Mathematics: Khalid buys story books from an online store. Each book costs AED12.99 and shipping fee is charged at AED 4.95 for all the books together. Which expression could Khalid use that would represent the cost of purchasing his books?

Answer is 50.Step-by-step explanation:Solving:√64= √2x2x2x2x2x2 =√2^2 x2^2 x2^2 =2x2x2=8√16 = √2x2x2x2 = √2^2x2^2 = 2x2 = 4√-1 = iPutting values:...

Khalid buys story books from an online store. Each

CarlsonB

23.03.2021

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anessia83

17.09.2020

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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