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Ket [755]
2 years ago
10

Choose the variable. A 31 B m

Mathematics
1 answer:
rodikova [14]2 years ago
6 0

Answer:

B. m

Step-by-step explanation:

Hey there!

A variable is an unknown quantity in an equation or problem.

For example, the problem 3x=15

We want to find out what times 3 will give us 15. x is our unknown quantity.

Hope this helps you! Feel free to comment any questions you may have for me!

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A small boat traveled 29.5 miles upstream in 2 hours. The same boat took 3 hours to travel 59.25 miles downstream. If the speed
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Answer:

  • boat speed: 17.25 mph
  • current: 2.5 mph

Step-by-step explanation:

Upstream, the speed of the current (c) subtracts from the speed of the boat (b) to give the net speed. Downstream, the speed of the current adds. We can make use of the relation ...

  speed = distance/time

  b-c = 29.5/2 = 14.75 . . . . . miles/hour

  b+c = 59.25/3 = 19.75 . . . .miles/hour

Subtracting the first equation from the second, we get ...

  (b+c) -(b-c) = 19.75 -14.75

  2c = 5

  c = 2.5

Then either equation can be used to find b:

  b = 14.75 +c = 17.25

The speed of the boat in still water is 17.25 miles per hour; the speed of the current is 2.5 miles per hour.

5 0
3 years ago
PLZ HELP WILL GIVE BRAINLEST
Zarrin [17]
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2 years ago
The exponent indicates how many times the what is used
sukhopar [10]

The exponent indicates how many times the base is used as a factor.

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2 years ago
100 multiply by 600 + 1000000=​
Slav-nsk [51]

Answer:

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Step-by-step explanation:

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