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Setler [38]
4 years ago
9

Which expression represents the number 5i4+2i3+8i2+−4  rewritten in a+bi  form?

Mathematics
2 answers:
aniked [119]4 years ago
8 0
Remember
i²=-1 so
i³=-i
i⁴=1

so
5i⁴+2i³+8i²-4
5(1)+2(-i)+8(-1)-4
5-2i-8-4
-7-2i is the form
Vinvika [58]4 years ago
6 0

Answer:

Thats not the answer. I need help with this answer too.

These are the answers we're supposed to choose from:

−3+2i

5+0i

5−2i

​−3−4i

−3+0i

Which one is it?

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Which graph represents the function. H(x)=
scZoUnD [109]

Answer:

See attached picture.

Step-by-step explanation:

h(x) has two functions in it. It has y = x and y =-x. Both have a slope of 1 or -1 and are diagonal lines. This means only 2 graphs of the four choices are possible answers.

Notice that y = -x has an interval that is greater than or equal to. This means it is marked with a closed or filled in dot at its start. This means choice B is the correct choice.

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3 years ago
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Dmitriy789 [7]

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y=1/2x

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Look at the graph, all you need is the first point.

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3 years ago
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A student estimated a mass of 250grams, according to the scale the mass is actually 240grams. What is the percent error? (round
NeX [460]

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4.2%

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allsm [11]

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Someone help ASAP solve -5x^2+7x=-9
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5 0
4 years ago
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