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luda_lava [24]
3 years ago
7

the results of a survey of 878 students show that 62% plan to upgrade their smartphone how many will upgrade

Mathematics
1 answer:
OLga [1]3 years ago
4 0

544 people will upgrade. To get this just make them into fractions

X/878 = 62/100

And then cross multiply

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zavuch27 [327]
\frac{1}{f} = \frac{1}{u} + \frac{1}{v}
multiply f to the entire equation
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add up right side

1=\frac{fv}{uv} +\frac{fu}{uv}
1= \frac{fv+fu}{uv}



multiply uv to both sides
uv= fv+fu
factor out f
uv= f(v+u)
divide (v+u) to both sides
\frac{uv}{v+u}=f

substitute in u=3.5cm and v=-4 cm
3 0
3 years ago
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ivolga24 [154]

Solution:

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Answer:

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