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 Question 157874: one person proofreads a copy for a small newspaper in 4 hours. If a second proofreader is also emplyoed, the job can be done in 2.5 hours. how long does it take for the 2nd proofreader to do the job alone. Click here to see answer by vleith(2825)

 Question 157876: I've been working on an assignment and I'm stumped. I have to solve quadratic equations with the following steps: a) Move the constant term to the right side of the equation. b) Multiply each term in the equation by four times the coefficient of the x2 term. c) Square the coefficient of the original x term and add it to both sides of the equation. d) Take the square root of both sides. 3) Set the left side of the equation equal to the positive square root of the number on the right side and solve for x. f) Set the left side of the equation equal to the negative square root of thenumber on the right side of the euqation and solve for x. I have two equations I'm stuck on: 1) x2 - 2x - 13 = 0 2) 2x2 - 3x - 5 = 0 Click here to see answer by MathLover1(6634)

 Question 157758: Two television monitors sitting beside each other on a shelf in an appliance store have the same screen height. One has a conventional screen, which is 3 inches wider than it is high. The other has a wider, high-definition screen, which is 1.8 times as wide as it is high. The diagonal measure of the wider screen is 15 inches more than the diagonal measure of the smaller. What is the height of the screens, correct to the nearest 0.1 inch? I tried the Pythagorean theorem & got 2w^2+6w+24=d^2 and got stuck. Click here to see answer by Fombitz(13828)

 Question 157892: If your test scores are 80 and 100, then the arithmetic mean of you scores is 90. The geometric mean of the scores is a number h such that 80/h=h/100 Are you better off with the arithmetic mean or the geometric mean? Click here to see answer by Fombitz(13828)

 Question 157988: Find the vertex for the graph of the quadratic function. f(x) = x^2 – 11 Click here to see answer by checkley77(12569)

 Question 157979: 1 Solve by completing the square X^2 + 10x +13 = 0 2. Solve using the quadratic formula X^2 - 2x = 5x-2 3. Solve using quadratic formula x^2 - 3x - 3 = -5 Click here to see answer by jim_thompson5910(28595)

 Question 158127: I need some help on one of my math questions, I've included a picture of the diagram below Consider the following open-top box layout with cuts (solid lines) and folds (dotted lines as indicated. The box is made by cutting out the corners but leaving sufficient material as flaps for gluing or tucking in. http://picasaweb.google.com/swede5670/Math#5248354434228399282 Express the volume V of the resulting box as a function of the length of the corner cutout, X Click here to see answer by nerdybill(6962)

 Question 158146: The given pair of lines intersect. Find the point of intersection. Graph the lines. 35. L: x – y = -2 Click here to see answer by Alan3354(30993)

 Question 158229: Graph the linear inequality x+5y is equal to or greater than -1 Thanks for you help Click here to see answer by gonzo(654)

 Question 158275: The width of a rectangle is 4 less than twice its length. If the area of the rectangle is 24 cm, what is the length of the diagonal? Click here to see answer by Ms.Smith(3)

 Question 158223: Can someone help me Please? I can't seem to figure this one out. S=1/3nr^2h+4nrh solve for r Any help would be so great. Thank you. Click here to see answer by scott8148(6628)

 Question 158508: Please help with my home work 1. solve by factoring x^2-10x = -16 2. Solve using the square root property 5x^2 -1 =74 3. Solve using the square root property (x + 6)^2 = 121 Click here to see answer by checkley77(12569)

 Question 158644: The problem I am trying to figure out is: (a-2)^2=8 I have to use the square root property. I have no idea what I am doing wrong but this is what I have so far.sqrt[(a-2)^2]= +or-sqrt[8] =a-2=+or-2 ==a-2+2=3+or-2 a=3+or-2 a=3+2 a=5 or a=3-2 a=1 Could you please tell me I have done wrong. And could you show the steps and explain this to me. I just don't understand. Thank you. Click here to see answer by Alan3354(30993)

 Question 158812: Z to the 2nd power - z = 12 Find the smaller solution of this equation. Click here to see answer by checkley77(12569)

 Question 158823: solve by quadratic formula 1/2x^2 + 1/3x - 1/6 it didn't work when i subed it in, what do i have to do to the numbers Click here to see answer by checkley77(12569)

 Question 159089: A farmer with 10,000 meters of fencing wants to enclose a rectangular field and then divide it into three plots with two fences parallel to one of the sides. What is the area that can be enclosed? I need to find the vertex but cannot figure out how to solve this problem. (Analyzing Graphs of Quadratic Functions). Click here to see answer by ankor@dixie-net.com(15656)

 Question 159122: These equation has more than 2 solutions. 27x^3-8=0 Help. What do I do since it is a cube not square Click here to see answer by midwood_trail(310)

 Question 159121: x^2/3-x-1/6 -b+-sqr rt of b^2-4ac/ 2a a=? b=-1 c=-1/6 I am stuck as to what "a" is. Click here to see answer by Alan3354(30993)

 Question 159218: 2x2 = 3y2 + 5 , x - 3 + 5 = 0 Click here to see answer by KnightOwlTutor(293)

 Question 159234: y = x+7 , x2 + y2 =29 Click here to see answer by Alan3354(30993)

 Question 159246: hey, could you please solve the following problem for me, and thank you. Sammy McWire hits a massive pop-up. the height h, in meters, of the ball is given by h = 1.2+20t-5t^2, where t is in seconds. what is the maximum height of the ball? if it is caught at the same height at which it was hit. how long is it in the air? i will be waiting for the solution, and thank you again, Click here to see answer by jim_thompson5910(28595)

 Question 159293: Hi, i am having trouble finding the answer to this: The following equations have repeated roots. find the value(s) of the constant p leaving your answer(s) in exact form. (p-1)x^2 + 6x + (p+7) = 0 i have been trying to figure it out for a while now and i have looked in the text book and the answers are -8 and 2, but i want to know how i can get these answers. Thanks. Click here to see answer by jim_thompson5910(28595)

 Question 159309: I am stumped on this problem. 3x^2-x-1=0. I am needing to solve it by either quadratic equation or finding the square root. Has to be completely worked out with all steps. If anyone could help I would appreciate it. This is the last question on my assignment. Thank you, Renee Click here to see answer by jim_thompson5910(28595)

 Question 159712: I just can't seem to get this. Can you help me solve this equation? Thanks x/8 +x/12 = -4 Click here to see answer by checkley77(12569)

 Question 159818: f(x)= x^2+6x-4 is the function The questions are. a.what is the vertex of the parabola? b.what is domain and range? c.find the interval over which the function is increasing?decreasing? d.approximate the zeros of the function using the calculater? for a. i got (3,13) is that right? for b. i got domain(-inf,inf) range [13,inf) for c. increasing [13,inf) decreasinf (-inf,13] for d i dont know how to do Please help! Click here to see answer by jim_thompson5910(28595)