Kevin is 3 times as old as Daniel. 4 years ago, Kevin was 5 times as old as Daniel. How old is Daniel now? PLEASE ANSWER ASAP

K = 3 D

( K − 4 ) = 5 ( D − 4 )

 k-4=5d-20

5D-k=20-4

5D-3D=16

2D=15

D=8

therefor Daniel has to be 8

Daniel is 8 years old now.

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make sure you have version 2.50

try looking in the very back of the book : )

step-by-step explanation:

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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