# Questions on Algebra: Quadratic Equation answered by real tutors!

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 Quadratics: solvers Practice! Answers archive Lessons Word Problems In Depth

 Question 205878: Hello, I am trying to solve quadratic word problem... A designer, attempting to arrange the characters of his artwork in the form of a square grid with equal number of rows and columns, found that 24 characters were left out. When he tried to add one more row and column, he found that he was short of 25 characters. Can you find the number of characters used by the designer? Thanks Click here to see answer by scott8148(6628)

 Question 205752: How to graph this equation: y=a(x-h)squared? Click here to see answer by RAY100(1637)

 Question 205990: I need help solving this problem, 3/8(7+2x)+3 is greater than or equal to 18 Click here to see answer by RAY100(1637)

 Question 206005: Please help me with this problem, thank you. The body mass index, I, can be used to determine an individual's risk for heart disease. An index less then 25 indicates a low risk. The body mass index is given by the formula, or model, I=700w/H2 , where w= weight, in pounds, and H=height, in inches. Tom is 71 inches tall. What weights will keep his body mass index between 19 and 33? Tom's body mass index will fall between 19 and 33 for the set of all weights such that ____< W < _______ (round to nearest tenth as needed) Click here to see answer by jim_thompson5910(28715)

 Question 206012: Please help me with this problem. I really appreciate it. Two angles are complementary. The sum of the measure of the first angle and one-fourth the second angle is 83.25 Find the measure of the smaller angle? What is the measure of the other angle? Click here to see answer by checkley77(12569)

 Question 206017: Please help me solve this equation solve by elimination method. 0.3x-0.2y=4 0.5x+0.3y=71/23 The solution is _____ (type an ordered pair) Click here to see answer by Alan3354(31518)

 Question 206030: I'm having problems doing this can you help me. Volleyball teams receive 2 points when they win and 1 point when they tie. One season a volleyball team won a championship with 57 points. the team won 12 more games than they tied. How many wins did the team have? How many ties did the team have? Click here to see answer by Alan3354(31518)

 Question 206022: Hi, Im having problems trying to solve this problem. Can you help. Hockey teams receive 2 points when they win and 1 point when they tie. One season, a team won a championship with 57 points. they won 12 more games than they tied. How many wins did the team have? How many ties did the team have? Click here to see answer by ankor@dixie-net.com(15746)

 Question 206069: Hi, Im having problems trying to solve these complex fractions. its a extraneous solution. Can you help please. ab + b^2/4ab^5 ______________ a+b/6a^2b^4 Click here to see answer by RAY100(1637)

 Question 206067: Hi, Im having problems trying to solve these rational equations. Can you help please. -3/x=x/-3 Click here to see answer by jim_thompson5910(28715)

 Question 206073: Please help me solve this equation: Find the roots by factoring. Click here to see answer by RAY100(1637)

 Question 206085: x^2-7x+11=0 the exact solutions=? the approximate solutions to 3 decimal places are? Click here to see answer by jim_thompson5910(28715)

 Question 206086: f(x)=-2x^2+2x+1 the x coordinate of the vertex is? The y coordinate of the vertex is? the equation of the line of symmetry is? the maximum/minimum of the f(x) is (simplified fraction)? Click here to see answer by nerdybill(7003)

 Question 206088: 4. Rita rows 12 km upstream and 12 km downstream in 3 hours. The speed of her boat in still water is 9 km/hr. Find the speed of the stream. Click here to see answer by anantha(86)

 Question 206082: Please help me with this problem: Write the equation of these roots. 6, -2/3 Click here to see answer by vleith(2825)

 Question 206089: solve by completing the square: 7x^2-14x+3=0 Click here to see answer by stanbon(57967)

 Question 206083: Please help me with this problem: Write the equation of these roots. -3/4,-8 Click here to see answer by stanbon(57967)

 Question 206063: Hi, Im having problems trying to solve these rational equations. Can you help. x/3 = 4/x+1 Click here to see answer by checkley77(12569)

 Question 206107: I really need some help for this problems because I have been confuse of this problems since the start and now the Examination is coming near and this is going to be added, I really will appreciate some help in this questions: ---find the value of k so that the equation will have equal roots. ---find the value of k so that the equation will have one roots numerically equal but opposite in sign --what should be the range of the value of k so that the equation will have real and unequal roots. ---what should be the value of k so that the equation will have equal roots? Click here to see answer by Edwin McCravy(8999)

 Question 206101: I really need some help for this problems because I have been confuse of this problems since the start and now the Examination is coming near and this is going to be added, I really will appreciate some help in this questions: ---find the value of k so that the equation will have equal roots. ---find the value of k so that the equation will have one roots numerically equal but opposite in sign --what should be the range of the value of k so that the equation will have real and unequal roots. ---what should be the value of k so that the equation will have equal roots? Click here to see answer by Edwin McCravy(8999)

 Question 206132: What are the inequalites that define the region in the first quadrant. How about 2nd, 3rd and 4th quadrants? Click here to see answer by Targetweek(62)

 Question 206100: 20. A punter can kick a football with an initial velocity of 48 feet per second. How many seconds will it take for the ball to return to the ground? (Hint: use the formula h= vt – 16t2.) Click here to see answer by ankor@dixie-net.com(15746)

 Question 206105: 16. If 4/3x >-1, what is the set of all possible values of x? Click here to see answer by Marth(57)

 Question 206103: 18. What is the reciprocal of 2/x + 7/x+1. Click here to see answer by Marth(57)

