Answer: The new price is $840
5x - 10y = -40
-10y = -40 - 5x
y = -40 - 5x / -10
Answer:
Angle BOC = 28; Angle AOB = 21
Step-by-step explanation:
Because angle AOC = AOB + BOC you can set the equation:
2x+10 + 4x-15 = 49
<solve for x>
6x - 5 = 49
6x = 54
x= 9
<plug in x for the angles>
BOC = 2(9) +10 = 28
AOB = 4(9) - 15 = 21
Answer:





Step-by-step explanation:

As both
,
lies in the third quadrant.
In the third quadrant,





