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svet-max [94.6K]

3 years ago

8

-7x^2+14x+21=0answer?

1 answer:

scoray [572]3 years ago

6 0

Answer:

7(−x−1)(x−3)

Step-by-step explanation:

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Solve and show how you did: -2x + (12 - 9) = 2 + 9 + 2x

Norma-Jean [14]

Remove parentheses
-2x + 12 - 9 = 2 + 9 + 2x

Simplify -2x + 12 -9 to -2x + 3
-2x + 3 = 2 + 9 + 2x

Simplify 2 + 9 + 2x to 2x + 11
-2x + 3 = 2x + 11

Add 2x to both sides
3 = 2x + 11 + 2x

Simplify 2x + 11 +2x to 4x + 11
3 = 4x + 11

Subtract 11 from both sides
3 - 11 = 4x

Simplify 3 - 11 to - 8
-8 = 4x

Divide both sides by 4
-8/4 = x

Simplify 8/4 to 2
-2 = x

Switch sides
x = -2

5 0

2 years ago

Find an equation for the nth term of the arithmetic sequence.

Murrr4er [49]

Answer:

I think it is C

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers

Who painted the larger fraction of their ceiling?

olga_2 [115]

Well the person who painted 1/2 did.

7 0

3 years ago

17+3.6<br>btw it's an decimal

inn [45]

The answer is 20.6 because 17+3=20 and then you add the decimal so 20+0.6= 20.6

5 0

3 years ago

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a photographer shines a camera light at a particular painting forming an angle of 50 degrees with a camera platform at the light

umka2103 [35]

Answer:

The painting is 42.13 feet above the platform

Step-by-step explanation:

Refer the attached figure .

A particular painting forming an angle of 50 degrees with a camera platform .

∠ABC = 50°

We are also given that the light is 55 feet from the wall where the painting hangs

i.e. AB = 55 feet.

Now we are required to find how high above the platform is the painting. i.e. AC

So, we will use trigonometric ratio :

$sin\theta = \frac{Perpendicular}{Hypotenuse}$

$sin50^{circ} = \frac{AC}{AB}$

$sin50^{circ} = \frac{AC}{55}$

$0.766*55 = AC$

$42.13= AC$

Thus the painting is 42.13 feet above the platform

8 0

3 years ago