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
podryga [215]
3 years ago
11

The units digit of a two-digit exceeds twice the tens digit by 3. The sum of the digits is 6. Find the number

Mathematics
1 answer:
tekilochka [14]3 years ago
8 0

Answer:

51

Step-by-step explanation:

y is the ten digit

and x the ones digit

y+x=6 -> x=6-y subtracted each side by y

2y+3=x

2y+3=6-y they both equal x so the equal each other

add y to both side to get rid of the y

minus 3 form both side to get rid of the 3

3y=3

y=1

plug it in

2(1)+3=x

5=x

51

You might be interested in
Graph x = -2<br> Kfkdjfjdjdjf<br> Ifidjfjdjjfjfj
Darya [45]

Answer:

This is a vertical line, that passes through x=-2

Step-by-step explanation:

This is a vertical line, x=-2 means that no matter what value has 'y' the variable 'x' will be -2.

Watch the attached picture

5 0
3 years ago
A sample of 10 adult elephants had an average weight of 12,556 pounds. The standard deviation
kirill [66]

Answer:

The 99% confidence interval of the population mean for the weights of adult elephants is between 12,475 pounds and 12,637 pounds.

Step-by-step explanation:

We have the standard deviation for the sample, so we use the t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 10 - 1 = 9

99% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 9 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.99}{2} = 0.995. So we have T = 3.25

The margin of error is:

M = T*s = 3.25*25 = 81

In which s is the standard deviation of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 12,556 - 81 = 12,475 pounds

The upper end of the interval is the sample mean added to M. So it is 12,556 + 81 = 12,637 pounds.

The 99% confidence interval of the population mean for the weights of adult elephants is between 12,475 pounds and 12,637 pounds.

6 0
3 years ago
While driving from his home to his workplace, Chris has to pass through two traffic lights. The general probability of getting a
Margarita [4]
A and B are dependent events.
The general probabilities of each event to happen separately is 36% for event A and 25% for event B. When considering that Chris passes one before passing the other, indicates that whether he gets the first light open or not will affect if he gets the other one also open or not. This can even be seen by noticing how the probability of Chris getting both red lights is 9%, a much inferior probability then considering both lights separately which means that one event has influence over the other.
4 0
3 years ago
The diameter of a circle is 3 1/2m, what is the radius?
iogann1982 [59]

Answer:

1,75 m

Step-by-step explanation:

The radius is by definition half of the diameter and so the half of 3.5 m is 1.75 m

6 0
3 years ago
Read 2 more answers
What units of distance are in the metric system? How are they related?
yaroslaw [1]

Answer:

The most common units of distance In the metric system of measurement,  are millimeters, centimeters, meters, and kilometers.

4 0
3 years ago
Other questions:
  • Which of the following
    5·1 answer
  • دریافت رمزدوم کارت عابربانک ملت بهاره تبری
    5·1 answer
  • A division equation that has solution of 1,350
    7·2 answers
  • Graph the equation. Identify the vertex and the axis of symmetry.
    14·1 answer
  • IM TAKING AN EXAM HELPPPP!!!!
    14·1 answer
  • The sum of two numbers is 68 if four times the smaller number is subtracted from the larger​ number, the result is 3 find the tw
    6·1 answer
  • In ΔEFG, the measure of ∠G=90°, the measure of ∠E=40°, and EF = 75 feet. Find the length of GE to the nearest tenth of a foot.
    14·1 answer
  • Perform the indicated operation. y^2 + 3y-10/3y+15 divided (10-5y)
    9·1 answer
  • Circle X is shown in the diagram.
    9·2 answers
  • What is the solution to the equation below. Round your answer to two
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!