The martinez family walked three over five of a mile in three over eight of an hour. what is their unit rate in miles per hour?

three-fifths over three-eights equals one and three-fifths miles per hour

three-eighths over three-fifths equals one and three-fifths miles per hour

three-eighths over three-fifths equals five over eight miles per hour

three-fifths over three-eights equals five over eight miles per hour

with explanation

three-fifths over three-eights equals one and three-fifths miles per hour

Step-by-step explanation:

To find the rate in miles per hour, we have to divide 3/5 divided 3/8.

TO make division of fraction, we must invert the second fraction and multiply them:

The ratio is 8/5 miles per hour. In the answer given it is expressed as a mixed numer 1 3/5 that is equal to 8/5.

To transform a fraction to a mixed number, you have to divide numerator by denominator. Explanation is in figure attached.

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