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# Recent problems solved by 'solver91311'

solver91311 answered: 17063 problems
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 Money_Word_Problems/753314: okay please anwser if i produce a watch for $120 and i sell it for$150 what is the percentage of my profit please anwser quickly this is for a project1 solutions Answer 458319 by solver91311(17077)   on 2013-05-28 16:17:01 (Show Source): You can put this solution on YOUR website! I don't know how to anwser. I'm not even sure that is a word in the English language. Be that as it may, percent profit is given by , where is sell price and is dealer cost. You can do your own arithmetic. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Equations/752042: 17.791X + .11248Y = .19497Y What is X and What is Y1 solutions Answer 457531 by solver91311(17077)   on 2013-05-23 18:37:31 (Show Source): You can put this solution on YOUR website! Two variables and one equation. Pick a number for one of the variables and then do the arithmetic to find the other, but there are an infinite number of pairs that satisfy the equation. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Average/752036: what a 57 out of a 63 on a test on terms with 0 to 100 scale1 solutions Answer 457530 by solver91311(17077)   on 2013-05-23 18:35:53 (Show Source): You can put this solution on YOUR website! Divide 57 by 63. Multiply the result by 100. Round off to a precision that tickles your fancy. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Probability-and-statistics/752041: There are 6 cubes in a bag. Four cubes are red and 2 other cubes are blue. You draw a cube and put it back in the bag. You draw two more times. Find, the probability you draw red cubes all three times. Remember P (event a) x P ( event B) x (event C)1 solutions Answer 457529 by solver91311(17077)   on 2013-05-23 18:34:03 (Show Source): You can put this solution on YOUR website! Since you are replacing each time, the probability of a red on any draw is 4/6 or 2/3. Altogether 8/27. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Money_Word_Problems/752040: You are trying to plan for retirement in 20 years and currently have $85,000 in a savings account and$25,000 in a mutual fund. In addition you plan on adding to your savings account by depositing $1,500 at the end of each month for the next five years then$35,000 at the end of each year for the final fifteen years until retirement. a) Assuming your savings account returns 4 % (compounded semi-annually) while your mutual fund will return 9 % (compounded monthly). How much will you have saved (in total) at the end of 20 years? b) If you expect to live for 30 years after you retire and at retirement you deposit all of your savings (including the value of the mutual fund) into an account paying 7% (compounded annually), how much can you withdraw at the beginning of each month? For part (a) should I have two cash flows one for the mutual fund and one for savings account? and then calculate the future value for each cash flow?1 solutions Answer 457528 by solver91311(17077)   on 2013-05-23 18:32:34 (Show Source): You can put this solution on YOUR website! Just because I subscribe to the KISS (Keep It Simple Stupid) theory of problem solving, I would use three cash flow calculations. First the initial 5 years of 1500/month into the savings. Then, using the results of that calculation as the Present Value for the $35K/year for 15 years calculation. That gets you the future value for the savings at the 20 year point. Then just add that to the compouded interest in the Mutual Fund. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it  Money_Word_Problems/752032: Sue invests$5,000 in a 90-day term deposit that pays three percent simple interest per year. How much interest will Sue earn from her investment, to the nearest dollar?1 solutions Answer 457526 by solver91311(17077)   on 2013-05-23 18:22:25 (Show Source): You can put this solution on YOUR website! 90 days is 1/4 year, so for a 90 day term she will get 1/4 of the interest that the same amount of money would earn in 1 full year. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 test/752039: A card is drawn from a deck of cards and replaced. A second card is then drawn from the deck. Are these events independent or not independent?1 solutions Answer 457525 by solver91311(17077)   on 2013-05-23 18:18:18 (Show Source): You can put this solution on YOUR website! Does the outcome of the second trial depend on the outcome of the first trial? Does the probability that you will draw a specific card on the second draw change depending on what was drawn on the first card, given that the first card is replaced in the deck before making the second draw? John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Quadratic-relations-and-conic-sections/751999: Write the equation of the parabola that has its focus at (2,1) and directrix is x=-2?1 solutions Answer 457523 by solver91311(17077)   on 2013-05-23 18:13:05 (Show Source): You can put this solution on YOUR website! The equation of a parabola with focus at and directrix at is: Just plug in your numbers and simplify. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Permutations/751962: Most ATMs require that you enter a four-digit code, using the digits 0 to 9. How many 4-digit number codes can be formed a) without any restrictions? b) with all digits the same? c) with different digits? d) with alternate even and odd digits? e. with last two digits 0? f) with last two digits 0 or 1? g) with first digit 5? h) with first and last digits 5? i) with the middle two digits 0? j) 2 pairs of digits the same? k) 2 digits are the same and the other 2 digits are each different? 