<span> joint variation
======================
</span>
Answer:
Number 4: Using Pythagoras Theorem,

Number 5:

3:
It is a right triangle
4:
Not a right triangle
For the last one:

Rounded down (because the answer needs to be a whole number) is 21
Answer:
4 hours
Step-by-step explanation:
3 x 12 = 36
36/9 = 4
Answer: x=0.6 btw how do you put a picture into a question.