The difference of two numbers, a and b, is 21. the difference of 5 times a and two times b is 18. what are the values of a and b? a. 4, 1 b. -19, 40 c. 20, 1 d. 30, 9 e. -8, -29 i will give the brainleist and a like to the right answer

Me asap! what is the slope of this line? enter your answer in the box.

Question 1 of 10 2 points different groups of 50 graduates of an engineering school were asked the starting annual salary for their first engineering job after graduation, and the sampling variability was low. if the average salary of one of the groups was $65,000, which of these is least likely to be the average salary of another of the groups? o a. $64,000 o b. $65,000 o c. $67,000 o d. $54,000

Which property was used to simplify the expression? 3c+9 +4c=3c+4c+9