PLS HELP! WILL GIVE BRAINLIST! Which of the following is a monomial

A. 3x + 4y
B. 25x^2y^3
C. 6x^2 + 5x + 6
D. 9x + 7

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?

Convert (-3,0) to polar form. a. (3,0’) b. (-3,180’) c. (3,180’) d. (3,360’)

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236