Answer:63
Step-by-step explanation:im sure
It has been debated for years as to whether or not Descartes's Rule of Signs is helpful when working with Polynomial Functions. In your own words:
a) explain the purpose in using Descartes's Rule of Signs
b) state whether or not you think it is helpful or simply a waste of time, then explain your answer.
-38 +(30) =
28 + 45 =
Answer:
I think the first answer is 8 and I dont know the second answer
Answer:
-38 + (-30) = -68
-28 + 45 = 17
Sarah babysat for 3 hours and earned $24. At this rate, how much money will Sarah earn if she babysits for 8 hours?
о
An optical inspection system is used to distinguish among different part types. The probability of a correct classification of any part is 0.94. Suppose that three parts are inspected and that the classifications are independent. Let the random variable X denote the number of parts that are correctly classified. Determine the mean and variance of X.
Answer:
The mean and variance of X are 2.82 and 0.1692 respectively
Step-by-step explanation:
The binomial distribution is a discrete probability distribution that tells the percentage in which a result is likely to be obtained between two possibilities when performing n number of tests. In other words, a binomial distribution is a discrete probability distribution that describes the number of successes when conducting n independent experiments on a random variable.
In a binomial distribution, the mean indicates the mean value of a random phenomenon. It is calculated by:
μ=n*p
Where:
n is the number of trials p is the probability of successThis case is a binomial distribution, where n = 3 and p = 0.94. Then:
μ=3*0.94
μ=2.82
The mean of X is 2.82.
Variance is a measure of dispersion that represents the variability of a data series with respect to its mean. It is calculated by:
Var[X]= n*p*q
Where:
n is the number of trials p is the probability of success q is the probability of failureRemembering that the random variable X expresses the number of successes obtained when performing "n" independent Bernouilli tests or tests with probability "p" of success and "(1-p)" of failure, then q = 1-p.
So:
Var[X]= n*p*(1-p)
In this case:
Var[X]=3*0.94*(1-0.94)
Var[X]=3*0.94*0.06
Var[X]=0.1692
The variance of X is 0.1692
Which best explains the forces acting on the objects?
Answer:
this answer is not avaliable because i didnt have any options.
Step-by-step explanation:
Answer:
The answer is B: Objects W and Y have balanced forces, and objects X and Z have unbalanced forces.
Step-by-step explanation:
What is 34.567 rounded to the tenths place
Answer:
34.57 I'm pretty sure yayyy
Answer:
34.567 rounded to tenths is 34.6
Step-by-step explanation:
because if you look at the number to the right it five or more so you raise the score and the five turns to a 6 so 34.567 = 34.6
Help with number 1 please
Answer:
you could stay there 6 nights
Step-by-step explanation:
to solve this you would do 825$ ÷ by the amout which is 134$ and then you get 6.15671641791 then you would round it which give you 6 nights.
Order the values from least (top) to greatest (bottom). -|21|, -16, |-10|, 22, |-32|
Answer:
22
-10
-16
-21
-32
Explanation:
On a number line, negative numbers are on the left and positive numbers are on the right. So, typically, the positive numbers would be less than the negative numbers.
Hope this Helps!
Use the graph of the line to answer the questions.
What is an equation of the line in point-slope form?
y-1=3(x+0)
y-0=3(x-1)
y+1=(1/3)(x+2)
y+2=(1/3)(x+1)
How can the point-slope form be written in function notation?
f(x)=(1/3)x-(5/3)
f(x)=(1/3)x-(1/3)
f(x)=3x-3
f(x)=3x+1
Answer: Use the graph of the line to answer the questions.
What is an equation of the line in point-slope form?
✔ y + 1 = (1/3)(x + 2)
How can the point-slope form be written in function notation?
✔ f(x) = (1/3)x – (1
how to get domain and range from a table of values.
Answer: The domain is all of the possible values for the input (x) axis. The range is the possible values for the output (y).
Step-by-step explanation: You will have to subtract the least value from the greatest value for both your x and y.
