I need help someone pls help me I been on this for to long

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

Kayla and alberto are selling fruit for a school fundraiser. customers can buy small boxes of grapefruit and large boxes of grapefruit. kayla sold 3 small boxes of grapefruit and 1 large box of grapefruit for a total of $65. alberto sold 1 small box of grapefruit and 1 large box of grapefruit for a total of $55. what is the cost each of one small box of grapefruit and one large box of grapefruit?

Is triangle jkl congruent to triangle rst? if so, what is the scale factor?