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kherson [118]
3 years ago
13

What is the equivalent of | -21 |

Mathematics
2 answers:
Fynjy0 [20]3 years ago
8 0
That's 21.

Hope this helps !

Nyway
Sonja [21]3 years ago
7 0
Absolute value signs make anything positive so it is 21.
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The reference angle is
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Step 3a: Calculating the average rate
Alex73 [517]

9514 1404 393

Answer:

  a) average rate = (total distance)/(total time)

  b) Rave = 2·R1·R2/(R1 +R2)

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Step-by-step explanation:

a) Let AB represent the distance from A to B. Let t1 and t2 represent the travel times (in hours) on leg1 and leg2 of the trip, respectively. Then the distances traveled are...

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  Second leg distance: AB = 40·t2   ⇒   t2 = AB/40

The average rate is the ratio of total distance to total time:

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__

No equations are given, so we cannot compare what we wrote with the given equations. In each step of the solution, we have used the rules of algebra and equality.

b) For two rates over the same distance (as above), the average is their harmonic mean:

  average rate = 2r1·r2/(r1+r2)

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3 years ago
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