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mezya [45]
3 years ago
9

What is the solution to 4x+3=-9 ?

Mathematics
2 answers:
kirill [66]3 years ago
7 0
x = -3

----------------------------------------------------------------------------------------------------------------

The following steps are taken to isolate x on one side of the equation in order to set it equal to a value on the other side of the equation.

4x + 3 = -9

Cancel out the 3 by subtracting it from both sides of the equation (since it is positive).

4x + 3 - 3 = -9 - 3
4x = -12

Cancel out the 4 (from 4x) by dividing both sides of the equation by it (since it is currently being multiplied).

4x / 4 = -12 / 4
x = -3

Variable x is now isolated on the left side of the equation, leaving the right side equal to x.

Delicious77 [7]3 years ago
6 0
The answer is =-3
You see =-3-9=12
4x=12/4
X=-3
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Graph the equation y = x2 + 8x + 12 on the accompanying set of axes. You must
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Answer:

Step-by-step explanation:

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y-intercept:  Let x = 0.  Then y = 12.  The y-intercept is (0, 12).

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3 years ago
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If the distance from the boat to the lighthouse is 120 meters and the angle of elevation is 40°, which of the following equation
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You can use the fact that lighthouses are usually standing perpendicular to the ground that smaller distance on earth surface(planes or water bodies like sea or ocean or calm river) acts as if they a straight plane.

The length (y) of the lighthouse is given by:

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<h3>What is angle of elevation?</h3>

What you see something higher than your eye level height, you need to see up, you elevate your head to see that thing. The angle from the straight horizontal level of eye to the current elevated level is measured and named as angle of elevation.

Similarly, there is angle of depression when the observer looks down.

<h3>How to calculate the height of the considered lighthouse?</h3>

See the figure attached below to understand the symbols used in calculations.

Let the boat is on point C, and let the light house be AB.

Then we have:

Length of CA = 120 meters

∠ ACB = 40°

To find: length of AB

By using the trigonometric ratio tangent, we get:

tan(\angle ACB) = \dfrac{AB}{AC}\\\\tan(40^\circ) = \dfrac{h}{120}

Since here h is denoted by y, we have h = y, or

The equation to find the height of the lighthouse is

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Thus,

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Learn more about angle of elevation here:

brainly.com/question/12483071

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I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!</span>
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