1 solutions Answer 457520 by solver91311(17077)   on 2013-05-23 17:53:44 (Show Source): You can put this solution on YOUR website! 1. 0 to 9 is 10 digits, so 10 X 10 X 10 X 10 = = 10,000 John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Trigonometry-basics/752021: explain why 60 degrees = the square root of 3. include a diagram with your explanation.1 solutions Answer 457515 by solver91311(17077)   on 2013-05-23 17:38:17 (Show Source): You can put this solution on YOUR website! 60 degrees does not equal the square root of 3. The sine of 60 degrees is . Draw yourself a 30-60-90 right triangle with a hypotenuse that measures 1 unit. Then the short leg is one-half of the hypotenuse and using the Pythagorean Theorem you can calculate for yourself that the long leg is . Since and you chose the hypotenuse to have a measure of 1 unit, . John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Trigonometry-basics/752023: For a standard-position angle determined by the point(3, -4), what are the values of the six trigonometric functions?1 solutions Answer 457512 by solver91311(17077)   on 2013-05-23 17:30:33 (Show Source): You can put this solution on YOUR website! For a point at (3,-4), the distance from the origin is 5 (because 3, 4, 5 is a Pythagorean Triple). The distance from the origin is the hypotenuse of your right triangle, so the sine is -4/5, the cosine is 3/5, the tangent is the sine divided by the cosine, the cotangent is the reciprocal of the tangent, the secant is the reciprocal of the cosine, and the cosecant is the reciprocal of the sine. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Trigonometry-basics/752007: how to solve in the triangle below, sin F=1/5,sin=2/5, and side f=24. find the length of side d.1 solutions Answer 457511 by solver91311(17077)   on 2013-05-23 17:26:06 (Show Source): You can put this solution on YOUR website! "The triangle below" ? Below what? What triangle? Are you new? John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 percentage/751994: 45 115 what is the value of x 1 solutions Answer 457510 by solver91311(17077)   on 2013-05-23 17:18:51 (Show Source): You can put this solution on YOUR website! You're kidding, right? John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Linear_Algebra/751664: How do I solve the equation of (x-y)2n+1=?1 solutions Answer 457342 by solver91311(17077)   on 2013-05-22 17:14:14 (Show Source): You can put this solution on YOUR website! There is no "solution" for your equation. I very much doubt that your instructor or your textbook asked you to solve the equation. You only have one equation, and, counting the question mark, you have 4 variables. Now it is possible to show the binomial expansion of your expression, presuming that the 2n + 1 part is an exponent (in which case you should have rendered the expression as (x - y)^(2n + 1) = ?). But that is not what you asked and I'm not going to do all of that work on a guess. Write back when you figure out what it is that you really want. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Probability-and-statistics/751660: 4. A crowd contains 1000 people. 480 males and 520 females. Find the likelihood someone chosen at random is Female. 5. Using the information from #4, find the probability that two people chosen at random without replacement are both females. 6. Using the information from #4, four people are chosen with replacement. Find the probability that they are chosen by gender EXACTLY in order as FFMM. 7. Using the information from #4, find the probability that two people are chosen without replacement that have the same gender. 1 solutions Answer 457341 by solver91311(17077)   on 2013-05-22 17:08:44 (Show Source): You can put this solution on YOUR website! 4. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Systems-of-equations/751661: solve the system: x+y=8, x+y=7 how do you solve this?1 solutions Answer 457340 by solver91311(17077)   on 2013-05-22 17:06:20 (Show Source): You can put this solution on YOUR website! Please be more specific about what is giving you difficulty. Is it systems of linear equations in general or the fact that this particular system defies your attempts to solve it? Please show the work that you have done so far. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Matrices-and-determiminant/751636: Calculate the area of the triangle with the following vertices: 5. (0,-9), (3,-9), and (0,-2) 6. (-8, -2), (-1, -11), and (-1, -2) 7. (-5, 1), (2, 9), and (-5, 9) 1 solutions Answer 457339 by solver91311(17077)   on 2013-05-22 17:03:42 (Show Source): You can put this solution on YOUR website! In each case, you have two equal x coordinates and two equal y coordinates, therefore, two of the sides are perpendicular. In each case, plot the points, draw your triangle, determine the length of the two perpendicular legs, multiply and then divide by 2, just like finding the area of any other right triangle. Since the perpendicular legs are parallel to the axes, determining the length is a simple matter of subtracting coordinates and then taking the absolute value. For example, the measure of the segment that joins (0, -9) and (3, -9) is |0 - 3| = 3. You can figure the rest for yourself. By the way, please read the instruction that says "One question per post." Then re-read it. Repeat until understanding is complete. Thank you. