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Maurinko [17]
3 years ago
13

X^2+14x+-55=0 help me ☺️

Mathematics
1 answer:
vodomira [7]3 years ago
3 0
\left[X _{1}\right] = \left[ \left( -1\,i \right) \,\sqrt{\left( -55+14\,x\right) }\right][X​1​​]=[(−1i)√​(−55+14x)​​​] I hope helping with u
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Find the mid point of the line segment.
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2 years ago
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Match each complex number with its equivalent expression i^157 i^315 i^102 i^76
ryzh [129]

Answers:

i^{157} = i\\\\i^{315} = -i\\\\i^{102} = -1\\\\i^{76} = 1\\\\

=====================================================

Explanation:

By definition, i = \sqrt{-1}

Squaring both sides gets us i^2 = -1

Then multiply both sides by i to get i^3 = -i

Repeat the last step and you should get i^4 = -i^2 = -(-1) = 1

---------------

Notice we have this pattern going on:

i^0 = 1\\\\i^1 = i\\\\i^2 = -1\\\\i^3 = -i\\\\i^4 = 1\\\\

Once we reach i^4, we start the process over again.

It repeats every 4 terms.

This means we'll divide the exponent over 4 and look at the remainder. We ignore the quotient completely.

157/4 = 39 remainder 1

That remainder 1 is the exponent of the simplified term

i^{157} = i^1 = i

---------------

Similarly,

315/4 = 78 remainder 3

So i^{315} = i^3 = -i

---------------

102/4 = 25 remainder 2

i^{102} = i^2 = -1

----------------

76/4 = 19 remainder 0

i^{76} = i^0 = 1

8 0
2 years ago
You owe four people $7 each. Yesterday you paid off your debt. Write two equations to show how much money you paid yesterday
Mademuasel [1]
7+7+7+7=28
7x4= 28
If you are learning multiplication you can use those
4 0
3 years ago
What is the solution of the system?
Serjik [45]

Answer:

(-13,-4)

Step-by-step explanation:

4x-8y=-20

9x+113=y

Substitute in y for 9x+113

4x-8y=-20

Substitute

4x-8(9x+113)=-20

Simplify

4x-72x-904=-20

Simplify

-68x-904=-20

Additive Prop. of Equality

-68x-904+904=-20+904

Simplify

-68x=884

Isolate the variable(x)

<u>-68x</u>=<u>884</u>

-68x -68x

Simplify

x=-13

Solve for y

9x+113=y

9(-13)+113=y

-117+113=y

-4=y

Check

4x-8y=-20

4(-13)-8(-4)=-20

-52+32=-20

-20=-20

9x+113=y

9(-13)+113=-4

-117+113=-4

-4=-4

8 0
3 years ago
William earns $2,400.00 each month. His current monthly expenses are $1,910.00. This month, he plans to pay a little extra to hi
dlinn [17]

Answer:

b

Step-by-step explanation:

2400-1910=490

8 0
3 years ago
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