Question

Series of math questions

( i Really need a lot of help on these questions)

1. when x=3 and y=2

find the value of 2x + y

2. divide $328 in the ratio 1 : 3

3. 6 cost 90 pence what would 9 cost?

4. what is 0.25 of a pound

Answer 1

`\huge\fbox{Answer ☘}`

1 )

when x = 3 ; y = 2

`\bold\blue{✯\:\:\:2x + y}`

substitue x = 3 and y = 2 in the given equation !

`\bold{2(3) + 2 = 6 + 2 } \\ \bold{ = > 8}`

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2 )

We've to divide 328 in the ratio of 1 : 3

let the respective distribution be x and 3x.

Then ,

`\bold{x + 3x = 328} \\\bold{ 4x = 328 }\\ \bold{x = \cancel(328)/(4) } \\ \\ \bold{x = 82}`

the respective shares are :

x = $82

3x = $246

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3 )

6 pens cost $90

therefore ,

cost of 1 pen =

`\cancel (90)/(6) = 15 \\`

further ,

cost of 9 such pens = $15 × 9 = $135

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4 )

0.5 of a pound = 113.398 grams

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hope helpful~