lamprinincl lamprinincl

25-05-2022
Mathematics

contestada

Ahmad is twice as old as Bobby. John is 7 years younger than
Ahmad. If the sum of their age is 38, how old are the three boys?

Respuesta :

sreanpanhaseth sreanpanhaseth

25-05-2022

Answer:

Let

a be the age of Ahmad

b be the age of Bobby

c be the age of John

a=2b

b=a/2 (1)

a-7=c(2)

a+b+c=38(3)

substitute 1 and 2 into 3

a+a/2+a-7=38

(5/2)a=45

a= 45×2/5

a=18

then b= 18/2= 9yrs

c= 18-7= 11yrs

Answer Link

Otras preguntas

Egyptian leader who laid the foundation for modern Egypt

Can you help me with -5x^2+18x+8? (Its number 34.)

(MC)The Fourteen Points reflected Woodrow Wilson’s belief in which political movement? Imperialism Populism Isolationism Progressivism

Which of the following is a possible long-term consequence of two organisms occupying the same niche?

a gardener digs a flower bed that is 8 meters long and half a meter wide. what is the area of the flower bed?

What is 6 and 3/4 add 1 and 6/7? Write answer as a mixed number thanks! Next Question: What is 9 and 1/5 takeaway 2 and 7/8? Write the answer as a mixed number

The number, 6.022 x 1023 is known as a ___.

What does each letter in E=MC2 mean?

Without drawing, tell how many different rectangles have an area of 5 square units. Explain.

A catering service offers 5 appetizers, 8 main courses, and 7 desserts. A banquet chairperson is to select 3 appetizers,4 main courses, and 4 desserts for a ba