The amount it costs (c) to fill a tank of gas is directly related to the number of gallons put in (g). which of the following equations can be used to find the constant of variation (m)?

c/g = m

m/g = c

m/c = g

g/c=m

First option.

Step-by-step explanation:

It is important to remember that Direct variation equations have the following form:

Where "k" is the Constant of variation.

In this case, knowing that "c"  represents the amount it costs to fill a tank of gas, "g" represents the number of gallons put in and "m" is the Constant of variation, we can write the following equatio:

Then, in order to find the constant of variation "m"; we must solve for "m".

Dividing both sides of the equation by "g", we get the following equation:

recall your d = rt, distance = rate * time.

let's say we have two trains, A and B, A is going at 85 mph and B at 65 mph.

they are 210 miles apart and moving toward each other, at some point they will meet, when that happens, the faster train A has covered say d miles, and the slower B has covered then the slack from 210 and d, namely 210 - d.

When both trains meet, A has covered more miles than B because A is faster, however the time both have been moving, is the same, say t hours.