Range should be (-∞ , 10]
answer is C.
2160 divided by 5.5 = 392.7 hopefully this is right!
Answer:
can be written two ways
Step-by-step explanation:
A conversion factor is written based on the equality between the two units
Common denominator = 40
36/40 + 20/40 = 56/40
Reduce and simplify=
7/5, which is 1 and 2/5
Hope that helps
<u>Prove that:</u>

<u>Proof: </u>
We know that, by Law of Cosines,
<u>Taking</u><u> </u><u>LHS</u>
<em>Substituting</em> the value of <em>cos A, cos B and cos C,</em>



<em>On combining the fractions,</em>

<em>Regrouping the terms,</em>



LHS = RHS proved.