Suppose that this person drives at r mph going to the mountains, and gets there in 12 hours. Returning, this person drives at (r+20) mph and gets home in 8 hours. We don't know the distance yet, but can solve for the initial speed, r, by setting
d = 12r = (r+20)(8). Solving for r, r=40 mph (going) and (40+20)mph = 60 mph (returning. Since d=12 r, d = (12 hrs)(40 mph) = 480 miles (answer).
Answer:
i think its 21/x-4
Step-by-step explanation:
sorry if im wrong
I am going to do number 2 so when you subtract decimals you have to add two zeros like this 10.00 or 0.25 so now when you subtract you get $9.75
Answer:
$25 + (0.25 * 30)
Step-by-step explanation:
Given that :
Cost of Uber :
Pick up fee = $25
Additional charge = 0.25 cent per mile driven
Cost of 30 mile trip :
Pickup fee + (additional charge * number of miles)
$25 + (0.25 * 30)
25 + 7.5
= $32.5
Since the sphere is located at the center and has radius 5.
Out of the following given points,
(5,5,-5) will lie on the sphere, where x and y coordinates will be positive and z coordinate will be negative.
This is because the radius of the circle is 5 units.