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Quadratic-relations-and-conic-sections/751639: Classify the conic section of each equation. 10. 25x2 - 9y2 = 144 11. x2 + y2 = 225 12. x2 + 3y2 = 3 13. 4x2 + 3x = y2 + 2y + 7 1 solutions Answer 457337 by solver91311(17077)   on 2013-05-22 16:53:29 (Show Source): You can put this solution on YOUR website! Put the squared variables on the same side of the equation, then look at the coefficients. If there is only one squared variable, then parabola. If the coefficients are equal, then circle. If the coefficients are unequal but the same sign, then ellipse. If the coefficients are opposite signs, then hyperbola. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Probability-and-statistics/751654: Two cards are chosen at random without replacement from a deck of 52 cards containing 4 kings. Which expression could be used to find the probability of choosing two kings?1 solutions Answer 457335 by solver91311(17077)   on 2013-05-22 16:50:06 (Show Source): You can put this solution on YOUR website! For the first card drawn, there are 4 ways out of 52 to get a king, or 1/13. Then, given that a king was drawn on the first draw, you have 3 kings left in the deck, but the deck now only has 51 cards, so 3/51 = 1/17, and these are independent events, so the product of the two probabilities. I can't tell you "which" expression because YOU were too lazy to share the choices with us -- you will have to calculate which of your choices is equivalent to 1/13 times 1/17 John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Expressions-with-variables/751644: how do you solve for x : heres the question 0.35x+0.6=0.1x+11 solutions Answer 457322 by solver91311(17077)   on 2013-05-22 16:27:56 (Show Source): You can put this solution on YOUR website! Add -0.1x to both sides then add -0.6 to both sides. Multiply both sides by the reciprocal of the coefficient on x. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Word_Problems_With_Coins/751645: What are all the possible combinations of coins( using pennies, nickels, dimes and quarters) that equal 43 cents.1 solutions Answer 457320 by solver91311(17077)   on 2013-05-22 16:25:03 (Show Source): You can put this solution on YOUR website! The only way to solve this is to find a logical way to list them. Two quarters is 50 cents, so it is only possible to have either one quarter or zero quarters. Start with 1 quarter. That leaves you with 18 cents to make up. So, given that you have 1 quarter, the most dimes you can have is 1, leaving you 8 cents to make up, so you can have, at most, 1 nickel, and then 3 pennies. Now take away the nickel and add 5 pennies, so 1 Q, 1 D, 0 N, 8 P. Take away the dime, so: 1 Q, 0 D, 3 N, 3 P, or 1 Q, 0 D, 2 N, 8 P, or 1 Q, 0 D, 1 N, 13 P, or 1 Q, 0 D, 0 N, 18 P Take away the quarter, and now you can have up to 4 dimes: 0 Q, 4 D, 0 N, 3 P And so on until you get down to 0 Q, 0 D, 0 N, 43 P. You can follow the pattern and then count the possibilities for yourself. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Distributive-associative-commutative-properties/751156: I had to illustrate this problem using distributive property (a-b)(a-b)=a^-2ab+b^2 on a quiz and got the wrong answer. 1 solutions Answer 457018 by solver91311(17077)   on 2013-05-21 11:52:53 (Show Source): You can put this solution on YOUR website! Share the answer you gave and someone will show you what you did wrong. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 test/751160: Hi, my name is Brittany Foster I graduated in 2008 but I am still struggling to get my high school diploma because of the math taks I could really use some help.1 solutions Answer 457017 by solver91311(17077)   on 2013-05-21 11:51:46 (Show Source): You can put this solution on YOUR website! Then why don't you simply follow the instructions and post a question? Here are the instructions for posting, just in case you missed them while they were right in front of you while you were typing your little bit of drama. * Ask your question clearly and fully so that it MAKES SENSE. We are not mind readers. We do not have your textbook in front of us. All we know is what you wrote. * Do not use slang or strange abbreviations. Spell every word as well as you can. This improves your chances that your question will be answered. * Show what you have tried. * Proofread your submission BEFORE you hit the "Submit" button. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 test/751164: x-1=1/4(y-8)^2 Which conic section is this ? Hyperbola Circle Parabola Ellipse 1 solutions Answer 457016 by solver91311(17077)   on 2013-05-21 11:48:02 (Show Source): You can put this solution on YOUR website! Only one of the variables is squared, so it must be a parabola. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Numeric_Fractions/751161: What is a numeric fraction and a rational expression? what do they have in common and what is different about them? 1 solutions Answer 457015 by solver91311(17077)   on 2013-05-21 11:47:05 (Show Source): You can put this solution on YOUR website! Numeric fractions are one number divided by another. Rational expressions are one mathematical expression divided by another, and said mathematical expressions may or may not contain variables. Since numbers are, in and of themselves, mathematical expressions, all numeric fractions, given that the numbers are rational themselves, are rational expressions. Hence the term numeric fractions is redundant. By the way, the term "rational" has nothing whatever to do with sanity. A rationial number is one that can be expressed as the ratio of two integers. