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levacccp [35]
2 years ago
8

£20 is divided between June, Sushil &

Mathematics
1 answer:
Goryan [66]2 years ago
3 0

Answer:

Therefore, June gets £6

Step-by-step explanation:

Total amount = £20

Assume:

June's share = a

Sushil's share = b

Fiona's share = c

a = 2b -----------------------(1)

b = 3c -----------------------(2)

c = b ÷ 3 -------------------(3)

a + b + c = £20  --------(4)

Substitute equations (1) and (3) in equation (4)

2b + b + (b ÷ 3) = £20

10b ÷ 3 = £20

b = £20 * 3 ÷ 10 = £6

a = 2 * £6 = £12

c = £6 ÷ 3 = £3

Therefore, June gets £6

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Answer:

B. 100π

Step-by-step explanation:

The surface area of a sphere is given by

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The radius is 5

SA = 4 * pi * r^2

SA = 4 * pi * 25

SA = 100 pi

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Answer:

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Step-by-step explanation

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The second way to look at this is dimensional analysis. If you have learned this, then continue on reading this, but if you haven't I might only confuse you. I only suggest this because it can make it a little easier.

For the dimensional analysis, you need to start with what you are given and move to what you need to know, so you will start with the $2800 dollars and move to gallons. $2.70 per gallon and 28 miles per gallon are your conversion factors.

Set it up like this:

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This allows the equation to be more organized, and you can check your work by canceling the units.

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