dylandouglas5396 dylandouglas5396

03-11-2017
Mathematics

contestada

"the sum of the digits of a two-digit number is 13. reversing the digits produces a number that is 9 less than the original number. what is the original number?"

Respuesta :

tynollette tynollette

03-11-2017

suppose the one's digit is x, the ten's digit is y. the original number is 10y+x, the reversed number is 10x+y

x+y=13
(10x+y)=(10y+x)-9 =>9y-9x=9 =>y-x=1
Add the two equation to solve: 2y=14 =>y=7
x=13-7=6
the original number is 76.

Answer Link

Otras preguntas

A student throws a baseball upwards at an angle of 60 degrees to the horizontal. The initial horizontal and vertical components are 12.5 m/s and 21.7 m/s, respe

The reciprocal effect refers to media-induced change that is counter to the desired change. A. True B. False

please help me for 50 point

Should literature of the past be rewritten in present-day language for today's readers?

make sure to write the (#,#)

What is the mass of a crate if a net force of 12 N gives the crate an acceleration of 0.20 m/s2?

¿como se debe hacer un argumento?

How did charitable organizations attempt to alleviate the suffering felt during the Great Depression? Select all that apply. free housing soup kitchens bread li

Do you think it would benefit people to be aware of their own carbon footprint? Why or why not?

At room temperature, one of the molecules is a gas and one is a liquid. Identify which structure is a gas and which is a liquid.