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mylen [45]
3 years ago
8

On Tuesday Shayna bought 7 boxes. On Wednesday half of all the boxes were destroyed. On Thursday there were only 21 left. How ma

ny did she have on Monday?
Mathematics
1 answer:
GREYUIT [131]3 years ago
6 0

Answer:

35

Step-by-step explanation:

Monday=x

Tuesday=7

Wednesday=1/2

Thursday=21

Therefore,

x+7/2=21

=x+7=2*21

=x+7=44

=x=44-7

=x=35

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Insert two rational number between 1.3 bar and 1.4 bar​
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<u>General method</u><u>:</u>

Given numbers are 1.3 bar and 1.4 bar

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  • 1.4 bar = 1.444...

Two rational numbers between them

= 1.3222... and 1.43333...

<u>Mean Method</u><u>:</u>

Let X = 1.333... → → →eqn(i)

since the periodicity is 1 then multiply eqn(i) with 10

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⇛10X = 13.333... → → →eqn(ii)

Subtract eqn(ii)-eqn(i)

10X = 13.333...

X = 1.333...

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and

Let X = 1.444... → → →eqn(i)

since the periodicity is 1 then multiply eqn(i) with 10

⇛10×X = 1.444...×10

⇛10X = 14.444...→ → →eqn(ii)

Subtract eqn(ii)-eqn(i)

10X = 14.444...

X = 1.444...

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<u>Answer</u><u>:</u> The two rational numbers between them are 25/18 and 49/36.

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