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3 years ago

What is 10.261 divided by 3.1

Mathematics

1 answer:

Paha777 [63]3 years ago

8 0

The answer is 3.1 because 3.1*3.1 is 10.261

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Kim, Laura and Molly share £385 The ratio of the amount of money Kim gets to the amount of money Mollly gets is 2:5 Kim gets £10

Thepotemich [5.8K]

Molly: 105 x 05/02 = 42
Kim: 105-42 = 63
 Laura: 385-105 = 280
280 x 100/385 = 72%
Donc Laura obtient 72%

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3 years ago

Which value from the set (1/3, 3, 5, 15) will make the equation n divided by 3/5 = 5 true?

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The answer is 3!!

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3 years ago

Y = (x + 2)^2-3 in standard form?

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3 years ago

Find a polynomial function of degree 3 with 2, i, -i as zeros.

sergiy2304 [10]

Answer:

$p(x)= x^3-2x^2+x-2$

Step-by-step explanation:

Here we are given that a polynomial has zeros as 2 , i and -i . We need to find out the cubic polynomial . In general we know that if $\alpha , \ \beta \ \& \ \gamma$ are the zeros of the cubic polynomial , then ,

$\sf \longrightarrow p(x)= (x -\alpha )(x-\beta)(x-\gamma)$

Here in place of the Greek letters , substitute 2,i and -i , we get ,

$\sf\longrightarrow p(x)= (x -2 )(x-i)(x+i)$

Now multiply (x-i) and (x+i ) using the identity (a+b)(a-b)=a² - b² , we have ,

$\sf \longrightarrow p(x)= (x-2)\{ x^2 - (i)^2\}$

Simplify using i = √-1 ,

$\sf \longrightarrow p(x)= (x-2)( x^2 + 1 )$

Multiply by distribution ,

$\sf \longrightarrow p(x)= x(x^2+1) -2(x^2+1)$

Simplify by opening the brackets ,

$\sf\longrightarrow p(x)= x^3+x-2x^2-2$

Rearrange ,

$\sf\longrightarrow \underline{\boxed{\blue{\sf p(x)= x^3-2x^2+x-2}}}$

4 0

2 years ago