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vredina [299]
3 years ago
6

Solve the following quadratic equation using the quadratic formula.

Mathematics
2 answers:
exis [7]3 years ago
4 0
5x^2-8x+5=0
ax^2+bx+c=0; a=5, b=-8, c=5
Quadratic Formula:
x=[-b+-sqrt(b^2-4ac)]/(2a)
x=[-(-8)+-sqrt( (-8)^2-4(5)(5) )] / [(2)(5) ]
x=[ 8+-sqrt(64-100)] / 10
x=[ 8+-sqrt(-36)] / 10
x=[8+-sqrt( (36)*(-1)) ] /10
x=[8+-sqrt(36)*sqrt(-1)] / 10
x=(8+-6i) / 10
x=(8/2+-6i/2) / (10/2)
x=(4+-3i)/5
x1=(4-3i)/5
x2=(4+3i)/5

Answers:
x=(4-3i)/5  ,  x=(4+3i)/5
Liula [17]3 years ago
4 0

Answer:

x=\frac{4-3i}{5} x= \frac{4+3i}{5}

Step-by-step explanation:

<em>Follow the quadratic formula</em>

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Answer:

  7×10⁻¹ +6×10⁻² +5×10⁻³

Step-by-step explanation:

Place value in any place-value number system increases by a factor of the base for each place to the left of the "decimal" point. It is reduced by a factor of the base for each place to the right of the "decimal" point.

For base-10 numbers, the powers of 10 are -1, -2, -3, ... as you go to the right of the decimal point. Hence the number 0.765 decomposes as ...

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3 0
3 years ago
What is the definition of square root?
Mariana [72]
A square root is a number that produces a specific number when multiplied by itself. Basically it's the same number multiplied by itself.
hope this helps:)
6 0
4 years ago
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FOIL<br> MULTIPLY AND SIMPLIFY <br><br> 4t(2t+7)(t−3)
lesya692 [45]
8 t ^ 2 + 4 t ^ 2 - 8 4 t
3 0
3 years ago
A 90% confidence interval for the average salary of all CEOs in the electronics industry was constructed using the results of a
Stella [2.4K]

Answer:

b) We are 90% confident that the mean salary of all CEOs in the electronics industry falls in the interval $139,048 to $154,144.

Step-by-step explanation:

Confidence interval:

Confidence level of x%

We build from a sample.

Between a and b.

Intepretation: We are x% sure that the population mean is between a and b.

In this question:

90%

45 CEO's

Between ($139,048, $154,144).

So

We are 90% sure that the mean salary of all CEO's falls within this interval.

The correct answer is:

b) We are 90% confident that the mean salary of all CEOs in the electronics industry falls in the interval $139,048 to $154,144.

4 0
3 years ago
Please help me I don’t have much time please look at the picture
Andre45 [30]

Answer:

Just add the painted miles

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The answer B

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3 years ago
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