Answer:
47.5
Step-by-step explanation:
If

then


If
is known and Jimmy wants to find
, then he has to know the value of
.
Answer: 
Step-by-step explanation:
Rewrite the expression:

Factor out the negative:


Rewrite the sum:


Calculate the sum:


Solve:


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Answer:2
Step-by-step explanation:
Answer:
y=6
Step-by-step explanation:
The equation of the line with slope 2 is y=2x+b, b is a constant which should be determined. The line passes via through points (1, 2) and (3,y)
(1, 2): 2=2+b --> b=0
So, the equation of the line is y=2x. Now, when x=3, y=6. So the line y=2x passes through points (1, 2) and (3, 6). (3,y)=(3, 6).