Y=7-4x-4x²
find maximum

the answer is (1/2,8)

rewrite y=7-4x-4x^2 as y=-4x^2-4x+7

a=-4, b=-4, c=7

x=-(-4)/2(-4)  

x= -1/2

plug -1/2 in for x    

-4( -1/2)^2-4( -1/2)+7

y=8

Step-by-step explanation:

Hope this helped

10/60

step-by-step explanation:

if you divide 10 by 60 the answer is 0.166666 while if you divide or solve the other problems it equals 0.6

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