First draw out the picture it will help. Then you can see that you want the opposite segment of the angle, which leads you to use a sine. So you have 20sin30 or 20(1/2) or 10ft.
The solutions of the expressions -(-1), -|-1|, -|1|, |1|, and |-1| are 1, -1, -1, 1, and 1.
We are given five expressions. An expression or mathematical expression is a finite collection of symbols that is well-formed according to context-dependent norms. The first expression is -(-1). The simplified solution of the first expression is 1. The second expression is -|-1|. The simplified solution of the first expression is -1. The third expression is -|1|. The simplified solution of the first expression is -1. The fourth expression is |1|. The simplified solution of the first expression is 1. The fifth expression is |-1|. The simplified solution of the first expression is 1.
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Answer: Our required answer will be
Step-by-step explanation:
Since we have given that
We need to get the difference:
1) We first open the second bracket and make appropriate change in signs :
2) Gather the like terms together :
Hence, our required answer will be
Answer:
s = 19.7
Step-by-step explanation:
First we need to calculate the mean x' of the sample as:
We sum all the scores and divide them by the number of scores.
Then, the standard deviation s is calculated as:
We square every score less the mean, sum every value, then divide that by the number of scores less 1 and finally, we calculate the square root.
So, the standard deviation of the sample is 19.7
2:3=£165
2:3 =5
2/5 x 165
=2x33
66
=3/5 x 165
3 x 33
99
answer: 66 : 99
