Number 3: find the value of x

x=4

Step-by-step explanation:

The sum of the interior angles opposite the exterior angle of a triangle are equal to that exterior angle

11x-2  + 9x+1  =  19x+3

20x -1 = 19x+3

Subtract 19x from each side

20x-19x -1 = 19x-19x+3

x-1 =3

Add 1 to each side

x-1+1 =3+1

x=4

1.5%

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⭐