Usually bbc bitesize is what I use for basically everything. Here’s a link:
https://www.bbc.com/bitesize
Option C: 
Option D: 
Option F: 
Solution:
Given expression: 
To find which expression is equivalent to the given expression.
Let us solve this using exponent rule: 
Option A: 

It is not equivalent expression.
Option B: 

It is not equivalent expression.
Option C: 

It is equivalent expression for the given expression.
Option D: 

It is equivalent expression for the given expression.
Option E: 

It is not equivalent expression.
Option F: 

It is equivalent expression for the given expression.
Hence
are the equivalent expressions.
Option C, Option D and Option F are correct answers.
Answer:
See below.
Step-by-step explanation:
So, Nikki earns $12 per hour.
And she also earns a 5% or 0.05 commission of her total sales each day.
On Saturday, she worked eight hours and she earned $139. In other words, she earned 8(12) or $96 from working her hours and another $43 (139-96) from her commission.
Thus:

Where x represents Nikki's total sales on Saturday.
Further notes:
To solve, subtract 96 from both sides and divide by 0.05:

Thus, her total sales that day were $860.
Answer: 48m2 + 56m
Step-by-step explanation:
Answer:
-13
Step-by-step explanation:
<u>See steps below:</u>
- 2(3x+6)=3(x-9) ⇒ distribution
- 6x + 12 = 3x - 27 ⇒ grouping like terms
- 6x - 3x = -27 - 12 ⇒ simplifying
- 3x = -39
- x= -39/3
- x = -13 ⇒ answer