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Pani-rosa [81]
3 years ago
9

Which are steps that could be used to solve 0 = 9(x2 + 6x) – 18 by completing the square? Check all that apply.

Mathematics
2 answers:
jeyben [28]3 years ago
8 0
18 + 81 = 9(x²<span> + 6x + 9)
</span><span>11 = (x + 3)</span>²

When we are completing the square, we are going to move the value of c across the equals.  We will do that by adding, and end up with

18=9(x²+6x)

We take the value of b (the coefficient of x), divide it by 2 and square it:
(6/2)²=3²=9

This is the value that completes the square.  However, since the entire square is multiplied by 9, this value must be multiplied by 9 before we can add it across the equals:
18+9(9) = 9(x²+6x+9)
18+81=9(x²+6x+9)
99=9(x²+6x+9)

Dividing both sides by 9, we have:
11=x²+6x+9

11=(x+3)²
tankabanditka [31]3 years ago
7 0
1st and 4th would be the correct  answer to the quaestion
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I don’t understand this
egoroff_w [7]

Answer: OPTION A

Step-by-step explanation:

The distance between any number is always positive so we should apply the absolute value.

The distance between numbers=number 1-number2 (or vise versa, and that is why we need absolute value)

In your question, the two numbers are 3/4 and 2. Applying to the expression above, the distance between two numbers should be |3/4-2| or |2-3/4|.

The only option in your case is |3/4-2| and this is it.

Hope this helps!! :)

Please let me know if you have any question

5 0
3 years ago
I Leslie was helping her dad package 447 cupcakes in boxes for a company picnic. Each box holds 8 cupcakes. How many boxes do Le
Yuki888 [10]

Answer:

56

Step-by-step explanation:

447/8

56

well actually

55.875

I just rounded it up

5 0
3 years ago
What is 0.612 (12 repeating) simplified to a fraction?
Nata [24]

Answer:

the idea behind the recurring decimal as a fraction, is to first off, multiply or divide by some power of 10, in order that we leave the recurring decimal to the right of the decimal point.

then we multiply by a power of 10, in order to move the repeating digits to the left of the decimal point, anyhow, let's proceed.

notice, we first divided by 10, to move the decimal point over to the right by 1 slot, then we multiplied by 100, to move it two digits over the decimal point, namely the repeating "12", thus we use 100. i think

Step-by-step explanation:

8 0
3 years ago
Can someone please tell me how to do equal values?
natulia [17]

Answer:

I think you just plug in the first equation to the or the second to the first, it’s actually does not matter. After that you just solve it. For example: we have two equations.

y=11-2x

y=x+2

We just plug in the first equation to the second one.

11-2x=x+2

-3x=9

x=-3. So this is the answer. Hope this helps.

Step-by-step explanation:


3 0
3 years ago
Please answer the both of them I will reward brainlest
frozen [14]

Part A) you sub .3 B is answer

Part b) 23.4-.3=23.1 and 23.1-.3 is 22.8 B is answer

Your welcome!

6 0
3 years ago
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