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Kitty [74]
2 years ago
14

What’s the definition of the number i?

Mathematics
1 answer:
Valentin [98]2 years ago
3 0

Answer:

<h2>B. i = √(−1)</h2>

Step-by-step explanation:

When (i) is multiplied to itself it = -1

The number (i)is used for imaginary numbers.

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Stacey and Jeremy sent out 380 invitations They have received 127 responses. What does q represent in the equation 380- q = 127
Maslowich
Q represents how many they did NOT recieve

380-127= 253

Now let's check

380-253= 127

CHECK

So q represents 253(the number of invitations they did NOT recieve)


Hope this helps!
7 0
3 years ago
I am studying for a Calculus test and have the answers for the study guide but I'm having trouble with problems 2, 3, 4 (finding
Mariulka [41]
#2) Use quotient rule
\frac{f'g - fg'}{g^2}
Remember for solving log equations:
e^{ln x} = x

#3) Derivative of tan = sec^2 = 1/cos^2
Domain of tan is [-pi/2, pi/2], only consider x values in that domain.

#4 Use Quotient rule

#9  Use double angle identity for tan
tan(2x) = \frac{2tan x}{1-tan^2 x}
This way you can rewrite tan(pi/2) in terms of tan(pi/4).
Next use L'hopitals rule, which says the limit of indeterminate form(0/0) equals limit of quotient of derivatives of top/bottom of fraction.

Take derivative of both top part and bottom part separately, then reevaluate the limit. <span />
4 0
3 years ago
Find the product of the roots of the equation<br> xl-5x - 36 = 0
Marat540 [252]

Answer:

Step-by-step explanation:

Hello, I assume that you mean

x^2-5x-36

The product is -36.

x_1 \text{ and } x_2 \text{ are the two roots, we can write}\\\\(x-x_1)(x-x_2)=x^2-(x_1+x_2)x+x_1\cdot x_2

So in this example, it means that the sum is 5 and the product is -36.

Thank you

5 0
3 years ago
Johnny can type 141 words in 2 minutes.at this rate,how many words can be typed in 10 minutes
Sergeu [11.5K]

Answer:

705

Step-by-step explanation:

141 words in 2 minutes means 70.5 words in a minute

70.5 × 10 = 705 words in 10 minutes

7 0
3 years ago
Read 2 more answers
Use the value of the linear correlation coefficient r to find the coefficient of determination and the percentage ofthe total va
Vikentia [17]

Answer:

Step-by-step explanation:

The coefficient of determination = r^{2}  = 0.885^{2} = 0.7832

It means about 78% variation in waist size of males can be explained by their weight and about 23% can not be explained.

4 0
3 years ago
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