1.) the length of a rectangle is twice the width. the perimeter is 36 feet. find the
length and width
unknowns:
= width
= length
write an equation and solve: (remember that perimeter is 21 + 2w.)
width= length =

Width = 6.

Length = 12.

Step-by-step explanation:

2L + 2W = 36 where  W = width  and L = the length.

Since  L = 2W , substituting:

2*2W + 2W = 36

6W = 36

W = 6

so L = 2*6 = 12.

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.

c

-by-step explanation:

it would be c