Solve the following:
1.) x2 + 2x + 9 = 0
2.) x2 - 7x = -13
3.) -3x2 - 4x - 4 = 0
4.) 3x2 = -12x - 15
5.) -2x2 - 16x - 44 = 0

Consider the diagram. which line segment has the same measure as st? rx tx sr xs

(least common multiples) the answer that i had in the 1st step was lcm of airline tickets sold=72. idk if that even matters but just in case. ! three co-workers are busy selling airline tickets over the phone. in an 8-hour day, charles can sell 8 airline tickets, ann can sell 9 airline tickets, and michelle can sell 6 airline tickets. step 2 of 2: what is the smallest number of 8-hour days needed for each of them to achieve the same number of sales? it takes charles . it takes . it takes .

Can some one explain how to slove specifically, what is the value of x? 0.9(x+1.4)-2.3+0.1x=1.6 enter the answer as a decimal in the box. x= ?