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
forsale [732]
3 years ago
7

A first number plus twice a second number is 24. twice the first number plus the second totals 21. find the numbers.

Mathematics
1 answer:
Ulleksa [173]3 years ago
4 0
We do like the following:
Set the first number is a and the second is b.
We have two equations: a+2xb=24, 2xa+b=21
And we have 2xa+4xb=48 or 2xa=48-4xb
So: 48-4xb+b=21 or -3xb=21-48=-27 and we got b=-27:(-3)=9 and a= 6
a=6 and b=9
You might be interested in
Easy math asap please
Mekhanik [1.2K]
Answer: The answer is D:)
8 0
3 years ago
Read 2 more answers
What is the angle of DBC
Licemer1 [7]
When added, these two angles are supplementary, meaning that their sum is 180. This means that we can do the following to find x, and eventually DBC:

3x+67+4x+50=180
Simplifies to:
7x+117=180
Then by the Subtraction Prop. of Equality:
7x=63
Then divide by 7 on both sides to get that x=9.

We then substitute 9 into angle DBC.
4(9)+50
=36+50
DBC=86

:)

8 0
3 years ago
What is the name of the type of data that a scatterplot is used to analyze?
earnstyle [38]

Answer:

Bivariate Data :)

5 0
3 years ago
What kind of triangle is Triangle CED categorized by side lengths?
Dmitry_Shevchenko [17]
I believe there has to be an image included with this question my friend. Thine error hath been made known by the supreme lord of dao.
7 0
3 years ago
Determine whether the cost for ordering multiple items that will be delivered is sometimes, always or never proportional. Explai
Tanzania [10]
It could sometimes be proportional. The reasoning here is that if all the items have different prices it won't be, however if the items you are ordering all have the same price they will be!
5 0
3 years ago
Other questions:
  • Can a greatest integer function be part of a piecewise defined function?
    15·1 answer
  • Kevin makes 78.37 per day . How much does he make in 7 days
    12·1 answer
  • Graph this equation: y-3=1/2(x+2).
    14·1 answer
  • What are the values of the three trigonometric ratios for angle L, in simplest form?
    14·2 answers
  • A cup of chocolate chips is 9 ounces a recipe calls for 3 and 3 4ths of ups how much ounces of chocolate are needed
    8·1 answer
  • 30 Points
    8·2 answers
  • What is an equation of the line that passes through the points (6,4) and
    10·1 answer
  • A mountain road rises 10 feet over a 206-foot run. What is its slope?
    15·1 answer
  • A select choice are. definition A or. definition B
    6·1 answer
  • Please help!!! Which system of inequality’s is shown below???!!! Use picture below to help you! ;)
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!