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

During the Antebellum period, religion was used by many Americans to

3x2+2+299999999999999999999999

whtas the purpose of the united nations

To neutralize all the negative charge from an object, simply touch it with _________. A) a positively charged object B) an object that has no charge C) anoth

In reading, the tone an author develops helpsA. tell the reader foreshadowed informationB. prepare the reader for predictionsC. create the mood or feeling for t

How many times greater is the hydronium ion concentration in rainfall (pH = 5.0) compared to pure water (pH = 7.0)? a.) 100 times b.) 1 time c.) 1000 times

Lauren is a student in your class who has autism. During group activities or unstructured time, Lauren becomes very antagonistic with her peers and teacher. Wha

What is the common ratio of the geometric sequence below? -2, 4, -8, 16, -32... a. -4/2 b. -2/4 c. 2/4 d. 4/2

Fo The Beneath The Formative-phase Differ from Each Other ?

Which of the following is true of education in 1950