In a trapezoid, three interior angles measure 80°, 100°, and 140°. what is the measure of the fourth interior angle.

Ineed to know the answer to this algebra question.

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

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.