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Arturiano [62]
3 years ago
7

Add the complex numbers: (4 + 8i) + (–2 – i) Question 6 options: A) 6 + 7i B) 2 + 9i C) 2 + 7i D) 6 + 9i

Mathematics
1 answer:
WITCHER [35]3 years ago
8 0

Answer:

C) 2+7i   is the correct answer.

Step-by-step explanation:

simplify by combining the real and imaginary parts of each expression. in this question, the variable i represents an imaginary number.

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3 0
3 years ago
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PLS HELP! URGENT!!!! A circular flower bed is 20 m in diameter and has a circular sidewalk around it that is 3 m wide. Find the
krok68 [10]

Answer: Area of sidewalk is 217m²

Step-by-step explanation:

The formula for determining the area of a circle is expressed as

Area = πr²

Where

r represents the radius of the circle

π is a constant whose value is 3.14

A circular flower bed is 20 meters in diameter.

radius = diameter/2 = 20/2 = 10 meters

Area of the flower bed = 3.14 × 10²

= 314m²

The circular flower bed has a circular sidewalk around it that is 3 meters wide. This means that the total diameter would be

3 + 20 + 3 = 26m

Radius = 26!2 = 13m

Total area = 3.14 × 13² = 530.66m²

Therefore, area of the sidewalk is

530.66 - 314 = 216.66

The area of sidewalk is 217m² to the nearest whole number

6 0
3 years ago
The value of x is ___, and the value of y is ___. <br><br> Please help me out! Thanks! <br> :)
vagabundo [1.1K]
The value of x is 60, as you wrote. The sum of all angles in a triangle is 180°.

The sum of all angles on a straight line is also 180°. So to find y, solve for the third angle of the triangle on the left.

50 + 60 = 110. 180-110 = 70°.

Now we know 2 of the 3 angles along the line (70° and x, 60°)

70 + 60 + y = 180
130 + y = 180
y = 50

Hope this helps. LMK if you have questions.
5 0
3 years ago
Find the mean of the data in the dot plot below.<br> jokers
galben [10]
There is no dot plot ?
6 0
3 years ago
2X +7 &lt; 3X -5——————————————————————————————-
mr Goodwill [35]

Answer:

x>12

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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