How do you know BC=AB (If the picture unclear, the triangle is label ABC)

its not b

step-by-step explanation:

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⭐

english maybe i can ..

1k

step-by-step explanation:

-6k+7k

(-6+7)k

1k