Step-by-step explanation:
the inner top vertex angle seems to be 90°, so x = 90° too. all angles around a single point in one side of a line are in total 180°.
also, remember, all angles inside a triangle always sum up to 180°.
so, the third inner angle of the triangle is
180 - 90 - 40 = 50°.
that makes z = 180 - 50 = 130°
and y = 180 - 40 = 140°.
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: Range is something
Step-by-step explanation:
6 3
1 4
Reciprocal
6 4
1 3
Multiply normally
6*4=24
1*3=3
24/3=8
I hope this helps;)