Fraternal twins are the most common kind of twins. These twins look no more or less alike than any two siblings. The most common combination of fraternal twins is the boy/girl set. Assume the mother is as likely to have a boy as a girl. Use a tree diagram to show why the mother of twins is more likely to have a boy/girl set than a boy/boy set or a girl/girl set.

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(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