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laila [671]
2 years ago
14

-5x-9=-3x-9 solve for x

Mathematics
1 answer:
andrey2020 [161]2 years ago
3 0

-5x-9 = -3x -9

Add 3x to both sides:

-2x -9 = -9

Add 9 to both sides:

-2x = 0

Divide both sides by -2:

x = 0

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x^2-y=7 and y-5x=-11 The system of equations above has two solutions. The solution in Quadrant 1 is (A,B) and the solution in Qu
dimaraw [331]

By solving the system of equations, we can see that the solutions are:

(A, B) = (4, 9)

(C, D) = (1, -6).

<h3>How to solve the system of equations?</h3>

Here we have the following system of equations:

x^2 - y = 7

y - 5x = -11

If we isolate the variable y in both equations, we get:

y = x^2 - 7

y = -11 + 5x

Now we can equate these two to get:

x^2 - 7 = -11 + 5x

now we have a quadratic equation, this can be rewritten as:

x^2 - 7 + 11 - 5x = 0

x^2 - 5x + 4 = 0

Using the quadratic formula, we will see that the solutions are:

x = \frac{5 \pm \sqrt{(-5)^2 - 4*1*(4)} }{2*1}

Solving that we get:

x = \frac{5 \pm \sqrt{(9} }{2} \\\\x = \frac{5 \pm 3}{2}

So the two solutions for x are:

x = (5 + 3)/2 = 4

x = (5 - 3)/2 = 1

Evaluating the second equation in these x-values we get:

y = -11 + 5*4 = -11 + 20 = 9

y = -11 + 5*1 = -6

Then we have the coordinate pairs: (4, 9) (on the first quadrant) and (1, -6) on the fourth quadrant.

Learn more about systems of equations:

brainly.com/question/13729904

#SPJ1

8 0
1 year ago
Which describes the correct way to convert minutes to hours?
Goshia [24]

Answer:

Divide the number of minutes by 60.

Step-by-step explanation:

7 0
3 years ago
Factor 2x^2 - 6x + 4 completely
katovenus [111]

Answer:

Step-by-step explanation:

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Factor

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6 0
3 years ago
Read 2 more answers
Can someone tell me the answer?
Sedaia [141]
You just have to divide the decimals
7 0
3 years ago
When 27 times x squared times z all over negative 3 times x squared times z to the fourth power is completely simplified, the ex
snow_lady [41]
Isolate z by itself:

\frac{z}{z^4}

To simplify variables with powers, subtract the smaller power from the bigger power:

4 - 1 = 3
\frac{z}{z^4} = \frac{1}{z^3} = z^{-3}

The exponent will be -3.
4 0
3 years ago
Read 2 more answers
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