 Question 206153: I need to determine a quadratic equation and solve the problem. My word problems is as follows: The perimeter of a rectangle is 34cm, and the diagonal is 13cm. Determine the lengths of the sides of the rectangle. I am setting up my problem as follows but not sure if it is correct: 2x + 2y = 34 (perimeter of the rectangle) x^2 x y^2 = 13^2 or 169 (the diagonal portion of the rectangle) I am then following through to make a quadratic equation where: 2x + 2x = 37 reduces to x = 17-7 Then I am taking (17-y)^2 + y^2 = 169 to come up with my final quadratic equation. Am I on the right path? Thanks - Lori Click here to see answer by jim_thompson5910(28715)

 Question 206099: Find the value of k so that the equation will have one root equal to 3. Click here to see answer by jim_thompson5910(28715)

 Question 206189: Hi, I really need help on this one problem... I need to solve for "x" by taking the square root, and there should be two answers. I just don't understand how to do it... if you could show me, I would be deeply grateful. Click here to see answer by jim_thompson5910(28715)

 Question 206210: Can you please help me with this problem: Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling at 40 miles per hour and Train B is traveling at 48 miles per hour. Train A passes a station at 11:15PM.. If train B passes the same station at 11:30pm, at what time will train B catch up to train A? (write am, or pm in the answer) Click here to see answer by ankor@dixie-net.com(15746)

 Question 206219: 2x^2+20=-13x Click here to see answer by anantha(86)

 Question 206066: Hi, Im having problems trying to solve these rational equations. its a extraneous solution. Can you help please. 5/y-3 = y+7/2y-6 + 1 Click here to see answer by edjones(7569)

 Question 206232: 2(x-4)^7/3-(x-4)^4/3-(x-4)^1/3 Click here to see answer by stanbon(57967)

 Question 206229: Solve the formula for the indicated letter. S=4Pir^2, for r^2; P=2L + 2W, for w Click here to see answer by stanbon(57967)

 Question 206213: This problem with linear functions is getting me confused, can you help me please? I appreciate it. In 1991, the life expectancy of males in a certain country was 66.3 years. In 1995, it was 68.9 years. Let E represent the life expectancy in year t and let t represent the number of years since 1991. The linear function E(t) that fits the data is E(t)=___t + ____ (round to the nearest tenth) Use the function to predict the life expectancy of males in 2008. E(17)=___ (round to the nearest tenth) Click here to see answer by stanbon(57967)

 Question 206212: Please help, I am having problems with this one, thanks Media services charges \$40 for a phone and \$20/month for its economy plan. The equation C= 20t + 40 describes the total cost, C, of operating a media service phone for t months. the total cost for 4 months of service is \$____. If a customer has only \$90 available, how many months of service can she receive? Would it be 3, 2 1/3, 2 1/2 or 2? Click here to see answer by Theo(3504)
 Question 206212: Please help, I am having problems with this one, thanks Media services charges \$40 for a phone and \$20/month for its economy plan. The equation C= 20t + 40 describes the total cost, C, of operating a media service phone for t months. the total cost for 4 months of service is \$____. If a customer has only \$90 available, how many months of service can she receive? Would it be 3, 2 1/3, 2 1/2 or 2? Click here to see answer by nerdybill(7003)

 Question 206251: Wondering if I am on the right track. I need to determine a quadratic equation to solve the problem and also solve the problem. My word question is as follows: The perimeter of a rectangle is 34 cm and the diagonal is 13 cm. Determine the lengths of the side of the rectangle. I am setting up my equation as follows: 2x + 2y = 34 x^2 + y^2 = 169 I then determine (x) by the following equation: 2x + 2y = 34 2x = 34 - 2y x = 17 - y Then I am taking the following equation to come up with a quadratic equation: (17-y)^2 + y^2 = 169 189 - 34y + y^2 + y^2 = 169 2y^2 - 34y = -20 2y^2 - 34y + 20 = 0 Then my final answer (?) after calculating the quadratic equation is: x = 34 + or - 498 / 4 x = 133 and x = 116 My question is, am I doing this correctly or am I missing a step? Your input would be greatly appreciated. Lori Click here to see answer by Targetweek(62)
 Question 206251: Wondering if I am on the right track. I need to determine a quadratic equation to solve the problem and also solve the problem. My word question is as follows: The perimeter of a rectangle is 34 cm and the diagonal is 13 cm. Determine the lengths of the side of the rectangle. I am setting up my equation as follows: 2x + 2y = 34 x^2 + y^2 = 169 I then determine (x) by the following equation: 2x + 2y = 34 2x = 34 - 2y x = 17 - y Then I am taking the following equation to come up with a quadratic equation: (17-y)^2 + y^2 = 169 189 - 34y + y^2 + y^2 = 169 2y^2 - 34y = -20 2y^2 - 34y + 20 = 0 Then my final answer (?) after calculating the quadratic equation is: x = 34 + or - 498 / 4 x = 133 and x = 116 My question is, am I doing this correctly or am I missing a step? Your input would be greatly appreciated. Lori Click here to see answer by mickclns(59)

 Question 206280: Can you help me with this problem, The function H(x)= 2.75x +71.48 can be used to predict the height, in centimeters, of a woman whose humerus (the bone from the elbow to the shoulder) is x cm long. Predict the height of a woman whose humerus is 36cm long. the predicted height of a woman whose humerus is 36cm long is _____cm Click here to see answer by Theo(3504)
 Question 206280: Can you help me with this problem, The function H(x)= 2.75x +71.48 can be used to predict the height, in centimeters, of a woman whose humerus (the bone from the elbow to the shoulder) is x cm long. Predict the height of a woman whose humerus is 36cm long. the predicted height of a woman whose humerus is 36cm long is _____cm Click here to see answer by Targetweek(62)

 Question 206301: (2x+5)(3x-4)=0 Click here to see answer by scott8148(6628)

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