Answer: x=9 is an extraneous solution
Step-by-step explanation:
Given
Function is 
for function to exist

Therefore, 9 satisfies the above equation. It is it's extraneous solution.
7x+(x-4)(X+5)-5x
7x+(X*2+ 5x-4x-20)-5x
7x+(X*2+ x-20)-5x
X*2+3x-20
I think as that is a variable so when you like add there is already a constant so it is 1
1+1+1+1= 4
x=1
Answer:
-3 degrees C
Step-by-step explanation:
you just subtract
Answer:
5 cubes
Step-by-step explanation:
15/3=5