Answer:
A) x=-1
B) x=11/4
Step-by-step explanation:
Determine if the following relations are functions. If they are functions, also state the domain and range.
Answer:
desculpa mas eu não sei a resposta mais eu vou ver se posso te ajudar taaa
The Nike store sold 99 Kobe Bryant shirts for $24 each. All money will go to a charity in his name.How much money will be going to a charity?
Answer:
$2376
Step-by-step explanation:
We love you Kobe <3 We love you Gigi
Suppose IQ scores were obtained from randomly selected couples. For 20 such pairs of people, the linear correlation coefficient is 0.939 and the equation of the regression line is y = -11 + 1.14x, where x represents the IQ score of the husband. Also, the 20 x values have a mean of 100.9 and the 20 y values have a mean of 100.9. What is the best predicted IQ of the wife, that the husband has an IQ of 100? Use a significance level of 0.05. The best predicted IQ of the wife is ______. (Round to two decimal places as needed.)
Answer:
The wife IQ is 103 when the husband IQ is 100.
Step-by-step explanation:
The given equation of the regression line is y = -11 + 1.14x, where x represents the IQ score of the husband.
If the husband IQ is 100 the the wife IQ is
y = -11 + 1.14x,
y = -11 + 1.14(100)
y = -11 + 114
y = 103
Help me with this question
Find the properties of each Quadratic Function
Answer:
1.) up
2.) (-2,-5)
3.) x = -2
4.) (-2,-5)
5.) y = -5
6.) -∞ < x < ∞
7.) -5 < y < ∞
8.) (0,0)
9.) (0,0) and (-4,0)
10.) two solutions
Step-by-step explanation:
1.) because the parabola opens upward and the vertex is down
2.) the lowest point of the parabola is (-2,-5)
3.) If a line was drawn through the point x = -2, the two halves of the parabola would look symmetrical ( the same on both sides).
4.) The minimum point on the graph is ( -2,-5), because that is the lowest point on this upward parabola, and we can not determine the maximum.
5.) The minimum value of y is y = -5, because that is the lowest value of y on this graph, and we can not determine the maximum.
6.) Because the arms of the parabola continue traveling through negative infinity and positive infinity on the x-axis, the domain is -∞ < x < ∞.
7.) The arms of the parabola go from y = -5 to infinity, so the range of the parabola is -5 < y < ∞.
8.) The parabola first crosses the y-axis at the point (0,0)
9.) The parabola first crosses the x-axis at the points (0,0) and (-4,0)
10,) The solution to the parabola is the variable x. The solutions (x intercepts) of the parabola are x = 0 and x = -4.
Does this help you?
9) Maya has completed 35% of her math test. She answered 14 questions. 6 points
How many questions are on the test? *
9514 1404 393
Answer:
40
Step-by-step explanation:
If the number of questions on the test is Q, then we have ...
35% × Q = 14
Dividing by the coefficient of Q gives ...
Q = 14/0.35 = 40
There are 40 questions on the test.
consider the function and then use calculus to answer the questions that follow 1 1/x 5/x^2 1/x^3 (a) Find the interval(s) where the function is concave up. (Enter your answer in interval notation,do not round). (b) Find the interval(s) where the function is concave down. (Enter your answer in intervalnotation, do not round).
Answer:
a)[tex]X=((-15-\sqrt{201},(-15+\sqrt{201}),(0,\infty)[/tex]
b)[tex]Y=(\infty,\frac{1}{2}(-15-\sqrt{201} ) ),(\frac{1}{2}()-15+\sqrt{201)},0 )[/tex]
Step-by-step explanation:
From the question we are told that
The Function
[tex]f(x)=1+\frac{1}{x} +\frac{5}{x^2} +\frac{1}{x^3}[/tex]
Generally the differentiation of function f(x) is mathematically solved as
[tex]f(x)=1+\frac{1}{x} +\frac{5}{x^2} +\frac{1}{x^3}[/tex]
[tex]f(x)=\frac{x^3+x^2+5x+1}{x^2}[/tex]
Therefore
[tex]f'(x)=\frac{x^2+10x+3}{x^4}[/tex]
Generally critical point is given as
[tex]f'(x)=0[/tex]
[tex]\frac{x^2+10x+3}{x^4}=0[/tex]
[tex]x=-5 \pm\sqrt{22}[/tex]
Generally the maximum and minimum x value for critical point is mathematically solved as
[tex]f'(-5 \pm\sqrt{22})[/tex]
Where
Maximum value of x
