All categories

2 years ago

For what real values of does the quadratic 12x^2+kx+27=0 have nonreal roots

Mathematics

1 answer:

bija089 [108]2 years ago

3 0

Answer:

k<±36

Step-by-step explanation:

Δ<0 (no real roots)

b²-4ac<0

k²-4x12x27<0

k²-1296<0

k²<1296

k<±36

You might be interested in

HELP ASAP!!FIRST CORRECT ANSWER WILL GET BRAINLIEST!! which is the correct answer!!

Setler [38]

Answer is the third one or C. Can I have brainliest?! Please?!

8 0

2 years ago

Use function notation to write y=-.2x-1 and build a table to find f(-1), f(0), f(10)

RSB [31]

Your answer would be F(0)=f(-1)

6 0

2 years ago

The area of the surface of an office desk is 12 square feet. The desk is 2 feet wide. How long is it?

Over [174]

Answer:

Length is 6 feet

Step-by-step explanation:

l=A

w=12

2=6

hope you get it right

8 0

3 years ago

What is positive correlation?

igor_vitrenko [27]

In a graph, it is when two variables move in an upwards direction.

4 0

2 years ago

With food prices becoming a great issue in the world; wheat yields are even more important. Some of the highest yielding dry lan

Rzqust [24]

Answer:

Option E) 61.6

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 100 bushels per acre

Standard Deviation, σ = 30 bushels per acre

We assume that the distribution of yield is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

P(X>x) = 0.90

We have to find the value of x such that the probability is 0.90

P(X > x)

$P( X > x) = P( z > \displaystyle\frac{x - 100}{30})=0.90$

$= 1 -P( z \leq \displaystyle\frac{x - 100}{30})=0.90$

$=P( z \leq \displaystyle\frac{x - 100}{30})=0.10$

Calculation the value from standard normal table, we have,

$P(z$

$\displaystyle\frac{x - 100}{30} = -1.282\\x = 61.55 \approx 61.6$

Hence, the yield of 61.6 bushels per acre or more would save the seed.

7 0

2 years ago