Answer:
1/5
Step-by-step explanation:
-8-(-10) 2 1
---------- = ------ = --------
1-(-9) 10 5
Answer:

Hope this helps at all. :)
Answer:
137
Step-by-step explanation:
2(-9)^2+5(-9)+20
2(81)-45+20
162-45+20
117+20
137
Answer:

Step-by-step explanation:
Given f(x)=
We have to find 
In order to find
we have to make x as the subject of the formula
Let us assume f(x)=y
⇒
Subtracting both sides by 5


Dividing both sides by 2

⇒
Now substituting y with x
we have 
Now 
=
So option (ii) is correct
1/4 because 0.25 is the same thing as 25/100. 25/100 simplified is 1/4