[tex]f'(-5 +\sqrt{22})<0[/tex]
Minimum value of x
[tex]f'(-5 +\sqrt{22})<0[/tex]
Therefore interval of increase is mathematically given by
[tex]f'(-5 -\sqrt{22}),f'(-5 +\sqrt{22})[/tex]
[tex]f(x)<0,-\infty<x<(f'(-5 -\sqrt{22})) ,(f'(-5 +\sqrt{22}))<x<0,0<x< \infty[/tex]
Therefore interval of decrease is mathematically given by
[tex](-\infty,-5 -\sqrt{22}),f'(-5 +\sqrt{22},0),(0,\infty)[/tex]
Generally the second differentiation of function f(x) is mathematically solved as
[tex]f''(x)=\frac{2(x^2+15x+6)}{x^5}[/tex]
Generally the point of inflection is mathematically solved as
[tex]f''(x)=0[/tex]
[tex]x^2+15x+6=0[/tex]
Therefore inflection points is given as
[tex]x=\frac{1}{2} (-15 \pm \sqrt{201}[/tex]
[tex]f''(x)>0,\frac{1}{2}(-15-\sqrt{201}) <x<\frac{1}{2}(-15-\sqrt{201}) <x<0[/tex]
a)Generally the concave upward interval X is mathematically given as
[tex]X=((-15-\sqrt{201},(-15+\sqrt{201}),(0,\infty)[/tex]
[tex]f''(x)<0,-\infty<x<\frac{1}{2}(-15-\sqrt{201}) , \frac{1}{2}(-15-\sqrt{201}) <x<0[/tex]
b)Generally the concave downward interval Y is mathematically given as
[tex]Y=(\infty,\frac{1}{2}(-15-\sqrt{201} ) ),(\frac{1}{2}()-15+\sqrt{201)},0 )[/tex]
Find the value of x.
The value of x is: A. 38°
Factor Зу2 - 4у.
y(4 - Зу)
y(Зу - 4)
y(4y-3)
Point Z is a centroid of the triangle VWY. If VZ = 42 cm, what is VX?
63 cm
28 cm
21 cm
84 cm
Answer:
63 cm
Step-by-step explanation:
VZ = 42cm
ZX = 21
42/2= 21
What is 42 + 21 ?
There you go, you have your answer!
VX = 63cm
Triangle is a two-dimensional figure which has three sides and the sum of the three angles is equal to 180 degrees.
If Z is the centroid of the triangle VWY
VZ = ZX
VX = VZ + ZX
The value of VX is 84 cm.
Option D is the correct answer.
What is a triangle?It is a two-dimensional figure which has three sides and the sum of the three angles is equal to 180 degrees.
We have,
Point Z is a centroid of the triangle VWY.
VZ = 42 cm
Now,
Centroid means,
VZ = 42 cm
VZ = ZX
VX = VZ + ZX
VX = 42 + 42 = 84 cm
Thus,
The value of VX is 84 cm.
Option D is the correct answer.
Learn more about triangles here:
https://brainly.com/question/25950519
#SPJ2
I’ll give points + brainalist for correct answer (:
Answer:
C) 2
Step-by-step explanation:
Emma: Range = 8
Arianna: Range = 6
The difference in the range is 2 (8-6)
Answer:
C) 2
Step-by-step explanation:
Emma:
Max = 20
Min = 12
Range = 20 - 12
Range = 8
Arianna:
Max = 18
Min = 12
Range = 18 - 12
Range = 6
Difference between the 2 ranges:
8 - 6 = 2
solve for x please help besties!!
Answer:
if 2 means multiply by 2, the answer would be 12. If it just is there as a hint then the answer is 24.
Step-by-step explanation:
Hope this helps!
In the diagram, the measures of 1 and 4 are 100. The measure of 5 and 8 are 110. Are lines C and D parallel
B on Ap3x.............
Answer:
B
Step-by-step explanation:
is this right? Please tell me....
Answer:
yes
Step-by-step explanation:
Answer:
YES IT IS!!
Step-by-step explanation:
!!
Sam and you are going to paint your room together.
Sam takes 10 minutes to paint 25 square feet.
It takes you 5 minutes to paint 25 square feet.
Sam says, "If we paint together, then it will take 15 minutes for us to cover
feet."
TI
of
Give an explanation to convince Sam that she is incorrect.
.
Answer:
Sam is incorrect because you would not add the two times together. Hence there being 2 people working it would take you guys less time. You would actually subtract the times to get 5 minutes
Step-by-step explanation:
Answer:
Sam 's thinking is incorrect.
Step-by-step explanation:
Because If Sam takes 10 minutes to paint 25 square feet, then 5 minutes will be paint 12.5 sf... So if 15 minutes will paint 37.5 square feet. (by Sam)
---For me: if 5 mutes to paint 25 square feet.--->10 minutes will be 50 sf---> then 15 minutes will paint 75 square feet...
So If Same and I paint together will be 12.5 + 75 = 112.5 square feet
---Not 50 square feet...
What Sam says is incorrect....He can't add times together., that' s wrong.
