Question 3
A student solved a quadratic equation as shown here:
2x2 + 5x = 12
x(2x + 5) = 12
x= 12or 2x + 5 = 12
2x
x= 12or 2x + 5 - 5 = 12 - 5
x= 12or 2x = 7
x= 12or x=7/2 <--supposed to be fraction
X = 7/2,12
Explain the errors in the process. Then correct the errors, and solve the equation.

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.

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

maya’s expression will generate the wrong sum because she violated the commutative property.

step-by-step explanation: