Can you all help me ? Please this is my test grade

I only have 15 minutes to finish

(x+2)+(x-6)=16

Step-by-step explanation:

the center of the circle is (h, k)

In this case it's (-2,6)

the radius is 4 which is known as r

the formula is: (x-h) + (x-k)= r^2

then you just plug it in

i can try and you the very best that i can.

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.