Answer:
∠ A ≈ 48°
Step-by-step explanation:
Using the Cosine rule to find an angle
cosA = 
with a = 10, b = 13 and c = 11
cosA = 
= 
= 
, thus
A = 
( ) ≈ 48° ( to the nearest degree )
13+(-12-(-5)
13+(-12+5)
13+(-7)
13-7=6
To solve for X in this equation, you would subtract both sides by 14 because our goal is to get X on its own. If we write it out, we see that
X + 14 - 14 = 56 - 14
X=42
Because we have a positive 14, a negative 14 will average out to be 0, but what you do to one side, you must do to the other.
If you have any more questions, feel free to ask!
We can guess and check:
we know 105 tickets were sold for a total of 922 dollars
We know there were 10 dollar & 8 dollar tickets sold.
44(10)+64(8)
410+512
922 dollars
44 $10 tickets sold
3 because I said so and it is correct
