3 years ago

Pls help. It’s geometry

Mathematics

1 answer:

Mariulka [41]3 years ago

5 0

The answers are:
H
A
F
A

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If the complex number x = 3 + bi and |x|^2 = 13, which is a possible value of b?

olga55 [171]

If x=3+bi, then

$|x|=\sqrt{3^2+b^2}.$

You know that $|x|^2=13,$ then

$\left(\sqrt{3^2+b^2}\right)^2=13,\\ \\ 9+b^2=13,\\ \\b^2=4,\\ \\b=\pm 2.$

Two possible complex numbers satisfy these conditions:

$x_1=3+2i, \ x_2=3-2i.$

As you can see the possible value of b is 2.

Answer: correct choice is A.

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3 years ago

If Raj randomly chooses a point in the square below, what is the probability that point is not in the circle? Assume that pi = 3

hodyreva [135]

Answer:

49.7%

Step-by-step explanation:

A cdircle is located within a square.

Area of the circle

Area = $\pi$ $r^{2}$ , where r = 4 units.

Area Circle = 50.3 units^2

Area of the square

Area = l*w or l^2 for a square, since l = w

Area = (10 units)^2

Area = 100 units^2

Area in the square but outside the circle

This is the difference [Square minus Circle Areas]

Square minus Circle Areas = 100 - 50.3 or 49.7 units^2

Probability

The probability of picking a point in the square that is not in the circle is the ration of the two areas: [Outside Circle/Square]x100%

(49.7 units^2)/(100 units^2)x100% = 49.7%

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2 years ago

What is the sum of the interior angles of the polygon shown below?

34kurt

Answer:

900

Step-by-step explanation:

Sum of interior angle for a polygon = (n-2)180

7 sides

=(7-2)180

=5*180

=900

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4 years ago

(4.51-5.32)(5.17-6.57) plz tell with solution that means how do we do !!! plz its important

deff fn [24]

Answer:

1.134

Steps:

= (4.51 - 5.32)(5.17-6.57)

= -0.81 × (-1.4)

= 1.134

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3 years ago

What I said the variable for 2a/3 = 3/4? :: A=9/8 , A=6/8 or A= 1/2

JulijaS [17]

The answer is A. 9/8.

4 0

3 years ago