The number that is missing is 7.
F(x)=... the f(x) is like the y in a regular equation.
7.03 + 9 + 3.07 = 7 + 3 + 9 + 0.03 + 0.07
= 10 + 9 + 0.1
= 19 + 0.1
= 19.1
Your answer is 19.1
One pound is 0.454
So 2 pounds would be 2 multiplied by 0.454 which is 0.907185
Yes, it has the same result
look at the picture. the red triangle is the first image. the green one is the result of reflecting over x-axis. then if you reflect it over y-axis, it would be the purple triangle
if you had rotated the red triangle at first, it would have the same result
good luck