What is the graph of 3x + 5y = –15?

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

This is about circle theorems. someone asap : (

Lines f and g are cut by the transversal d. the measure of 1 = 2x + 35 and the measure of 8 = 10x - 85. what value of x will show that lines f and g are parallel? a. 19 b. 26 c. 18 d. 15