Abe has some nickels and some pennies. If the pennies were nickels and the nickels were pennies, he would have 80 cents less than he has now. The difference between the number of nickels and the number of pennies that he has A) Is 12

B) Is 20

C) Is 24

D) Is 28

E) Cannot be Determined

B) Is 20

Step-by-step explanation:

Let X represent the number of pennies.

Let Y represent the number of nickels.

We know that X + 5Y = (Y + 5X) + 80.

4Y = 4X + 80

Y = X + 20

Hence, the difference between the number of pennies and the number of nickels is 20.

(I decided to answer this genius question just like how I have stated before XD)

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500

if x = 1, then the answer is 3.5