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zlopas [31]
3 years ago
15

Factor the quadratic expression completely 15x^-4x-4

Mathematics
1 answer:
In-s [12.5K]3 years ago
4 0

Answer:

(5x+2)(3x-2)

Step-by-step explanation:

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Scott is on his school's academic team. On average, it takes Scott 4 minutes, with a standard deviation of 0.25 minutes, to solv
uysha [10]

Answer:

15.87% is the chance that Scott takes more than 4.25 minutes to solve a problem at an academic bowl.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 4 minutes

Standard Deviation, σ = 0.25 minutes

We standardize the given data.

Formula:

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

P(more than 4.25 minutes to solve a problem)

P( x > 4.25) = P( z > \displaystyle\frac{4.25 - 4}{0.25}) = P(z > 1)

= 1 - P(z \leq 1)

Calculation the value from standard normal z table, we have,  

P(x > 4.25) = 1 - 0.8413 = 0.1587 = 15.87\%

Thus,15.87% is the chance that Scott takes more than 4.25 minutes to solve a problem at an academic bowl.

8 0
3 years ago
What is the domain of the function h(w)=80/w
PtichkaEL [24]
D: (-infinity, 0) U (0, infinity) because you cant have a zero in the bottom of the fraction
4 0
3 years ago
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In this excerpt the servant is a comic figure because he unknowingly invites his master
dedylja [7]

Answer:

Yes he would be

3 0
3 years ago
A function has the function rule y = -7 x - 2. If the input is -4, what is the output? 26 -30 -26 14
GaryK [48]

Answer:

26

Step-by-step explanation:

Since the input is -4, x = -4. The equation then is y = -7(-4) -2

A negative times a negative is a positive, so -7 times -4 is 28.

Now the equation reads y = 28 - 2

Then obviously you just subtract the two and then you get 26.

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A number is between 20 and 30 and is three times the sum of its digits. what is the number?
Phantasy [73]

Answer:

The only multiples of 3 between 20 and 30 are 21, 24, and 27. Only 27 satisfies the condition that it is 3 times the sum of its digits.

Step-by-step explanation:

6 0
3 years ago
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