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beks73 [17]
3 years ago
5

Can you guys help please will mark brainliest answer

Mathematics
2 answers:
Vanyuwa [196]3 years ago
7 0
0.4=4/10
4/10=2/5
The answer is 2/5. To get that write 0.4 as a fraction and divide both numbers by the greatest common factor, which in this case is two.
Hope this helps! If not plz comment and I'll try to explain more☺
kkurt [141]3 years ago
4 0
2/5 is the answer to the question and is that k12 or just an online test?

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Find a quadratic polynomial with integer coefficients which has x = 2/9, ± SQRT23/9 as its real zeros.
melomori [17]

Answer:

The quadratic polynomial with integer coefficients is y = 81\cdot x^{2}-36\cdot x -19.

Step-by-step explanation:

Statement is incorrectly written. Correct form is described below:

<em>Find a quadratic polynomial with integer coefficients which has the following real zeros: </em>x = \frac{2}{9}\pm \frac{\sqrt{23}}{9}<em>. </em>

Let be r_{1} = \frac{2}{9}+\frac{\sqrt{23}}{9} and r_{2} = \frac{2}{9}-\frac{\sqrt{23}}{9} roots of the quadratic function. By Algebra we know that:

y = (x-r_{1})\cdot (x-r_{2}) = x^{2}-(r_{1}+r_{2})\cdot x +r_{1}\cdot r_{2} (1)

Then, the quadratic polynomial is:

y = x^{2}-\frac{4}{9}\cdot x -\frac{19}{81}

y = 81\cdot x^{2}-36\cdot x -19

The quadratic polynomial with integer coefficients is y = 81\cdot x^{2}-36\cdot x -19.

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3 years ago
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Answer: I believe it would be 15.42

Step-by-step explanation:

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SVETLANKA909090 [29]

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When doing that it will be B
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Simplify the expression. 68 – 18 ÷ 3 • 6 Please help
MAXImum [283]
Remember PEMDAS (Parenthesis, Exponents, Multiplication, Divison, Addition and Subtraction)

Also note that Multiplication and Division needs to be done left to right and the same goes for Addition and Subtraction.

So in your problem, the first operation we need to do is division.

68 - (18/3) x 6
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Now we do multiplication
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Finally we do subtraction because that's the only operation we have left to do
68 - 36 = 32

So your answer should be 32.
5 0
4 years ago
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