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# Recent problems solved by 'solver91311'

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 Permutations/486053: A class containing 25 students 12 of them are female in how many ways can we select a group of 6 males1 solutions Answer 332313 by solver91311(16868)   on 2011-08-25 14:24:51 (Show Source): You can put this solution on YOUR website! That would depend on whether the generally accepted assumption that any person who is not female is male (or vice versa) is actually true. Accepting this initial premise leads us to the conclusion that there are 13 males in the class, and we want to calculte 13 pick 6. is the number of combinations of things taken at a time, also expressed " pick ", and is calculated by You can do the rest of the arithmetic yourself. John My calculator said it, I believe it, that settles it
 Linear-equations/486047: find the equation of the line having the given slope, and containing the given point. m=9 (6,7) the equation of the line is y=?1 solutions Answer 332308 by solver91311(16868)   on 2011-08-25 13:59:49 (Show Source): You can put this solution on YOUR website! You cannot find the equation of a line since there are many ways to describe the set of ordered pairs that comprise any given line. You can, however, determine an equation whose solution set is a set of ordered pairs that comprise a line with the given characteristics. Use the point-slope form. where are the coordinates of the given point and is the given slope. It looks from the last line of your question that the slope-intercept form () is the desired form of the answer. So distribute the across , add to both sides, and combine . John My calculator said it, I believe it, that settles it
 Parallelograms/486006: how do you tell if opposite sides of a parallelogram are congruent in coordinate proofs?1 solutions Answer 332305 by solver91311(16868)   on 2011-08-25 12:28:57 (Show Source): You can put this solution on YOUR website! Use the Euclidian Parallel Postulate and the proof of its converse. John My calculator said it, I believe it, that settles it
 Linear-equations/486001: let (x1, y1)=(-6,-3) and (x2,y2)=(-4,5). Find y2-y1/x2-x1 and y1-y2/x1-x2 are the results the same? 1 solutions Answer 332304 by solver91311(16868)   on 2011-08-25 12:18:20 (Show Source): You can put this solution on YOUR website! Better than that, let and . Factor -1 from : Likewise: So, by substitution: . But since . But . also. Therefore: John My calculator said it, I believe it, that settles it
 Numbers_Word_Problems/485716: a number is divided by 3 then 14 is added to the quotient, the result is 33, what is the number?1 solutions Answer 332149 by solver91311(16868)   on 2011-08-24 19:15:35 (Show Source): You can put this solution on YOUR website! Solve for . John My calculator said it, I believe it, that settles it
 Triangles/485705: One side of an equilateral triangle is 6 cm. Whats the measure of an altitude of the triangle?1 solutions Answer 332148 by solver91311(16868)   on 2011-08-24 19:13:33 (Show Source): You can put this solution on YOUR website! If you draw an altitude in an equilateral triangle, you create a 30-60-90 triangle, the sides of which are in proportion: where is the measure of the hypotenuse of the 30-60-90 triangle, and therefore the measure of the side of the equilateral triangle. John My calculator said it, I believe it, that settles it
 Numbers_Word_Problems/485700: my number is in the tens place it's 8 more than the ones place, it does not contain a zero. what is my number 1 solutions Answer 332141 by solver91311(16868)   on 2011-08-24 19:01:28 (Show Source): You can put this solution on YOUR website! The only two pairs of single digits with a difference of 8 are 9 and 1 and 8 and 0, but the problem said no zero. John My calculator said it, I believe it, that settles it
 Equations/485699: Pn = r + si/f f=? 1 solutions Answer 332140 by solver91311(16868)   on 2011-08-24 18:58:15 (Show Source): You can put this solution on YOUR website! Add -r to both sides. Multiply by Take the reciprocal of both sides. John My calculator said it, I believe it, that settles it
 Numeric_Fractions/485698: What is 1/2 divided by 1/41 solutions Answer 332139 by solver91311(16868)   on 2011-08-24 18:55:47 (Show Source): You can put this solution on YOUR website! In order to divide fractions, invert the divisor and then multiply. John My calculator said it, I believe it, that settles it
 Numbers_Word_Problems/485693: In a 4 digit number, the last two digits are 7. The sum of the hundreds and thousands digits is 20. What are two possible answer choices?1 solutions Answer 332138 by solver91311(16868)   on 2011-08-24 18:54:59 (Show Source): You can put this solution on YOUR website! Not possible. The largest single digit number is 9, hence the sum of the hundreds and the thousands digit cannot be larger than 9 + 9 = 18. John My calculator said it, I believe it, that settles it
 Linear-equations/485683: I need help with how to find missing coordinates! Find the value of k (-3,2k)(k,6) m=41 solutions Answer 332132 by solver91311(16868)   on 2011-08-24 18:33:50 (Show Source): You can put this solution on YOUR website! Use the slope formula: where and are the coordinates of the given points. Substitute the data that you are given. Presume the first listed ordered pair is point 1. Solve for . John My calculator said it, I believe it, that settles it
 Conjunction/485670: please please help me, i have posted this problem several times and no one will respond. if the argument is valid, name which of the four valid forms of argument is represented. if it is not valid, name the fallacy that is represented. if i sing in the shower, then i will not be overheard while singing. i was overheard while singing therefore i did not sing in the shower. 1 solutions Answer 332126 by solver91311(16868)   on 2011-08-24 18:21:32 (Show Source): You can put this solution on YOUR website! The argument is valid because the contrapositive of a conditional proposition always has the same truth value as the original proposition: John My calculator said it, I believe it, that settles it
 Numbers_Word_Problems/485666: If a number is added to itself, the sum is greater than the original number?1 solutions Answer 332124 by solver91311(16868)   on 2011-08-24 18:15:34 (Show Source): You can put this solution on YOUR website! That certainly depends on what you mean by "a number." As posed, the answer to your question is "Sometimes" Select a natural number and add it to itself, then the sum is certainly greater than the original. Select zero and add it to itself. You get zero, so the sum is the same as the original number. Select a negative number and add it to itself, then the sum is smaller than the original number. John My calculator said it, I believe it, that settles it
 Numbers_Word_Problems/485658: Can the sum of two three-digit numbers egual a four-digit number?1 solutions Answer 332122 by solver91311(16868)   on 2011-08-24 18:11:05 (Show Source): You can put this solution on YOUR website! How many digits in the sum of two numbers each of which is greater than or equal to 500 but less than 1000? John My calculator said it, I believe it, that settles it
 Volume/485566: Suppose that a box has a volume of 100 centimeters and that the areaof the bottom of the box is 50 square centimeters. Find the height of the box.1 solutions Answer 332121 by solver91311(16868)   on 2011-08-24 18:05:40 (Show Source): You can put this solution on YOUR website! Volume is length times width times height. Area is length times width. Substitute for in the Volume equation: Solve for John My calculator said it, I believe it, that settles it
 Triangles/485614: In a certain isosceles triangle, the base is seven less than twice the measure of one of the legs. The perimeter is 65 cm. Find the lengths of all three sides of the triangle.1 solutions Answer 332108 by solver91311(16868)   on 2011-08-24 17:36:39 (Show Source): You can put this solution on YOUR website! Let represent the measure of one of the legs. Then, since this is an isosceles triangle, the other leg must also measure . We are also given that the base is . Finally, since we know that the perimeter of any polygon is the sum of the measures of all of the sides, we can write: Solve for . Then calculate . John My calculator said it, I believe it, that settles it