A polynomial, P(x) = x2 + 2x + k has (x – 2) as a factor. What is
the value of k?
Answer:
x-2 =0
x=2
now
putting the x value in p
we have,
p(2) = x2 + 2x +k
= 2×2 +2×2+k
= 4+4+k
= 8+k
so,
Either
8+k =0
k= - 8
Solve for x? -10x-(-4)=14
Q: -10x-(-4)=14
A: x=-1
Process:
-Subtracting a negative is just like adding 10x+4=14
-Subtract 4 from both sides -10x=10
Divide -10 from both sides x=-1
Given that z is a standard normal random variable, what is the value of z if the area to the left of z is 0.9382:
a. 1.8
b. 1.54
c. 2.1
d. 1.77
Answer: 1.54
Step-by-step explanation:
Given that :
Z = normal random variable
Area to the left of z = 0.9382
For a random normal distribution ;
P(Z < x) = 0.9382
Using the Z table (standard normal distribution table) ;
Locating the probability value (0.9382) on the table and picking the intersecting z value both horizontally and vertically :
Horizontal value = 1.5
Vertical value = 0.04
Horizontal + vertical = (1.5 + 0.04) = 1.54
What is the slope of the line that goes through the points (1,-2) and (3,6)?
Question 1 options:
-4
4
1
2
Answer: 4
Step-by-step explanation: Brainliest plz!!
You purchase 3 items for $4.23. About how much did you spend?
Answer:
4.23 rounded to the nearest whole number is 4.
Answer:
4.23 2.115 per item
Step-by-step explanation:
Eve saw 715 cars in her front yard. 2/5 of the cats were black. How many black cats were in Eves front yard.
PLZZZ HELPS ME I WILL GIVE BRAINLIEST!
Which relations are functions?
Select Function or Not a function for each graph.
Answer: The first 3 are functions. The last one is not a function
Step-by-step explanation: What you can do is the line test. If you draw a line through it, the line shouldn't touch the arrow twice. Like the last one, it touches the line twice, so it is not a function
This is a net of a square pyramid.
What is the surface area, in square centimeters, of the square pyramid?
Answer:
120cm
Step-by-step explanation:
The surface area of the square pyramid is 127.4 square centimeters
What is Three dimensional shape?A three dimensional shape can be defined as a solid figure or an object or shape that has three dimensions—length, width, and height.
The given figure is a square pyramid
The formula to find surface area = a²+2a√a²/4+h²
a is the base edge length and h is the height
a is 6 cm and h is 7 cm
Surface area = 6²+2(6)√6²/4+7²
=36+12√36/4+49
=127.4 square centimeters
Hence, the surface area of the square pyramid is 127.4 square centimeters
To learn more on Three dimensional figure click:
https://brainly.com/question/2400003
#SPJ2
what is i^30
Math is killing me and i have no real help someone save me!!! I cant even start to understands this concept so if you could explain and give the answer that'd be great bunch of points if you do!!!
Answer:-1
Step-by-step explanation: It’s seen as a pattern going back and forth between a few answers.
Answer:
It's -1.
Step-by-step explanation:
i has no value but if you multiply it by itself 30 times you get -1. Imaginary numbers are great, I know.
NEED HELP WITH MATH! Will Give Brainliest! Image is below.
The answer is number 4. x=1 x=2 x=-2
The percent of fat calories that a person in America consumes each day is normally distributed with a mean of about 36 and a standard deviation of about 10. Suppose that 16 individuals are randomly chosen. For the group of 16, find the probability that the average percent of fat calories consumed is more than thirty-five (Round to 3 decimal places)
Answer:
Step-by-step explanation:
Mean μ = 36
standard deviation σ = 10
n = 16
standard deviation of the group σ₁ = σ / √n
σ₁ = 10/ √16
= 10 / 4 = 2.5
σ₁ = 2.5
P ( x > 35 ) = 1 - P ( x < 35 )
P ( x < 35 ) = P( z < (35 - 36) / 2.5 ) = P( z < (35 - 36) / 2.5 )
= P( z < 0.4 )
= .3446
P ( x > 35 ) = 1 - .3446
= .6554 .
