Multiply all of the numbers together: 5 x 2 x 8 = 10 x 8 = 80 ways
105/1760 = x/60
105 yards per minute over 1760 (number of yards in a mile) is equal to X (solving) over 60 (the number of minutes in an hour)
x = 3.579 = 3.58 miles per hour.
The equation for the volume of a sphere is V=4
Now, simply insert the value of the radius (5) into the equation, and solve it. When you do that, you should end up with approximately 523.6 (rounded) I hope that helps! :)
Answer is 40
-5(-1-7)
-5(-1 + -7). Keep change change
-5( -8)
40. Negative times negative equal positive
Since the first car travels 55 miles per hour and starts an hour early, by 4:00 it is 55 miles away from the other car. Therefore, the equation is 55+a(some value)+b(another value)=380. If a car travels 55 miles per hour, that means that we add 55 for each hour and 55*x (if x is the number of hours) is the distance traveled. We have accounted for the first hour, so this is similar to saying that they start 55 miles away at 4:00 and go from there. For the other car, since it travels 75 miles per hour, its distance in hours is 75*x (the amount of time spent should be the same if we start at 4:00). Therefore, since they travel away from each other, our total distance is 55+55x+75x=380. Subtracting 55 from both sides (and combining like terms), we get 130x=325. Next, we divide both sides by 130 to get 2.5 hours, or 2 hours and 30 minutes