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

If a person earns $19,850 per year , estimate that persons hourly salary ..please give me details and how you rounded

Estimate the total weight of two boxes that weigh 9.4 and 62.6 pounds using rounding and compatible numbers. which estimate is closer to the actual total weight

how do oceanographers get to the bottom of the ocean?

Charlie has x state quarters. Ty has 3 more quarters than Charlie has. Vinnie has 2 times as many quarters as Ty has. Write and simplify an expression to show h

what is 7/9 as a decimal terminating or repeating decimal

What is essential for blood clotting?

Which expression could be a calculator’s display for the number 0.00000000000096? A. 9.6e13

how did Japan's feudal system impact society?

what is 62.6 rounded to the nearest tenth

factor completely if the polynomial is not factorable write prime also state the methods used to factor the polynomial. 1. x^2-12x+36 2. r^3-81r 3. 35x^3y