Answer: 779881734320
Step-by-step explanation: Just multiply the two. If you can’t multiply, use a calculator.
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)
Answer:
y=3x
Step-by-step explanation:
that is literally all
Step-by-step explanation:
ID = 801 720 6270
Pas = 1234
Jôîn frm zøôm app
If I had to guess that it mean -4x + 6y = -18 and y = -2x+21:
Since we have a y =, we can plug that in.
-4x + 6(-2x + 21) = -18
-4x -12x + 126 = -18
-16x = -18 -126
-16x = -144
-16x/-16 = -144/-16
x = 9
