Find The term containing x^3 in the expansion (x-3)^10

Beth divided 9 ounces of her granola recipe into 4 equal-sized amounts. she placed the amounts into individual bowls. the fraction 9/4 represents the number of ounces of granola in each bowl. which other number represents the amount of granola beth has in each bowl? (a) 1 1/4 (b) 2 1/4 (c) 1 3/4 (d) 3 3/4 i need !

What would the rule be for the reflection of y=-3

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25