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zlopas [31]
3 years ago
10

WILL MARK BRAINLYIST

Mathematics
1 answer:
rodikova [14]3 years ago
7 0

Answer:

D = 45 and C = 26

Step-by-step explanation:

The bigger triangle has a 90 degree corner add that to 64 and you will get 164 (all of the triangles angles have to add to 180) from 180 subtract 164 and you get 26 which is C's answer

For D just divide 90 by 2 (90/2)=45

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Class A has 15 pupils and class B has 29 pupils.
Vaselesa [24]

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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6 0
1 year ago
Rewrite (123 + 456) + 789 using the Associative Law of Addition
adelina 88 [10]

Answer:

123 + (456 + 789)

Step-by-step explanation:

since this is an addition problem, the parenthesis don't matter, and they can be put wherever you want.

(123 + 456) + 789

123 + 456 + 789

(123 + 456 + 789)

123 + (456 + 789)

technically, any of these would work, but I think the kind of answer the problem is looking for is;

123 + (456 + 789)

5 0
3 years ago
Here are some summary statistics about the number of accounts that follow some bands on social media. mean: 15,976 followers med
Lelu [443]

Answer:

what kind of math is this

Step-by-step explanation:

5 0
3 years ago
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Find the area of a regular octagon with apothem of 8.45 cm and a side length of 7 cm
levacccp [35]
<h2>236.59cm²</h2>

Step-by-step explanation:

<h3>Area of octagon = 2(1+√2)a²</h3><h3> = 2(1+√2)7²</h3><h3> = 236.59cm²</h3>

<h2>MARK ME AS BRAINLIST</h2>
4 0
3 years ago
What is 5.092 rounded to the nearest hundredth?
goblinko [34]
5.09 because 2 is less then 5 so you round down
6 0
3 years ago
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