This is how to solve this problem :)
To evaluate
, you'd start by rewriting this as
and your first step of evaluation is to evaluate
.
When you evaluate
, you have the following:

and this is undefined. Since you cannot perform the first step of the evaluation, you cannot evaluate
.
Factor the numerator to get:
(-3z(z+5))/(z+5) now you notice that (x+5) cancel out leaving:
-3z
Answer:
4. A study where subjects are given treatments and their responses are measured and recorded.
Step-by-step explanation:
The correct answer is - 4. A study where subjects are given treatments and their responses are measured and recorded.
Reason -
An EXPERIMENT is any activity with an observable result.
Here,
Responses are measured and then recorded.
Answer:

Step-by-step explanation:
This is a 30°-60°-90° triangle, so automatically,
, and
.
I am joyous to assist you anytime.