Graph a shows function f of x equals 3 multiplied by 3 to the power of x. graph b shows function f of x equals 9 to the power of x. graph c shows function f of x equals 3 multiplied by 3 to the power of negative x. graph d shows function f of x equals 9 to the power of negative x. which graph best shows the function f(x) = 3(3)−x to represent the rate at which a radioactive substance decays?

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations:

the monthly balance will be $75,000

step-by-step explanation:

mean or average is 40.6

yes

step-by-step explanation:

they have to be opposite and reciprocal of eachother.