at 10 mph. How many minutes will pass before they are at least 2 miles apart?
Mathematics
1 answer:
klemol [59]3 years ago
3 0

Answer:

Step-by-step explanation:

6t+10t \geq 2\\16 t\geq 2\\t\geq \frac{2}{16} \\or ~t\geq \frac{1}{8} ~hrs\\or~t\geq \frac{60}{8} \\or~t\geq 7.5~minutes.

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PLZ HELP! A train averages a speed of 90 miles per hour across the plains and 37.5 miles per hour through the mountains. If a tr
Kruka [31]

Answer:

3.8

Step-by-step explanation:

A train averages a speed of 90 miles per hour across the plains and 37.5 miles per hour through the mountains.

If a trip of 300 miles took 3 hour and 48 minutes, how much of it was through the mountains?

Let d = distance traveled at 37.5 (thru the mountains)

then

(300-d) = distance traveled at 90 mph

Write a time equation, time = dist/speed

change 3 hr 48 min to hrs: 3 + 48/60 = 3.8 hrs

plain time + mountain time = 3.8 hrs

%28300-d%29%2F90 + d%2F37.5 = 3.8

Multiply 90*37.5

3375*%28300-d%29%2F90 + 3375*d%2F37.5 = 3.8(3375)

cancel the denominator

37.5(300-d) + 90d = 12825

11250 - 37.5d + 90d = 12825

52.5d = 1575

d = 1575/52.5

d = 30 mi thru the mountains

Check this, find the distance on the plain

300-30 = 270 mi

Find the actual time at each speed

270/90 = 3 hrs

30/37.5 = .8 hrs

-----------------

total time: 3.8 hrs

7 0
3 years ago
Natalie works in a doughnut shop. She packs doughnuts into boxes that each hold 12 doughnuts.
ehidna [41]

Answer:

16

Step-by-step explanation:

If each box holds 12 doughtnuts, and she packed a total of 1,272.

Then 1,272/12 is 16.

Therefore, she needs 16 boxes

4 0
3 years ago
Read 2 more answers
Please I need help someone please
frutty [35]
Pt 1 - how much the value goes down each year
Pt 2 - how much the car was originally worth
3 0
2 years ago
Chris is reading a book that has nine-hundred seventy-eight pages in it. Every night
GaryK [48]

9514 1404 393

Answer:

  Every night

Step-by-step explanation:

The problem statement tells you ...

  "Every night Chris reads a number of pages that can be rounded to the nearest hundred."

Then it asks you ...

  "On what nights does Chris read a number of pages that can be rounded to the nearest hundred?"

If we take the problem statement at face value, the answer must be ...

  "Every night."

7 0
2 years ago
A new outdoor rec center is being built in hardford. The perimeter of the rectangular playing field is 258 yards. the length of
Taya2010 [7]
P = 2(L + W)
P = 258
L = 2W - 9

258 = 2(2W - 9 + W)
258 = 2(3W - 9)
258 = 6W - 18
258 + 18 = 6W
276 = 6W
276/6 = W
46 = W <=== here is the width

L = 2W - 9
L = 2(46) - 9
L = 92 - 9
L = 83 <== here is the length
5 0
3 years ago
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