Answer:
9
Step-by-step explanation:
By joining N to L, you will have a right angled triangle which is right angle at N. Then r^2+36=(3+x)^2. r=9/2. PQ=2r=9
0.005
Multiplying by ten moves the decimal point over one.
It’s B because 5 = -3(-3) - 4
5=9-4
Just plug in the numbers and see what works
Answer:
The mean score for all students on the quiz was 86.
Step-by-step explanation:
This question is solved by a weighed average.
To find the weighed average, we add the values multiplied by their weight, and after that we divide by the sum of weights.
In this problem, we have that:
Mr. Spears had 20 students in his class with a mean score of 80.
So 80 has a weight of 20.
Mrs. Guyton's class of 30 students had a mean score of 90.
So 90 has a weight of 30.
Overall, what was the mean score for all students on the quiz

The mean score for all students on the quiz was 86.
Answer:
Step-by-step explanation:
Question: 5/8 + 3/10
Answer: 25/40 + 12/40 = 37/40
Explanation: Find the least common denominator of each fraction
According to this problem, the least common denominator is 40
The common denominator you can calculate as the least common multiple of the both denominators - LCM of 8 and 10 is 40
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