Easy,
the Pythagorean theorem is:

The a and b, being a value that you HAVE
and
c, being the value you are trying to find.
Example: have 1,2 for a triangle what is the third side?

1+4=

5=

Then, just square root to find c.

=c
2.2≈c
What are the statements to the equation
Tips to answer
-look up on google for any equation you may need
-if c=cos n in triangle abc find cos c (if that’s needed for the statements)
-look at all answers since they all could be true
~sorry I cannot help more with this~
When one organism gains a benefit at the expense of a second organism and causes them harm is called:
A. Parasitism
B. Mutualism
C. Commensalism
D. Predation
Answer: Density = 0.23 tons per cubic meter.
Step-by-step explanation:
Formula : 
1 ton = 32000 ounces
⇒ 1 ounce = 0.00003125 ton
⇒ 7 ounces = 7(0.00003125)= 0.00021875 ton
1 gallon = 0.00378541 cubic meter
2.5 gallons = 0.009475 cubic meter
Density=

Hence, Density = 0.23 tons per cubic meter.
Yes because a line is basically a ray but different