Answer:
464
Step-by-step explanation:
Answer:
d ≈ 14.6 units; M(2.5, 2, 6)
Step-by-step explanation:
The distance formula for 3 dimensions looks a lot like the one for 2 dimensions:
d = √((x2 -x1)^2 +(y2 -y1)^2 +(z2 -z1)^2)
Filling in the given numbers and doing the arithmetic, you find the distance between the points to be ...
d = √((6-(-1))^2 +(-3-7)^2 +(2-10)^2) = √(49+100+64) = √213 ≈ 14.6
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The midpoint is the average of the end points:
M = ((6, -3, 2) +(-1, 7, 10))/2 = (5/2, 2, 6)
The mean score (rounded to 2 DP) in the Math's test for class B is 86.86.
<h3>What is an
equation?</h3>
An equation is an expression that shows the relationship between two or more numbers and variables.
Class A has 15 pupils and class B has 29 pupils. The mean score for class A is 55. Hence:
Mean score of A = (sum of all scores) / 15
55 = (sum of all scores) / 15
sum of all scores in A = 825
The mean score for both classes is 76. Hence:
[(sum of all scores in A) + (sum of all scores in B)]/(total number of pupils) = mean score of both classes
[825 + (sum of all scores in B)]/(15 + 29) = 76
sum of all scores in B = 2519
Mean score of B = (2519) / 29 = 86.86
The mean score (rounded to 2 DP) in the Math's test for class B is 86.86.
Find out more on equation at: brainly.com/question/13763238
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The answer is -10
hope that helps