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

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

 Question 261839: solve x^2 - 2x - 13 = 0 Click here to see answer by checkley77(12569)

 Question 261835: 4x^2=13x+12 Click here to see answer by Stitch(352)

 Question 261941: Bayside Insurance offers two health plans. Under plan A Giselle would have to pay the first \$140 of her bills and 25% of the rest. Under plan B Giselle would pay the first \$160, but only 20% of the rest. For what amount of medical bills will plan B save Giselle money? Assume she has over \$160 in bills. Giselle would save with plan B if she had more than \$____ in bills? Please help I have been working on this for over an hour. Deborah Click here to see answer by jim_thompson5910(28595)

 Question 261964: Jim, I have tried to follow and plug in the equation but it is not working. I have been at this for over an hour and my brain is fried. Help!! Bayside Insurance offers two health plans. Under plan A Giselle would have to pay the first \$140 of her bills and 25% of the rest. Under plan B she would have to pay the first \$160 of her bills and 20% of the rest. For what amount of medical bills will plan B save Giselle money? Assume she has over \$160 in bills. Giselle would save with plan B if she had more than \$_________in bills? When it says assume she has over \$160 in bills, does that mean you can use any number higher than 160? Please help, Thank you Deborah Click here to see answer by jim_thompson5910(28595)

 Question 262144: If f(x)=(1/3)x + 3, then f-1(x) is? I got 3x-3, but I got it wrong. Click here to see answer by nerdybill(6962)
 Question 262144: If f(x)=(1/3)x + 3, then f-1(x) is? I got 3x-3, but I got it wrong. Click here to see answer by palanisamy(496)

 Question 262198: At how many points do the graphs of y = x^3 and y = x^2 + 4x intersect? Click here to see answer by richwmiller(9143)

 Question 262207: suppose that the width of a certain rectangle is 2 inches more than one fourth of its length. the perimeter is 54 inches. find the length and the width. Click here to see answer by palanisamy(496)

 Question 262205: I need help with the equation 3(4x-9)=x+100. So far I have done two steps and then i am completely lost? My first step I got 12x-27=x+100, then the second step I got 12x=x+127, now I cant figure out how do I divided the 12 with the x or the 127? Click here to see answer by Theo(3464)

 Question 262235: What are the possible number of solutions for a quadratic equation? there are a maximum of 2 solutions since the highest order exponent is 2. Click here to see answer by Alan3354(30993)
 Question 262235: What are the possible number of solutions for a quadratic equation? there are a maximum of 2 solutions since the highest order exponent is 2. Click here to see answer by Theo(3464)

 Question 262234: How would I find the points at which the parabola formed y=x^2 and the line formed by y=2x+3 intersect Click here to see answer by Alan3354(30993)

 Question 262099: I need help on how to Perform the Indicated Operation: __X___ - ____3_____ x^2-16 _x^2+5x+4 These are 2 different fractions. The first denominator is the x^2-16 and the second denominator under the 3 should be x^2+5x+4. Thank you so much for you help! If you can write it out to where I can understand how you got the conclusion, because I have more questions like this and I want to be able to do them on my own. Click here to see answer by ankor@dixie-net.com(15659)

 Question 262245: How would I find the points at which the parabola formed y=x^2 and the line formed by y=2x+3 intersect? Click here to see answer by nerdybill(6962)

 Question 262296: Here is an example of a quadratic equation can you explain to me step by step how to solve it. 5x-2y=8 Click here to see answer by drk(1908)

 Question 262300: Give exact and approximate solutions to 3 decimal places. x^2+16x+64=9 Please help me solve. Click here to see answer by drk(1908)

 Question 262317: determine the nature of the solutions of the equation x^2+4=0 Please help me solve. Click here to see answer by stanbon(57377)

 Question 262320: Find the vertex, line of symmetry, maximum or minimum value, and graph. f(x)=3x^2-24x+50 Please help me solve. Would it be 4,-2? Click here to see answer by richwmiller(9143)
 Question 262320: Find the vertex, line of symmetry, maximum or minimum value, and graph. f(x)=3x^2-24x+50 Please help me solve. Would it be 4,-2? Click here to see answer by Alan3354(30993)

