Tutors Answer Your Questions about Radicals (FREE)
Question 184704: For each of the following equations use the discriminant to determine what type of number the solutions will be (i.e. rational, irrational, or imaginary), and how many solutions exist. Defend your answers using algebra.
a) 9x^2-12x+4=0
b) 2x2+7x-3=0
Click here to see answer by vleith(2983)  |
Question 184754: Jane comes up to you with the following dilemma:
She read in the book that  but she
did some math on her own and came up with the following:
Her question is how can this be? Write a paragraph explaining how to resolve this dilemma for her.
Click here to see answer by Edwin McCravy(20055)  |
Question 185652: If one-fifth of the oil flows out every hour and 50,000 imperial gallons remain in the tank after 3 hours, how much will be in the tank after 10 hours?
I solved this problem by taking the formula (x-.20x)= y and performing it seven times, for the answer 10,485.76 gallons. However, how do you make the equation simpler using roots and rational exponents?
Click here to see answer by Alan3354(69443)  |
Question 185989: Thanks for your help on a question last week. The answer was very helpful. I just have two more. Hopefully you can show me the error of my ways.
Solve for X. I think the answer is x is not equal to 8 or -8.
(X/X^2-64)+(8/x-8)=1/x+8
My next question is:
Simplify so there are no radicals in the denominator
4/sq root of x + sq root of 2y
Click here to see answer by stanbon(75887) |
Question 186088: Thomas is going to make an open-top box by cutting equal squares from the four corners of an 11 inch by 14 inch sheet of a cardboard and folding up the sides. If the area of the base is to be 80 square inches then what size square should be cut from each corner?
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 186279: could someone explain to me how i should siplify sqare roots as such;
2sqrt(3)+sqrt(27)-sqrt(1/3)
or
sqrt(1/2)*(sqrt(8)+sqrt(2))
or
sqrt(18)-sqrt(3)over sqrt(6)
and the last thing i need help in would be; sqrt(a)+sqrt(b) over sqrt(a)-sqrt(b)
i totally suck when it comes to things like sqrt =(
Click here to see answer by Alan3354(69443) |
Question 186518: HELP ME PLEASE...
I dont really undersatnd radicals.... how do you solve them.
k I think this is right... the problem was radical 44 and I got 11 radical 4.
But I need help with these problems.....
radical 48
radical 200
1/2 radical 112
radical 2 * radical 8
and problems like these....
radical 7/9
2 radical 5/4
2 radical 10/2
8 radical 13/9
4 radical 16/4
5 radical 6/2
and problems like....
radical 32 over radical 25
radical 49 over radical 4
radical 9 over radical 4
radical 64 over radical 16
and problems like these...
1/2 radical 32 * radical 2
radical 9 * 4 radical 25
radical 7 * radical 18 over radical 2
radical 10 * radical 16 all over radical 5
K i know that these will take up a lot of time to explain but I really need your help. If you dont want to do all these problems then dont but it would help me out tons. These are only like half of my home work please please help me thanks so much!!!!
Click here to see answer by Alan3354(69443) |
Question 186855: 1. (/ represents square root of)
Simplify: (/5-3)(/5-1)
2. Also How far above the water would a submarine periscope have to be to locae a ship 3.5 mi away? The equation for the distance in miles that the lookout can see is D=1.4/h, where h is the height in feet above the surface of the water.
Click here to see answer by vleith(2983) |
Question 187713: f(x)=k2^x/12 can be used to determine the frequency, in cycles per second, of a musical note that is x half-steps above a note with frequency k.
The frequency of concert A for a trumpet is 440 cycles per second. Find the frequency of the A that is two octaves (24 half-steps) above concert A.
I tried to plug in the numbers but it does not seem right:
x=440(2)^24/12
x=440(2)^2
x=440(4)
x=1760
Click here to see answer by Alan3354(69443) |
Question 188408: I have tried and tried these problems. I am in ninth grade and here is the question: when a skydiver jumped from an airplane, the time it takes to free fall a given distance can be estimated by the formula t= the square root of 2s/9.8, where t is in seconds and s is in meters. If Julie jumps from an airplane, how long will it take her to free fall 750 meters?
Click here to see answer by josmiceli(19441)  |
Question 188410: i need help on this one too. to estimate how long a thunderstorm will last, meteorologists can use the formula: t=the square root of d to the third power divided by 216, where t is the time in hours and d is the diameter of the storm in miles
Click here to see answer by feliz1965(151) |
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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, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710
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