Jia has a bag with a purple marble, a white marble, and an orange marble. She pulls a marble from the bag and then puts it back 3 times.

PART A: How many possible outcomes are there for this experiment?
Part B: What is the probability of selecting exactly 2 white marbles?
PART C: What is the probability of selecting two orange marbles after selecting a purple marble?

step-by-step explanation:

descending order means to order the polynomials from the term with the largest exponent to the term with the smallest exponent.  

therefore, the correct answer is d.  

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.