Mathematics: A collector has 2792 coins altogether. Half of the coins are on display. The collector buys more coins at an auction so that the coins on display are now 40% of the collection. How many coins are bought at the auction?

A collector has 2792 coins altogether. Half of the

Ответ:

cascyrio2002

29.03.2022

Mathematics

3490 coins

Step-by-step explanation:

Given data

Total coins= 2792 coins

Half of the coins are on display

that is 50% are on display

=2792/2

=1396

let the coins bought be x

40% of x= 1396

40/100*x= 1396

0.4x= 1396

x= 1396/0.4

x=3490

Hence 3490 coins were bought

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Ответ:

mvazquez298

03.07.2022

Mathematics

$u=(1+i\sqrt3),\ v=(1+2i\sqrt3)\\\\uv=(1+i\sqrt3)(1+2i\sqrt3)\\\\=(1)(1)+(1)(2i\sqrt3)+(i\sqrt3)(1)+(i\sqrt3)(2i\sqrt3)\\\\=1+2i\sqrt3+i\sqrt3+2i^2(\sqrt3)^2\\\\=1+3i\sqrt3+2(-1)(3)\\\\=1+3i\sqrt3-6\\\\=\boxed{-5+3i\sqrt3}$

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A collector has 2792 coins altogether. Half of the coins
are on display. The collector
buys more coins at an auction
so that the coins on display
are now 40% of the collection.
How many coins are bought at
the auction?

Ответ:

Ответ:

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