The correct answer is 3/4
If he bikes for 10 miles per hour and 8 miles per hour for the same distance x miles, he went 10 miles per hour for x/10 hours, as Distance = Rate*Time and on the way back he would go for x/8 hours. So then he went 2x distance, in x/8 + x/10 hours. Since x/8 + x/10 = 10x/80 + 8x/80 = 18x/80 = 9x/40, he went 2x miles in 9x/40 hours. this can be converted into a rate with the above equation Distance = Rate*Time, so 2x=(9x/40) * Rate, thus we divide by 9x/40 on both sides to get 80x/9x = Rate, the x cancels out, and we get 80/9 Miles per hour.
CF is a radius = 7.5 units
To find GC we will use the Pythagorean theorem.GC² = 10² + 7.5²
GC² = 100 + 56.25GC² = 156.25GC = √ 156.25GC = 12.5
GF = 12.5 + 7.5 = 20
Answer: 20 units
Answer:
2/9 = 0.22
Step-by-step explanation:
There are two ways to pick the first number odd and less than 5: 1 and 3.
With each of these, the second number drawn can be 1, 2, 3, 4, 5, 6, 7, 8 or 9.
This makes 18 total possibilities.
Out of these, the only ways to have a sum less than 5 are 1 and 1, 1 and 2, 1 and 3, and 3 and 1. This is 4 ways out of 18:
4/18 = 2/9 = 0.22
