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Rank #1 (22654 views). Category: Physics

Problem text:

Shear force and bending moments on a simply suported beam.

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Rank #2 (9765 views). Category: Algebra

Problem text:

If you have three lines with unequal slopes, how many possible intersections are there? Give examples

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Hello. Here's an answer to your question about the 3 lines intersecting. Interesting problem. Hope this solution helps.

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Rank #3 (8325 views). Category: Algebra II

Problem text:

Why do you factor a quadratic equation before you solve?

Why are there usually two solutions in quadratic equations?

Under what situation would one or more solutions of a rational equator be unacceptable?

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Rank #4 (8006 views). Category: Algebra

Problem text:

Could I please see steps
Solve x minus 6 minus 3(x plus 4)less than 0
1. Replace ? with an inequality sign that makes this statement true -32 ? - 17

2. Find 7-2 times 3 minus ( negative 4)

3. Identify the base and the exponent in the statement (3.17) 23 squared

4 Find 2 times ( negative 5) + ( negative 8) divided by (-4)
2
5. Find 3 + 4 minus 5 x (11 - 12)

6. Find the distance between the points negative 13 and negative 6

7. Find 5 over negative 9 x negative 3 over 7 divided by negative 25 over - 21

8. Find 8 - 2(83 - 4 [ 7 - 2 to the 3 power x (17 - 19] )

Exponents 5 squared
1. Calculate 2 negative identify the base and the exponent.

2. Find 16 to the negative 5/4 squared

3.. Find square root of 2 + square root of 8

4. Simplify using properties of exponents; write your answer using positive exponents.
13 squared 16 squared 8 square 24 squared
8 times z over 8 times z .
3
5. Find ( power root negative 137xy) to the 3rd power

6. I hope you will understand this next problem the sign looks like a check mark
in the little v area is the number 9 ( 158) 9 squared

7. Same type of problem but here are the numbers in the little v area of the square root sign is 4 ( negative 11) 4 squared

8. Find 7 square root x - 5 square root yz - (2 square root x - 15 square root yz) - square root with a 3 in the little v area square root of x

9. Simplify using properties of exponents; write your answer using positive exponents
(2x to the negative 3 x y to the 6th power) to the negative 4th power
10. Simplify The check mark sign again 5 in the v area then you have 64x to the 12 power y to the 19th power under that square root line

11. Find (2x + 4 square root 3y)(3x - 5 on the outside of the square root sign 3y)

12. Simplify; write your answer using positive exponents
(2x to the 4th power y to the negative 5th power) to the 3rd power x (2xy to the 2nd power) to the negative 4th power over (2x to the negative 1 y to the negative 2) to the negative 7th power
13. Simplify check mark symbol again a small 3 in the v area square root 9x to the 7th power y to the 5th power x check mark sign small 3 square root sign 6x to the 6th power y to the 10th power z to the 5th power

14. Rationalize the denominator and simplify check mark symbol small 3 in the v area square root 2x to 7th power y to the 5th power over
small 3 in the v area square root 3x to 6th power y to 10 power z to the 5th power.
3 5 4 4 7 9
15. Factor 24ab b minus 8a b plus 32a b

3 2
16. Factor ( 3x minus 5)(2x minus 7x plus 4)

2 2
17 Find (3a plus 7b)(2a minus 5b) minus 3(a minus 4ab minus 2b )
5 4
18 Factor negative 3(4x minus 1) negative (x + 2) minus (4x minus 1) negative

19.Reduce to the lowest terms x 2 squared minus 9 over 5x 2 squared minus 9x minus 18

20. Find 2 over y sq root 2 - y - 6 minus 3 over y squared 2- 7y + 12

21 Simplify 4 + 1/3x over 2 - 2/3x

22.Find 3b -7a / a sq root 2 - a - 2 + 5/ a - 2 minus 2/ a + 1

23. Solve this inequality for x: 3x - 1 < 5 Write your solution using interval notation

24. Solve this equation for x; ½x + 3½ = ½2x -½

25. Solve this inequality for x; ½3x + 2½³ 1
Graph your solution on a number line


26. Solve by completing the square x square root 2 + 8x - 5 = 0

27. Solve for x using the square root property 3(2x -1) 2 squared = 15

28 Solve for x by factoring; 6x 2 squared + 11x - 35 = 0

29. Solve for; 2x 4 squared + 20 = 13x 2 squared

30. Use the discriminant to determine the type of solutions 0f 5x squared 2 + 10 = 7x




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Rank #5 (6910 views). Category: Algebra II

Problem text:

1. Which of the following are functions? Explain your reasoning for a, b, and c.

a. f(x)=1 if x>1
f(x)=0 otherwise

b. f(x)=2 if x>0
f(x)=-2 if x<0
f(x)=2 or -2 if x=0

c. f(x)=5/x

2. Suppose you have a lemonade stand, and when you charge $1 per cup of lemonade you sell 60 cups. But when you raise your price to $2 you only sell 30 cups. Write an equation for the number of cups you sell as a function of the price you charge. Denote "C" for number of cups, and "P" for the price you charge. Assume the function is linear.