 Question 262314: Find and label the vertex and the line of symmetry. Graph the function f(x)=1/2x^2 Please help me solve. Click here to see answer by richwmiller(9143)

 Question 262307: Give exact and approximate solutions to 3 decimal places. (x+4)^2=36 Please help me solve. Click here to see answer by solver91311(16897)

 Question 262441: I have tried this question many time but was unsuccessful in getting the right answer :( Please help me!! The solution set of the equation 2x^2-6x+3=0 is ?? Click here to see answer by jim_thompson5910(28595)

 Question 262508: Use the discriminant to determine how many real number solutions the quadratic equation -4x^2 + 3x - 28 =0 has. Click here to see answer by stanbon(57377)

 Question 262517: Find the dimensions of the rectangle of greatest area whose perimeter is 20 cm. Click here to see answer by drk(1908)

 Question 262561: I have a word problem that I have no idea how to do. can someone explain the steps to me? Please?? A ball is thrown vertically upward from the ground. Its distance in feet from the ground in t seconds is s=-16t^2+128t. After how many seconds will the ball be 192 feet from the ground? Click here to see answer by ankor@dixie-net.com(15659)

 Question 262631: How do you find the X and Y intercepts of a quadratic equation without making a graph? Click here to see answer by Alan3354(30993)

 Question 262670: the length of a flag is twice the width. Find the width of a flag with an area of 1250 cm² Click here to see answer by mananth(12270)

 Question 262600: (1/2)r(r+1)-36=0 Click here to see answer by mananth(12270)

 Question 262790: find the vertex, the line of symmetry, the maximum or minimum value of the quadratic function, and graph the function. f(x)=x^2-4x-1 Please help me solve. Click here to see answer by drk(1908)

 Question 262793: find and label the vertex and the line of symmetry.graph the function. f(x)=1/2x^2 Click here to see answer by drk(1908)

 Question 262792: Solve by completing the square. m^2-(49/2)m=1/2 the solutions are? please help me solve. Click here to see answer by drk(1908)

 Question 262791: find and label the vertex and the line of symmetry. Graph the function. f(x)=2(x-3)^2 please help me solve. Click here to see answer by drk(1908)

 Question 262818: x+3*x^(1/2)-15=5*x^(1/2) Click here to see answer by drk(1908)

 Question 262817: (x+(2/x))/(7-(2/x))=6x Click here to see answer by drk(1908)

 Question 262879: When finding the volume of a box; (20-2x)(16-2x)(x) 1st term(20times16) = 320 3ed term(-2xtimes-2x)=+4x^2 How come the 2ed term is -72x??? I don't see the math. thank you Click here to see answer by palanisamy(496)

 Question 263025: Please explain and solve. Thank you. A rain gutter is made from sheets of aluminum that are 20 inches wide. Determine the depth of the gutter that will allow a cross-sectional area of 13 square inches. Show that there are 2 different solutions to the problem. Round to the nearest tenth of an inch. x(20+2x)= 13. Click here to see answer by stanbon(57377)

 Question 263030: I need your help on this problem: 4t^2+9=12t Click here to see answer by stanbon(57377)

 Question 263032: 2y^2+5y=3 Click here to see answer by unlockmath(1603)

 Question 263044: Sorry I just wanted to make sure the problem I sumitted earlier was correct. The correct problem is:2y^2+5y=3 read as follows:2y(squared)+5y=3 did not understand where the x is coming from in the previous solution, there is no x in the problem. Click here to see answer by stanbon(57377)
 Question 263044: Sorry I just wanted to make sure the problem I sumitted earlier was correct. The correct problem is:2y^2+5y=3 read as follows:2y(squared)+5y=3 did not understand where the x is coming from in the previous solution, there is no x in the problem. Click here to see answer by Earlsdon(6287)

 Question 263077: Please help!! I am suppose to solve this by square root property 16w^2+27=0 16w(squared)+27=0 Click here to see answer by richwmiller(9143)