Which of the following is a ray as shown in the drawing?
PLZ ANSWER FAST I HAVE TIME LIMIT Find exact values for all the solutions to the equation tan theta= - sqrt3/3 for, -2[tex]\pi[/tex] [tex]\leq[/tex] theta[tex]\leq[/tex] 2[tex]\pi[/tex]
Answer:90
Step-by-step explanation:
The Cramer's Rule states that, in a system of equation in two unknowns, in which determinants D is not 0, X=_____and Y=_____.
Answer:
Step-by-step explanation:
[tex]x=\frac{D_{1}}{D} \\y=\frac{D_{2}}{D}[/tex]
ILL GIVE BRAINLEST, find the value of x
Answer:
in my panies
Step-by-step explanation:
Telephone Company Project
6 x (4 + 2 x 4) + 10
Hurry need help
What is a 7 - 0.9 = *
Answer: 6.1
Step-by-step explanation:
Answer:
6.1
Step-by-step explanation:
have a good day/night may i please have a branlliest
Translate to a quadratic equation, then solve using the quadratic formula.
A positive integer squared plus 5 times its consecutive integer is equal to 11. Find the integers.
Answer:
The integer is 1
Step-by-step explanation:
Required
Translate and solve
Let the positive integer be x.
So, we have;
The square of the integer is: x^2
Plus 5 times its consecutive integer is: x^2 + 5(x + 1)
Equals 11 is: x^2 + 5(x + 1) = 11
So, we have:
[tex]x^2 + 5(x + 1) = 11[/tex]
Open bracket
[tex]x^2 + 5x + 5= 11[/tex]
Subtract 11 from both sides
[tex]x^2 + 5x -6= 0[/tex]
Expand
[tex]x^2 + 6x - x-6= 0[/tex]
Factorize:
[tex]x(x + 6) - 1(x+6)= 0[/tex]
Factor out x + 6
[tex](x - 1) (x+6)= 0[/tex]
Split
[tex]x - 1 = 0\ or\ x + 6 = 0[/tex]
Solve for x in both cases
[tex]x = 1\ or\ x = -6[/tex]
Since the number is positive, then [tex]x = 1[/tex]
A coffee machine dispenses normally distributed amounts of coffee with a mean of 12 ounces and a standard deviation of 0.2 ounces. If a sample of 9 cups is selected, find the probability that the mean of the sample will be less than 12.1 ounces.
Answer:
0.9332 = 93.32% probability that the mean of the sample will be less than 12.1 ounces.
Step-by-step explanation:
To solve this question, we need to understand the normal probability distribution and the central limit theorem.
Normal Probability Distribution:
Problems of normal distributions can be solved using the z-score formula.
In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.
Central Limit Theorem
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
Mean of 12 ounces and a standard deviation of 0.2 ounces.
This means that [tex]\mu = 12, \sigma = 0.2[/tex]
Sample of 9:
This means that [tex]n = 9, s = \frac{0.2}{\sqrt{9}}[/tex]
Find the probability that the mean of the sample will be less than 12.1 ounces.
This is the pvalue of Z when X = 12.1. So
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
By the Central Limit Theorem
[tex]Z = \frac{X - \mu}{s}[/tex]
[tex]Z = \frac{12.1 - 12}{\frac{0.2}{\sqrt{9}}}[/tex]
[tex]Z = 1.5[/tex]
[tex]Z = 1.5[/tex] has a pvalue of 0.9332
0.9332 = 93.32% probability that the mean of the sample will be less than 12.1 ounces.
Janice is rolling a fair number cube that is numbered 1 - 6. Which statement is true?
Answer:
Where r the statements?
Step-by-step explanation:
a 300 gallon tank is initially full and water is being drained at a rate of 4 gallons per minute.
does the intercept involving time have any physical meaning in this problem? explain
Answer:
Yes, it's when the tank is out of water.
Step-by-step explanation:
PLEASE HELP!!!
A)
B)
C)
D)
Answer:
b i think
Step-by-step explanation:
Solve for X. Assume that lines which appear to be diameters are actual diameters. Show work pls.
9514 1404 393
Answer:
x = -6
Step-by-step explanation:
The three marked angles total 180°, the number of degrees in a semicircle.
(x +51) +65 +70 = 180
x = 180 -186 = -6 . . . . . . . . subtract 186 and simplify
The value of x is -6.
Michael is debating the two job offers below. Determine which will result in a higher income.
OFFER A
$34,500 ANNUALLY
OFFER B
$2,885 MONTHLY
B
Step-by-step explanation:
In a year, offer B would be more. Since annually is once a year and there are 12 months in a year, multiplying B by 12 would get each to a year.
i need help with this pls 9.1k=63.7
Answer:
k = 7
Step-by-step explanation:
63 ÷ 9 = 7