30 ounces at $4.00 per pound. how much was paid for 30 ounces

The price of a visit to the dentist is calculated according to the formula 50+100n50+100n where nn is the number of cavities the dentist finds. on your last visit to the dentist, 22 cavities were found. what was the cost of your visit?

A20 ounce jar of spaghetti sauce costs 2.89.find the cost per ounce

Which is the equation of a line parallel to the line with the equation: y=1/4+2 a: y=-4x-7 b: y=4x+2 c: y=1/4x-1/2 d: y= -1/4x+3 asap