Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 212171: I am not sure if this is a quadratic actually, but I wasn't sure what selection in the drop down menu fit this problem.
The equation I am stuck on is s=1/3gt^2 (gt squared) and it says to solve for t
I tried a few methods to try to get t over on the left alone but I keep getting stuck.
Click here to see answer by Theo(13342)

Question 212033: A rectangular piece of carpet has a length that is 5 yards shorter than twice its width. The area of the carpet is 88 square yards. Find the width only.
Click here to see answer by drj(1380)

Question 212341: given f(x) = ax^2 + bx + 5. Find a and b such that f(x + 1) - f(x) = 8x + 3
Click here to see answer by jim_thompson5910(35256)

Question 212472: what is the answer to the equation: 13x squared +1=6x
Click here to see answer by stanbon(75887)

Question 212473: I need help with quadratic word problems.
Noah is trying to qualify for a race. A driver needs to complete 8 laps of a seven mile track at an average speed of 105.66 mph to qualify. Noah has already completed the first three laps. His average speed so far is 92 mph. What must his average speed be for the rest of the race to qualify?
Click here to see answer by stanbon(75887)

Question 212443: I am trying to figure out what method to use and I am stumped. I've tried the Quadratic Formula and it's just not coming out right! Thanks!
Click here to see answer by Alan3354(69443)

Question 212474: I need help with quadratic word problems!
Flight 725 left New York at 10.28 am flying north. Flight 245 left from the same airport at 11.18 am flying south at 120 kph less than three times the speed of flight 725. At 1.06 pm they are 1,030 kilometers apart. What is the average rate of speed for Flight 245 and for Flight 725?
Click here to see answer by Theo(13342)

Question 212499: 100 - T = 125.. My daughter who is in 4th grade brought this problem home on her math homework page and I cannot remember this far back!! Sounds horrible, I know. HELP PLEASE! :0)
Click here to see answer by ankor@dixie-net.com(22740)

Question 212567: can u help me in algebra 2 im failing
this is a problem on my homework tonight
solve each equation by factoring:
x^2-11x=0
x squared-11x=0
Click here to see answer by Alan3354(69443)

Question 212726: PLS HELP ME WITH MY PROBLEM!!
QUADRATIC EQUATION BY COMPLETING SQUARE
12X^2+11X+2=0
Click here to see answer by stanbon(75887)

Question 212270: (2y-6)m+(x+3)m=26
Click here to see answer by DRichardson(63)

Question 212895: simplify expression. write answer with a positive exponet only
(-p)^-21
Click here to see answer by rapaljer(4671)

Question 212909: HOW TO FACTORISE THIS QUESTION WITHOUT USING THE QUADRATIC FORMULA METHOD BUT EITHER CROSS OR GROUPING METHOD
12X^2-45X-12=0
Click here to see answer by rapaljer(4671)

Question 212914: -sqrt(7), 7sqrt(7)
Click here to see answer by nerdybill(7384)

Question 212951: solve following equation by using the square root property
(w-10)^2=81
w=? and w=?
Click here to see answer by rapaljer(4671)

Question 212951: solve following equation by using the square root property
(w-10)^2=81
w=? and w=?
Click here to see answer by Earlsdon(6294)

Question 212952: solve the following quadratic equation. round answers 2 decimal places.
0.7x^2= 0.1x+0.3
Click here to see answer by drj(1380)

Question 212949: perform indicated operation, write in standard form a+bi
(-2,2i) - (-4-8i)
Click here to see answer by Earlsdon(6294)

Question 212949: perform indicated operation, write in standard form a+bi
(-2,2i) - (-4-8i)
Click here to see answer by stanbon(75887)

Question 213149: It takes a girl 48 minutes to deliver newspapers on her route; however, if her brother helps, it takes them only 12 minutes. How long would it take her brother to deliver the newspapers by himself?
Click here to see answer by nerdybill(7384)

Question 213153: A baseball is thrown upward with an initial speed of 69ft/sec. The number of feet s above the ground after t seconds is given by the equation s=-16t^6+69t. When will the baseball be 54 feet above the ground?
Click here to see answer by nerdybill(7384)

Question 213152: A cylindrical can has a volume of 128pi cm^3 and is 8cm tall. What is its radius?
Click here to see answer by rapaljer(4671)

