Answer:
14
Step-by-step explanation:
The trapezoids are similar, so you need to find which sides allign with each other. It can be seen that among the paralel sides of the trapezoid, the longer ones will be similar by the factor of 2. So, 2*7=14
Answer:
If
and
, then 
Step-by-step explanation:
This is a problem that utilizes both substitution and the order of operations.

Answer:
Step-by-step explanation:
It's never negative.
Answer:
number 8 is a rational number because it can be written as the fraction 8/1
Step-by-step explanation: