Tutors Answer Your Questions about Radicals (FREE)
Question 476177: I have been working on this equation involving 2 radicals for 2 days. Here is what I have so far.
radical(3x+1)-1- radical (x+4) = 0
isolating 1 radical: radical (3x+1)-1 = radical (x+4)
squaring both sides of the equation: (radical(3x+1)-1)^2 = (radical(x+4))^2
(3x+1)+ 2 radical(3x+1)+1 = x+4
2 radical(3x+1) = -2x+2
squaring both sides again: (2 radical(3x+1))^2 = (-2x+2)^2
4(9x+1)=4x^2-4x+4
36x+4= 4x^2-4x+4
factoring:0=4x^2-40x
Where do I go from here to get the answer of 5 as a solution?
Click here to see answer by scott8148(6628)   |
Question 476276: 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? I took 217=16t^2+32t = -217 = 16t^2+32t-217=0 I did a=16, b=32, and c= -217. I used the formula -b+-√b^2-4ac/2a I got -32+-√14,912/32. I'm lost from that point on to get the answer. I have the answer key it says it's 2.8 seconds. Can you help me complete this? Thanks.
Click here to see answer by scott8148(6628) |
Question 476276: 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? I took 217=16t^2+32t = -217 = 16t^2+32t-217=0 I did a=16, b=32, and c= -217. I used the formula -b+-√b^2-4ac/2a I got -32+-√14,912/32. I'm lost from that point on to get the answer. I have the answer key it says it's 2.8 seconds. Can you help me complete this? Thanks.
Click here to see answer by bucky(2189) |
Question 477314: Four different methods of solving a quadratic equation have been discussed in this course: factoring,the square root property,completing the square,and the quadratic formula.Explain under what circumstances each methods would be preferred over any of the other methods. Give an example for each circumstances.
Click here to see answer by lwsshak3(11628) |
Question 478744: i need the answers asap and also how arrived at answer please help
1.6x^3y-3x^2y^2 +18x^2y -9xy^2 completly factro the polynomial
2. A rectangle has an area of 2x^2 +5x +3 find possible dimensios for the rectangle Make a sketch of the rectangle
3. A sqaure has an area of 9x^2+30x+25 find the length of a side make a sketch of the square
Click here to see answer by mananth(16946)  |
Question 480164: Aki's bicycle designs has determined that when x hundred bicycles are built the average cost per bicycle is given by C(x)=0.1x^2-1.1x+7.715 where C(x) is in hundreds of dollars. How many bicycles should the shop build to minimize the average cost per bbicycle?
Click here to see answer by nerdybill(7384)  |
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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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