I really need help with this Triangle problem

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. after tax the total is 45.99. what percentage of the subtotal is the total?

Aline passes through 3,7 and 6,9 what equation represents the line