Write and equation on the line that passed through (0,-1) and is perpendicular to the line y =1/9x+2

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

Josh has a rewards card for a movie theater he receives 15 points for becoming a rewards card holder he earns 3.5 points for each visit to the movie theater he needs at least 55 points to earn a free movie ticket which inequality can josh use to determine x, the minimum number of visits he needs to earn his first free movie ticket.

Amachine part consists of a half sphere and a cylinder, as shown in the figure. the total volume of the part is π cubic inches.