joelsebastian785 joelsebastian785
  • 17-06-2020
  • Mathematics
contestada

One year ago, a man was 8 times as old as his son. Now his age is equal to the square of his sons age. The present age of son is

Respuesta :

Iset2309
Iset2309 Iset2309
  • 17-06-2020

Answer:

The present age of son is 7

Step-by-step explanation:

Let the son age be x

One year ago

Son's age = x - 1

Therefore man's age = 8(x-1) =8x - 8

Now man's age = x^2

Difference between both ages if man =1 years

So

x^2 -(8x-8) = 1

x^2-8x + 8-1 =0

x^2- 8x + 7 = 0

x^2 - 7x -x + 7 = 0

X(x-7) - 7 ( x - 7) = 0

(x - 1) ( x - 7) = 0

x = 1, 7

But son cannot be 1 years

Therefore ,

x = 7

SO,

age of son is 7

age of father is x×7=49

Answer Link

Otras preguntas

in radishes, red and white are pure-breeding colors, while hybrids are purple. if a red radish is crossed with a white radish, what will be the phenotype of the
the value of the expression 12×(5+25)
32000 subtract 19500
On which industry do the economies of Caribbean Nations most heavily rely?
Why is punctuation important in business communication?
Online French class
How did art in Russia change after the :CONVERSION:
What is the solution set of y = x2 + 2x + 7 and y = x + 7?
Who were slaves in the islamic trade?
Jonathan is baking several loaves of bread to sell it is Bakery he use 9 cups of waters and 12 cup of whole wheat flour . How much water was use per cup of flou