Bills average on tests is 81. If he gets a 93, he will increase his average by about 2.5%. How many tests has Bill taken already?

Answer question above and explain each step : )

Simplify this expression.2(10) + 2(x – 4) a. 2x + 16 b. x + 12 c. 2x + 12 d. x + 16

Which of the following correctly justifies statement four of the two column proof? a. corresponding angles theorem b. transitive property of equality c. vertical angle theorem d. substitution property of equality