kiwilime27otjnhr kiwilime27otjnhr
  • 23-07-2017
  • Mathematics
contestada

The length of a rectangular photo is 3 cm less than twice its width. If the area of the photo is 104 square cm, Find the length and width of the photo.

Respuesta :

texaschic101
texaschic101 texaschic101
  • 23-07-2017
A = L * W
A = 104
L = 2W - 3

104 = W(2W - 3)
104 = 2W^2 - 3W
2W^2 - 3W - 104 = 0
(2W + 13)(W - 8) = 0

2W + 13 = 0
2W = -13
W = -13/2 .....this will not work, extraneous solution

W - 8 = 0
W = 8 <== width

L = 2W - 3
L = 2(8) - 3
L = 16 - 3
L = 13 <===length

Answer Link

Otras preguntas

The mathematics department of a college has 14 male professors, 11 female professors, 14 male teaching assistants, and 9 female teaching assistants. If a perso
explain the impact of migration on socio-economic and environmental aspect?​
Calculate the percentage of the total number of fynbos species that are bulbous herbs. Show all your working.​
Fill in the table using this function rule. y = 3+4x
number of Ca2+ and Br− ions required to form a neutral ionic compound
The change in the value of a stock is represented by the rational number 6.10 describe in words what this means.
Moving to another question will save this response. Question 4 In John Keats's "Ode on a Grecian Um," what is a priest doing in one scene on the urn? O conducti
what figures of speech is this that are striking terror into the hearts of all and sundry ​
In paragraph 4, what does Jefferson say about the treatment of the colonists under the king of Great Britain? According to Jefferson, what justifies a revolt ag
This is a solid that is formed during a chemical reaction, typically in solution.