The marginal utility curve for units 1 through 5 of good Z lies above the horizontal axis. What does this imply must be true about the total utility curve for units 1 through 5 of good Z?

How do you solving the solution of each system using elimination?

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

Okay so i didn't get this problem petro bought 8 tickets to a basketball game he paid a total of $200 write an equation to determine whether each ticket cost $26 or $28 so i didn't get this question so yeahyou have a good day.