Answer:
D
Step-by-step explanation:
The contrapositive is where the variables are reversed and the positive/negatives are reversed. For example, the contrapositive of the statement "If it rained last night, the ground is wet" is "If the ground is not wet, it did not rain last night".
Let

denote the event that a student is a freshman,

a sophomore,

a junior, and

a senior.
Let

denote the event that a student majors in engineering. By the law of total probability,

By the definition of conditional probability, we can expand each of these intersection probabilities to get

Answer:
79 degrees
Step-by-step explanation:
180 - 101 = 79
3x - 5y = 27
-3x -12y = 24
-17y = 51
/-17 /-17
y = 3
x + 4(3) = -8
x + 12 = -8
-12 -12
x = -20
(-20, 3)