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Julli [10]
3 years ago
13

Complete the square for 3x^2-6x=21. leave your answer in the form (____)^2=(____)

Mathematics
2 answers:
jarptica [38.1K]3 years ago
6 0
X^2-2x=7
x^2-2x+1=7+1
(x-1) ^2=8
Mrac [35]3 years ago
3 0

Answer: (x - 1)² = 8

<u>Step-by-step explanation:</u>

3x² - 6x = 21

<u>÷3 </u>  <u> ÷3 </u>  <u> ÷3 </u>

 x² - 2x = 7

x² - 2x + ___ = 7 + ___

     ↓         ↑              ↑

   \frac{-2}{2} = (-1)^{2}

x² - 2x + <u> 1 </u> = 7 + <u> 1 </u>

    (x - 1)²     =  8

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What is the circumference of the circle below?​
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Answer:

90π or 283.74

Step-by-step explanation:

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Find the Measure of angle O<br> (see image)<br> Only real answers, please
allochka39001 [22]

Answer:

From the given figure we can see that :---

MN||PO, MN=PO and MP=NO

Therefore, angle M=angle N (adjacent sides of the trapezoid)

(8x - 16)  =  (6x + 20) \\ 2x = 36 \\  \boxed{x = 18}

angle M=angle N= (6×18)+20=108+20 =128°

angle O =(180°-128°)=52°

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3 years ago
Use the hundredths grid to answer the question.
professor190 [17]

The question is an illustration of multiplication model.

The multiplication model is: \mathbf{0.90 \times 0.10 =0.09}

From the figure, the shaded portions are:

\mathbf{Green = \frac{90}{100}}

\mathbf{Orange = \frac{10}{100}}

So, the multiplication model represents:

\mathbf{Model =Green \times Orange}

This gives

\mathbf{Model =\frac{90}{100} \times \frac{10}{100}}

Express as decimal

\mathbf{Model =0.90 \times 0.10}

\mathbf{Model =0.09}

Hence, the multiplication model is:

\mathbf{0.90 \times 0.10 =0.09}

Read more about multiplication models at:

brainly.com/question/1928793

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I need an answer...............................
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