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AURORKA [14]
3 years ago
6

Solve the system by the substitution method.

Mathematics
1 answer:
Ghella [55]3 years ago
8 0

Answer:

A) The solution set is (6,-8).

Step-by-step explanation:

3x - y = 26

-3x       - 3x        Subtract 3x from both sides

-y = -3x + 26     Divide both sides by -1

y = 3x - 26

Now plug this into 7x + 8y = -22 to solve for x

7x + 8(3x - 26) = -22        Distribute

7x + 24x - 208 = -22       Combine like terms

31x - 208 = -22

     + 208    + 208            Add 208 to both sides

31x = 186                           Divide both sides by 31

x  = 6

Plug this into y = 3x - 26 to solve for y

y = 3(6) - 26           Multiply

y = 18 - 26              Subtract

y = -8

If this answer is correct, please make me Brainliest!

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In the graph shown, at what value of x does the value of y change from increasing to decreasing or decreasing to increasing?
kotykmax [81]

Answer:

Your original answer is corrrect

Step-by-step explanation:

At X= -1, Y decreases and then it rises back to -1 and continues to increase

3 0
3 years ago
Can you help me with this word problem?​
dangina [55]

Answer:

The ratio of flour to sugar is 2:1

Step-by-step explanation:

Let f = weight of a bag of flour

Let s = weight of a bag of sugar

3f+2s = 32

4f = 32

We have 2 equations and 2 unknowns, we can solve

4f=32

Divide by 4

4f/4 = 32/4

f = 8

Each bag of flour weights 8 pounds

Substitute this back into the first equation

3(8) +2s = 32

24+2s = 32

Subtract 24 from each side

24-24 +2s =32-24

2s = 8

Divide by 2

2s/2 = 8/2

s = 4 pounds

Flours weighs 8 pounds and sugar weights 4 pounds

We want the ratio of flour to sugar

Flour: sugar

8:4

We can divide each side by 4

8/4: 4/4

2:1

4 0
3 years ago
Does the graph represent a function?<br> Help Help pls
earnstyle [38]

Answer:

No

Step-by-step explanation:

I am right. Trust me.

8 0
2 years ago
Read 2 more answers
Help me please......
lisov135 [29]

Answer:

i believe it would be -3

Step-by-step explanation:

9 + -12 = -3

3 0
2 years ago
The answer to the length of x is in mm. please help!
romanna [79]

Answer:

3.69 mm

Step-by-step explanation:

So it's a right triangle so you can use a^2+b^2=c^2

Plugging in what we know the equation becomes:

2.8^2+2.4^2=c^2 (C = x because x is the hypotenuse)

7.84+5.76=c^2

13.6=c^2

The square root of 3.68782 which rounds to 3.69

So x=3.69mm

4 0
3 years ago
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