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
EleoNora [17]
3 years ago
8

One number added to twice another number is 13. Four times the first

Mathematics
1 answer:
Karo-lina-s [1.5K]3 years ago
6 0
Let's call the first number x, and the second number y. Putting what you have said into equation form:

x+2y=13
\\\\4x+2y=-2


Subtracting one equation from another gives:

x+2y=13 \\-(4x+2y=-2)

\\\\-3x=15
\\x=-5

If x = -5,

x+2y=13
\\(-5)+2y=13
\\2y=18
\\y=9

So the first number is -2, the second number is 9
You might be interested in
Only a very small (<5) percentage of measurements can be more than 2 standard deviations from the mean of the normal distribu
horsena [70]

Answer:

A. True

Step-by-step explanation:

The empirical rule in statistics states that:

  • 68% of the data will be within 1 standard deviation
  • 95% of the data will be within 2 standard deviations
  • 99.7% of the data will be within 3 standard deviations

So yes, we can state that 5% or less of the data will be more than 2 standard deviations away from the mean. Of course, statistics is not 100% certain, so this rule is not 100% right all the time. Some exceptions might result, but generally speaking, the results should follow the empirical rule.

5 0
3 years ago
Read 2 more answers
What's the sum for 329+252
HACTEHA [7]

Answer:

581

Step-by-step explanation:

3 0
3 years ago
The sum of two numbers is 54. The smaller number is 18 less than the larger number. What are the numbers?
igomit [66]

Answer:

The larger number is 37.  This makes the smaller number 56 - 37, which is 19.

Step-by-step explanation:

 

The first step is to pick variables for the two numbers.  Lets call the smaller number x and the larger number y.

Since the sum of the two numbers is 56, this means that x + y = 56.  Let's call this equation 1 and save it for later.

 

The next sentence says:

The smaller number is 18 less than the larger number.  So, 18 less than the larger number would be y - 18.  So, the smaller number must be equal to this, so

 

x = y - 18

 

Replace the x in equation 1 with y - 18

 

x + y = 56

(y-18) + y = 56   (replace x with y-18)

2y - 18 = 56        (add the y's)

2y = 74               (add 18 to both sides)

y = 37                 (divide both sides by 2)

 

So, the larger number is 37.  This makes the smaller number 56 - 37, which is 19.

 

Hope this helps!!  :)

8 0
2 years ago
A spinner is divided into 8 equal sections, and each section contains a number from 1 to 8. What is the probability of the spinn
alukav5142 [94]

Answer:

more than likely none

Step-by-step explanation:

because the is no number higher than 8 that can go into 8 evenley

8 0
3 years ago
Read 2 more answers
Someone helppppp mee please !
Alchen [17]
<span>Area = (1/2)(533 ft)(525 ft) sin(53) = 111739 square feet</span>
4 0
3 years ago
Other questions:
  • Need some help please!
    13·1 answer
  • The measure of an obtuse angle is greater than 0 and less than 90 degrees 90 degrees greater than 90 and less than 180 degrees
    9·2 answers
  • The product of some negative number and 4 less than twice that number is 286 find the number
    7·1 answer
  • Rhonda has 335 stamps in her collection. She wants to collect at least 575 stamps. Write and solve an inequality to determine ho
    13·1 answer
  • A survey shows that 67%of peanut butter lovers prefer chunky-style.Out of 300 people surveyed, how many can be predicted to say
    8·1 answer
  • If Sally has two apples and Greg has three how many apples do they have in total
    12·1 answer
  • X^2y^-1 + y / a-xy^-1
    15·1 answer
  • What is the perimeter of a 30°-60°-90° triangle that has a long leg of 9?
    7·2 answers
  • Any helpp? someone....?
    10·1 answer
  • What is the maximum number of relative extrema contained in the graph of
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!