Deediebaby Deediebaby
  • 02-01-2016
  • Mathematics
contestada

What two numbers add up to 45 and multiply and get 121

Respuesta :

Billymkhoi
Billymkhoi Billymkhoi
  • 02-01-2016
Let the two numbers be x and y.

We have x+y=45
⇒ y= 45-x.

The two numbers multiply and get 121, so we have another equation:
x*y = 121 (1)

Plug y= 45-x in (1), we have:
x* (45-x)=121
⇒ 45x - x^2 = 121 (distributive property)
⇒ x^2 - 45x = -121 (multiply -1 on both sides)
⇒ x^2- 45x + 121= 0
⇒ x= 42.128 or x= 2.872

y= 45- 42.128= 2.872
or y= 45- 2.872= 42.128.

Because it does not matter what number, x or y, is larger, the two numbers are 2.872 and 42.128.

Hope this helps~


 
Answer Link

Otras preguntas

What is the overall equation for cellular respiration?
If there are 4boys and 2girls in a family, what is the ratio of boys in the family to children in the family?
What is the literary style of Gulliver's Baubles?
Also need help with this
A farmer kept 96 kilograme of animals feed inhis barn the barn leaked and 1/10 of the feed was waisted , how mych animal feed was left
In the excerpt above, “twenty centuries” is a reference to _____.
what emphasizes the reliance on only observable entities in order to come up with lawsA:SOCIOLOGICAL THEOREMB:RATIONALITYC:POSITIVISMD:REALISM
How did abolitionists influence Lincoln’s decision to issue the Emancipation Proclamation? by pressuring him to take a stand on slavery by threatening to
nutrient level required to maintain energy and growth what is it called
what was an economic benefit of the industrial revolution