An experiment consists of randomly drawing one marble from a bag containing 7 purple, 4 blue, and 3 green marbles. what is the probability of selecting a purple marble from the bag if the answer is expressed as a fraction?

x = 25

step-by-step explanation:

a^2+b^2=c^2

7^2+24^2=c^2

49+576=625

sqrt625=25

x=25

  or  

step-by-step explanation:

if the four friends split the cost, p, of the pizza evenly, then each friend pays one-fourth of the cost of the pizza.

the expression is   or