Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE) Get help from our free tutors ===> Algebra.Com stats: 2013 tutors, 419587 problems solved View all solved problems on Quadratic_Equations -- maybe yours has been solved already! Become a registered tutor (FREE) to answer students' questions. Click here to see problems AND answers on one page Question 475399: What point is the intersection of the graphs of x^2 + y^2 = 25 and y = x + 7? Click here to see answer by Alan3354(30993)   Question 475399: What point is the intersection of the graphs of x^2 + y^2 = 25 and y = x + 7? Click here to see answer by ewatrrr(10682)   Question 475404: What point is the intersection of the graphs of y = 3x, x^2 + 4y^2 = 37, and y^2 - x^2 = 8 ? Click here to see answer by ewatrrr(10682)   Question 475403: What point is the intersection of the graphs of x = -y, x^2 + y = 2, and -y^2 + 3x = 2? Click here to see answer by ewatrrr(10682)   Question 475449: Solve for x. x^2+14x+4=0 Click here to see answer by Tatiana_Stebko(1326)   Question 475457: x² + 0x - 16 = 0 is using zero squared in two places, but has two solutions. x² = -16 has no real solutions, but does not explicitly involve 0². Click here to see answer by richard1234(5390)   Question 475456: 3x² - 9x + 7 = 0 be? How many solutions would that mean? Click here to see answer by MathLover1(6632)   Question 475458: ax^2+bx+c=0. Click here to see answer by Tatiana_Stebko(1326)   Question 475472: If your equation is -0.2x + x² + 0.2 = 0, does this parabola open up or down? Which term's coefficient determines that? Click here to see answer by richard1234(5390)   Question 475495: find the solution set by factoring and using the zero product rule or using the quadratic formula. 11x^2-12x=-1 Click here to see answer by htmentor(789)   Question 475503: Simplify (-5b^-3)(-8b^-5) Please show me step by step to get the answer. Thanks Click here to see answer by MathLover1(6632)   Question 475466: Can you please help me solve this word problem involving quadratic equations, I am lost and can't figure out where to start. The function D(x) models the cumulative number of deaths from a disease x years after 1984, estimate the year when there were 100,000 deaths. D(x) =2285x^2 + 5583x + 5540. There were approximatley 100,000 in the year __________________ (round to the nearest year) Your help will be appreciated! Thanks Abby Click here to see answer by Theo(3461)   Question 475518: find the vertex line of symmetry maximum or minimum value of f(x) graph the function f(x)=1/5(x+4)^2+3 ^means raising to that power and 1/5 is a fraction Click here to see answer by ewatrrr(10682)   Question 475576: Can someone help me use quadratic formula to solve: Solve and graph x2 + x – 4 = 0. (x^2+x-4 =0) If possible can you also graph the answer using word program? and send me an attachment? Click here to see answer by jim_thompson5910(28595)   Question 475619: Find the Logarithm: log2(logb(SQRE ROTb)) The 2 and b is the undersub Please show me step by step to get the answer. Thanks Click here to see answer by stanbon(57337)   Question 475625: Simplify: Assume that b and c are positive. (8b^2/3 / 2b^4/5)^3/2 Please show me step by step to get the answer. Thanks Click here to see answer by stanbon(57337)   Question 475708: quadratic equations; completing the sqaure y^2+2y=2 Click here to see answer by ewatrrr(10682)   Question 475728: If you have -5x² + 12x - 10 = 0, what is the discriminant? How many solutions are there? Click here to see answer by Alan3354(30993)   Question 475756: What is the discriminant and how do you find it if you are given a quadratic equation? For instance, if you have -x² + 12 + 20 = 0, what would the discriminant be? How many solutions would this equation have? Click here to see answer by rfer(12657)   Question 475756: What is the discriminant and how do you find it if you are given a quadratic equation? For instance, if you have -x² + 12 + 20 = 0, what would the discriminant be? How many solutions would this equation have? Click here to see answer by Gogonati(809)   Question 475787: Suppose you are an event coordinator for a large performance theater. One of the hottest new Broadway musicals has started to tour, and your city is the first stop on the tour. You need to supply information about projected ticket sales to the box office manager. The box office manager uses this information to anticipate staffing needs until the tickets sell out. You provide the manager with a quadratic equation that models the expected number of ticket sales for each day x. ( x=1 is the day tickets go on sale). tickets=-0.26x squared+13x=35 1. Does the graph of this equation open up or down? How did you determine this? Click here to see answer by ewatrrr(10682)   Question 475786: Suppose you are an event coordinator for a large performance theater. One of the hottest new Broadway musicals has started to tour, and your city is the first stop on the tour. You need