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
noname [10]
3 years ago
6

Please help me. I need how to do the problem too

Mathematics
1 answer:
MatroZZZ [7]3 years ago
5 0

Answer: Choice A.  (8, 4)

==========================================================

Explanation:

Because x = 2y, we can replace every copy of x with 2y

Let's do so in the second equation

3x - 4y = 8

3(x) - 4y = 8

3(2y) - 4y = 8 .... x replaced with 2y; now let's isolate y

6y - 4y = 8

2y = 8

y = 8/2 ..... divide both sides by 2

y = 4

Use this y value to find x

x = 2y

x = 2*4

x = 8

So we have x = 8 and y = 4 pair together to get the answer (x,y) = (8, 4) which is choice A.

You might be interested in
Which numbers are​ rational?
QveST [7]

Answer:

0 is a rational number.

-7 is a rational number.

10 is a rational number.

Step-by-step explanation:

Not sure about the rest but these numbers I know for a fact are 100% rational.

3 0
3 years ago
For breakfast, Randy had two Egg McMuffins and a hash brown, to taling 750 calories . Jack only had on e Egg McMuffin and a hash
Delvig [45]
Let us assign variables.
Let x = egg mcmuffins
Let y = hash brown

Randy had:
2x + y = 750

Jack had
x + y = 450

Using systems of linear equation, we can get the value for x and y by elimination. Subtract the equations.
2x + y = 750
x + y = 450
--------------
x = 300

Get y
x + y = 450
300 + y = 450
y = 150.

So there are 300 calories for McMuffins and 150 calories for hash brown.
4 0
3 years ago
The first thing you should do in solving a word problem is estimate what you think the answer would be.
Lelu [443]

Answer:

The answer is True.

Step-by-step explanation:

  • <u>Estimate the Answer Before Solving Having a general idea of a ballpark answer .</u>
  • <u>Or the problem lets students know if their actual answer is reasonable or not.</u>
6 0
2 years ago
Alex is using synthetic division to divide x^3+4x^2-43x-10 by x-5 <br><br> Which answer is correct?
pantera1 [17]

Answer:

The answer to your question is: The second option is correct

Step-by-step explanation:

Data

                         x³  +  4x²  -  43x  -  10 by  x-5

Synthetic division

                       1        4      -43       - 10             5

                                5        45         10                                                        

                        1       9         2           0

  Result                   x² + 9x + 2

8 0
3 years ago
Maria is installing gutters on her rectangular shed that measures 10 ft by 9 ft she has 23 ft of gutter already and need to purc
Paha777 [63]

Answer:

Maria needs 3 lengths of gutter of finish the shed.

Step-by-step explanation:

We need to calculate the perimeter of the rectangular shed to know how much  5 feet gutter is needed.

The perimeter of the shed is p = 2(l + b) where l = 10ft and b = 9 ft

p = 2(10 + 9) = 2(19) = 38 ft

Now, the perimeter of the shed also equal 23 ft of gutter already installed plus 5x ft gutter where x = number of gutters.

So 23 + 5x = 38

collecting like terms, we have

5x = 38 - 23

5x = 15

dividing through by 5 we have

5x/5 = 15/5

x = 15/5

x = 3

So, Maria needs 3 lengths of gutter of finish the shed.

8 0
3 years ago
Other questions:
  • In the number 913,256 what is the period that has the digits 913
    10·2 answers
  • Use _________ to isolate the variable. A reciprocals B subtraction C an expression D inverse operations
    9·1 answer
  • How do u simplify this?<br> 4r-3+6s-8r-(4s-6)
    9·1 answer
  • Is it true that square roots can be compared and ordered by comparing and ordering the numbers underneath the radical symbol?
    6·1 answer
  • What is the slope of a line parallel to a line with slope 2/3
    5·1 answer
  • Help me please?! its math question
    7·1 answer
  • If John ran a 40 yard dash, how far did he run in decimeters?​
    6·1 answer
  • I love you so you have to help me pleas plz
    10·2 answers
  • Enter your answer
    9·1 answer
  • A couch priced at $300 is on sale for 40% off. What is the sale price of the couch?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!