Four tons of gravel weighs how many pounds?

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Ответ:

anessia83

17.09.2020

Mathematics

Answer is 50.

Step-by-step explanation:

$6+\sqrt{-64} * 3-\sqrt{-16}$

Solving:

√64= √2x2x2x2x2x2 =√2^2 x2^2 x2^2 =2x2x2=8

√16 = √2x2x2x2 = √2^2x2^2 = 2x2 = 4

√-1 = i

Putting values:

$=(6 + 8i ) * ( 3-4i)\\=6*3 - 6*4i + 8i*3 -32i^2\\\\= 18 - 24i + 24i -32(-1)\\= 18 + 32\\= 50$

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