Answer:
over 100 hours
Step-by-step explanation:
my best guess
<u>ANSWER</u>
(C) y
<u>EXPLANATION</u>
We have two equations:
The first one is

The second equation is

Let us make z the subject of this second equation:

We now add equation (1) and (3) to get:

We simplify to get:


Divide throu by 2.



The correct answer is C
A. 12 centimetres.
Hope this helps!
Answer: C- 4,3 D- 9,4 E- 4,5 F- 1,4
Step-by-step explanation: