Answers
Related Questions
PLEASE HELP!! Which of the following are considered skew lines?
A- AC and CD
B- DH and BF
C- EG and FH
D- AE and GH
Answers
Answer:
A
Step-by-step explanation:
Hope this helps hope you get it right
A uniformly distributed random variable has minimum and maximum values of 20 and 60, respectively.
a. Draw the density function.
b. Determine P(35 < X < 45).
c. Draw the density function including the calculation of the probability in part (b).
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```
|
|
|
|
| ___________
| | |
| | |
|_____|___________|
20 35 60
```
b. To find P(35 < X < 45), we need to find the area of the rectangle between x = 35 and x = 45. The height of the rectangle is 1/40 and the width is 45 - 35 = 10. Therefore, the area is:
P(35 < X < 45) = (1/40) * 10 = 1/4
c. Here is the density function with the shaded area representing the probability from part (b):
```
|
|
|
|
| ___________
| | |
| | |
|_____|___________|
20 35 60
|
|
|
|
| ___________
| | |
| | |
|_____|___________|
35 45
```
The shaded area represents the probability P(35 < X < 45), which is 1/4.
Find the exact length of the third side.
12
9
Answers
Answer:
6?
Step-by-step explanation:
Answer:
3 is the answer thing
a new car is purchased for 18500 dollars. the value of the car depreciates at 8% per year. to the nearest tenth of a year, how long will it be until the value of the car is 9100 dollars?
Answers
Answer:
8.5 years
Step-by-step explanation:
You want to know the number of years until 18500 depreciates to 9100 at the rate of 8% per year.
ValueThe depreciation rate given as a percentage of current value tells you the depreciation is exponential. The formula will be ...
value = (initial value) × (1 - (depreciation rate))^t
where the rate is "per year" and t is in years.
Applicationvalue = 18500·(1 -0.08)^t
9100 = 18500·0.92^t . . . . fill in the value of interest
9100/18500 = 0.92^t . . . . divide by 18500
log(91/185) = t·log(0.92) . . . . take logarithms
t = log(91/185)/log(0.92) ≈ -0.3081/-0.03621 ≈ 8.509
It will be about 8.5 years until the value is $9100.
__
Additional comment
The graph shows the solution to ...
18500·0.92^t -9100 = 0
We find it fairly easy to locate an x-intercept, so we wrote the equation in the forms that makes the x-intercept the solution.
suzanne receives a t-score of -3.6 in her bone mineral density (bmd) test results. what does this score indicate to her doctor?
Answers
A T-score of -3.6 indicates that the individual has a severe case of osteoporosis
A T-score is a standard score used to compare an individual's bone mineral density (BMD) to that of a healthy young adult population. A T-score of -3.6 on a BMD test indicates that the individual's BMD is significantly lower than that of a healthy young adult. Specifically, it means that the individual's BMD is 3.6 standard deviations below the average BMD of a healthy young adult.
A T-score of -2.5 or lower is considered to indicate osteoporosis, which is a condition characterized by low bone density and an increased risk of fractures. Therefore, a T-score of -3.6 indicates that the individual has a severe case of osteoporosis, and the doctor will likely recommend treatment such as medication and lifestyle changes to help increase bone density and reduce the risk of fractures.
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Differentiate the function by rewriting before and after differentiating. begin y = 5x7 3
Answers
A. The function y = 5x^7 - 3 can be differentiated using the power rule of differentiation.
B. To differentiate the function y = 5x^7 - 3, we can apply the power rule of differentiation.
According to the power rule, the derivative of x^n, where n is a constant, is given by nx^(n-1).
In this case, we have y = 5x^7 - 3.
To differentiate y, we differentiate each term separately.
The derivative of 5x^7 is (5)(7)x^(7-1) = 35x^6, and the derivative of -3 is 0 since it is a constant.
Therefore, after differentiating, the function becomes dy/dx = 35x^6 + 0 = 35x^6.
In summary, by applying the power rule of differentiation, the original function y = 5x^7 - 3 is rewritten as dy/dx = 35x^6 after differentiating.
