Researchers with the state Department of Natural Resources (DNR) wish to estimate the mean flow rate of water through a stream. From previous research conducted on similar streams, they know that the variance of flow rate is 27,556 gpm2. If the DNR researchers wish to create an interval that they are 99% confident will contain the mean flow rate with bound on the error of estimation of 40 gpm, how many flow samples do they need

The school that imani goes to is selling tickets to the annual dance competition. on the first day of the ticket sales the school sold 7 adult tickets and 5 child tickets for a total of $96. the school took in $40 on the second day by seling 3 adult tickets . find the price of an adult ticket and the price of a child ticket. solve by using substitution elimination college prep algebra math heres the 2 equations i came up with 7x+5y=96 and 3x+2y= -40 show all workiv be stuck on this.

What is the value of x in the this question ?

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11