Does an angle need to be written as angle abc or can it be written as angle b?

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

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

One cell phone plan charges $20 per month plus $0.15 per minute used. a second cell phone plan charges $35 per month plus $0.10 per minute used. write and solve an equation to find the number of minutes you must talk to have the same cost for both calling plans.