Which of the following best describes the set of all numbers in the form a+bi. where a and b are real numbers and i equals -1 ?

Which statement justifies why angle ebc measures 90?

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

What is negative 3/9 times negative 2/8 ?