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skelet666 [1.2K]
3 years ago
5

Which expression is equal to −2i(4−i)?

Mathematics
2 answers:
Cloud [144]3 years ago
6 0

The answer is A -2-8i


Anni [7]3 years ago
4 0

Answer:

The correct option is A.

Step-by-step explanation:

The given expression is

-2i(4-i)

We need to find the simplified form of the given expression.

Using distributive property we get

-2i(4)-2i(-i)

-8i+2i^2

We know that i^2=-1. Using this fact we get

-8i+2(-1)

-8i-2

Write the above expression as a+ib.

-2-8i

Therefore the correct option is A.

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The figure shows a parallelogram inside a rectangle outline:
leva [86]

Answer:

ディクビッチを吸う?

Step-by-step explanation:

8 0
3 years ago
Help please I don’t get this
Bess [88]

Answer:

y = -2x - 1

Step-by-step explanation:

Formula is y = mx + b

m = slope

slope = change in y/change in x = (-1 - 3) / (0 - -2) = -4/2 = -2

So equation is now y = -2x + b

To find b, substitute any value from the table into the equation. Let's use (-2,3)

y = -2x + b

3 = -2(-2) + b

3 = 4 + b

-1 = b

So equation is y = -2x - 1

3 0
3 years ago
Read 2 more answers
Two cars leave town at the same time going in the same direction. One travels 55 miles per hour and the other travels 48 miles p
Amanda [17]

Answer:

Question 160644: Two cars leave town at the same time going in opposite directions. One travels 55 mph and the other travels 48 mph. In how many hours will they be 206 miles apart? T=2 HOURS THEY WILL BE 206 MILES APART

Ok thank you

4 0
2 years ago
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Given the center of a circle as ( 1, -1 ) and a point on the circle at (4 , 2). Write the equation of the circle. *
Andru [333]

Answer:

(x − 1)² + (y + 1)² = 18

Step-by-step explanation:

Equation of a circle is:

(x − h)² + (y − k)² = r²

where (h, k) is the center and r is the radius.

The center is (1, -1), so plugging that in:

(x − 1)² + (y + 1)² = r²

A point on the circle is (4, 2), so plugging that in:

(4 − 1)² + (2 + 1)² = r²

18 = r²

Therefore, the equation is:

(x − 1)² + (y + 1)² = 18

7 0
3 years ago
Describe how to transform the graph of f(x) = x² to obtain
lord [1]

Answer:

The functions given are:

f(x) = x²

g(x) = f(-4x-3) + 1

First, find f(-4x-3):

f(x) = x²

f(-4x-3) = (-4x-3)²

Find g(x):

g(x) = f(-4x-3) + 1

g(x) = (-4x-3)² + 1

g(x) = (-1)² (4x+3)² + 1

g(x) = (4x+3)² + 1

First take

y = (x)²

Compress the graph along x axis by multiplying x with 4

y = (4x)²

Shift the graph left by 0.75 units, by adding 3 to x term.

y = (4x+3)²

Shift the graph up by 1 unit by adding 1 to the total terms.

y = (4x+3)² +1

4 0
3 years ago
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