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
gregori [183]
3 years ago
12

The digit in the tens placeof a two digit is three times that in the units place. if the digits are reversed , the new no will b

e 36 less than the original number .Find the original no.
pls help
Mathematics
1 answer:
Charra [1.4K]3 years ago
6 0

If a number's ten digit is x and the units digit is y, then you can write the number as 10x+y.

Obviously, inverting the digits would lead to the number 10y+x.

Since this new number is 36 less than the original, we have

10y+x = 10x+y-36 \iff 9x-9y=36\iff x-y=4

Since we also know that the digit in the tens place is three times that in the units place, we can add an equation to form a system:

\begin{cases}x-y=4\\x=3y\end{cases}\iff 3y-y=4\iff y=2

And thus x=2\cdot 3=6

You might be interested in
In ΔJKL, j = 93 cm, k = 82 cm and l=86 cm. Find the measure of ∠J to the nearest degree.
zhuklara [117]

Answer:

5

Step-by-step explanation:

Answer:

85t

Step-by-step explanation:

1. Volume of a cone: 1. V = (1/3)πr2h 2. Slant height of a cone: 1. s = √(r2 + h2) 3. Lateral surface area of a cone: 1. L = πrs = πr√(r2 + h2) 4. Base surface area of a cone (a circle): 1. B = πr2 5. Total surface area of a cone: 1. A = L + B = πrs + πr2 = πr(s + r) = πr(r + √(r2 + h2))

hope this helps

8 0
2 years ago
Read 2 more answers
A laundry basket contains socks in several different colors. black 70 white 26 red 4 What is the probability that a randomly sel
Gnom [1K]

Answer:

70/100

Step-by-step explanation:

You have 70 White socks

You have to add 70, 26, and 4.

When you add those, you get 100, making the answer 70/100

4 0
2 years ago
Read 2 more answers
Is 25x²-40xy+16y²a perfect square number? why?​
Crank

Answer:

yes

Step-by-step explanation:

25x² - 40xy + 16y² can be factored as

(5x - 4y)² ← a perfect square

8 0
1 year ago
Let X, the number of flaws on the surface of a randomly selected boiler of a certain type, have a Poisson distribution with para
kvasek [131]

Answer:

(a) 0.932

(b) 0.0653

(c) 0.032

(d) 0.316

(e) 0.251

Step-by-step explanation:

From the table with mean parameter μ = 5, we can compute the following cumulative and density probability

(a) P(X \leq 8) = 0.932 (cumulative)

(b) P(X = 8) = 0.0653 (density)

(c) P(9 \leq X) = 1 - P(X \leq 9) = 1 - 0.968 = 0.032 (cumulative)

(d) P(5 \leq X \leq 8) = P(X \leq 8) - P(X \leq 5) = 0.932 - 0.616 = 0.316 (cumulative)

(e) P(5 < X < 8) = P(X \leq 8) - P(X \leq 5) - P(X = 8) = 0.932 - 0.616 - 0.0653 = 0.251

5 0
3 years ago
Which is larger 10cm:1mm
kogti [31]
1 mm

Km etc
Hm etc
Dam etc
M    0.001
Dm 0.01
Cm 0.1
MM 1
7 0
3 years ago
Other questions:
  • Molly is painting her bedroom walls, and the paint costs $24 per gallon. How much does the paint cost per quart?
    12·2 answers
  • Three sides of a triangle measure 10m, 12m, and 18m. Find the largest angle of the triangle to the nearest degree.
    15·1 answer
  • A circle has a circumference of 12 it has an arc of length 11 what is the central angle of the arc in degreesA circle has a circ
    13·2 answers
  • What is the sum of (5x - 10) and (-X + 8) ?
    12·1 answer
  • What is 0.8% as a fraction in simplest form?
    8·2 answers
  • Rectangle A has a length of 6 and width of 4. Rectangle A prime has a length of 9 and width of 6.
    10·2 answers
  • S + 2.5s + 2.5s - 3.3 =
    6·2 answers
  • What is 2/7 into a percent
    15·2 answers
  • Dan sleeps 8 hours each day. Write a simplified expression for the number of
    15·1 answer
  • 75,15,3 find the 6th term
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!