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Alex17521 [72]
4 years ago
5

8i-(12-4i)+7√-9 show work please

Mathematics
1 answer:
Tanya [424]4 years ago
5 0

Answer:

33i - 12

Step-by-step explanation:

8i - (12 - 4i) + 7 \sqrt{ - 9}   \\  = 8i - 12  + 4i + 7 \sqrt{9  \times ( - 1)}  \\ = 12i - 12 + 7 \times 3 \sqrt{ - 1}  \\ = 12i - 12 + 21i  \:  \: ( \because  \sqrt{ - 1} = i)\\  = 12i + 21i - 12 \\   \therefore \red{ \bold{8i - (12 - 4i) + 7 \sqrt{ - 9} }=  \purple{ \bold{33i - 12}}}

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Write the slope-intercept form of the equation of the line described.
Genrish500 [490]

Answer:

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Step-by-step explanation:

Remember: Perpendicular lines slope are negative reciprocals of each other.

y = -1/7x + 4.

Now you know the slope of the given line is -1/7.

So the slope of the perp line is 7/1 = 7 .  

Use the given point (-1, -4) and the perp slope = 7 into y =mx + b and solve for "b".

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3 years ago
Two vertices are 3x+10 and x+60 find x
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The value of x such that the vertices 3x + 10 and x + 60 are equal is 25

<h3>What are vertices?</h3>

Vertices are the endpoints or corners of a shape (such as triangle, square, rectangle and related shapes)

<h3>How to determine the value of x?</h3>

The two vertices are given as:

3x + 10 and x + 60

The condition on the two vertices are not given.

So, we assume that the vertices are equal (as in the base angles of an isosceles triangle)

So, we have the following equation

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Read more about vertices at:

brainly.com/question/17972372

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What is the graph of y=4^x+3
Fudgin [204]

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Edit: Here is a screenshot of the graph

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