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lyudmila [28]
2 years ago
4

The product of 3 numbers is 0.084. If two of the numbers are 0.7 and 0.2, find the third number.​

Mathematics
1 answer:
Mekhanik [1.2K]2 years ago
5 0

Answer:

<em>Given</em><em> </em><em>-</em><em> </em><em> </em>Product of 3 no. is 0.084

To find - Third no.

Solution -

<em><u>Let</u></em><em><u> </u></em><em><u>the</u></em><em><u> </u></em><em><u>third</u></em><em><u> </u></em><em><u>no</u></em><em><u>. </u></em><em><u>be</u></em><em><u> </u></em><em><u>X</u></em><em><u> </u></em>

0.7 × 0.2 × X = 0.084

0.14 × X = 0.084

X = 0.084 /0.14

X = 0.6

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we know that

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valentina_108 [34]

Answer:

The price of a sandwich is £2.5 and the price of a croissant is £2

Step-by-step explanation:

Let s be the number of sandwiches and c be the number of croissants

Then according to given statements the equations will be:

2s+3c = 11\ \ \ \ \ \ \ Eqn\ 1\\3s+6c =19.50\ \ \ Eqn\ 2

Multiplying equation 1 by 2 and subtracting equation 2 from the new equation

2(2s+3c) = 11*2\\4s+6c = 22

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4s+6c-(3s+6c) = 22-19.50\\4s+6c-3s-6c = 2.5\\s = 2.5

Putting s=2.5 in equation 1

2(2.5)+3c = 11\\5+3c = 11\\3c = 11-5\\3c = 6\\\frac{3c}{3} = \frac{6}{3}\\c = 2

Hence,

The price of a sandwich is £2.5 and the price of a croissant is £2

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