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Firdavs [7]
3 years ago
6

Explain how to calculate a number that is equal to 2.1/1.5.

Mathematics
1 answer:
Sholpan [36]3 years ago
7 0

Answer:

1.4

Step-by-step explanation:

Given the expression 2.1/1.5.

This can also be expresses as;

2.1/1.5

= 21/10 ÷ 15/10

= 21/10 × 10/15

= 21/15

= 7/5

= 1.4

Hence the result is 1.4

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The main idea here is to "translate" the words into maths. 
First we need to identify the unknowns and label these. 

We need to know the number if dimes and the number of quarters. So lets say
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Now lets write equations from the written problem. 
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x are the number of dimes, their value is x*10
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thus: 
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We have two equations and two unknowns now, that needs to be solved to get the answer. 

x + y = 36
10x+25y=585


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