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3 years ago

Can you square root a negative number? Why or why not?

Mathematics

2 answers:

kicyunya [14]3 years ago

5 0

Yes you can because you just can

alexgriva [62]3 years ago

5 0

No. any number times it self is a positive answer.

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1. Consider the function f(x) = 5x^3 - 31x^2 - 129x + 27

NeX [460]

Answer:

The answer to your question is below

Step-by-step explanation:

Data

1.- f(x) = 5x³ - 31x² - 129x + 27

a) f(9) = 5(9)³ - 31(9)² - 129(9) + 27

f(9) = 5(729) - 31(81) - 1161 + 27

f(9) = 3645 - 2511 - 1161 + 27

f(9) = 0

b.- I will use synthetic division

5 - 31 -129 + 27 9

45 126 -27

5 14 -3 0

Trinomial = 5x² + 14x - 3

Factor 5x² + 15x - 1x - 3

5x(x + 3) - 1(x + 3)

b) (x + 3)(5x - 1)

x₂ + 3 = 0 5x₃ - 1 = 0

x₂ = -3 x₃ = 1/5

c) The roots are x₁ = 9, x₂ = -3 and x₃ = 1/5

2.- f(x) = 3x² + 2x - 8 factor = 3x - 4

x + 2

3x - 4 3x² + 2x - 8

-3x² + 4x

0 +6x - 8

-6x + 8

0 Remainder

As the remainder was "0", 3x - 4 is a factor of 3x² + 2x - 8

3 0

3 years ago

The distributions of X and of Y are described here. If X and Y are independent, determine the joint probability distribution of

max2010maxim [7]

Answer:

The joint probability distribution of X and Y is shown below.

Step-by-step explanation:

The distributions of X and of Y are described as follows:

X : 0 1

P (X) : 0.23 0.77

Y : 1 2 3

P (Y) : 0.40 0.22 0.38

It is provided that X and Y are independent.

That is:

P (X ∩ Y) = P (X) × P (Y)

Compute the joint probability distribution of X and Y as follows:

$P(X=0,Y=1)=P(X=0)\times P(Y=1)=0.23\times 0.40=0.92\\\\P(X=0,Y=2)=P(X=0)\times P(Y=2)=0.23\times 0.22=0.0506\\\\P(X=0,Y=3)=P(X=0)\times P(Y=3)=0.23\times 0.38=0.0874\\\\P(X=1,Y=1)=P(X=1)\times P(Y=1)=0.77\times 0.40=0.308\\\\P(X=1,Y=2)=P(X=1)\times P(Y=2)=0.77\times 0.22=0.1694\\\\P(X=1,Y=3)=P(X=1)\times P(Y=3)=0.77\times 0.38=0.2926$

X 0 1

1 0.9200 0.3080

2 0.0506 0.1694

3 0.0874 0.2926

6 0

3 years ago

can I please get a labeled homework help im confused and last thing please don't make to much long equation because I cant do so

zepelin [54]

Answer:

your answer is x >18

Step-by-step explanation:

Jahsiah's mistake was he added 9 to both sides of the equation. He should have subtracted 9 from both sides of the equation.

Here's the solution

-2x+9<-27

-9 -9

-2x/-2x<-36/-2x

when u divide by negative in inequalities, u change the sign. So ur correct answer is x>18

hope this helped.

6 0

3 years ago

If CP =Rs. 9,000 and SP= Rs. 8,584 then Profit / loss amount is

Gemiola [76]

Answer: Loss = Rs. 416

Step-by-step explanation:

Since CP is more than SP, it is a loss.

Loss = CP - SP

Loss = 9000 - 8584

Loss = 416

8 0

3 years ago

Melanie has a piece of cloth 12 and 1/3 yards long. How many 3/4 yard-long pieces can be cut from the cloth?

Harrizon [31]

This is a division problem. First, get 12 1/3 into fraction form instead of mixed number form to make your life easier;
$12 \frac{1}{3} = \frac{36}{3} + \frac{1}{3} = \frac{37}{3} 
$
Now, divide the two fractions. Since this is fraction division, the reciprocal is flipped and the two fractions multiplied.
$\frac{37}{3} * \frac{4}{3} = \frac{148}{9} = 16 \frac{4}{9} 
$
The answer from the fraction division is 16 and four-ninths, but because you need a whole number as an answer,
the answer is 16 pieces.

8 0

3 years ago

Read 2 more answers