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GenaCL600 [577]
3 years ago
5

Need help with this question

Mathematics
1 answer:
Mashcka [7]3 years ago
6 0
For this question, you would want to set up a system of equations. 

Let x = Dog Food
Let y = Cat Food

5x+2y=20
x+4y=13

The next step is to eliminate a variable or do substitution. I personally find elimination easier. To eliminate the y, multiply the top equation by -2.

-10x-4y=-40
x+4y=13

The y's will cancel and you are left with:

-9x=-27
Divide by -9 on  both sides and you get x=3. Now you want to take 3 and substitute it back into one of the original equations. 

3+4y=13
Solve for y

4y=10
y=2.5

Plug both values into the top equation to check the values.

5(3)+2(2.5)=20
15+5=20
20=20

The answers are correct. Dog food is 3 dollars or euros and cat food is 2.50 euros. 

Please mark brainiest and good luck :D

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snow_tiger [21]

Answer:

x       y

15     -1

12     0

9       1

6       2

3       3

0       4

Step-by-step explanation:

This is a function table. For a linear function, find the average rate of change between the listed points called slope. Then use the slope to fill in other inputs and outputs for the function.

m = \frac{y_2-y_1}{x_2-x_1}=\frac{4-0}{0-12} =\frac{4}{-12} =- \frac{1}{3}

This means for every 3 units made in the input, the function moves down 1 output.

x       y

15     -1

12     0

9       1

6       2

3       3

0       4

6 0
4 years ago
How do you split up a triangle evenly
Oduvanchick [21]
I think you can cut it from the top of it to make one more?
7 0
3 years ago
F<br> (<br> x<br> )<br> =<br> 3<br> x<br> −<br> 12<br> f(x)= <br> 3x−12<br> ​
Nina [5.8K]

The inverse of the given function 3x - 12 is determined as f⁻¹(x) = x/3 + 4.

<h3>What is inverse of a function?</h3>

An inverse of a function is a function that serves to replace another function.

That is, if f(x) produces y, then putting y into the inverse of f produces the 0ut-put x .

Thus, an inverse function or an anti function is defined as a function, which can reverse into another function.

The inverse of the given function; f(x)= 3x − 12 is calculated as follows;

y = 3x - 12

replace y with x and x with y as shown below;

x = 3y - 12

now, solve for y

x + 12 = 3y

divide both sides of the equation by 3

x/3 + 12/3 = 3y/3

x/3 + 4 = y

f⁻¹(x) = x/3 + 4

Thus, the inverse of the given function 3x - 12 is determined as f⁻¹(x) = x/3 + 4.

Learn  more about inverse of a function here: brainly.com/question/3831584

#SPJ1

The complete question is written below:

find the inverse of the function, f(x) = 3x - 12

8 0
2 years ago
Please help me please :(
aleksklad [387]

Answer:

18

Step-by-step explanation:

There is a string that is 3 yards long that is divided into pieces that are 1/6 of yard long.  Divide the total length by the length it was divided into to find the number of pieces.

When dividing with fractions, the second number will be inverted and multiplied by the first number.

3 ÷ (1/6) = 3 × 6 = 18

You will have 18 pieces

8 0
3 years ago
Which statement desribes why the system has two solutions y=6x^2+1 and x^2+4​
pav-90 [236]
I Think The answer is a I hope it helps Message Me if I’m wrong and I’ll change My answer and fix it for you
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3 years ago
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