Answer:C. (4,5)
Step-by-step explanation:
The first equation can be simplified to y=1/2x +3.
Answer:
5.2%.
After 1 hour (60 / 100) * 700 = 420 gallons of beer have been exchanged.
So we have 420 gallons of 6% and 280 gallons of 4% after 1 hour.
So the strength at that time = (420* 6) + 280*4) / 700
= 5.2%.
x = (180 - 55) + (180 - 25) = 280°
Answer: x = 280°
Answer is in the picture bellow
