Jake got the expression 7x plus 1 and then wrote his answer as 1 plus 7x. is his answer an equivalent expression? how do you know?

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

What is the area of a triangle with vertices at (-3 3) (-3,2) and (1,2)?

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?