The sum of a number and 9 is multiplied by -2 and the answer is 8 find the number. i know the answer is -5 i need a expression, or equation. any of them both

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

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

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ac=26 and ch=8, find bh.