Answer: Train A = 50 mph; Train B = 30 mph
Step-by-step explanation:
In this case, let's call the speed of both trains as:
Va: speed of train A
Vb: speed of train B
As train A is faster than train B, let's call speed of train B as X; So if Vb is X, then Va would be:
Vb = X
Va = X + 20
If we combine both Speed, we have:
V = Va + Vb = X + X + 20 = 2X + 20
Now that we have an expression for the combined speed, let's recall the formula for speed in general:
V = d/t
Where:
d: distance = 240 miles
t: time = 3 hours
Combining all the data we have:
V = 240/3
but V is 2X + 20 so:
2X + 20 = 240/3
Solving for X:
2X + 20 = 80
2X = 80 - 20
2X = 60
X = 60/2
X = Vb = 30 mph
Now that we know speed of one train, we can know the speed of the other train:
Va = 30 + 20 = 50 mph
Answer:
first 5y-4y does not equal 9y.
second 3x-x is 2x but he put 3.
Step-by-step explanation:
Math - Answered Sun.Sept.19.2021
If It Helped Please Rate And Heart.
Answer:
No
Step-by-step explanation:
2√3 × 2√6
= 4√18
= 4√9*2
= 4( 2√2)
= 8√2
Just multiply the numbers under the radical together. √3 × √6 = √18. √18 can be written as √9*2, or 3√3.
√2 is irrational, so the answer will be irrational
Answer:
C
Step-by-step explanation:
the equation of the parabola is : y = x² - 3x
the equation of the line is y = x + 1
and the shaded area is between those graphs
therefore y ≥ x² - 3x and y ≤ x + 1
Answer:
SAS, SSS, AAA
Step-by-step explanation:
Because Im bored X D
