Some one me with my math homework

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)

Which graph of a hyperbola represents the equation 16x^2-y^2=16

The poll report includes a table titled, “americans using cash now versus five years ago, by age.” the age intervals are not equal. why do you think the gallup organization chose the age intervals of 23–34, 35–54, and 55+ to display these results?