Solution is x = 4.
The answer is 4 years ago.
Answer:
- The measure of reference angle is
. 
Step-by-step explanation:
Converting 
to degrees,
This means lies in Quadrant 4, and thus its reference angle is 
Since lies in the fourth quadrant, 
and 
are negative.
Since lies in the fourth quadrant, 
is positive, and is equal to 
Answer: Square root of 120. Just multiply 10 by 15, and then keep the square root! Hope this help:))
In an arithmetic series, an = a0+ (n-1) *d that means the nth term is equal to the first term plus n-1 times the common difference. In this case we are told a3=10 and a5=16 so: a3= a+ 2*d =10 => a0= 10-2d and a5= a+4*d = 16 => a0= 16-4d so 10-2d = 16-4d => 2d=6 => d=3 now you can plug this value of d into any of those equations we got for a0 and find a0.for example a0= 10-2(3) = 4 so the first term is 4 the formula for the sum of the first n terms is: Sn = (n/2)* [2a0+ (n-1)*d] so S20 = (20/2) * [2*4 + (19)*(3)] = 10* [65] = 650
