What is 5/7x-10-2/7x-2 simplified?

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

The ratios 3: 9, 4: 12, 5: 15, and 6: 18 are a pattern of equivalent ratios in the ratio table. which is another ratio in this pattern?

Apool measures 12.3 feet by 16.6 feet. if the longer wall of the pool has a diagonal of 17.8 feet, what is the volume of the pool? (round to nearest tenth)