his score was increased... so if he is now at 67 and it was increased by 7 so his first grade would have been 60.
You answered correctly for part a. just simplify it. so for part a it would be x^4 + 8x^3 + 24x^2 + 32x + 16. repeat what you did in part a with part b (add & simplify). btw, the missing side in part c is 2x-x = x
Answer:
2,300
Explanation:
This is given as:

Therefore, there are 2,300 ways that 3 persons can be selected from 25 people
Edgar increases his amount of protein consumption by 133%