Answer:
x = 180
Step-by-step explanation:
First, you need to know
1. Double-angle formula:
cos(2x) = 
2. Pythagorean identity:

Back to your problem, replacing the variable by the above:

By Double-angle formula
By Pythagorean identity
Given 



, we know -1 < sinx < 1, for every x ∈ R



Answer: a) 0.99917 b) 0.7054 c) 0.9820
Step-by-step explanation:
Let X denotes the number of people are in favor of a proposed rise in school taxes.
Era re given that p(probability that a person is in favor of a proposed rise )= 0.65
Sample size : n= 100
Mean= np = 100(0.65)=65
Standard deviation: 
a) Now, the probability that a random sample of 100 people will contain at least 50 who are in favor of the proposition :

b) between 60 and 70 inclusive who are in favor;

c) fewer than 75 in favor.

Well the mode is like the most set it numbers so
Answer:
147.03 cm²
Step-by-step explanation:
Area of a parallelogram:
A = bh
A - area
b - base
h - height
From the figure,
Base = 16.9 cm
Height = 8.7 cm
A = (16.9)(8.7)
A = 147.03 cm²
I believe b because it would be dotted and has a slope of 2 or 2/1