Translate the phrase into an algebraic expression.
y more than 4
Answer:
y+4
Step-by-step explanation:
What is (f + g)(x)?
f(x) = -2x
g(x) = 5x + 6
What is this written as a polynomial or a rational function
Answer:
(f + g)(x) = 3x + 6
Step-by-step explanation:
Brainliest?
Imaginary Numbers (File attached)
4- Employees at a certain company currently have to pay 7% of their health care costs,
while the company pays the rest. Next year, however, employees will have to pay 14%
of their health care costs. Express this change as:
absolute change (in percentage points) =
relative change =
Answer:
The absolute change would be 3 percentage points.
The relative change would be 100%
Step-by-step explanation:
find the value of x !!!!
I have a small dog and a big dog. My big dog weighs 50 pounds more than twice the weight of my small dog. The sum of their weght is 68 pounds. How much do they weigh?
Answer:
Small dog =18
Big dog=50
Step-by-step explanation:
68-50=18
Answer:
75+68
Step-by-step explanation:
if [tex]x\leq cy+D[/tex], solve for y in terms of x, c and d? (c>0)
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[tex]x \leqslant cy + D[/tex]
Subtract sides D
[tex]x - D \leqslant cy + D - D[/tex]
[tex]x - D \leqslant cy[/tex]
Divide sides by c
[tex] \frac{x - D }{c} \leqslant \frac{cy}{c} \\ [/tex]
[tex] \frac{x -D}{c} \leqslant y \\ [/tex]
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A random sample of 114 observations produced a sample mean of 30. Find the critical and observed values of z for the following test of hypothesis using The population standard deviation is known to be 5 and the population distribution is normal.
Complete Question
A random sample of 114 observations produced a sample mean of 30. Find the critical and observed values of z for the following test of hypothesis using α=0.01. The population standard deviation is known to be 5 and the population distribution is normal.
[tex]H_o: \mu =28[/tex] versus H1: μ>28.
Round your answers to two decimal places.
[tex]z_{critical} =[/tex]
Answer:
[tex]z_{critical} = 2.33[/tex]
The observed value is [tex] z = 4.27 [/tex]
Step-by-step explanation:
From the question we are told that
The sample size is n = 114
The sample mean is [tex]\= x = 30[/tex]
The significance level is [tex]\alpha = 0.01[/tex]
The population standard deviation is [tex]\sigma = 5[/tex]
The null hypothesis is [tex]H_o: \mu =28[/tex]
The alternative hypothesis is H1: μ>28.
Generally the test statistics (observed value ) is mathematically represented as
[tex] z = \frac{ \= x - \mu }{ \frac{\sigma }{\sqrt{n} } } [/tex]
=> [tex] z = \frac{ 30- 28 }{ \frac{5}{\sqrt{114} } } [/tex]
=> [tex] z = 4.27 [/tex]
From the normal distribution table the critical value of [tex]\alpha = 0.01[/tex] is
[tex]z_{critical} = 2.33[/tex]
Suppose the difference between actual and predicted weekly sales of a company follows a uniform distribution between -$4000 and $4000. Determine the probability that the actual sale is within $1500 of the predicted sale (which means P(-1500
Answer: 0.375
Step-by-step explanation:
Given: The difference between actual and predicted weekly sales of a company follows a uniform distribution between -$4000 and $4000.
Probability density function: [tex]f(x)=\dfrac{1}{b-a}=\dfrac{1}{4000-(-4000)}=\dfrac{1}{8000}[/tex]
The probability that the actual sale is within $1500 of the predicted sale = [tex]\int^{1500}_{-1500}f(x)dx=\int^{1500}_{-1500}\dfrac{1}{8000}dx=\dfrac{1}{8000}[x]^{1500}_{-1500}\\\\= \dfrac{1}{8000}(1500-(-1500))\\\\= \dfrac{1}{8000}(3000)=0.375[/tex]
Hence, Required probability =0.375
