Answer:
<em>The slowest train goes at 86 mph and the fastest train goes at 96 mph.</em>
Step-by-step explanation:
<u>Distance and Speed</u>
Assume x is the speed of the slowest train, therefore the speed of the fastest train is x+10.
The distance is calculated as:
d = vt
Where v is the speed and t is the time.
The distance traveled by each train in 5 hours is:
Slowest: 5x
Fastest: 5(x+10)
The sum of both distances is 910 miles:
5x + 5(x + 10) = 910
Operating:
5x + 5x + 50 = 910
10x = 910 - 50 = 860
x = 860/10
x = 86
The slowest train goes at 86 mph and the fastest train goes at 96 mph.
Answer:
a= 37
Step-by-step explanation:
All the angles of a triangle add up to 180° so if you add 110 with 35 it equals 145, then subtract 145 by 180 and you get 37
Answer:
Step-by-step explanation:
<h3>Given</h3>
- f(x) = 2^x + 5x and g(x) = 3x - 5
<h3>To find </h3>
<h3>Solution</h3>
- (f+ g)(x) =
- f(x) + g(x) =
- 2^x + 5x + 3x - 5 =
- 2^x + 8x - 5
Answer:
(4,1)
Step-by-step explanation:


Answer:
Step-by-step explanation:
Twelve
You are correct, but I have a small comment.
As far as I can see, you have both 12 and 13 correct. The short way to do 12 is just to divide 72 into 360
360 / 72 = 5
The more general formula is 360 / central angle = # of sides.
What the question means is that if your start with a polygon (it is a regular polygon by the way), and rotate it around its center, how many sides does it have in order that when you go through 72 degrees, the figure looks like it did when you started.
If the polygon is completely unmarked, then the idea is that it will look like you haven't done anything to the polygon even though you have rotated it 72 degrees.
The way you did 13 is exactly how it should be done.