25-01-2015
Mathematics

Answered

the tens digit of a two digit number is twice the units digit. The sum of the digits is twelve. Find the original number.

Verified Answer :

konrad509 konrad509

25-01-2015

x - tens digit
y - units digit

\(x=2y\\ x+y=12\\\\ 2y+y=12\\ 3y=12\\ y=4\\\\ x=2\cdot4\\ x=8\\\\ 10\cdot8+4=\boxed{84}\)

Answer Link

Related Questions

What are wetlands a where water covers the plants b where water covers the road c where water covers the animals d where water covers the land

Which phrase describes the algebraic expression r9 A The product of r and 9 B The quotient of r and 9 C 9 less than r D r more than 9

What does canopy mean as it is used in the sentence The green canopy overhead filtered out most of the sunlight but just enough flickered through to create a d

The Human heart pumps 750 gallons of blood in 9 hours A human kidney filters 100 gallons of blood in 6 hours how many more gallons does the human heart pump tha

Which phrase characterizes the perspective most investors had of the stock market in the first half of 1929

Which statements are true about the agricultural revolution Choose all answers that are correct A It occurred only in regions where rivers flooded regularly B H

A triangular sail has two sides the same length The third side is 9ft shorter than either of the equal sides The perimeter of the sail is 63 ft How long is the

the volume of a cube is 729 cubic inches what is the area of the cube face

What fear does Madison express in this passage It has been objected also against a bill of rights that by enumerating particular exceptions to the grant of powe

of RS3x1 ST2x2and RT64find the value of x

Web Analytics Made Easy - Statcounter