Which expression is not equivalent to the other three? a) 2x − 2.5 + 3x − 3 b) 5(x − 1.1) c) 5(x − 5.5) d) 5x − 5.5

the answer is c 5(x+5.5)!

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⭐