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Arturiano [62]
2 years ago
9

In a shop, two customers order

Mathematics
1 answer:
patriot [66]2 years ago
8 0

The cost of a tea cup and a cup of coffee in the shop is £0.90 and £1.50 respectively.

<h3>How to write and solve equation?</h3>

let

  • x = cost of tea
  • y = cost of coffee

x + 2y = 3.90

3x + y = 4.20

Multiply (1) by 3 to eliminate x

3x + 6y = 11.70

3x + y = 4.20

5y = 7.50

y = 7.50/5

y = 1.50

Substitute y = 1.50 into (1)

x + 2y = 3.90

x + 2(1.50) = 3.90

x + 3 = 3.90

x = 3.90 - 3

x = 0.90

Learn more about equation:

brainly.com/question/2972832

#SPJ1

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The following values represent the amount of money (in dollars) 10 people have in their wallets: 10, 12, 19, 5, 6, 8, 1, 13, 4,
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The median of all these numbers in dollars is 7.5.

<h3>How to obtain median when no. of given data are odd ?</h3>

When the no. of given data are odd we arrange those nos. in an order increasing or decreasing order and the middle no. is the median of the given odd numbers.

According to the given question the following values represent the amount of money (in dollars) 10 people have in their wallets: 10, 12, 19, 5, 6, 8, 1, 13, 4, 7 and we have to find the median.

First we observe that no. of people is even so there will be two middle nos.

Now lets arrange these nos. in an order from least to greatest which is

1, 4, 5, 6, 7, 8, 10, 12, 13, 19 in this 7 and 8 are middle numbers.

So, to find the median of all these nos. we will divide these two middle nos. by 2.

∴  ( 7 + 8 )/2

= 15/2

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