The number n has the form 3^x5^y where x and y are positive integers. you are given that 90/n is an integer. what is the greatest possible value of n?

a. 15
b. 30
c. 45
d. 90

show me how to solve this, not just an answer. i am terrible with math.

Standard deviation of 19,29,21,22,23

Ms.ortiz sells tomatoes wholesale. the function p(x)=-80x^2+320x-10, graphed below, indicates how much profit she makes on a load of tomatoes if she makes on a load of tomatoes if she sells them for 4-x dollars per kilogram. what should ms.ortiz charge per kilogram of tomatoes to make on a load of tomatoes?

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.