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Vera_Pavlovna [14]
3 years ago
10

BRAINLY!! PLEASE HELP ME!! IF YOUR GOOD AT MATH!!

Mathematics
2 answers:
Alla [95]3 years ago
6 0

Answer:

What DeanR answered is true

Step-by-step explanation:

I took the test

riadik2000 [5.3K]3 years ago
5 0

A. Here's a fifth degree polynomial,

f(x) = x⁵ + 4x⁴ - 14x² + 9

It's in standard form, each term a constant coefficient times a whole number power of x (including the constant, which we can think of as the coefficient on x⁰=1), with the terms sorted from highest degree (highest power on x) to lowest.

B.  The closure of addition wrt polynomials just means when we add two polynomials we get another polynomial.

f(x) = x⁵ + 4x⁴ - 14x² + 9

g(x) = -2x⁴  + x

f(x)+g(x) = x⁵ + 2x⁴ - 14x² + x + 9

We added two polynomials, we got another one, that's all closure is.

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14 more than the prouduct of the three and nine
Varvara68 [4.7K]
41
3 times 9 is 27
27+14=41
5 0
3 years ago
Read 2 more answers
Suppose that the time (in hours) required to repair a machine is an exponentially distributed random variable with mean 1/0.41/0
lbvjy [14]

Answer:

a) P(t>3)=0.30

b) P(t>10|t>9)=0.67

Step-by-step explanation:

We have a repair time modeled as an exponentially random variable, with mean 1/0.4=2.5 hours.

The parameter λ of the exponential distribution is the inverse of the mean, so its λ=0.4 h^-1.

The probabity that a repair time exceeds k hours can be written as:

P(t>k)=e^{-\lambda t }=e^{-0.4t}

(a) the probability that a repair time exceeds 3 hours?

P(t>3)=e^{-0.4*3}=e^{-1.2}= 0.30

(b) the conditional probability that a repair takes at least 10 hours, given that it takes more than 9 hours?

The exponential distribution has a memoryless property, in which the probabilities of future events are not dependant of past events.

In this case, the conditional probability that a repair takes at least 10 hours, given that it takes more than 9 hours is equal to the probability that a repair takes at least (10-9)=1 hour.

P(t>10|t>9)=P(t>1)

P(k>1)=e^{-0.4*1}=0.67

6 0
3 years ago
What is the midpoint of a segment with endpoints at(-4,-8) and (8, 10)?
vekshin1

Answer:

The answer is

<h2>( 2 , 1)</h2>

Step-by-step explanation:

The midpoint M of two endpoints of a line segment can be found by using the formula

M = ( \frac{x1 + x2}{2}  , \:  \frac{y1 + y2}{2} )

where

(x1 , y1) and (x2 , y2) are the points

From the question the points are

(-4,-8) and (8, 10)

The midpoint is

M = ( \frac{ - 4 + 8}{2}  , \:  \frac{ - 8 + 10}{2} ) \\  = ( \frac{4}{2} ,  \frac{2}{2} )

We have the final answer as

<h3>( 2 , 1)</h3>

Hope this helps you

4 0
3 years ago
I am a cube that has a length, width, and height of 1 unit
OlgaM077 [116]
If you would like to know the volume of the cube, you can calculate this using the following steps:

volume = length * width * height
volume = 1 * 1 * 1
volume = 1

The volume of a cube is 1.
6 0
4 years ago
Can u plz help me i don't get it
marishachu [46]

Answer:

w=9x+4


Step-by-step explanation:

2(3x-3+w)=12x+2

6x-6+2w=12x+2

subtract 6x for both sides

-6+2w=18x+2

add 6 for both sides

2w=18x+8

Divide by 2 to find w

w=9x+4

3 0
3 years ago
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