I need help with this please

x=21 interior angle =150 exterior angle=210

Step-by-step explanation:

to find the angle rule=(n-2)×180

n is the number of sides in the polygon

(12-2)×180=1800

1800/12=150 (this is the interior angle)

7x+3=150

x=21

exterior angle = 360-150=210

side xy = 10

sin(x) = 4/5

cos(x) = 3/5

tan(x) = 4/3

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⭐