Please help. What is the circumference of the following circle?
(r = 1)
units
(the picture wouldn't work.)

To which sets of numbers does -12 belong? choose all answers that are correct. a) natural numbers b) integers c) real numbers d) irrational numbers

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant.given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.