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A z-test with a z observed of 2.56 (two-tailed) would have a p-value of ______, which would lead a research to _______ the null hypothesis if alpha is .05.
Answers
A z-test with a z observed of 2.56 (two-tailed) would have a p-value of 0.010467 , which would lead a research to reject the null hypothesis if alpha is .05.
Given:
z - score = 2.56
p value at z = 2.56 is:
p = 0.010467
The result is statistically significant: you can reject the null hypothesis and accept the alternative.
This decision is made at significance level α = 0.05.
Therefore a z-test with a z observed of 2.56 (two-tailed) would have a p-value of 0.010467 , which would lead a research to reject the null hypothesis if alpha is .05.
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The circle below is centred at O. Decide which length, if any, is definitely the same as the length a) AD. b) BC. Justify your answers. A B E Not drawn accurately Answer>
Answers
a) No length that is the same as AD.
b) No length that is the same as BC.
a) To find a length definitely the same as AD, we need to identify a line segment that shares the same properties with AD.
Since the circle is centered at O, and A and D are points on the circle, we can conclude that AD is a chord of the circle. Another chord in the circle is BC, as both B and C are points on the circle as well.
However, without further information about the circle or the angles, we cannot determine if AD and BC are definitely the same length.
So, there is no length that is definitely the same as AD.
b) To find a length definitely the same as BC, we need to identify a line segment that shares the same properties with BC. As mentioned earlier, BC is a chord of the circle.
Another chord in the circle is AD, but as stated previously, we cannot determine if AD and BC are definitely the same length without additional information.
So, there is no length that is definitely the same as BC.
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Determine whether one figure is a dilation of the other. Complete the justification.
Quadrilateral DEFG has side lengths of 20 m, 24 m, 28 m, and 16 m. Quadrilateral D'E'F'G' has side lengths of 45 m, 54 m, 63 m, and 36 m.
The figure D'E'F'G' (is/not) a dilation of the figure DEFG. The ratios of the lengths of the corresponding sides (are/are not) equal.
Answers
Answer:
The figure D'E'F'G' is a dilation of the figure DEFG. The ratios of the lengths of the corresponding sides are equal.Step-by-step explanation:
We can figure the ratios of corresponding sides as ...
45/20 = 2.25
54/24 = 2.25
63/28 = 2.25
36/16 = 2.25
The ratios of corresponding sides are equal, so the figures are dilations of each other.
_____
Additional comment
Another way to look at corresponding sides is to find the ratio each side has to the other sides in the same figure.
20 : 24 : 28 : 16 = 5 : 6 : 7 : 4 . . . . . . multiples of 4
45 : 54 : 63 : 36 = 5 : 6 : 7 : 4 . . . . . . multiples of 9
The reduced ratios are the same, so corresponding sides are proportional. (The ratio of larger to smaller is 9/4 = 2.25.)
The measures of the angles of a triangle are shown in the figure below. Solve for x.
(9x-1)º
74°
62°
PLS HURRY!!
Answers
In the given triangle, the value of x = 5.
What is a triangle's definition?
A triangle is a geometrical shape that is defined as a polygon with three sides and three angles. It is a closed figure with three line segments as its sides, and these sides intersect at three points, which are called vertices. When we add all the angles of a triangle then the result will always be 180°.
Now,
As we know the property of a triangle that
sum of all angles of triangle=180°
given angles are (9x-1)°, 74° and 62°
then,
9x-1+74+62=180°
9x+135=180
9x=45
x=5
Hence,
the value of x is 5.
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a You have a bet where you win $50 with a probability of 40% and lose $50 with a probability of 60%. What is the standard deviation of the outcome (to the nearest dollar)? O 55 O 51 O 49 053
Answers
The standard deviation of the outcome for the given bet is approximately $51.
To obtain this result, we can use the following formula for the standard deviation of a random variable with two possible outcomes (winning or losing in this case):SD = √(p(1-p)w² + p(1-p)l²),where SD is the standard deviation, p is the probability of winning (0.4 in this case), w is the amount won ($50 in this case), and l is the amount lost ($50 in this case).
Plugging in the values, we get:SD = √(0.4(1-0.4)(50²) + 0.6(1-0.6)(-50²))≈ $51
Therefore, the standard deviation of the outcome of the given bet is approximately $51.Explanation:In statistics, the standard deviation is a measure of how spread out the values in a data set are.
A higher standard deviation indicates that the values are more spread out, while a lower standard deviation indicates that the values are more clustered together.
In the context of this problem, we are asked to find the standard deviation of the outcome of a bet. The outcome can either be a win of $50 with a probability of 40% or a loss of $50 with a probability of 60%.
To find the standard deviation of this random variable, we can use the formula:SD = √(p(1-p)w² + p(1-p)l²),where SD is the standard deviation, p is the probability of winning, w is the amount won, and l is the amount lost.
Plugging in the values, we get:SD = √(0.4(1-0.4)(50²) + 0.6(1-0.6)(-50²))≈ $51Therefore, the standard deviation of the outcome of the given bet is approximately $51.
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The variables x and y vary inversely, and y = 4 when x = 6. Write an equation that relates x and y. Then find y when x = -8.
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The equation that relates x and y is 4 = k/6 and the value of y when x = -8 will be -3.
How to solve the inverse variation?From the information given, the variables x and y vary inversely, and y = 4 when x = 6. Therefore, the equation that relates x to y will be:
y = k/x
4 = k/6
k = 4 × 6 = 24
The value of y when x = -8 will be:
y = k/6
y = 24/-8
y = -3.
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2. Let f(x) = 2x² + 2. Find each of the following:
a. f(-3)
b. f(6)
c. f(-1)
d. f(4)
Answers
Answer: The answers are in the steps please look carefully.
Step-by-step explanation:
To solve for each value input the value into the function and solve to find f(x)
A. f(-3) = 2(-3)^2 + 2
f(-3) = 2(9) + 2
f(-3) = 18 + 2
f(-3) = 20
B. f(6) = 2(6)^2 + 2
f(6) = 2(36) + 2
f(6) = 72+ 2
f(6) = 74
C. f(-1) = 2(-1)^2 + 2
f(-1) = 2(1) + 2
f(-1)= 2 + 2
f(-1) = 4
D. f(4) = 2(4)^2 + 2
f(4) = 2(16) + 2
f(4) = 32 + 2
f(4) = 34
The values of the function are given below:-
a. f(-3) = 20
b. f(6) = 74
c. f(-1) = 4
d. f(4) = 34
What is a function?A function is defined as the expression that set up the relationship between the dependent variable and independent variable.
The value of the function at x is equal to -3:-
f(-3) = 2(-3)^2 + 2
f(-3) = 2(9) + 2
f(-3) = 18 + 2
f(-3) = 20
The value of the function at x is equal to 6:-
f(6) = 2(6)^2 + 2
f(6) = 2(36) + 2
f(6) = 72+ 2
f(6) = 74
The value of the function at x is equal to -1:-
f(-1) = 2(-1)^2 + 2
f(-1) = 2(1) + 2
f(-1)= 2 + 2
f(-1) = 4
The value of the function at x is equal to 4:-
f(4) = 2(4)^2 + 2
f(4) = 2(16) + 2
f(4) = 32 + 2
f(4) = 34
Therefore, the values are 20, 74, 4, and 34.
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7TH GRADE MATH NEED ASAP
Answers
Answer:
63,590.4
Step-by-step explanation:
8<8<18=1,152x 9216x = 63,590.4
How much will it cost to paint the treasure chest below? A pint of paint can cover 5 ft2 and costs $4.50. You do not need to paint the bottom of the treasure chest.
please show work. its late for geometry and I really need to pass. i will mark brainliest :)
Answers
Answer:
I saw people trolling your answer here is the answer! I am sorry what people are doing to you!
There is a rectangle and a cylinder
5ft cost 4.50
Area is 643
Now
643x4.5
Answer:
Around 2893.5
si tenemos una pantalla de television, cuyos lados mide 2x+4 y 5x+5, cuales el perimetro de la pantalla?
Answers
Answer:
P=14x+18
Step-by-step explanation:
perimeter:
P=2(2x+4)+2(5x+5)=4x+8+10x+10=14x+18
I hope this help you
Find the missing length indicated
I WILL GIVE BRAINLIEST TO CORRECT ANSWER
Answers
Answer:
i think 9
Step-by-step explanation:
Answer:
its 9 (a) your welcome
y-int coordinates of y=x^2-5x+6, please explain
Answers
The y intercepts of the quadratic equation y = x² - 5x + 6 is given by (0 , 6)
and the x intercepts are ( 3 , 0 ) and ( 2, 0 )
What is Quadratic Equation?A quadratic equation is a second-order polynomial equation in a single variable x , ax² + bx + c=0. with a ≠ 0. Because it is a second-order polynomial equation, the fundamental theorem of algebra guarantees that it has at least one solution. The solution may be real or complex.
The roots of the quadratic equations are
x = [ -b ± √ ( b² - 4ac ) ] / ( 2a )
where ( b² - 4ac ) is the discriminant
when ( b² - 4ac ) is positive, we get two real solutions
when discriminant is zero we get just one real solution (both answers are the same)
when discriminant is negative we get a pair of complex solutions
Given data ,
Let the quadratic equation be represented as A
Now , the value of A is
y = x² - 5x + 6 be equation (1)
On simplifying the equation , we get
y = x² - 2x - 3x + 6
Taking the common factors of the equation , we get
y = x ( x - 2 ) - 3 ( x - 2 )
On factorizing the equation , we get
y = ( x - 3 ) ( x - 2 )
To find the y intercepts , substitute the value of x = 0 , we get
y = ( 0 - 3 ) ( 0 - 2 )
y = ( -3 ) ( -2 )
So , y = 6
Hence , the y intercepts of the equation is ( 0 , 6 )
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Problem 2:
The lifespan of a particular brand of light bulb follows a normal distribution with a mean of 1000 hours and a standard deviation of 50 hours.
Find:
a) the z-score of light bulb with a mean of 500 hours.
b) If a customer buys 20 of these light bulbs, what is the probability that the average lifespan of these bulbs will be less than 980 hours?
c) the probability of light bulbs with the mean of 400 hours.
d) the number of light bulbs with the mean less than 1000 hours
Answers
The answers are:
a) The z-score for a light bulb that lasts 500 hours is -10.
b) For a sample of 20 light bulbs, the probability that the average lifespan will be less than 980 hours is approximately 0.0367, or 3.67%.
c) The z-score for a light bulb that lasts 400 hours is -12. This is even more unusual than a lifespan of 500 hours.
d) Given the lifespan follows a normal distribution with a mean of 1000 hours, 50% of the light bulbs will have a lifespan less than 1000 hours.
How to solve the problema) The z-score is calculated as:
z = (X - μ) / σ
Where X is the data point, μ is the mean, and σ is the standard deviation. Here, X = 500 hours, μ = 1000 hours, and σ = 50 hours. So,
z = (500 - 1000) / 50 = -10.
The z-score for a bulb that lasts 500 hours is -10. This is far from the mean, indicating that a bulb lasting only 500 hours is very unusual for this brand of bulbs.
b) If a customer buys 20 of these light bulbs, we're now interested in the average lifespan of these bulbs. . In this case, n = 20, so the standard error is
50/√20
≈ 11.18 hours.
z = (980 - 1000) / 11.18 ≈ -1.79.
The probability that z is less than -1.79 is approximately 0.0367, or 3.67%.
c) The z-score for a bulb with a lifespan of 400 hours can be calculated as:
z = (400 - 1000) / 50 = -12.
The probability associated with z = -12 is virtually zero. So the probability of getting a bulb with a mean lifespan of 400 hours is virtually zero.
d) The mean lifespan is 1000 hours, so half of the light bulbs will have a lifespan less than 1000 hours. Since the lifespan follows a normal distribution, the mean, median, and mode are the same. So, 50% of light bulbs will have a lifespan less than 1000 hours.
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if the diagonals of a parallelogram are perpendicular then what would be the best and most restrictive description of that quadrilateral?
