Aidan has $65 in his bank account. His brother Michael also has a bank account. They want to calculate the amount of money in both accounts combined. What variable is needed to calculate their combined total?
A.
d, the difference between the amounts in Aidan's and Michael's account
B.
a, the amount of money in Aidan's bank account
C.
m, the amount of money in Michael's bank account
D.
l, the amount of money in Michael's account last month

C because they won't know unless they know what Michael has

Step-by-step explanation:

-6 is the correct option from the above given options

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq