<u>Answer:</u>
The correct answer is 
<u>Step-by-step explanation:</u>
We are given the following expression and we are supposed to simplify it:
.
As we can see we have a term with under root in both the numerator and denominator of the given fraction. So we will multiply both the numerator and the denominator by this conjugate, where the common factor 
is then cancelled and hence we are left with:
Answer:
-p + 2q - 3r
Step-by-step explanation:
(p + q - 2r) - (2p - q + r)
= p + q - 2r - 2p + q - r
= -p + 2q - 3r
Answer:
Hi again, I'm here to answer!
The correct answers:
10. x = -7 2/3
11. x = 2
12. x = 3
Step-by-step explanation:
(x + 3)/2 = (x - 4)/5
(5x + 15)/10 = (2x - 8)/10
3x/10 = -23/10
x = -23/3
x = -7 2/3
(2x - 1)/3 = x/2
(4x - 2)/6 = 3x/6
x/6 = 2/6
x = 2
(3x + 1)/5 = 2x/3
(9x + 3)/15 = 10x/15
-x/15 = -3/15
x = 3
Hope this helped!
