Answer this these are all the points i got left xd

Bring the fraction a/a-4 to a denominator of 16-a^2

In the diagram of circle o, what is the measure of zabc?

Scott’s bank account showed a balance of $750 on sunday. during the next five days, he made one deposit of $140 and numerous withdrawals of $180 each. let x represent the number of withdrawals that scott made. write an inequality that can be used to find the maximum number of withdrawals that scott could have made and maintain a balance of at least $100. do not use a dollar sign ($) in your response.