I need help with a math problem.

Mathematics
Tutor: None Selected Time limit: 1 Day

Hi, I been working on 2 dang problems like all day. I know what the answers are, but I'm obviously doing something wrong. 

First one: 16 +5 (20 divided by 4 x 8-3) . The answer is 201

Second one: 22-4 (sq. root of 25 - 3) exponent 2. The answer is 6

I need to know how these problems were simplified?  Thank you.

Oct 10th, 2015

Hello

To start I'll post images of the equations to make sure sure following the same calculation order

To the first question do you mean the answer is 21?


Oct 10th, 2015

Further simplification

(21)* (20/(4*5) 

(21)*(20/20)

20/20 divides out to 1, so

=21*1

=21

Oct 10th, 2015

Not sure if the textbook answers are right, verify if it matches this equation image



Oct 10th, 2015
equation.png

Hmm never mind that graphing calculator improperly checked things

Simplifying


18* (sqrt(25) - 3 ) ^2

18* (25-9)

18 * (16)

= 288

Oct 10th, 2015

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