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Julli [10]
3 years ago
13

8х + 7y= -5 X= -3y - 7

Mathematics
2 answers:
GrogVix [38]3 years ago
4 0

Answer:

x = 2

y = -3

Step-by-step explanation:

Step 1: Write systems of equation

8x + 7y = -5

x = -3y - 7

Step 2: Solve for <em>y</em>

  1. Substitute 2nd equation into 1st: 8(-3y - 7) + 7y = -5
  2. Distribute 8: -24y - 56 + 7y = -5
  3. Combine like terms: -17y - 56 = -5
  4. Add 56 to both sides: -17y = 51
  5. Divide both sides by -17: y = -3

Step 3: Solve for <em>x</em>

  1. Substitute <em>y</em> to find <em>x</em>: x = -3(-3) - 7
  2. Multiply: x = 9 - 7
  3. Subtract: x = 2

Step 4: Check

<em>Plug in x, y into an original equation to verify it's a solution.</em>

2 = -3(-3) - 7

2 = 9 - 7

2 = 2

Inessa05 [86]3 years ago
4 0

Answer:

x=2  y=-3

Step-by-step explanation:

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Anastaziya [24]

Answer:

14

Explanation:

The constant of proportionality is 14, when we divide all of the y values by all of the x values, we get 14.

hope this helps!

8 0
2 years ago
Please help!! thank you
shutvik [7]

Answer: 5

Step-by-step explanation:

f(x)=3-x

f(-2)=3-(-2)

f(-2)=3+2

f(-2)=5

Hope this helps!! :)

Please let me know if you have any question

8 0
3 years ago
Use a graphing calculator to solve the equation 3 tan 1/3 (theta) =8 in the interval 2 to pie.
abruzzese [7]
The answer to this may be C
3 0
3 years ago
How does f(x) = 3* change over the interval x = 4 to x = 57
Vilka [71]

f(x) increase by a factor of 3

Explanation:

        Given that f(x)= 3* and the interval is x=4 to x=57

        Now we put the value for x is 4 to 57 then value of f(x) increase with the multiply of 3.

        Because the x is multiplied with 3 i.e., 3*

        So f(x) increase by a factor of 3.

        If we put x=4, then f(x)= 12     (∵ 3×4=12)

        If we put x=5, the f(x)= 15       (∵ 3×5=15)

        If we put x=6,the f(x)= 18             (∵ 3×6=18)

similarly., values of x= 7,8,9,...155.

        Then,

        If we put x=56, the f(x)=168

        This process will continue until f(x)=171 for x=57.

6 0
3 years ago
Find the EXACT circumference and area of a circle that has a radius of 6 cm. (use pi for )
irina [24]
Circumference of circle = 2 pi r
= 2 x 3.14 x 6
= 6.28 x 6
= 37.68 cm

Area of circle = pi r^2
= 3.14 x 6^2
= 3.14 x 36
= 113.04 cm^2
5 0
3 years ago
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