Amath club took a math test. twelve of the members had an average score of 80. eighteen of the members had an average score of 86.

what was the class average?

The solution would be like this for this specific problem:

86 + 80 = 166

166 / 2 = 83

So the class average is 83.

In colloquial language, an average is the sum of a list of numbers divided by the number of numbers in the list.

Just took the quiz, the real answer is 83.6, and not "83" or whatever.

Hope this helps guys.

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.

< 6 cm to > 26 cm i believe

step-by-step explanation: