Answer:
77.5 mph and 82.5 mph
Step-by-step explanation:
Let's say the speeds of the trains are x and x + 5.
The combined distance traveled by the trains is 480 miles.
480 = x × 3 + (x + 5) × 3
480 = 3x + 3x + 15
480 = 6x + 15
465 = 6x
x = 77.5
The speeds of the trains are 77.5 mph and 82.5 mph.
We can model the problem as follows: on a number line we put train A, with positive speed , at the origin x=0.
At x=480 we put train B, with negative speed .
So, the equations for the positions of the two trains are
We know that , so we can rewrite the first equation:
The two trains meet when they are at the same position:
We know that this happens after 3 hours, i.e. when t=3:
And since train A was 5 mph faster, we have
Number of Pieces
Strawberry
Pineapple
Orange
Grape
What is the theoretical probability that Zoe will choose an orange flavored piece from the bag?
Answer:
fahsjdnc îți was daad
Step-by-step explanation:
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555 17.517.517, point, 5
888 282828
121212 424242
Write an equation to describe the relationship between ccc, the number of cranes, and ttt, the total time in minutes.
Answer:
t = 3.5c
Step-by-step explanation:
The correct table is attached in the image below. Since the papers are being folded at a constant rate, there is a linear relationship between c, the number of crane and t, the total time in minutes.
We can find the equation of this linear relation using any two pair of points from the table. Using the first two points: (5, 17.5) and (8, 28)
First we need to find the slope of the line which gives the relation between the two variables.
y coordinates represents the dependent variable which is the time in this case and x coordinates represents the independent variable which is number of cranes in this case. Using the values from the two points we considered:
Thus, the equation of the line will be of the form:
t = mc + b
m is the slope here. Using its values, we get:
t = 3.5c + b
b is known as y-intercept. We need the value of b to complete the equation. Substituting the value of t and c from any pair we can find the value of b.
Using the point (5, 17.5), we get:
17.5 = 3.5(5) + b
b = 0
This means, the equation of the line would be:
t = 3.5c
Answer:
t=3.5c
Step-by-step explanation:
Answer:
a series of numbers or quantities in geometric progression.
Step-by-step explanation:
Answer:is a series with a constant ratio between successive terms
Step-by-step explanation: