If 7 apples cost y cents, how many can you

Reese Munoz

Reese Munoz

Answered question

2022-01-21

If 7 apples cost y cents, how many can you buy for x dollars?
a) 7yx
b) 7xy
c) 700yx
d) 700xy

Answer & Explanation

Armani Dyer

Armani Dyer

Beginner2022-01-22Added 10 answers

Explanation:
As y cents buy 7 apples, y dollars will by 7×100 apples.
Hence one dollar will buy 7×100y=700y apples and x dollars will buy 700y×x apples or 700xy apples.
Hence answer is (d).
search633504

search633504

Beginner2022-01-23Added 16 answers

If you find it difficult to work with variables, make an easy example first. Once you know what you did with the numbers, do the same with the variables.
If 5 apples cost 50 cents, how many can you buy for 3 dollars?
One apple costs 50÷5=10 cents
$3=3×100=300 cents
With 300 cents, I can but 300÷10=30 apples
What did we do?
Cents divided by the number of apples told us the cost of 1 apple.
Change dollars to cents
Divide by the cost of 1 apple:
In one step: 3×100÷(50÷5)
=300÷505
=300×550
=30 apples
If 7 apples cost y cents, one apple costs y÷7 cents
$x=x×100=100x cents
With 100x cents, I can buy 100x÷(y÷7)
=100x÷y7
=100x×7y
=700xy apples

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