Asurvey of 2,000 doctors showed that an average of 3 out of 5 doctors use brand x aspirin. how many doctors use brand x aspirin? (hint: solve for x

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

At 6 1/2 cents per pound of string beans how much does 7 pounds cost

Tony is charged $ 50 and additional $0.15 per miles for renting a car. a) represent the cost of renting a car with an equation,and the determine the cost if he drove it70 miles.b) what would be the cost of a car rental if the car was driven 250 miles? show work