Answer:
Possible values of fredicos age satisfy
where
denotes fredicos age.
Step-by-step explanation:
Let
denotes fredicos age.
Three times the difference of fredicos age and 4, increased by 7 = 
According to the question,

So, possible values of fredicos age satisfy 
Here,
denotes fredicos age.
Answer:
reasonable conclusion , representative sample
Step-by-step explanation:
The cost of company 1: 10x+50
The cost of company 2: 8x+60
The cost will be the same at:

The answer is 5 hours
Answer:
the answer is 3
Step-by-step explanation:
is this a joke
X-2 = 4+x
+2 +2
x = 6+x
-x -x
0 = 6
Answer: no solution / empty set / ∅