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3 years ago

Plz help. I don't understand how to do this. Multiply. −4i(2−i)

Mathematics

1 answer:

Elza [17]3 years ago

8 0

Answer:

-8i+4i^2

Step-by-step explanation:

You do distributive property(multiply -4i on the inside on the parantesis) and you get the answer. Eres muy bruto!!!!!!! fue un chiste:)

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I need help please and thank you

ozzi

Answer:

-2480

Step-by-step explanation:

31 * -80 =-2480

Not sure how to explain this more, but I hope this helps!

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3 years ago

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Ratling [72]

Answer: 8.51

Step-by-step explanation:

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3 years ago

What is the equation of the line in the following graph? 1)y=x+2

Levart [38]

The slope-intercept form:

$y=mx+b$

m - slope

b - y-intercept

The formula of a slope:

$m=\dfrac{y_2-y_1}{x_2-x_1}$

We have two points (2, 0) and (-2, -4). Substitute:

$m=\dfrac{-4-0}{-2-2}=\dfrac{-4}{-4}=1$

Therefore we have the equation of a line

$y=1x+b\to y=x+b$

Put the coordinates of the point (2, 0) to the equation:

$0=2+b$ <em>subtract 2 from both sides</em>

$-2=b\to b=-2$

Answer: $\boxed{y=x-2}\to\boxed{3)}$

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3 years ago

How to solve this? Please someone help

seropon [69]

Answer:

Step-by-step explanation:

So the sign means that y has to be less than or equal to x plus 9

if you wanted an answer an example could be

y = 1

x = 10

this works because if implemented into the equation

1 ≤ 10 + 9 which is true

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3 years ago

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What is the value of x

sergey [27]

X = 7 / sin(45)

x = 7 / sqrt(2)/2

x = 7 sqrt(2)

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