PLz DO it all I will give brainlest and thanks.

Which of these is and example of a literal equation? a) 6+30=6^2 b)3x-4y c)12=9+3x d)ax-by=k

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.

Over the course of a month, a person's weight decreases. what type of relationship is this? a. positive relationship