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
ss7ja [257]
3 years ago
7

The sum of the digits of a two digit number is 9 When the digits are reversed the number increases by 9. Find the number.

Mathematics
1 answer:
Jet001 [13]3 years ago
6 0

Answer:45

Step-by-step explanation:

Let the unit place be ‘x'

Tenth place be y

The number is 10y+x

x+y = 9 (according to the condition) (1)

Digits are interchanged Unit place' y ‘& tenth place ‘ x'

New no is 10x +y

This is 9 more than the original number

10x+ y = 10y+x +9

10x-x+y-10y = 9

9x-9y= 9

x-y = 1 (dividing by 9) (2)

Adding the two equations

2x = 10

x= 5

Substituting the value of x in first equation

y = 4

The number is 45, the original number is 54 this is 9 more of the new number.

Ans :45

You might be interested in
I will mark you Brainliest just help me
Alika [10]

Answer:

The first one is proportional and the second one is not. Because for the first one you can see that if you divide the number of pens by the cost you'll get the same answer for every single one. But for the second one if you divide the number of minutes by words typed you get a different answer for each one. You can also see if it's proportional or not if you draw it on the graph and it's a straight line. If it is the relationship is proportional if it isn't it's not proportional. Hope that makes sense :)

7 0
3 years ago
Read 2 more answers
What is value of 5 in 2 500.7
umka21 [38]

Answer:

500

Step-by-step explanation:

Since the 5 is in the hundreds place in the number 2500.7, its value is 5 * 100 = 500.

6 0
2 years ago
Read 2 more answers
Which is the graph of the sequence defined by the function f(x + 1) = Three-fifthsf(x) when the first term in the sequence is 37
nadezda [96]

Answer: On a coordinate plane, 4 points are plotted. The points are (1, 375), (2, 225), (3, 135), (4, 81).

Step-by-step explanation:

We have the relation:

f(x + 1) = (3/5)*f(x)

such that the first term is 375

Then:

f(1) = 375.

Using the above relation, we have that:

f(1 + 1) = f(2) = (3/5)*f(1) = (3/5)*375 = 225

Then we have the pair (2, 225)

The next term is:

f(2 + 1) = f(3) = (3/5)*f(2) = (3/5)*225 = 135

Then we have the pair (3, 135)

the next term is:

f(3 + 1) = f(4) = (3/5)*f(3) = (3/5)*135 = 81

Then we have the pair (3, 81)

Then the correct option is the first one; On a coordinate plane, 4 points are plotted. The points are (1, 375), (2, 225), (3, 135), (4, 81).

9 0
3 years ago
Read 2 more answers
1. Calculate the variance of the set of data to two decimal places.
kkurt [141]
Hdjdjdhbdbehebebrhehhwywhegdjjfhf
7 0
3 years ago
Anyone know this answer?
s344n2d4d5 [400]
The average salary is $18,725

To find the answer add up each job's salary then divide by the number of jobs.

28,700 + 18,600 + 14,66 + 13,00 = 74,900

Then divide 74,900 by 4 ( added 4 numbers )
6 0
3 years ago
Other questions:
  • 9 meters higher than altitude X
    6·1 answer
  • Factorise 6x²-14x-12​
    11·1 answer
  • There are 38 tables at the fifth grade picnic at a local park. There will be 182 students attending the picnic. The parents were
    12·1 answer
  • Given that f(x) = x2 + 2x + 3 and g(x) = quantity of x plus four, over three , solve for f(g(x)) when x = 2.
    14·2 answers
  • Which statements are true? Select three options
    6·2 answers
  • Is the equation <img src="https://tex.z-dn.net/?f=-2x%5E2%2B8%3Dy" id="TexFormula1" title="-2x^2+8=y" alt="-2x^2+8=y" align="abs
    10·1 answer
  • What is gcf of 50 and 24
    8·2 answers
  • Under a dilation of a scale factor of 1/2 centered at (7,5), SM becomes HG. Determine the coordinates of HG
    8·1 answer
  • Justin is on a road trip. Over the past 2 days, he has driven a total distance of 715 miles at an average speed of 65 miles per
    7·1 answer
  • Lateral surface for a triangular prism l=8 w=4 h=6
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!