Annabelles time for a race was 22.7 seconds. Another runners time was 9.85 seconds faster. Write and evaluate an equation with a variable to find the difference between annabelles time and the other runners time

22.7+9.85=x

you don't really need to find the difference using a variable in your equation. You also don't need to know the difference between their times, it is 9.85 regardless. x is 32.55, I think.

7! = 7×6×5×4×3×2

3! = 3× 2

as 7! is multiple of 3! because 7! contains 3! that is 3× 2 as factor

so 7! /(3! ) = 7× 6× 5× 4

= 42 × 20

= 840

its b) 840✌✌✌

dhruv⭐