to supply information about projected ticket sales to the box office manager. The box office manager uses this information to anticipate staffing needs until the tickets sell out. You provide the manager with a quadratic equation that models the expected number of ticket sales for each day x. ( x=1 is the day tickets go on sale). tickets=-0.26x squared +13x+35 1. Does the graph of this equation open up or down? How did you determine this? Click here to see answer by ewatrrr(10682)   Question 475750: Tickets will sale but once it reaches that peak point the sales will start to decrease because anytime you have a coefficients with negatives such as in this equation we already know that it is going to descend at some point which again will start once it reaches a certain point. Click here to see answer by richard1234(5390)   Question 475624: Simplify: (2bc^-7 / 5b^-1c^-2)^3 Please show me step by step to get the answer. Thanks Click here to see answer by ankor@dixie-net.com(15650)   Question 475774: solve v^2-6v-7=0 ^means raising to that power Click here to see answer by Alan3354(30993)   Question 475882: Simplify: Assume that b and c are positive. b^2/5(b^8/5 + b^3/5) Please show me step by step to get the answer. Thanks Click here to see answer by MathLover1(6632)   Question 475628: Simplify: Assume that b and c are positive. (8bc^3)^1/3 / (81b^-5c^3)^3/4 Please show me step by step to get the answer. Thanks Click here to see answer by ankor@dixie-net.com(15650)   Question 475899: Equations Reducible to Quadratic Form: Use the given substitution to solve the equation: x4 - 7x2 + 6 = 0 u=x2 I don't know how to enter the CARET symbol, but eh x is to the 4th power and the other x is to the 2nd power Click here to see answer by mananth(12270)   Question 475936: Solve. Round any approximate solution to the fourth decimal place. 20=-3+4(2)^2 Please show me step by step to get the answer. Thanks Click here to see answer by richard1234(5390)   Question 475932: Solve. Round any approximate solution to the fourth decimal place. 5^x+7=50-3(5)^x Please show me step by step to get the answer. Thanks Click here to see answer by lwsshak3(6498)   Question 475997: can you show me the steps to solve the following: 2+3i/5+3i. Click here to see answer by Tatiana_Stebko(1326)   Question 476022: Can you show me the steps in solving the following: Find the vertex: f(x)= x^2-10x+34 Thanks! Click here to see answer by ankor@dixie-net.com(15650)   Question 475935: Solve. Round any approximate solution to the fourth decimal place. 3^2r x 3^r-4=97 Please show me step by step to get the answer. Thanks Click here to see answer by Tatiana_Stebko(1326)   Question 476116: Help in solving 6p+1<-7 How do you plot on a graph Click here to see answer by rfer(12657)   Question 476071: How do you know? Quadratic equation with positive discriminant Click here to see answer by Alan3354(30993)   Question 476210: use the quadratic formula to solve the equation x^2-5x=-9 Click here to see answer by Tatiana_Stebko(1326)   Question 476328: Can you please help me solve this story problem. A ball is thrown downward from a window in a tall building. It's position at time t in seconds is s=16t^2+32t, where s is in feet. How long (to the nearest tenth) will it take the ball to fall 217 feet? Click here to see answer by jorel1380(2518)   Question 476328: Can you please help me solve this story problem. A ball is thrown downward from a window in a tall building. It's position at time t in seconds is s=16t^2+32t, where s is in feet. How long (to the nearest tenth) will it take the ball to fall 217 feet? Click here to see answer by stanbon(57337)   Question 476337: Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form, ax^2+bx+c=0 4; only solution Click here to see answer by jorel1380(2518)   Question 476337: Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form, ax^2+bx+c=0 4; only solution Click here to see answer by stanbon(57337)   Question 476345: solve x^2+6x-4=0 Click here to see answer by jorel1380(2518)   Question 476259: In the diagram given below, three circles having centres at A, B and C touch each other externally. (a) given that the radius of the three circles are 4cm, x cm, and (2x+2) cm respectively, and angle ABC=90°, form an equation in x and show that it reduces to 3x2-2x-8=0 (b) Solve the equation 3x2-2x-8=0 (c) Hence, calculate the length of th perpendicular from B to AC Click here to see answer by Edwin McCravy(8908)   Question 476397: find the value of x in the following equation- x²+5670*x+153 = 0 Click here to see answer by Edwin McCravy(8908)   Question 476468: why is it a good idea to factor a quadratic equation before you solve? Click here to see answer by MathLover1(6632)   Question 476476: I am trying to solve x^2+14x=5. I make it to the middle of the problem and then get lost. Please help! Click here to see answer by jim_thompson5910(28595)

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