scalene and right
since there is a 90 degree angle within the triangle, the triangle can be classified as right (as 90 degrees equals a right angle).
the triangle is also scalene since all sides and angles are different, and are essentially not congruent.
answer a is better.
in the expression 3*x/5 * and / have the same priority ==> we read from left to right ==> (3x)/5 the quotient of 3x and 5.