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

A nature center offer 2 guided walks. The morning walk is 2/3 miles. The evening walk is 3/6 mile. Which is shorter

How many molecules of sucrose C12H22O11 are there in 454 grams of sucrose

sum is 17 and their difference is 3

How might a utilitarian person respond to the magistrate and the mob?

For what type of equity loan are you lent a lump sum, which is to be paid within a certain period of time? A. A line of credit B. Equity C. A second mortgage

Use the vertical line to test

{0,1,2,3,4,5,6,20,21,22,23,24,25} the distribution is considered to be: skewed the right, skewed the left, not skewed?

In a class, there are 12 girls. If the ratio of boys to girls is 5:4 how many boys are there in the class

the ph of carrots are 5.0 how it is classified A.ACIDIC B.BASIC C.INDICATOR D.NEUTRAL

Background Information: This is an article by Will Irvin, a correspondent for the New York Tribune. Irvin wrote this piece in April 1915, while reporting from t