Answer:
2.9
Step-by-step explanation:
It just is
Start at (-2, 4) and draw a line that goes right once and down 3 times then repeat
If a and b are supplements, their total is 180 degrees, by definition. If b and c are supplements, their total is 180 degrees, by definition.
If you want to leave a 15% tip, use the fact that 15% = 10% + 5%. Calculate 10% of the bill by moving the decimal point one position to the left. Then, take that number, divide it in half, and add the new amount to the original 10%
According to the law of cosines:

.
Substituting all the values we know and finding

using a calculator, we have:

We discard the negative solution clearly.
Answer: b=9 units