To do this, we're going to use the order of operations (PEMDAS):
P - Parentheses
E - Exponents
M - Multiplication
D - Division
A - Addition
S - Subtraction
First let's do parentheses, there isn't anythig in parentheses we need to simplify, so we can skip this step.
Next let's look for exponents. I see we have a
so let's replace that with
:

Now let's look for multiplcation. We know that things that are right next to eachother in parentheses represent multiplcation, so let's simply this more:



And now we're left with a simple problem we know how to solve.
Answer: 
Hope this helps!
Answer:
21
Step-by-step explanation:
put 21 were x is and then divide 21÷7=3
Constants are anything that is not a variable. A variable is a letter. So think about it... What would be the constants? What is not a letter? TIP: Make sure you include - sign!_
B. 6
Explanation: 8(6+4)= 80
38+ 7(6)= 80
Answer:
Original price was $50 x 0.20 = 10
original price $50 - 10 = $40 the sale price before sales tax
Step-by-step explanation:
hopefully it helps