Math at eNotes
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The latest questions and answers, from members following Math at eNotes.Mon, 22 Sep 2014 03:40:25 PSTen-usWe know that a parabola is the graph for the quadratic function. As...
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We know that a parabola is the graph for the quadratic function. As such, it has the general equation f(x)= y = ax^2 + bx + c The y-intercept occurs when the value of x is 0. Therefore, at the y-intercept, y = c but we know that the y-intercept is (0,3) and therefore y = 3 the equation of the parabola now becomes y = ax^2 +bx+3 plugging in for the two points given (i.e. (-2,15) and (4,3)) then we get two equations that can be solved...http://www.enotes.com/homework-help/parabola-has-y-intercept-3-passes-through-points-471136Mon, 22 Sep 2014 03:40:25 PSTHey The method that the home work instructs you to use is counting...
http://www.enotes.com/homework-help/need-find-area-b-c-d-e-f-g-471078
Hey The method that the home work instructs you to use is counting squares. It's pretty simple to do. Let's look at (a) first. - First count all of the full squares enclosed in the shaped. That gives you 15 square units. - Now let's count the squares that are not completely enclosed in the shape and sort of merge them with other not fully enclosed squares to give us a full square. for example, starting from the top left, the first and...http://www.enotes.com/homework-help/need-find-area-b-c-d-e-f-g-471078Mon, 22 Sep 2014 03:18:17 PST4x - 2y = 8, I am going to try to get x alone first: subtract 4x -2y = 8...
http://www.enotes.com/homework-help/solve-equations-4x-2y-8-2x-y-3-470610
4x - 2y = 8, I am going to try to get x alone first: subtract 4x -2y = 8 - 4x divide by -2: y = -4 + 2x now plug in this solution as Y in order to solve for x 2x - y = 3 2x - (-4+2x) = 3 2x + 4 - 2x = 3 move like terms to the same side: 2x - 2x = 3-4 0=-1 this problem does not have solutions, you can tell because 0 does not equal 1, there is nothing you can multiply 0 by in order to get 1 . http://www.enotes.com/homework-help/solve-equations-4x-2y-8-2x-y-3-470610Sun, 21 Sep 2014 01:46:18 PST1 variable: x+5 = 17 2 variables: 3x + 2y = 8y - x variables, radicals...
http://www.enotes.com/homework-help/based-your-understanding-text-develop-three-471158
1 variable: x+5 = 17 2 variables: 3x + 2y = 8y - x variables, radicals and exponents: `sqrt(x)` = `y^(2)`http://www.enotes.com/homework-help/based-your-understanding-text-develop-three-471158Sun, 21 Sep 2014 01:20:53 PSTBased on your understanding of the text, develop three algebraic...
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Based on your understanding of the text, develop three algebraic equations incorporating any combination of variables, radicals, and exponents. For your initial post, post your three equations without the solutions. Basically give me three examples of any of combinations of: variables,radicals and exponents. I need answered by 11:00 pm EST Thanks for any help you can providehttp://www.enotes.com/homework-help/based-your-understanding-text-develop-three-471158#1September 21, 2014, 12:34 am PSTThe area of a triangle can be found by using (1/2)bh where b=base and...
http://www.enotes.com/homework-help/what-area-triangle-with-sides-6-8-10-cm-470643
The area of a triangle can be found by using (1/2)bh where b=base and h=height if the sides are 6, 8 and 10, try using the Pythagorean Theorem to see if the triangle is a right triangle, you can tell it is so because when you square 6 and 8 their sum would be the square of 10, so 6 and 8 are the legs: you use those numbers: (1/2)x6x8 = 24 so 24cm^2http://www.enotes.com/homework-help/what-area-triangle-with-sides-6-8-10-cm-470643Sat, 20 Sep 2014 17:48:29 PST(x+2y+8z) - (6z-2y-x) I know the problem seems difficult but trust me...
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(x+2y+8z) - (6z-2y-x) I know the problem seems difficult but trust me it isnt as scary are it looks. The first step is to distribute the - in front of the parentheses to the numbers inside: (this will flip the sign of all the numbers) - (6z-2y-x) -6z + 2y +x now plug this back in: x + 2y + 8z - 6z + 2y + x now to make this easier you can move the terms that are alike next to each other, kind of like how 8z and -6z are already next to each...http://www.enotes.com/homework-help/x-2y-8z-6z-2y-x-can-someone-explain-470693Sat, 20 Sep 2014 17:23:29 PST 2x +y =2 y = 2 - 2x now plug in this solution as y into the other...
