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Effectus [21]
3 years ago
9

(-1 2/3) the power of 2 =

Mathematics
1 answer:
ElenaW [278]3 years ago
5 0
  • Answer:

2\frac{7}9}

  • Step-by-step explanation:

(-1\frac{2}{3})^{2}=(-\frac{5}{3})^{2}=\frac{-5^{2}}{3^{2}}=\frac{25}{9}=2\frac{7}9}

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A pilot can travel for 140 miles with the wind in the same amount of time as 360 miles against the wind. Find the speed of the w
quester [9]

Answer:

  -88 mph

Step-by-step explanation:

We can use the relation ...

  time = distance/speed

to compare the times in the two directions.

  \dfrac{140}{200+w}=\dfrac{360}{200-w}\\\\140(200-w)=360(200+w)\\\\200(140-360)=w(360+140)\\\\w=\dfrac{200(-220)}{500}=-88 \quad\text{miles per hour}

The wind speed is -88 miles per hour.

_____

The problem statement tells us the travel is slower <em>with</em> the wind than <em>against</em> the wind. Hence "with the wind" must be subtracting from the net speed. That is, the wind speed is negative.

4 0
3 years ago
(3x+4)-(-8-2x) simplified
goldenfox [79]

Answer:

5x+12

Step-by-step explanation:

7 0
3 years ago
How many 20 degree angles does it take to make a full turn?
scoundrel [369]
There is 360* in a circle, so you would divide 360 by 20 to get 18. 
3 0
3 years ago
Help me with number 1 please
viva [34]
17 25 and 1/2 34. 42 and 1/2
3 0
3 years ago
587×6543÷285{32+65}= ? HELP
Ludmilka [50]

Answer:

1307199.57

Step-by-step explanation:

Follow BEDMAS (brackets first, then exponents, then multiplication and division, then addition and subtraction)

587x6543÷285(32+65)

32+65=97

587 x 6543 ÷ 285 x 97

= 3840741 ÷ 285 x 97

= 13476.2842 x 97

= 1307199.57

5 0
2 years ago
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