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lubasha [3.4K]
4 years ago
5

Use the discriminant to determine how many real number solutions exist for the quadratic equation –4j2 + 3j – 28 = 0. A. 3 B. 2

C. 0 D. 1
Mathematics
1 answer:
Zepler [3.9K]4 years ago
5 0

Answer:

C. 0

Step-by-step explanation:

–4j^2 + 3j – 28 = 0

The discriminant is b^2-4ac  if >0 we have 2 real solutions

                                                   =0  we have 1 real solutions

                                                   <0 we have 2 imaginary solutions

a = -4, b =3  c = -28

b^2 -4ac

(3)^2 - 4(-4)*(-28)

9 - 16(28)

9 -448

This will be negative so we have two imaginary solutions.

Therefore we have 0 real solutions

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Answer:

-0.75

Step-by-step explanation:

4 0
3 years ago
Translate the sentence into an inequality.
Vadim26 [7]

Answer:

9(n + 22) ≤ -15

Step-by-step explanation:

9 times the sum of a number and 22 is at most −15

Let n = number

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We must add parenthesis on the end on 22 and before n

We must do this because it says 9 times the sum of a number and 22 which means that 9 is being multiplied by both n and 22

We would have 9(n + 22)

9(n + 22) is at most -15

At most meaning that -15 is the highest number that 9(n + 22) can equal

Because it says at most 9(n + 22) can equal -15 or anything less than -15

So at most can be replaced with ≤

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4 0
3 years ago
Dalton built a linear model to show the height of a meteor falling to the Earth. The meteor starts at 100 km above the Earth's s
alukav5142 [94]

Answer:

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Step-by-step explanation:

The given parameters from the question are;

The elevation of the meteor above the Earth's surface = 100 km

The rate at which the meteor falls = 20 km per second

The 'x' values represent the time in seconds and the 'y' values represent the meteor's height

Therefore, we have;

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The domain of a function is the set of inputs to the function

Therefore, the domain represent the time it takes the meteor to reach the given 100 km height above the Earth's surface

At the start x = 0 seconds

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8 0
3 years ago
Classify the equation 64x - 16 = 16(4x - 1) as
Maksim231197 [3]

Answer:

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Step-by-step explanation:

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7 0
4 years ago
Read 2 more answers
F(-3,-2), I(-4, 3), A(-2,3), M(1, -1)<br> to<br> I’(-4,-3), A’ (-2, -3), M’(1,1), F(-3,2)
icang [17]
I am not sure what exactly the question is, but all points are a reflection across the x-axis. I hope that helps.
8 0
3 years ago
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