4 years ago

Simplify (7x2 - 2x + 9) + (3x2 + 15x – 4).

Mathematics

2 answers:

VikaD [51]4 years ago

5 0

Hey! Your answer for this is

7x^2 + 3x^2 = 10x^2

-2x + 15x = 13x

9 - 4 = 5

Hence, 10x^2 + 13x + 5.

Hope this helps!

goldfiish [28.3K]4 years ago

3 0

Answer:

A=10

Step-by-step explanation:

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harkovskaia [24]

Answer: $h=5.66ft$

Step-by-step explanation:

Observe the picture attached.

Find the value of "x" and "y" using the Pythagoren Theorem:

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If you solve for "a":

$a= \sqrt{b^2+c^2}$

Where "a" is the hypotenuse and "b" and "c" are the legs.

In this case, for "x" you know that:

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Then, the value of "x" is:

$x=\sqrt{(8ft)^2+(2ft)^2}\\\\x=8.24ft$

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Subsituting values and solving for h, you get:

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4 years ago

You gave your little sister a good push on a swing and it made an arc of 12 ft. On the third swing it made an arc of 8.67 ft. Ho

jonny [76]

10.2 ft Ans.

We solve this using geometric series.

A1 = 12 ft
A2 = ?
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$

$\frac{12}{A2} = \frac{A2}{8.67}$

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Step-by-step explanation:

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What is 39.5/4 if you tell me you get 45 points

Anastaziya [24]

Answer:

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Step-by-step explanation:

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