I'll mark you as the brainiest if you get this correct thx xxx This homework is due tomorrow thx sm for your help Please show you working

700

Step-by-step explanation:

3x + x = 80

4x = 80

x= 20

there are 60 fictional books and 20 nonfiction.

since each fiction book is 10, the total cost of 60 is 600.

and nonfiction books are 5 each because half the price. so 20*5 = 100

Helen will receive 700.

all the angles opposite to the angle 150 would be 150 and all the angles that are next to 150 are 30 because they equal 180 it you add it up.

step-by-step explanation:

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