Which equation is an identity? a. 11- (2v + 3) = -2v - 8 b. 5w + 8 - w = 6w - 2( w - 4) c. 7m - 2 = 8m + 4 - m d. 8y + 9 = 8y - 3

Option b -  

Step-by-step explanation:

To find : Which equation is an identity?    

Solution :

Option a -          

If we open the parenthesis,

No identity applied.

Option b -          

If we apply distributive property,

Distributive identity is applied.

Option c -          

Solve by subtracting in RHS

No identity applied.

Option d-          

This is not possible as

No identity applied.          

Therefore, Option b is correct.

11.2

step-by-step explanation:

when doing tangent the tangent of the angle is equal to the opposite side from the angle over the adjacent side to the angle.

tan43 = x / 12

move 12 over by multiplying each side by 12

12tan43 = x

x = about 11.2