Describe how to evaluate the expression 3^2 + (21 - 9) X 6÷2. Can someone help me out, please? I'm having trouble, and my teacher isn't responding to my messages.

Question

asked Sep 17, 2021 4.6k views

1 Answer

Mljrg · Answer 1 · 2021-09-21T12:54:22+0000

Answer:

$3^2+\left(21-9\right)* \:6/ \:2=45$

Explanation:

Given the expression

$3^2\:+\:\left(21\:-\:9\right)\:* \:6/ 2$

Follow the PEMDAS order of operations

$3^2\:+\:\left(21\:-\:9\right)\:* \:6/ 2$

calculate within parentheses
$\:(21-9)=12$

$=3^2+12* \:6/ \:2$

calculate exponents
3^2=9

$=9+12* \:6/ \:2$

Multiply and divide (left to right)

=9+36

Add and subtract (left to right)
$12* \:\:6/ \:\:2=36$

=45

Thus,

$3^2+\left(21-9\right)* \:6/ \:2=45$