you didnt link the picture
160 $ = 100%
x $ = 70%
100 x = 11200
x = 112
160,00 - 112,00 = 48,00$
The correct answer would be 3.
1+(-1)-(-3)
1+(-1)=0
0-(-3)
0+3= 3
Simple, plug n chug...

t=2
u=-8
v=-0.5
Now, plug in what you have,


Now,
2-16=-14
Thus, your answer, -14.
Y=2x+1
x is the input, so the 2x will make it twice the input, and the +1 will make it one more, therefore y(the output) is one more than twice the input :)