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3 years ago

45÷81 in simplest form

Mathematics

2 answers:

Karo-lina-s [1.5K]3 years ago

3 0

.556 hope this helps ;D

Umnica [9.8K]3 years ago

3 0

45/81 = (5*9)/(9*9) = 5/9

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irina [24]

Kala call lasted for 0.36 minutes

Solution:

Given that Kala purchased a prepaid phone card for $15

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If the remaining credit on her card is $10.68

To find: Number of minutes her call lasted

Let "x" be the number of minutes her call lasted

Cost of 1 minute = $ 12

Total balance = $15

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So we can frame a equation as:

Total balance = Remaining balance + Cost of 1 minute x number of minutes her call lasted

$15 = 10.68 + 12 \times x\\\\15 - 10.68 = 12x\\\\4.32 = 12x\\\\x = 0.36$

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3 years ago

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galina1969 [7]

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3 years ago

1/9-1/x divided by 1/81-1/x2

dedylja [7]

STEP

Simplify —

Equation at the end of step

1 1

— - —

9 x

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Equation at the end of step

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(— - —) ÷ (—— - ——)

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