3 years ago

What is a complex number ?

1 answer:

5 0

Answer:A complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x² = −1. Because no real number satisfies this equation, i is called an imaginary number.

Step-by-step explanation:

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The area of section 1 is _____ square feet, the area of section 2 is _____ square feet, and the area of section 3 is _____ squar

nignag [31]

Answer:32 ft

Step-by-step explanation:

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3 years ago

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What is the slope of the line through (-7,-8)(−7,−8)left parenthesis, minus, 7, comma, minus, 8, right parenthesis and (0,4)(0,4

ANEK [815]

Answer:

12/7

Step-by-step explanation:

When given two points, we can find the slope by using

m = (y2-y1)/(x2-x1)

= (4 - -8)/ (0 - -7)

= (4+8) / (0+7)

= 12/7

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2 years ago

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Naddika [18.5K]

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3 years ago

The percent of concentration of a certain drug in the bloodstream x hours after the drug is administered is given by K(x) 5x/x^2

Olegator [25]

Given :

The percent of concentration of a certain drug in the bloodstream x hours after the drug is administered is given by $K(x) = \dfrac{5x}{x^2+9}$ .

To Find :

Find the time at which the concentration is a maximum. b. Find the maximum concentration.

Solution :

For maximum value of x, K'(x) = 0.

$K'(x) = \dfrac{5(x^2+9)- 5x(2x)}{(x^2+9)^2}=0\\\\5x^2+45-10x^2=0\\\\5x^2 = 45\\\\x = \pm 3$

Since, time cannot be negative, so ignoring x = -3 .

Putting value of x = 3, we get, K(3) = 15/( 9 + 9) = 5/6

Therefore, maximum value drug in bloodstream is 5/6 at time x = 3 units.

Hence, this is the required solution.

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2 years ago

Write the equation of the line that passes through (0,5) and is perpendicular to the line x = 3.

Alona [7]

Answer:

(0,5)x3=(15,5)

Step-by-step explanation:

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2 years ago