Answers
The best and most restrictive description of that quadrilateral is Rhombus.
The line segment joining the parallelogram's non-adjacent vertices is known as the diagonal. A parallelogram has two diagonals, and depending on the parameters and dimensions given, it is possible to determine the length of the diagonals using a variety of formulas. In this post, let's learn more about a parallelogram's diagonals.
Given: if the diagonals of a parallelogram are perpendicular then what would be the best and most restrictive description of that quadrilateral?
ABCD is Parallelogram . E is midpoint
As Since the diagonals of the parallelogram bisect each other.
BE and DE are congruent.
We have given that all four angles at E are 90 degrees. So, they are congruent.
Therefore, triangle ABE and ADE are congruent by side-angle-side.
Therefore, AB and AD are congruent.
Since opposite sides of the parallelogram are congruent.
AD and BC are congruent and AB and CD are congruent.
So, all four sides are congruent.
Hence, The best and most restrictive description of that quadrilateral is Rhombus
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X
3
2
1
0
-1
-2
-2
Y
12
10
8
6
4
2
0
Find the domain and range
Answers
Answer:
domain: all x-values
Step-by-step explanation:
The number less than zero are called
Answers
Answer:
Step-by-step explanation: Negatives because a number lower than 0 go like this -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 see? so the answer is Negatives.
Colleen earns $5 for each hour of yard work. Write an equation that shows the relationship between the time spent x and the amount earned y.
Write your answer as an equation with y first, followed by an equals sign
Answers
Answer:
Easy
Step-by-step explanation:
Y=5x
I hope this helps
Evaluate 8.1p + 7.9 when p = 6 and r = 7
Answers
Answer:
56.5
Step-by-step explanation:
Can the distributive property be used to rewrite
6 x (8 - 4) ?
Yes
No
If yes, fill in the blanks below.
6 x
8 -
(OⓇD) - (x)
Answers
Answer:
I think No
Step-by-step explanation:
What is the sum of 2/8+3/9?????
Answers
Answer:42/72 simplify =7/ 12
Step-by-step explanation:
anyone else’s brainly heating up their phone like crazy
Answers
Mine is not heating up I don't know about others
Walter purchased a 2010 model sedan for $24,000. The dealership offered him a $199/month payment plan for 48 months, at the end of which the unpaid balance will be due. If the interest rate is 6%, find the total cost of this vehicle, including the balloon payment.
Answers
Answer:
199x48 = 9552
24000-9552=14448
14448 x- 6% = 866.88
14448+866.88= 15314.88
The overall payment is 24000+6%
Step-by-step explanation:
The total cost of the vehicle is $29760
What is Interest Rate ?The % at which a loan is given or the % at which your investment will give return is the Interest Rate.
It is given that
Walter purchased a 2010 model sedan for $24,000.
The dealership offered him a $199/month payment plan for 48 months,
Principal = $24000
Rate = 6%
Time =48 months = 4 years
The Simple interest =
24000 * 6 * 4 / 100
Interest = $5760
The payment done in 48 moths is
199 * 48 = $9552
The balloon payment due at the end of 48 months is 24000 + 5760 - 9552 = $20208
The total cost of the vehicle is $ 24000+ 5760 = $29760.
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NEED HELP ASAP
Given the following vectors in component form:
u = ⟨10, 12⟩
v = ⟨– 3, y⟩
5u = ⟨50, 60⟩
5v = ⟨–15, 5y⟩
5(u + v) = ⟨35, 40⟩
What is the y-component of vector v?
y = –3
y = –4
y = –20
y = 4
Answers
Answer:
B. y=-4
Step-by-step explanation:
please help i’m confused
Answers
Answer:
The answer is A. t = 0.4n
Step-by-step explanation:
See how on the graph, when n is 2, t is around 1? We just plug in 2 into n into the equation, t=0.4n. 0.4 times 2 is 0.8, so t=0.8. 0.8 is around 1, so a is right. If we tried the same thing with one of the other choices, like B. t=2.5n, then plugging in 2 into n would give us 2 times 2.5, which is 5. 5 is nowhere around 1, making it wrong.