The width of a rectangle is 18 in less than its length. if the area of the rectangle is 1440 in^2, find the dimensions of the rectangle

Length: L

width: L - 18

Area (A) =L x w

   1440 = L(L - 18)

  1440 = L² - 18L

       0 = L² - 18L - 1440

       0 = ( L + 30)( L - 48)

0 = (L + 30)    0 = (L - 48)

   L = -30         L = 48              

Since length cannot be negative, disregard -30

L = 48

width: L - 18  = 48 - 18  = 30

width=30 in, length=48 in

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!

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.