Why is trig like this?? B:What is the appropriate trig ratio that can be used to solve for x? C:Write the equation

Simplify the expression 10/11(22z) + (a+5) -1

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.

Reading tests are compared for two students. sara got 98, 100, 65, 78, 98, 46, 100, 100, 45, and 50 on her reading test. lee got 97, 67, 89, 99, 100, 45, 79, 89, 58, and 67 on his reading test.