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anygoal [31]
4 years ago
8

Solve the equation 5x + 9 =2x - 36

Mathematics
2 answers:
lesya692 [45]4 years ago
8 0

Answer:

x=-15

Step-by-step explanation:

First, write the equation.

5x+9=2x-36

Next, get ride of a variable on both sides before the actual numbers (it makes solving a lot easier).

5x+9=2x-36

<u>-2x    -2x</u>

3x+9=-36

Subtract 9 on both sides.

3x+9=-36

    <u>-9   -9</u>

3x=45

Divide by 3 on both sides to isolate x.

3x=-45

<u>/3   /3</u>

x=-15

Hope this helped you out...have a great day c:

mariarad [96]4 years ago
6 0

Answer:

x = -15

Step-by-step explanation:

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The side of a cube is increasing at a rate of 2 kilometers per hour. At a certain instant, the side is 1.5. What is the rate of
Arisa [49]

Answer:

dV/dt = 13,5 [Km³/h]

Step-by-step explanation:

The volume f the cube is:

V = x³                 where x is a side of the cube, then tacking derivatives with respect to  time on both sides of the equation

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3 0
3 years ago
What is the value of x? Round to the nearest tenth, if necessary. X = 4 x = 5 x = 6. 2 x = 9. 4.
expeople1 [14]

You can use the Pythagoras theorem to get the value of x.

The value of x is given by

Option C: x = 6.2

<h3>What is Pythagoras theorem?</h3>

The Pythagoras theorem:

If ABC is a triangle with AC as the hypotenuse and angle B with 90 degrees then we have:

|AC|^2 = |AB|^2 + |BC|^2

<h3>Using the above theorem to find the value of x for the given figure</h3>

Refer to the figure attached below.

The triangle BAD is right angled triangle (one angle is 90 degrees).

The length of CD is 13 - x units.

Thus, we have:

|AD|^2 + |DB|^2= |AB|^2\\\\Length(AD)= \sqrt{169-81} = \sqrt{88} = 2\sqrt{22}

For triangle ACD, we have:

|AC|^2 +|CD|^2 = |AD|^2\\|AC| = \sqrt{(2\sqrt{22})^2 - (13-x)^2} = \sqrt{-81 -x^2 - 26x}\\

For triangle ACB, we have;

|AB|^2 = |AC|^2 + |CB|^2\\81 = (-81-x^2 +26x) + x^2\\\\x = \dfrac{162}{26} = \dfrac{81}{13} \rm \: units \approx 6.2 \: \rm units

Thus,

The value of x is given by

Option C: x = 6.2

Learn more about Pythagoras theorem here:

brainly.com/question/12790596

8 0
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Does -x plus -x result in -x?
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It results in -2x because 1+1=2 and its the same with negative numbers
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