3. Take a look at the table below and write out an equation for f(x).
x -2 -1 0 1 2
f(x)-1 1 3 5 7

4. For each of the relationships below, explain whether you think it is best described by a linear function or a non-linear function. Explain your reasoning throughly.

a. How fast it takes you to get to work as a function of how fast you drive.

b. Probability of getting into a car accident as a function of how fast you drive.

c. Your height as a function of age (from age 0 to 100)

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Hope the solutions help

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Rank #6 (6467 views). Category: Statistics

Problem text:

1.two cards are drawn without replacement from a deck of 52 cards. What is the probability of drawing two queens?
2. What is the probability that one throw of two dice (one red and one green) will result in a sum of 10?
3. A bag contains 3 white marbles and 2 black marbles. Two marbles are drawn from the bag with the first marble not being returned to the bag for the second drawing. What is the probability of getting 1 white marble and 1 black marble?
4. A committee of 4 is to be picked from 6 men and 4 women. What is the probabilty that half of the commitee will be made up of women?
5. In tossing one die, what is the probability that you will get a six on the first toss, not a six in the second toss, and not a six on the third toss?
6. A coin is tossed 3 times. What is the robability of getting: (a) 3 heads (b) 2 heads, 1 tail (c) 1 head, 2 tails, (d) 3 tails?
7. There are 6 red balls and 9 blue balls in a box. (a) if the first ball is replaced before the second ball is drawn, what is the probability of drawing 2 red balls? (b) If the first ball is not replaced before the second ball is drawn, what is the probability of drawing 2 red balls?
8.Two dice (one green and one white) are tossed. (a) What is the probability of getting a sum of 2 or a sum of 12? (B) What is the probability of getting an even number (the sum is even) or a sum that is greater than or equal to 9?
9. One coin and one die are tossed. Make a sample space that will represent all the possible outcomes. What is the probability of getting a tail and at least a four when the con and die are tossed?
10. Two cards are drawn from a deck of 52 cards without replacement. (a) What is the probability of drawing a face card on the first draw and an ace on the second draw? (b) What is the probability of getting a face card and and ace from the two draws (order is ot important)?
11. What is ther probability if you are dealt 13 cards that they are all of one suit? (Do not calculate, just set up the problem)
If you are dealt 5 cards, what is the probability that you will get exactly 3 aces (3 of the 5 cards are aces)? (Do not calculate, just set up the problem).
12. What is the probability of throwing exactly 3 aces in a single throw with 4 dice?
13. A person rolls a 6 sided die, and an 8 sided die. (a) create the sample space. (b) also, find the probability of getting a sum of 12. (c) find the probability of getting an even sum or a sum of 11 or more.
14.The probability that a college student does not graduate is .3 (3/10). Of 5 college students chosen at random, find the probabilty (a) one will not graduate (b) three will not graduate (c) at least 4 will graduate.
15. Sharpshooter A hits the targe 1/4 of the time. Sharpshooter B hits the target 2/5 of the time. If they both shoot, what is the probability they at least one sharpshooter will hit the target?


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Rank #7 (6466 views). Category: Physics

Problem text:

A car rounds a banked curve where the radius of curvature on the road is R, the banking angle is A, and the coefficient of friction is F. (a) Determine the range of speeds the car can have without slipping up or down the road. [Answer:8.6m/s] (b) What is the range of speeds possible if R=100m, A=30, and F=10 (slippery conditions)? [Answer:17m/s]Explain step by step.

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Rank #8 (5783 views). Category: Word Problem

Problem text:

When Kate worked 10hours overtime she earned $8 more than one third the amount she earns for 40 hours of work at her usual rate. If her overtime rate is $2.40 per hour more than her usual rate, find her overtime rate.

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Hope this helps

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Rank #9 (5736 views). Category: Money Problems

Problem text:

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Note: I tried to complete the whole question sheet but ran out of time. I hope that I have been of help to you in the little time I could work on it. Thank you very much for this posting. You may pay me whatever you think is reasonable.

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Rank #10 (5680 views). Category: Calculus

Problem text:

Calculate y' (y prime)

1. y = cos(tanx)

2. y = e^(-1)*(t^2-2t+2)

3. y = sin^(-1)*(e^x)

4. y = x^r*e^(sx)

5. y = 1/(sin(x-sinx))

6. y = ln(csc5x)

7. x^2 cosy + sin2y = xy

8. y = ln(x^2*e^2)

9. y = sec(1+x^2)

10. y = (cosx)^x

11a. By differentiating the double-angle formula:
cos2x = cos^(2)x - sin^(2)x
obtain the double-angle formula for the sin function.

11b. By differentiating the addition formula:
sin(x+a) = sinx*cosa + cosx*sina
obtain the addition formula for the cosine function.

12. The cost in dollars of producing x units of a certain commodity is: C(x) = 920 + 2x - 0.02x^2 + 0.00007x^3
a) Find the marginal cost function
b) Find C'(100) and explain its meaning
c) Compare C'(100) with the cost of producing the 101st item.

