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MaRussiya [10]
3 years ago
8

A line with a slope of - 8 passes through the points ( - 1, z) and ( - 2, 7). What is the value of z?

Mathematics
1 answer:
ikadub [295]3 years ago
4 0

Answer:

z = -1

Step-by-step explanation:

7 - z / -2 - (-1)

7 - z / -2+1

7 - z / -1

-7 +z = -8

z = -1

to check the work

(-1,-1) (-2,7)

7 + 1 / -2 + 1

8 / -1

= -8

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30 POINTS HELP PLEASE
Reptile [31]

Answer:

\large\boxed{a=-3,\ b=-7\ and\ c=3}

Step-by-step explanation:

ax^2+bx+c=0

We have:

-3a^2=7a-3          <em> subtract 7a from both sides</em>

-3a^2-7a=7a-7a-3

-3a^2-7a=-3           <em>add 3 to both sides</em>

-3a^2-7a+3=-3+3\\\\-3a^2-7a+3=0\to a=-3,\ b=-7, c=3

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3 years ago
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Answer:

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5 0
2 years ago
Which of the following is the conjugate of a complex number with 2 as the real part and 7i as the imaginary part? (5 points)
lisov135 [29]
The complex conjugate of <span>7i</span><span> is </span><span>−7i </span>The complex conjugate of a number 

z is a number with opposite imaginary part.

So if <span>z=a+bi</span> then conjugate is: <span><span>¯z</span>=a−bi</span> for any <span>a,b∈R</span>

We can note, that if we represent all complex numbers in coordinate system, then for any number: the number z and its conjugate <span>¯z</span> are symetrical according to "real part" axis.

6 0
3 years ago
Can anyone hknow number 2?
fomenos

Answer:

n = y/(r+s)

Step-by-step explanation:

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Multiply each side by y

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Factor out n

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Divide each side by (r+s)

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n = y/(r+s)

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3 years ago
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