Answer:

Step-by-step explanation:
Divide both sides by 

Simplify:
; 
Answer:
a)
Step-by-step explanation:
Cost function = revenue function - profit function
= -0.3x² + 150x - [-0.5x² + 250x - 300]
= -0.3x² + 150x + 0.5x² - 250x +300
= -0.3x² + 0.5x² + 150x - 250x + 300 {Combine like terms}
= 0.2x² - 100x + 300
49 divided by 3 = 16.33
Each sibling has about 16 rare coins.
Answer:
Routine: started doing his homework.
Surprising: leaped up and started singing in Portugese with one leg in the air.
Step-by-step explanation:
Answer:
3.15
Step-by-step explanation:
10.08 / 3.2 = 3.15