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 logarithm/751134: Plz help solve for x if 2^(x+1) - 6^x = 2^(x-1), 3^x + 3^-x = 4 & dis 1 plz 2logbase3 (x+2)=2+logbase3 x?1 solutions Answer 457013 by solver91311(17077)   on 2013-05-21 11:38:34 (Show Source): You can put this solution on YOUR website! Take the log of both sides, any base... Which is the exact answer. Use your calculator for a numerica approximation. If you don't care about the numeric approximation, you can use base 3 logs so that your denominator becomes 1. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Linear-equations/750713: I need help with a sitprob that my teacher gave me. This'll be worth a good 20% of my term, being the 3rd term, it'll be worth 12%~ of my entire year. Please make sure you know what you're doing :) I took a picture of it, wondering if anybody could help and give me steps. http://www1.picturepush.com/photo/a/13114909/img/13114909.jpg I already did the boys, not sure if it was done correctly or not though. I used the regression line method and seperated the boys into two equal groups (removed the last set of coords/results because they were uneven). The girls part, if I didn't already mess up the boys, is where I'm having trouble. Please help me find the function/equation of the graph below. Thankyou :)1 solutions Answer 456754 by solver91311(17077)   on 2013-05-20 10:20:52 (Show Source): You can put this solution on YOUR website! You have a complex and time-consuming problem here, time being valuable to us and getting this problem worked apparently being valuable to you. Write back and perhaps we can determine a mutually agreeable value. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Probability-and-statistics/750719: A machinist drilled a conical hole into a cube if metal if the cube has sides of length 5cm what is the volume of the cube after the hole is drilled round your answer to the nearest hundredth Use 3.14 for pi1 solutions Answer 456753 by solver91311(17077)   on 2013-05-20 10:14:05 (Show Source): You can put this solution on YOUR website! Calculate the volume of the original cube by raising the measure of one edge to the third power. Then calculate the volume of the conical hole, which I cannot help you with because you didn't bother to give any dimensions for the hole or describe whether it only went part way through the cube and is thus an entire cone or whether the hole went all the way through so that it is a frustum. Once you have the volume of the hole, subtract that from the volume of the cube. Next time you post a problem here READ the instructions, and continue to read them until you get it. Especally the instruction that says "Ask your question clearly and fully so that it MAKES SENSE. We are not mind readers. We do not have your textbook in front of us. All we know is what you wrote." Please do not write back to me for this problem as I may not have time to get to you today. Re-post the problem with ALL of the information. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Permutations/750715: In how many ways can the word "HOSPITAL" be arranged?1 solutions Answer 456752 by solver91311(17077)   on 2013-05-20 10:06:36 (Show Source): You can put this solution on YOUR website! 8 ways to pick the first letter times 7 ways to pick the second letter times 6 ways to pick the 3rd letter and so on... 8! altogether. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Miscellaneous_Word_Problems/750717: solution of the sale price of an article including the sales tax is Rs 1232. the rate of sales tax is 10%.of the shopkeeper has made a profit of 12%, then the cost price of the article is Rs?1 solutions Answer 456751 by solver91311(17077)   on 2013-05-20 10:04:54 (Show Source): You can put this solution on YOUR website! Divide the price including tax by 1.1 to get the pre-tax price. Then divide the pre-tax price by 1.2 to get the cost. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it
 Surface-area/749269: One cylinder with a diameter of 1 foot and a height of 2.75ft. Solve for total surface area. I estimated to be 15.75ft. but i'm sure it's wrong.1 solutions Answer 455891 by solver91311(17077)   on 2013-05-15 21:08:07 (Show Source): You can put this solution on YOUR website! Whether or not the number is correct, the answer you gave is indeed wrong because area is measured in square feet. Secondly, the total area is the area of the two bases plus the circumference of one of the bases times the height. If the diameter of the base is 1, then the radius is 1/2 and the area of one base is ( remember, you will need two of these), then the circumference of the base is 1 times , so the area of the side surface is 2.75 times . Add up the three pieces and leave the answer in terms of unless your instructor gave you a specific value to use for , in which case use that value for but since the least precise measurment given is the diameter of the base and that precision is to the nearest whole foot, you need to round your answer to the nearest whole square foot. John Egw to Beta kai to Sigma My calculator said it, I believe it, that settles it