Thank You!

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Rank #11 (5387 views). Category: Algebra II

Problem text:

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Rank #12 (5278 views). Category: Strange, Advanced Stuff

Problem text:

Prove that the intersection of two subgroups is a subgroup.

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Rank #13 (4970 views). Category: Statistics

Problem text:

Please make this readable for a layman. Data needed to complet this question are in the attached Excel sheets. Thanks.

1. Read Case Problem: Forecasting Food and Beverage Sales. Be sure to read the case thoroughly, analyze the raw data, and answer all questions as required per case instructions. Prepare a 700 to 1,400-word case summary that meets the case study parameters defined in Week Two. (Reference: Anderson, Sweeney, Williams, 2002, p. 264) Cut and paste the results from EXCEL or MiniTab into your paper.

The Vintage Restaurant is on Captiva Island, a resort community near Fort Myers, Florida. The restaurant, which is owned and operated by Karen Payne, has just completed its third year of operation. During that time, Karen has sought to establish a reputation for the restaurant as a high-quality dining establishment that specializes in fresh seafood. The efforts by Karen and her staff have proven successful, and her restaurant has become one of the best and fastest-growing restaurants on the island. Karen has concluded that to plan for the growth of the restaurant in the future, she needs to develop a system that will enable her to forecast food and beverage sales by month for up to one year in advance. Karen has the following data ($1000s) on total food and beverage sales for the three years of operation. The data can be found in an Excel spreadsheet (Lost Beverage and Food Sales).
Perform an analysis of the sales data for the Vintage Restaurant.
Prepare a report for Karen that summarizes your findings, forecasts, and recommendations. Include:
a. A graph of the time series.
b. An analysis of the seasonality of the data. Indicate the seasonal indexes for each month, and comment on the high and low seasonal sales months. Do the seasonal indexes make intuitive sense? Discuss.
c. A forecast of sales for January through December of the fourth year.
d. Recommendations as to when the system that you have developed should be updated to account for new sales data.
e. Any detailed calculations of your analysis in the appendix of your report.
f. Assume that January sales for the fourth year turn out to be $295,000. What was your forecast error? If this is a large error, Karen may be puzzled about the difference between your forecast and the actual sales value. What can you do to resolve her uncertainty in the forecasting procedure?

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Rank #14 (4740 views). Category: Algebra II

Problem text:

What is the situation when two inequalities have no solution?

What are the conditions when the solution of a system of
inequalities will be in the first quadrant?

Why does the graph of a quadratic intercept the y-axis at only one point?

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Rank #15 (4591 views). Category: Strange, Advanced Stuff

Problem text:

Need the folloowing answered

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Rank #16 (4552 views). Category: Calculus

Problem text:

The problem is mainly one of calculus with quadratic functions, logs and analysis. I would like solutions
please with explanation. File is jpeg (adjust to 25% SIZE
to read file)

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Hi, I hope this helps.

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Rank #17 (4483 views). Category: Statistics

Problem text:

Schadek Silkscreen Printing, Inc. purchases plastic cups on which to print logos for sporting events, proms, birthdays, and other special occasions. Zack Schadek, the owner, received a large shipment this morning. To ensure the quality of the shipment, he selected a random sample of
300 cups. He found 15 to be defective.
a. What is the estimated proportion defective in the population?
b. Develop a 95 percent confidence interval for the proportion defective.
c. Zack has an agreement with his supplier that he is to return lots that are 10 percent or more defective. Should he return this lot? Explain your decision.

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Rank #18 (4035 views). Category: Business/Financial math

Problem text:

Ten problems that are finacial based. I will pay $8.00 per problem answered.

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Rank #19 (3910 views). Category: Algebra

Problem text:

Write the equation in slope-intercept form and in standard form:

a) The graph of the line shows that it intercepts the y-axis at 3.5 and passes through the point (1,6).


b) The line passes through (1,1) and is parallel to 6x - 3y = 5.


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Rank #20 (3909 views). Category: Statistics

Problem text:

Parametric and Nonparametric Data Identification Assignment

Label each of the following situations “P” if it is an example of parametric data or “NP” if it is an example of nonparametric data.

1. In a comparison of two towns, is the average height of its residents the same? _____

2. A manufacturer produces a batch of memory chips (RAM) and measures the mean-time-between-failures (MTBF). The manufacturer then changes a manufacturing process and produces another batch and again measures the MTBF. Did the change to the process improve the MTBF? _____

3. The average life span of a dog is proportional to the amount of calcium consumed. _____

4. The correlation between gene disorders and certain diseases. _____

5. From a written survey where the respondents were asked to rate an individual on a scale of 1 to 5, one group rated an individual a 3.7, another group rated the individual a 4.3. Is the difference statistically significant? _____

6. A study of vehicle accidents on a military installation compared to drivers' rank. _____

7. Show that the numbers drawn in a state lottery are truly random. _____

8. There is a direct correlation to a student's grade and the student's rating of an instructor. _____

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