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

Chemical weathering is the breakdown of rocks, soils, and minerals through _______. A. Atmospheric or biologically produced chemicals b. Atmospheric conditions

Please help! I attached a picture below

What did i do wrong?

What is the process of cellular respiration represented by? A. Sun ----> Food B. Food ----> ATP C. ATP ----> Muscle Activity D. All of the above

Why are religious laws important.

Can the world change

Despite having religious problems, what generalization can be made due to immigration in America? A. We tend to have religious wars in America. B. As a whole,

The following are the temperatures in °C for the first 14 days of January: 7 , − 4.5 , − 2 , 0 , 2.5 , 1 , − 5 , − 0.5 , 3 , − 5.5 , 4 , 2 , − 3 , 4.5 What is t

Find f(2) if f(x)=(x+1)^2

What is the domain of the square root function graphed below? y 8 B 4 2 -8 -6 4 2 4 8 8 -2. -2 х 4 -6 -8 X> 1 Ο Ο Ο x 1 Ox>3