In mathematical notation, ∑ means summation. So wherever you see the symbol, you have to sum over all elements in the set. Let's solve the question.
a. ∑m means, to sum all elements in the set m: ∑m = 12 + 15 + 20 + 30 = 77
b. ∑
means to sum all elements in the set f as the square of the elements f = 
c. ∑mf means to sum all elements as the product of the elements of m and f = (12×5) + (15×9) + (20
10) + (30×16) = 875
d. ∑
means to sum all elements as the product of the square of m and f = 
Answer:
90°.
Step-by-step explanation:
if AR is diameter and the angle ∠AOR (it's m∠2) is based on this diameter, then its measure is 90°. It is central angle.
27.5 + 3.094 = 30.594
30.594 + 4.86 = 35.454
your answer would be 35.454
hope this helped
According to the information you gave me I believe it is "y", as it complicates it and it's a term?
If I missed the question please let me know
You want an estimate, not an actual answer. But just in case you think that way, the actual answer is 34/8 - 16/3 - 14/9 = -2 23/36
34/8 = about 4 3/4
16/3 = about 5 1/3
14/9 i= about 1 5/9
So the answer is about 5 - 5 - 1 1/2 which is about (- 1 1/2) That's your answer. Remember you are estimating. I don't know that you can get it much closer without using a calculator.
