X = -20p + 500
20p = 500 - x
p = (500 - x)/20
R = xp = x(500 - x)/20 = (500x - x^2)/20
Answer:
15(5)+3=78
21(5)+4=109
78+109=187
Step-by-step explanation:
Additive identity property I believe
2.438 to the nearest tenth is simply 2.4. The reason being is that the number to the right of the tenth is not 5 bigger than 5. 5 or more raise the score, 4 or less give it a rest.
