3 years ago

1) Find the mean. 14, 2, 12, 11,2, 14, 3, 2, 12 A) 2 B) 8 C) 11 D)

Mathematics

1 answer:

artcher [175]3 years ago

6 0

Answer:

Step-by-step explanation:

Add all the numbers and then divide them by how many numbers there are.

(14 + 2 + 12 + 11 + 2 + 14 + 3 + 2 + 12) = 72

72/9 = 8

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What is the area of the composite shape? A.14 B.24 C.36 D.68

lyudmila [28]

Answer:

Step-by-step explanation:

The top part is 4.5 inches and teh bottom is 27 so it is 36

6 0

3 years ago

Let G denote the centroid of triangle ABC. If triangle ABG is equilateral with side length 2, then determine the perimeter of tr

zhannawk [14.2K]

We know from Euclidean Geometry and the properties of a centroid that GC=2GM. Now GM=sin60*GA= $\sqrt{3}$ . Hence CM=GC+GM=3* $\sqrt{3} /$ . Now, since GM is normal to AB, we have by the pythagoeran theorem that:
$AC^2=AM^2+GM^2=BM^2+GM^2=BC^2$
Hence, we calculate from this that AC^2= 28, hence AC=2* $\sqrt{7}$ =BC. Thus, the perimeter of the triangle is 2+4* $\sqrt{7}$ .