Why is -55.1 a rational number?

here u go i hope this helps

Step-by-step explanation:

A rational number is a number that can be written down as a ratio. This means that it can be written as a fraction in which both the numerator (the number at the top) and the denominator (the number at the bottom) are whole numbers, but they can also be a negative number, that is why -55.1 is a rational number

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0

30

step-by-step explanation:

times by times