You toss one coin and roll one number cube. What is the probability the coin is heads and a 3 is rolled?

X+ y = 5 ; x - y =3 solve using linear combination

In an improper fraction, is the numerator equal to, less than, or greater than the denominator

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?