You have to do whats in the parentheses from left to right then subtract the answer you get by 20
(9x10) - (30+30)
90 - 60 = 30
8 x (12+5) -7^2
17
17-49
18 x -32
= -576.
You have to use pemdas for your check off
P=parentheses
E=exponet
M=multiplication
D=division
A=add
S=subtrabt
HOPE IM CORRECT
All of them Are correct, assuming this is the recipe.
Answer: 1/5 or 8 houses. Company X provides electricity to 8 houses, Company Y provides to 24 houses, so that would mean Company Z provides 8
It's C x5 the correct answer I'm not sure
Applying an exponential property, it is found that the function that will generate the same note sequence as function f(n) is given by:
B. 
<h3>What is function for the note sequence?</h3>
The function for the node sequence is defined by:

A function that will the same note sequence as function f(n) has the same initial value of 6. Additionally, applying an exponential property, we have that:

Hence option B is correct.
More can be learned about exponential properties at brainly.com/question/25537936
#SPJ1