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

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500