Curtis rides his bike 9 miles one way then turns around and rides back. On the return trip, his speed is increased 20% because the wind is at his back. Let s be his speed in miles per hour riding against the wind. What is an expression that represents his total time in hours riding there and back?

An expression would then be time = s / 9 + (s*1.2)/9 = 2.2s/9

Step-by-step explanation: Time is speed divided by distance. So time = s / 9 against the wind, and (s*1.2)/9 with the wind. An expression would then be time = s / 9 + (s*1.2)/9 = 2.2s/9

step-by-step explanation:

a cube has 6 sides

the probability of getting 5 on the first cube is 1/6 since only one side of the cube has 5 on it.

there are 3 sides of the cube with even number on it [2,4,6]

therefore the probability of getting even number is 3/6

for both events to happen together, the probability would be

1/6 x 3/6 = 12/36

which simplifies to 1/12