Thatonedude897 Thatonedude897

03-11-2020
Mathematics

contestada

Mary is five times as old as Fred. In three years Mary will be 4 times as old as Fred. Find their present ages?

Respuesta :

karun26 karun26

03-11-2020

ans

here let mary age be x and fred be y

1st equation

x= 5y

2nd equation

x+3 =4(y+3)

now from 1st equation putting value of x in equation 2

x+3 = 4y+12

5y+3 = 4y +12

y = 9

so fred is 9 and mary is 45

Answer Link

Otras preguntas

How many days are there between january 29th and may 16th?

What is also known as a visual aid in a presentation? A: Background B:Animation C:Review D:Slide

Which of these men was leading physician of the time and helped found the first american antislavery society signed the declaration of independence?

true or false a $10 increase for a $100 item is a larger percent change than a $10 increase for a $1000 item ?

In at least 150 words, compare the effectiveness of the U.S. government in meeting the needs of citizens to that of another form of government?

Someone help please - area of circles!

China has a ____ government

Sophia used 4/8 yards of string. She used 1/6 of the string for a school project how many yards of string did she use for her project A. 5/6 B. 1/3 C. 1/12 D.

Which event did friedman describe as the beginning of the dot com boom and bust?

If the exchange rate for mexican pesos has changed from 10 pesos to 9 pesos per dollar, _____. the value of the peso has increased the value of the peso has not