Answer:
Step-by-step explanation:
Given
--- Average
--- Average
Required
Determine the overall average
Represent the sum of the first three with x.
So:
Solve for x
Represent the sum of the next seven with y.
So:
Solve for y
The overall average is calculated as thus:
Answer:
a. your classmate is correct
b.
Answer:
Step-by-step explanation:
Answer:
The triangles are not similar.
Step-by-step explanation:
First, what's all the information we know?
We know we're trying to prove that triangle BAC is similar to triangle DEC.
We know AC=12 and EC =12 (proving 1 side equal).
We know angle BCA and angle DCE or equal.
However, we do not know any information further than this, and there is no postulate/theorem for AS. Therefore, the triangles are not similar.
Answer:
-1 is the rate of the change
Step-by-step explanation: