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 Question 117911: The sum of a number and -7 is -12. solve and check Click here to see answer by MathLover1(6638)

 Question 117840: How do you write f(x)=(2x+1)^2 in standard form Click here to see answer by misscrt(37)

 Question 117952: solve and check x-1=4 Thanks and happy holidays Click here to see answer by jim_thompson5910(28598)

 Question 117964: how would you graph the quadratic equation and graph it as a parabala? I can graph I know the -3 is the y intercept, but I am not quite sure how to do this one. Could I factor to get my points? Click here to see answer by stanbon(57387)

 Question 117245: I'm not exactly sure what section this is either. I'm realy sorry! But, if you don't mind, can you please help me with this one too? f(x)= {-1 for 0< or equal to x<1 {-3 for 1< or equal to x<2 {-5 for 2< or equal to x<3 and so on...Graph f(x) for 0 Click here to see answer by Edwin McCravy(8909)

 Question 117346: I have a maths c/w on Pythagorean triples (gcse level) and we are using the quadratic formula: . a + d (n-1) + 0.5 c (n-1) (n-2) . for the sequence of Pythagorean triples multiplied by 4. where: . a = first term d = first difference c = second difference . length of middle side: 16, 48, 96, 160, 240 . I have done so far: . a = 16 d = 32 c = 16 . substitute: . 16 + 32 (n-1) + 0.5 * 16 ( n-1) (n-2) . giving me: . . simplified: . . BUT when i am checking it against the third term (96) the 16 at the end of the equation is left as extra and the answer I seem to get is 112 (an extra plus 16) . please help me urgently Click here to see answer by bucky(2189)

 Question 118217: Hello, I am having problems understanding the steps used to solve equations using the quadratic formula. Can you please show me detailed steps to understand how to solve this problem. All help is greatly appreciated, thank you. My directions say to use the quadratic formula to solve. 3x^2 – 2x = 15x – 10 Thank you Patti Click here to see answer by jim_thompson5910(28598)
 Question 118217: Hello, I am having problems understanding the steps used to solve equations using the quadratic formula. Can you please show me detailed steps to understand how to solve this problem. All help is greatly appreciated, thank you. My directions say to use the quadratic formula to solve. 3x^2 – 2x = 15x – 10 Thank you Patti Click here to see answer by ankor@dixie-net.com(15660)

 Question 118218: Hi, I am having some problems understanding the steps using quadratic formula. Can you please show me in detailed steps how to solve this problem. x^2 – 3x – 23 = 5 My directions say to solve using the quadratic formula. Thank you Patti Click here to see answer by jim_thompson5910(28598)

 Question 118222: Can you please explain this to me? Solve using the quadratic formula 3x^2 - 2x = 15x - 10 thank you julie Click here to see answer by jim_thompson5910(28598)

 Question 118246: 1- Find the roots- 1/x+4 - 1/x-7= 11/30, x is not equal to -4,7. 2- Sum of the areas of two squares is 468m2. If the difference of their perimeters is 24m, find the sides of the two squares. 3-The sum of the reciprocals of Rehman's ages(in years) 3 years ago and 5 years from now is 1/3. Find his present age. Click here to see answer by stanbon(57387)

 Question 118245: a> Is it possible to design a rectangular mango grove whose length is twice its breadth, and the area is 800 m2? If so, find its lenght and breadth. b> The sum of the ages of two friends is 20 years. Four years ago, the product of their ages in years was 48. Determine their present ages. c> Is it possible to design a rectangular park of perimeter 80 m and 400 m2? If so, find its lenght and breadth. Click here to see answer by ankor@dixie-net.com(15660)

 Question 118286: jessie kicked a soccer ball into the air with an initial upward velocity of 40 feet per second. The hieght (h) in feet of the ball above the ground can be modeled by h=-16t2+40t,where t is the time in seconds after jessie kicked the ball. find the time it takes the ball to reach 25 feet above the grond. Click here to see answer by jim_thompson5910(28598)

 Question 118354: Identify the axis of symmetry, create a suitable table of values, and sketch the graph for the following table. y=x^2-5x+3 I have the axis of symmetry of x=5/2 I know how to graph this equation. I need help with creating a suitable table of values. I am confused with this. Please help. Click here to see answer by Earlsdon(6287)
 Question 118354: Identify the axis of symmetry, create a suitable table of values, and sketch the graph for the following table. y=x^2-5x+3 I have the axis of symmetry of x=5/2 I know how to graph this equation. I need help with creating a suitable table of values. I am confused with this. Please help. Click here to see answer by scott8148(6628)

 Question 118363: Determine the quadratic function which has maximum point (-1,8 ) and x-intercept 3.Express the function in transformational form. Click here to see answer by stanbon(57387)

 Question 118365: A fountain in the town square sprays water in a parabolic arc. The water spray starts at 1/2 metre above the ground and reaches a maximum height of 5 metres after 3 seconds. Determine the quadratic function that models the path followed by the water in the fountain and use it to determime the height of the water at 1&3/4 seconds . Round your answer to the nearest tenth of a metre . Click here to see answer by stanbon(57387)
 Question 118365: A fountain in the town square sprays water in a parabolic arc. The water spray starts at 1/2 metre above the ground and reaches a maximum height of 5 metres after 3 seconds. Determine the quadratic function that models the path followed by the water in the fountain and use it to determime the height of the water at 1&3/4 seconds . Round your answer to the nearest tenth of a metre . Click here to see answer by ankor@dixie-net.com(15660)
 Question 118365: A fountain in the town square sprays water in a parabolic arc. The water spray starts at 1/2 metre above the ground and reaches a maximum height of 5 metres after 3 seconds. Determine the quadratic function that models the path followed by the water in the fountain and use it to determime the height of the water at 1&3/4 seconds . Round your answer to the nearest tenth of a metre . Click here to see answer by bucky(2189)

 Question 118374: can you help me with this problem i am stuck in the middle of it. 5x^2 + 5x +1 =0 thank you julie Click here to see answer by checkley71(8403)

 Question 118375: can you help me with this problem please. x^2 + 12x + 36 = 0 thank you julie and have a happy new year Click here to see answer by stanbon(57387)

 Question 118391: Fab Jeans presently sells ladies' jeans at an average price of \$50 a pair,with sales averaging 300 pairs daily. From an analysis of the market, it is estimated that with every \$1.50 decrease in the cost of a pair of jeans, daily sales will increase by 25 pairs. What price should Fab Jeans change to maximize their daily revenue ? What is the maximum revenue ? If it costs Fab Jeans \$12 to make each pair of ladies jeans, what price should the company charge in order to make the greatest profit ? Click here to see answer by stanbon(57387)

 Question 118401: Please assist me with this question. Iam taking beginning algebra online and the book does not give a example of hoe to answer word problems. If an object is given an initial velocity of v0 feet per second from a height of S0 feet, then its height S after t seconds is given by the formula . A rock is thrown into the air at 26 feet per second from a height of 13 feet. How long does it take to reach the earth? Click here to see answer by stanbon(57387)

 Question 118400: Please help me solve this problem. I have no idea how to arrange word problems . The length of a rectangle is 3 cm more than 2 times its width. If the area of the rectangle is 93 cm2, find the dimensions of the rectangle to the nearest thousandth. Place your answers in the blanks provided. Width = __________cm, Length = _________cm. Click here to see answer by stanbon(57387)
 Question 118400: Please help me solve this problem. I have no idea how to arrange word problems . The length of a rectangle is 3 cm more than 2 times its width. If the area of the rectangle is 93 cm2, find the dimensions of the rectangle to the nearest thousandth. Place your answers in the blanks provided. Width = __________cm, Length = _________cm. Click here to see answer by MathLover1(6638)

 Question 118393: What is the equation of the line passing through the point (6,-3) and perpendicular to the line containing the points (2,-4) and (-5,1) ? Click here to see answer by tutorcecilia(2152)

 Question 118395: What is the exact value of cos210degrees sin^2 60degrees/cos(-135degrees) Click here to see answer by stanbon(57387)

 Question 118442: Algebraically determine the exact roots of each equation. a) sqrt7x-2/sqrt2x = sqrt2x/sqrt7x+2 I got 7x^2-4=2x 7x^2-4-2x^2=0 5x^2-4=0 x=sqrt4/5 My teacher marked it wrong . b)4/x+1 - x+3/x-2 = -5 I got x= -5+or- 311i/8 Also marked wrong. Click here to see answer by stanbon(57387)

 Question 118446: It takes a local train 30 minutes longer than the express to travel 216km.The local averages 6km/h less than the express.What is a possible equation which could be used to determine the speed of each train? I said 216/x-6 - 216/x = 30 but I was marked wrong :( Click here to see answer by ankor@dixie-net.com(15660)

 Question 118447: Find three consecutive integers such that the product of the first and second is 36 less than the product of the second and third. I tried x x+1 x+2 but did not get any further :( Click here to see answer by ankor@dixie-net.com(15660)

 Question 118450: Hello, I need some help on finding the value of c that makes each trinomial a perfect square. The problem is; [n^2+14n+c] I have tried the formula: [(a+b)^2=a^2+2ab+b^2] But I seem to be getting stuck trying to find the value of [b] May someone show me how to work out the problem? Thank you :] Click here to see answer by jim_thompson5910(28598)

 Question 117153: I have to simplify each expression. # 11 is: (2+3i)(8-5i). And # 14 is: Physics For a model rocket, the altitude h, in meters, as a function of time t, in seconds, is given by h=68t-8t(squared). Find the maximum height of the rocket. How long does it take to reach the maximum height? Click here to see answer by wgunther(43)

 Question 118484: SOLVE THE EQUATION ALGEBRAICALLY. CHECK SOLUTION BY GRAPHING. #38 X^2-11=14 #42 2X^2-89=9 #43 2X^2+8=16 #44 3X^2+5=32 Click here to see answer by MathLover1(6638)