If you help me I’ll give 20 points and branliest

The answer should be 6, I belive. because 2×6=12 +3=15

Step-by-step explanation:

I hope this is right, and I hope this helps!:)

6

Step-by-step explanation:

You don't need the model for this; you could solve for x by using the equation above. Just subtract 3 from both sides and get 2x= 12. Divide by 2 from both sides and you get x = 6.

12cm

the answer is d

(2x + 16) + (x) = 180

step-by-step explanation:

given,

abcd is a quadrilateral inscribed in a circle

angle a is labeled x plus 16, (x + 16)

angle b is labeled x degrees, (x)

angle c is labeled 6x minus 4, (6x – 4)

angle d is labeled 2x plus 16, (2x + 16)

what equation can be used to solve for angle b?

we know that the sum of the opposite angles of a simple quadrilateral inscribed in a circle is 180 degrees.

angle b is opposite angle d

therefore, angle b + angle d = 180

(x) + (2x + 16) = 180 

same as (2x + 16) + (x) = 180