Let a, b,c, d are non zero integers. show that each of the following is rational number:a/b+c/d

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.

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol

provide more details to solve it

step-by-step explanation:

if e is the midpoint of bd, then bd is 14.

step-by-step explanation: