Anyone help me with this? Are these triangles Congruent? By what postulate?

No
Yes. SAS
Yes, SSA
Yes, SSS​

Astudent received the following grades last semester. find the student's semester grade point average. an a is algebra (3 credits), a b in history ( 3 credits), a in sociology ( 3 credits) a d in english ( 3credits) and a c in seminar ( 2credits). an a is worth 4 points, a b is worth 3 points a c is worth 2 points and a d is worth 1 point.

Use set builder notation to represent the following set: { -3, -2, -1, 0}

Standard deviation of 19,29,21,22,23