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Svet_ta [14]
2 years ago
9

Combining like terms in a quadratic expression.... simplify -11x^2 - 3x - 7x^2 + 9 + 8x HELP PLEASE! AND A FEW OTHERS!

Mathematics
1 answer:
valentina_108 [34]2 years ago
8 0
The answer is 4x^2 +5x+9

You will first solve the same variables such as x^2 

11x^2 - 7x^2 = 4x^2

now you will solve the variables with x 

-3x +8x = 5x

so the answer you will get will be 4x^2 +5x = 9
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A ramp is used to load suitcases on an airplane. If the cargo door is 7 feet from the ground and the angle formed by the end of
melisa1 [442]

Answer: 16.56\ ft

Step-by-step explanation:

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In this case you can identify that:

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Now you must substitute these values into sin\alpha=\frac{opposite}{hypotenuse}:

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This is:

sin(25\°)=\frac{7}{x}\\\\xsin(25\°)=7\\\\x=\frac{7}{sin(25\°)}\\\\x=16.56

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Soloha48 [4]

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2 years ago
Pedro is building a playground in the shape of a right triangle he wants to know the area of the playground to help him decide h
shusha [124]

Answer:

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Step-by-step explanation:

Given:

Pedro building a playground in shape of right angled triangle.

To Find:

How much sand he need to buy

And if playground changed to rectangle what will be the dimensions.

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<em>Consider a ΔABC be the play ground vertex of playground,</em>

<em>And AB and BC be the sides making right angle.</em>

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(Refer the attachment)

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3 years ago
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Brut [27]

Answer:

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