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Mumz [18]
4 years ago
14

What is the square root of -1​

Mathematics
2 answers:
Bond [772]4 years ago
6 0
It’s the imaginary number i. Remember that rule. Hope this helps
MariettaO [177]4 years ago
5 0

Answer:

i

Step-by-step explanation:

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scoundrel [369]

Answer:

The answer is A

Step-by-step explanation:

8 0
3 years ago
A country's population in 1991 was 103 million.
Ostrovityanka [42]

Answer:

it is 2020

Step-by-step explanation:

7 0
3 years ago
givings direccións to find different ranger staton.unluckily all the ranger are busy rescuing others campers and can't come to y
DENIUS [597]
To find the resultant vector you need to add the horizontal and vertical components of each individual vector.
Cosine for horizontal, Sine for vertical.
v = \ \textless \ |v|cos \theta, |v| sin \theta\ \textgreater \
Where |v| is magnitude or length of vector.
Lets look at first ranger station. First vector has magnitude 4.5 with angle of 90.
Next has magnitude of 8.1 with angle of 125.
F_1 = \ \textless \  4.5 cos(90)+8.1 cos(125) , 4.5 sin(90) + 8.1  sin(125) \  \textgreater \
F_1 = \ \textless \ -4.646, 11.135\ \textgreater \
Find magnitude:
|F_1| =  \sqrt{((-4.646)^2+(11.135)^2} = 12.065
Do the same with 2nd ranger station:
F_2 = \ \textless \  7.5 cos(20) + 5.3 cos(100), 7.5 sin(20) + 5.3 sin(100)\ \textgreater \
F_2 = \ \textless \ 6.127, 7.784\ \textgreater \
|F_2| = \sqrt{(6.127)^2 + (7.784)^2}  = 9.9

Therefore the 2nd ranger station is closest to starting point.

6 0
4 years ago
Subtract rational expression. <br> Show work please.
yan [13]

Given:

$\frac{x+4}{x-1}-\frac{5}{x^{2}-1}

To find:

The simplified rational expression by subtraction.

Solution:

Let us factor x^2-1. It can be written as x^2-1^2.

x^2-1^2=(x-1)(x+1) using algebraic identity.

$\frac{x+4}{x-1}-\frac{5}{x^{2}-1}=\frac{x+4}{x-1}-\frac{5}{(x+1)(x-1)}

LCM of x-1,(x+1)(x-1)=(x+1)(x-1)

Make the denominators same using LCM.

Multiply and divide the first term by (x + 1) to make the denominator same.

                        $=\frac{(x+4)(x+1)}{(x-1)(x+1)}-\frac{5}{(x-1)(x+1)}

Now, denominators are same, you can subtract the fractions.

                        $=\frac{(x+4)(x+1)-5}{(x-1)(x+1)}

Expand (x+4)(x+1)-5.

                        $=\frac{x^2+4x+x+4-5}{(x-1)(x+1)}

                        $=\frac{x^{2}+5 x-1}{(x-1)(x+1)}

$\frac{x+4}{x-1}-\frac{5}{x^{2}-1}=\frac{x^{2}+5 x-1}{(x-1)(x+1)}

6 0
3 years ago
Paul bought a circular rug for his living room. The rug has a diameter of 11 feet. About how much of Paul's living room will be
fenix001 [56]

Answer:

The rug has covered approximately 95 square feet of the living room.

Step-by-step explanation:

Given:

Diameter of rug = 11 feet

We need to find the area covered in living room by the rug.

Solution:

Diameter of rug = 11 feet

Radius is half of the diameter.

Radius of the rug = \frac{11}{2}=5.5\ ft

Now it has been given that rug is in circular shape.

So we will find the area of the rug using Area of circle formula which is given by π times square of the radius.

Framing in equation form we get;

area of the rug = \pi r^2 = 94.99\ ft^2 \approx 95\ ft^2

Hence The rug has covered approximately 95 square feet of the living room.

3 0
3 years ago
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