Answer: 63 degrees.
Step-by-step explanation:
Angles in a triangle add up to 180 degrees.
Therefore: 54 + y + y = 180
So 54 + 2y = 180
So 2y = 126
Therefore y = 63 degrees.
Two angles are called complementary when their measures add to 90 degrees
Answer:
We are given:

is the critical value at 0.02 significance level
is the margin of error
Therefore, the required sample size is:




Therefore, the required sample size n = 1061
65+55=120
120÷2=60
So, it take them 60mins if they worked together.
Answer:
44.5
Step-by-step explanation:
(1 x 12) + (5 x 13)/2 = 44.5