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
Fudgin [204]
3 years ago
9

1. The sum of a two-digits number is 13. The tens digit is 8 less than twice the units digit. What is the number?

Mathematics
1 answer:
alexgriva [62]3 years ago
3 0

Answer:

<u>The number is 67</u>

Step-by-step explanation:

<u>Equations</u>

Let's consider the number 83. The tens digit is 8 and the unit digit is 3. Note the tens digit's addition to the number is 80, and the unit's addition is 3. This means the tens digit adds 10 times its value, that is, 83 = 8*10 + 3.

Now, let's consider the number ab, where a is the tens digit, and b is the unit digit. It follows that

Number=10*a+b

The question gives us two conditions:

1) The sum of a two-digits number is 13.

2) The tens digit is 8 less than twice the units digit.

The first condition can be expressed as:

a + b = 13                     [1]

And the second condition can be written as:

a = 2b-8                      [2]

Replacing [2] into [1], we have:

2b-8 + b = 13

Operating:

3b = 13 + 8

3b = 21

Solving for b:

b = 21 / 3 = 7

Substituting into [2]:

a = 2*(7) - 8 = 6

Thus, the number is 67

You might be interested in
Write an equation in standard form for:
Tasya [4]
Hello!
When finding the perimeter of a rectangle, you have to consider the properties of a rectangle. A rectangle has two pairs of equal sides where one is the width, while the other one is the length. 
Now looking back at your question, it says "... a rectangle that is x units wide" ⇒ you let the width = x ; this is the same with "y units long" ⇒ length = y. Perimeter can just be : P = 24.  
Therefore,
The equation would be:
x + x + y + y = P. 
2x + 2y = P.
(Sub in P = 24)
∴ 2x + 2y = 24. (This should be your answer.)
:) Good luck (Message me if you have any problem)








5 0
3 years ago
155 students are going on a field trip. Each bus can carry 42 students. If every bus except the last one carry's as many student
kotykmax [81]
3 buses x 42 = 126... So the final bus will carry 155-126=29 students.... Mental Math.
3 0
3 years ago
Read 2 more answers
A receptionist named Eve spends 5minutes routing each incoming phone call. In all,how many phone calls does Eve have to route to
Sati [7]

7, because 35 divided by 5=7

5 0
3 years ago
Read 2 more answers
Question
Gnoma [55]

Given parameters:

     y varies directly as w;

   This interpreted implies that as y increases, we increases by a certain factor or amount;

    So,  y ∝  w

           y  = kw

   where k is the constant of proportionality

Now, given that y  = 8 and w = 2

Input in the equation to solve for k;

               8 = k x 2

     Solving k gives, k = 4

Now to the second part,

          if v is directly proportional to w;

                v  = k w

        So   v  = 4w

The equation that relates v to w is v = 4w

3 0
3 years ago
What is the slope of y=5x-4
evablogger [386]

Answer:

y=5x-4

slope (m)=5

Explanation:

y=mx+b

m is the slope

b is the y-intercept

since the 5 is in the m, the slope would be 5.

7 0
3 years ago
Other questions:
  • G=15yx for x<br> how do you solve it​
    8·2 answers
  • 1.) Use the formula SA=6s², where SA is the surface area and s is the edge length of the cube, to solve this problem. The cube h
    8·1 answer
  • A theater technician charges a $200 flat fee and 5% of all profits from ticket sales per show. If the technician made $400.00 on
    10·1 answer
  • Solve the equation x^(2)-x=5x-25 over the complex numbers. Simplify the answer. Show your work.
    14·1 answer
  • Which table represents the function y = -3x + 2?
    10·1 answer
  • Find the length of BC. Round your answer to the nearest tenth.
    6·1 answer
  • For the following problem ,form two equations n solve them to find the two numbers
    12·1 answer
  • A 6-sided die is rolled. What is the probability of rolling a 3 or a 5?
    15·1 answer
  • What is the y-intercept of the graph below?
    12·1 answer
  • Y = (x)^(1/9)*Find f(x) when x=(1/2)Round your answer to the nearest thousandth.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!