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

A scientist wants to raise the temperature of a 0.10-kilogram sample of glass from –45°C to 15°C. How much heat energy is required to produce this change in te

How to do 103,727,495 in expanded form

What is 1/3 of 9 if u know please tell me thanks

What problems brought on the tariff debates of 1827 and 1828? In what way did the South respond to northeastern demands for a higher tariff, and on what did the

write down everything you know about the equation y=mx+b. you should include what this general equation represents,as well as what each of the different letters

A 1/4 turn clockwise

How do I convert negative 3 over 5 to a decimal

43.586 rounded to the nearest hundredth

what the rational numbers equivalent to 6/9

50/7 as a mixed number