londahbbupza
londahbbupza londahbbupza
  • 02-10-2016
  • Mathematics
contestada

rob is 5 years older than john,mark is twice as old as john the total of their ages is 65

Respuesta :

SamreenAmdani SamreenAmdani
  • 02-10-2016
John is 15
Rob is 20
Mark is 30

x = John's age
x + 5 = Rob's age 
2x = Mark's age

x + x + 5 + 2x = 65
4x + 5 = 65
-5           -5
4x = 60
/4     /4
x = 15
15 + 5 = 20
2(15) = 30
Answer Link

Otras preguntas

how do you write 2,049,000 in expanded form
3.7 times 9.4 show work
PLEASE HELP MEthank you, and 15 points!!Gretchen and Ezia received equal scores on a test made up of multiple choice questions and an essay. Gretchen got 18 mul
1 inch of rain per year or less in grassland? Is this a lot or a little of rain?
When you weigh yourself, are you actually reading the support force acting on you, or are you really reading your weight?
fructuse, sucrose, and starch are all examples of ? carbohydrates, lipids,nucleic acids or proteins?
Which types of proteins help defend the body against foreign agents like bacteria?
Can a change in matter take place in which energy is neither released nor absorbed?
How did Benjamin Banneker uses Rhetorical strategies to argue against slavery?Be specific Thank you,
53°c below zero is what