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3 years ago

9

Write equation and solve.

2 answers:

Mumz [18]3 years ago

8 0

46
Take 15 away from 38
=23
Then you double that
=46

elena-14-01-66 [18.8K]3 years ago

4 0

(38 - 15) * 2 = c

c = original cards.

38 - 15 = 23

23 * 2 = 46

You started with 46 cards.

38 - 15 represents subtracting the cards you bought from the half of your original cards.

The * 2 represents multiplying the number of cards you had (without the new ones you bought) being multiplied by 2 (because you lost half of them).

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SOVA2 [1]

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Hence, the surface area is maximum if r = √2,

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