1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
zvonat [6]
3 years ago
5

The sum of the digits of a two-digit number is 9. If the digits are reversed,the new number is 9 more than the original number.F

ind the original number.
Mathematics
1 answer:
hodyreva [135]3 years ago
4 0

Answer:

45

Step-by-step explanation:

Let the original number be xy where y is unit and x is tens hence original number is 10x+y When reversed, the new number is yz hence 10y+x

We know that the original number plus 9 is the reversed number hence

10x+y+9=10y+x

9y-9x=9 which when simplified we obtain that

y-x=1 equation 1

Originally, we are told that the sum of x and y is 9 hence

y+x=9 equation 2

Solving equation 1, it means y=x+1

Substituting the above into equation 2

x+1+x=9

2x=9-1

2x=8

x=8/2=4

Since y=x+1 then y=4+1=5

Therefore, the original number, xy is 45

You might be interested in
One third of fifteen is
diamong [38]

Answer:

Its 5

Step-by-step explanation:

15/3 is 5. Goodluck man

7 0
3 years ago
Read 2 more answers
The Pyraminx is a Rubik's cube-type toy in the shape of a tetrahedron. The Pyraminx shown below has edges 15\,\text{cm}15cm long
____ [38]

Answer:

8.727

Step-by-step explanation:

Since the below edge, d = 15 cm, and the height, h = 12.2 cm, we will use the Pythagorean  theorem to find the distance r.

d^2=r^2+h^2

(15)^2 = r^2+(12.2)^2

r^2 = (15)^2-(12.2)^2=225-148.84=76.16

r=\sqrt{76.16}=8.727

4 0
3 years ago
Uri wants to buy a sweatshirt that
AfilCa [17]

Answer:

Take 16.28 x 8%. You get $1.30 so add 16.28 to 1.30 to get 19.58

Step-by-step explanation:

8 0
3 years ago
Which of the following contains all of the irrational numbers in the set
horsena [70]

Answer:

d

Step-by-step explanation:

in ''d)'', all the numbers are irrational

3 0
2 years ago
The mass of a baby is 3.4kg, correct to 1 decimal place. What is the minimum mass of the baby?​
Sloan [31]
3.35kg is minimum and max is 3.44kg
8 0
2 years ago
Other questions:
  • 40x/64ydivided by 5x/8y=
    14·1 answer
  • Which set of points includes all of the solutions for y = negative three halves times x plus two? line going through 0 comma 2 a
    6·1 answer
  • Solve the given inequality and graph the solution on a number line. -x/3 + 5/2 < 2/2.
    15·1 answer
  • An angle bisector of a triangle divides the opposite side of the triangle into segments 1.5 cm and 1 cm long. A second side of t
    6·1 answer
  • PLEASE HELP, I WILL MARK BRAINLIEST
    7·1 answer
  • Help please! I’ll give brainliest!
    10·2 answers
  • Find the equation of a line that passes through the points (1,-3) and (3,-4).
    9·2 answers
  • What is y-x=10 as a polar equation
    8·2 answers
  • 8. A circle has a radius of 7.2 inches. Which is the
    10·1 answer
  • What is the geometric mean between 7 and 12
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!