The owner of an office building is expanding the length and width of a parking lot by the same amount. The lot currently measures 120 ft by 80 ft, and the expansion will increase its area by 4,400 ft2. By how many feet should the length of the parking lot be increased?
A=lw

Question

14-06-2017
Mathematics

contestada

The owner of an office building is expanding the length and width of a parking lot by the same amount. The lot currently measures 120 ft by 80 ft, and the expansion will increase its area by 4,400 ft2. By how many feet should the length of the parking lot be increased?
A=lw

Respuesta :

Otras preguntas

nutrients from digested food enter the blood stream through which process?

Write the expression as the sine, cosine, or tangent of an angle. sin 57° cos 13° - cos 57° sin 13° Select one: a. cos 70° b. cos 44° c. sin 44° d. sin 70°

Which qualifications are unique to the Science and Math pathway? Select all that apply. 1.ability to lean new information and skills quickly 2.mechanical knowle

what is fez? plzz help ☺

Which of the following is another way to express the equation 16 = -9 + z?

Tomochichi’s trip to England with James Oglethorpe was important because A) the English wanted to meet Oglethorpe’s Native American friends. B) it showed the g

Which best describes the climax of the Odyssey? A. Odysseus enters his house disguised as a beggar. B. Odysseus reveals his true identity and takes his place as

Choose regular or irregular for the past tense verb form below. fanned regular irregular

Describe the meaning of the rate. 6 days each month A. Something happens 6 days per month. B. Each month is 6 days long. C. Each day is one month long. D. A da

Which kind of injury occurs most often in fireworks accidents? contusions burns concussions broken bones

Queenashley121232 Queenashley121232 · Answer 1 · 2017-06-14T22:58:52+02:00

The best and most correct answer among the choices provided by your question is the second choice or letter B "20".

The current area is 120(80)=9600 and he want to expand it by 4400 so that the new area will be 9600+4400=14000

14000=(120+x)(80+x)

14000=9600+200x+x^2

x^2+200x-4400=0

x^2-20x+220x-4400=0

x(x-20)+220(x-20)=0

(x+220)(x-20)=0, since x is an increase it must be greater than zero so

x=20ft

(120+20)(80+20)=14000ft^2

The owner of an office building is expanding the length and width of a parking lot by the same amount. The lot currently measures 120 ft by 80 ft, and the expansion will increase its area by 4,400 ft2. By how many feet should the length of the parking lot be increased? A=lw

Respuesta :

Otras preguntas

The owner of an office building is expanding the length and width of a parking lot by the same amount. The lot currently measures 120 ft by 80 ft, and the expansion will increase its area by 4,400 ft2. By how many feet should the length of the parking lot be increased?
A=lw