Answer:
it take 1/7 km in 1 hour then,
1 km it take 7 hours
so, it cover 5 km in 35 hours
1/7 km ------- 1 hour
1km ------- 7 hour
5km -------( 5*7) == 35 hours
Using the magic of algebra!:
The time each train goes in 1 hour will be represented as a / b.
b is 30 more than a, so if we add 30 to a it should equal b.
a + 30 = b
In three hours, the trains are 330 miles apart.
Esentially, we're adding up the distance each train goes from the starting point to find the distance between them.
3b + 3a = 330
Now we have a system of equations to solve.
a + 30 = b
3b + 3a = 330
We want to get the variables on seperate sides of the equation for easy solving.
a + 30 = b
3b = 330 - 3a
Then get the value of the one variable the same so we can use the transitive property.
a + 30 = b
b = 110 - a
a + 30 = 110 - a
2a + 30 = 110
2a = 80
a = 40 mph
(And thus b = 70 mph)
I encountered this problem before but it had choices. If this problem had these choices:
<span>A) 2 and 5
B) 3 and 5
C) 4 and 5
Then the correct answer is A) 2 and 5.
We will use the tangent ratio.
tan</span>Θ = opposite/adjacent
tan 22° = 2/5
0.404 = 0.40
Thus the two numbers that represent the lengths of the legs of the right triangle are 2 and 5.
Answer:
This means that there were 45 total problems.
Step-by-step explanation:
To find the total number of problems, add all of the different categories together.
Total = Himself + With Sal + Left
Total = 23 + 13 + 9
Total = 45
It's really easy just divide 800/50
the answer is 16 times
