Which graph represents this system of equations y+2x=3 & y=2=3x

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

Solve for n? [tex]z = \frac{3}{4} mn[/tex]