http://www.enotes.com/homework-help/solve-algebraically-2x-y-2-3x-2y-5-470726
2x +y =2 y = 2 - 2x now plug in this solution as y into the other problem: 3x + 2(2-2x)=5 take care of the parentheses by distributing the 2 to the numbers inside of the parentheses: 3x + 4 - 4x = 5 move like terms to the same side: 3x - 4x = 5 - 4 combine like terms: -x = 1 x = -1 now plug in x into any one of the equations to get y: 2(-1) +y =2 -2 + y = 2 move like terms: y = 2 + 2 y = 4 so (-1, 4)http://www.enotes.com/homework-help/solve-algebraically-2x-y-2-3x-2y-5-470726Sat, 20 Sep 2014 17:08:44 PST`(5x)/(x-2) -7=10/(x-2) ` multiply both sides by x-2 this will cancel...
http://www.enotes.com/homework-help/solve-x-5x-x-2-7-10-x-2-470756
`(5x)/(x-2) -7=10/(x-2) ` multiply both sides by x-2 this will cancel out the x-2 denominators: `(x-2)((5x)/(x-2)) -7=(x-2)(10/(x-2))` the problem will become: 5x - 7x + 14 = 10 move like terms to the same side: 5x - 7x = 10 - 14 -2x = -4 divide by -2: x = 2http://www.enotes.com/homework-help/solve-x-5x-x-2-7-10-x-2-470756Sat, 20 Sep 2014 17:00:57 PST2. (13 - 5(3 -7)^2) You use pemdas for a problem like this. Pemdas...
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2. (13 - 5(3 -7)^2) You use pemdas for a problem like this. Pemdas stands for Parentheses,Exponents,(Multiplication,Division),(Addition,Subtraction) Take care of the parentheses: 5(3 - 7)^2 5(-4)^2 Exponent: (13 -5(16)) Multiplication -5(16): (13-80) Subtraction: -67 http://www.enotes.com/homework-help/1-6-10-2-13-5-3-7-2-470860Sat, 20 Sep 2014 16:45:21 PST1. |-6 - 10| Those lines around the problem are absolute value lines....
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1. |-6 - 10| Those lines around the problem are absolute value lines. This line indicates that when you get an answer, the result should be turned into a positive number. Why? Because absolute value means how far from zero a number is, and you can't be a negative away from zero. -10 is 10 spaces away from 0 just like 10 is 10 spaces away from 0 first you solve the number inside: -6 - 10 = -16 since it is l-16l the answer will be...http://www.enotes.com/homework-help/1-6-10-2-3-4-8-3-5-20-41-3-6-1-8-3-8-4-13-5-3-7-2-470862Sat, 20 Sep 2014 16:43:44 PSTThe easiest way to solve 59x2 would be by thinking of it like an...
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The easiest way to solve 59x2 would be by thinking of it like an addition problem. 59x2 is the same as adding 59 + 59 Now you can solve it like that and get 118, or if you want an easier way break down 59 into two easy numbers to add 50 and 9 So instead of doing 59 + 59 which may be hard for others all you have to do it add 50 twice and 9 twice then add the result: 50 + 50 = ? 9 + 9 = ! ? + ! = answer breaking it down this way will help you...http://www.enotes.com/homework-help/what-59x2-471049Sat, 20 Sep 2014 16:04:09 PSTA parabola is a graph of a quadratic function. The equation of a...
http://www.enotes.com/homework-help/parabola-has-y-intercept-3-passes-through-points-471136
A parabola is a graph of a quadratic function. The equation of a quadratic function in standard form is `y = ax^2 + bx + c` The vertex of the parabola can be determined from this equation, so first we have to find a, b, and c, in order to write the equation of the given parabola. The y-intercept of a parabola, or any graph, is the point where the graph intersects y-axis. At this point x = 0. So, for a quadratic function, y-intercept is always...http://www.enotes.com/homework-help/parabola-has-y-intercept-3-passes-through-points-471136#2Thu, 18 Sep 2014 23:17:15 PSTA parabola has a y-intercept of 3 and passes through the points (-2,15)...
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A parabola has a y-intercept of 3 and passes through the points (-2,15) and (4,3). What are the coordinates of the vertex?http://www.enotes.com/homework-help/parabola-has-y-intercept-3-passes-through-points-471136#3September 18, 2014, 10:43 pm PSTSuppose that students arrive at a lecturer’s office according to a...
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Suppose that students arrive at a lecturer’s office according to a Poisson process with rate ¡, and each conversation between a lecturer and a student is exponentially distributed with rate t. After each conversation is finished, there is a probability p that the student’s problem is solved and he or she consequently leaves. With probability 1-p, however, the student suddenly remembers another question, and re-joins the queue immediately...http://www.enotes.com/homework-help/suppose-that-students-arrive-lecturers-office-471130September 18, 2014, 6:14 pm PST