Question 213171: 3x^2-9x=0
Click here to see answer by drj(1380)

Question 213242: 5w^2-45 factored out completely
Click here to see answer by drj(1380)

Question 213308: Ticket Sales
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 = -0.2x^2+12x+11
a.Does the graph of this equation open up or down? How did you determine this?
b.Describe what happens to the tickets sales as time passes?
c.Use the quadratic equation to determine the last day that tickets will be sold.(Note write your answer in terms of the number of days after ticket sales begin.)
d.Will tickets peak or be at a low during the middle of the sale?How do you know?
e.After how many days will the peak or low occur?
f.How many tickets will be sold on the day when the peak or low occurs?
g.What is the point of the vertex?How does this number relate to your answers in parts e and f?
h.How many solutions are there to the equation -2x^2+12x+11=0? How do you know?
i.What do the solutions represent? Is there a solution that does not make sense? If so, in what ways does the solution not make sense?
Click here to see answer by stanbon(75887)

Question 213173: A boy can row a boat at a constant rate of 3mi/hr in still water. He rows up-stream for 20 minutes and then rows down-stream, returning to his starting point in another 15 minutes. Find the total distance traveled.
Click here to see answer by stanbon(75887)

Question 213324: Solve for x in terms of the other letters. 4x(to the fourth power)y(to the fourth power) + 2x(squared)y(squared) + .75= 0
Click here to see answer by Alan3354(69443)

Question 213437: (x^2+7x)/2 =-3
I need help with this . Can someone please explain what to do for me using this example. I need to know the steps as well as how you got the answer. Thankyou for you time. Your are appreshated.

Click here to see answer by drj(1380)

Question 213438: (x^2⁄2)- 4 � 6x = - 4
I need help with this . Can someone please explain what to do for me using this example. I need to know the steps as well as how you got the answer. Thankyou for you time. Your are appreshated.
Click here to see answer by stanbon(75887)

Question 213436: Solve by factoring: 16x2 - 14x + 1 = -6x
I need help with this . Can someone please explain what to do for me using this example. I need to know the steps as well as how you got the answer. Thankyou for you time. Your are appreshated.
Click here to see answer by rapaljer(4671)

Question 213435: Divide: (4 + 2i)/ (4 � 2i)
I need help with this . Can someone please explain what to do for me using this example. I need to know the steps as well as how you got the answer. Thankyou for you time. Your are appreshated.
Click here to see answer by stanbon(75887)

Question 213434: Multiply: (1/7 � i)^2 I need help with this . Can someone please explain what to do for me using this example. I need to know the steps as well as how you got the answer. Thankyou for you time. Your are appreshated.
Click here to see answer by stanbon(75887)

Question 213428: f(x)=-3x^2 make a table and a graph

Click here to see answer by drj(1380)

Question 213552: how can i telln if a graph opens up or down by looking at the equation
Click here to see answer by rapaljer(4671)

Question 213552: how can i telln if a graph opens up or down by looking at the equation
Click here to see answer by drj(1380)

Question 213543: A box with an open top is to be constructed by cutting 3-inch squares from the corners of a rectangular sheet of tin whose length is twice its width. What size sheet will produce a box having a volume of 24in^3?
Click here to see answer by checkley77(12844)

Question 213520: a piece of wire 10 m long is to be cut into two pieces one of them is 2/3 as long as the other, how should the wire be cut ?
Click here to see answer by checkley77(12844)

Question 213589: Solve by using the quadratic formula.
(75/w^2) - (18/w) + 1 = 0
Click here to see answer by mathcrazygirl(1)

Question 213547: A college student has finished 49 credit hours with a GPA of 2.5. To get into the program she wishes to enter, she must have a GPA of 3.3. How many additional credit hours of 4.0 work will raise her GPA to 3.3?
Click here to see answer by ankor@dixie-net.com(22740)

Question 213788: I have a quadratic equation whos solution is 3+ 3 times radical 7i over six can this equation be reduced to 1+ radical 7i over two?
Click here to see answer by tutor_paul(519)

Question 213860: find the maximum or minimum and the value of x when it occurs using -b/2a (vertex) and then equation 10-10x-x^2
Click here to see answer by solver91311(24713)

Question 213846: 64x^6 - 1
Im confused.
Click here to see answer by nerdybill(7384)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 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