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.
Angle c is angle t on the dashed figure
Find some graphing paper and graph away..
i.e. Sub in x = 0 and find what y = ?
y = 1/2(0) + 3
y = 3
So we know the coordinate (0,3)
When x = 4 , y = ?
y = 1/2(4) + 3
y = 4/2 + 3
y = 2 + 3
y = 5
So we know another coordinate (4, 5)
When x = -4, y = ?
y = 1/2(-4) + 3
y = -4/2 + 3
y = -2 + 3
y = 1
So we know another coordinate (-4, 1)
Putting it all together, the coordinates: (-4, 1) , (0, 3) and (4, 5) should be plenty sufficient to graph and then draw a line of best fit connecting them.
Your answer would be 51.6
X time 0.8 (or 80 percent)= 15
so 15/0.8=X
18.75
