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

What is a number that has a digit in the tenths place, hundredths place, or beyond

Dontrelle recieved 30% off when he purchased a rare book regularly priced at $96.50.How much did Dontrelle pay?

How does Executive Order 9066 affect Japanese Americans?

At 88°F, a certain insect chirps at a rate of 64 times per minute, and at 97°F, they chirp 118 times per minute. Write an equation in slope-intercept form that

name three commoly eaten food made by plants or animals that provide stored energy for for embryos

Find the length of Cable 1. Find Cable 2 bridge span. Find Length of Cable 2

A certain insect can beat its wings 250 times per second. Write an equation in slope-intercept form that shows the relationship between flying time in seconds a

The equation R=-0.0028t+20.8 can be used to predict the world record in the 200-m dash, where R is the record in seconds and t is the number of years since 1920

Help me find the answer for problem number 5

Orange taxi charges $2.75 as soon as you step in the taxi and $2.50 per mile .Write a function?