John has four more quarters than dimes. if he has $5.20 in quarters and dimes, how many of each type coin does he have?

John has 16 quarters and 12 dimes

Step-by-step explanation:

Quarters are worth $0.25 each and Dimes are worth $0.10 each.

Let number of dimes John has be   and number of quarters he has be

This is Equation 1.

This is Equation 2.

Now, substituting Equation 1 into Equation 2 and solving for q gives us:

There are 16 quarters.

Now using this fact, we use this value in Equation 1 to get the number of dimes.

There are 12 dimes.

Hence, John has 16 quarters and 12 dimes.

step-by-step explanation:

we can use this expression to calculate the energy gain as a particle moves with a field or the energy loss as it moves against it. (note that it is also used to define the electron-volt, a unit of energy equal to that gained by an electron as it falls through a pd of 1 v, i.e. w = 1 ev = 1.6 10-19 c 1 v = 1.6 10-19j).in fact this expression is really nothing more than the statement that potential is the potential energy per unit charge. in this case, v= w/qis simply stating that the change in potential energy(or work done) per unit charge is equal to the change in potential (or potential difference), v.student questions: uniform electric fields2electron beamcathode+5 kvanode0 v