taviabedonie101 taviabedonie101
  • 02-10-2018
  • Mathematics
contestada

Janet is 3 yrs older than her sister julie. Janet brother is eight yrs younger than their sister julie. The sum of all their ages is 55 yrs

Respuesta :

tramserran
tramserran tramserran
  • 02-10-2018

Janet: x + 3

Julie: x

brother: x - 8

Janet + Julie + brother = sum

x + 3  +   x     +   x - 8    =  55

3x - 5 = 55

    +5   +5

3x      = 60

[tex]\frac{3x}{3} = \frac{60}{3}[/tex]

x = 20

Janet: x + 3   ⇒   (20) + 3   = 23

brother: x - 8   ⇒   (20) - 8   = 12

Answer: Janet=23, Julie=20, brother=12

Answer Link

Otras preguntas

Please HELP with inequality and graph. !!!!!!
A baby is admitted to the hospital with a history of projectile vomiting after each feeding. On examination, it is found that the sphincter controlling food pas
Chlorine has two stable isotopes, Cl-35 and Cl-37. If their exact masses are 34.9689 amu and 36.9695 amu, respectively, what is the natural abundance of Cl-35?
It takes 10 workers 24 hours to do a job. How does y vary with x − directly or inversely? What is the coefficient of variation?
the function g is defined by g(x)=3k-5x, where k is a constant. find k, if the graph of g passes through the point (3,11).
Plzzzz answer I need help
How many different strings can be formed by rearranging the letters in the word troposphere?
One of these students is randomly selected what is p(a/b)?
Which of the following is an example of Batesian mimicry? A) an insect that resembles a twig B) a butterfly that resembles a leaf C) a nonvenomous snake that lo
What's the surface area?