I'm using the weighted mean formula to solve this, but I keep getting the answer 12.5 and can't seem to find what I'm doing wrong. Please explain your answer. Thank you!

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

(x-5)1/2+5=2 what is a possible solution?

You are saving to buy a bicycle; so far you save 55.00. the bicycle costs 199.00. you earn 9.00 per hour at your job. which inequality represents the possible number of h hours you need to work to buy the bicycle?