Tutors Answer Your Questions about Radicals (FREE)
Question 161578: I am having a problem with an equation but cannot figure out how to find it. The problem is: 30^2 = ((s+7)(1.5))^2 + (2s)^2
The answer for "s" is 9. What am I doing wrong?
(30)(30) = ((1.5s)+(1.5)(7))^2 + (2s)(2s)
900 = (1.5s + 10.5)^2 + 4s^2
900 = ((1.5s)(1.5s)+ (10.5)(10.5)) + 4s^2
900 = 2.25s^2 + 110.25 + 4s^2
900 - 110.25 = 2.25s^2 +110.25-110.25 + 4s^2
789.75 = 6.25s^2
789.75/6.25 = 6.25s^2/6.25
126.36 = s^2
sqrt 126.36 = s ---sqrt 126.36 does not equal 9---
Click here to see answer by Alan3354(31518)   |
Question 161621: I am simply asked to write an expression in "exponential form". I cannot find anything in my book that helps me although I am sure it's there.
The problem is:
cubed root of 5x to the 5th power.
Click here to see answer by gonzo(654) |
Question 161814: This isn't a very complicated radical question, but I don't understand it in any case.
√5 * √5
Is the answer just 5? or √5?
√5 * √10 Does this equal 3√5?
I realize that isnt one question but they're very short.
Thank you for your help.
Click here to see answer by Fombitz(13828)  |
Question 162013: This is from a worksheet. I have 2 questions that i'm not sure on.
Direction say simplify. Assume that no denominator equals 0.
1. sq. root 16x^2y^4
2. sq root 12-sq root 18+3sq root 50+sq root 75.
Sorry i don't have a sq. root sign on my computer
Please. help
Thanks
Click here to see answer by jim_thompson5910(28715) |
Question 162051: perform the multiplications and simplify. assume all variables represent positive numbers.
square root 2 parenthesis 2 times square root of 10 plus square root of 40 parenthesis?
first i factores square root 2 into the parenthesis, then simplified it and got an answer of 4 root 20 is that right?
Click here to see answer by schrammbledeggs(41) |
Question 163137: Hi, this is the problem I was told to do:
[SQRT(2x + 2)] - [SQRT(x - 3)] = 2
or
√(2x+2) - √(x-3) = 2
I've been told to FOIL this problem, but I don't understand how to FOIL it if its subtracting and not multiplying. What I do know is that the answer is equal to 7.
Thanks in advance.
Click here to see answer by jim_thompson5910(28715) |
Question 163508: Here are a few problems that I am not sure if I got them right. Thanks. Paul
1) problem: square root of 3x + 9, - 12 = 0
square root of 3x + 9 = 12
(square root of 3x + 9)^2 = (12)^2
3x + 9 = 144
-9 -9
3x = 135
3x/3 = 135/3
answer: x = 45
2) problem: square root of 3x, - square root of 3x-5, = 1
1 - , square root of 3x = square root of 3x-5
(1 - square root of 3x)^2 = (square root of 3x-5)^2
1 - 2 square root of 3x - 3x = -3x-5
6 = 2 square root of 3x
(4)^2 = (square root of 3x)^2
16/3 = 3x/3
answer: x = 16/3 (I think this answer is 3 but not sure on how to get it)
3) problem: ^3 square root of x - 2, = 3
(^3 square root of x -2 ) = (3)^3
x - 2 = 27
answer: x = 29
Click here to see answer by ankor@dixie-net.com(15746)  |
Question 163811: The Schwarzschild radius describes the critical value to which the radius of a massive body must be reduced for it to become a black hole.
R = 2 G M / c 2
where
G = gravitational constant 6.7x10 -11
M= mass of the object
C = speed of light 3x10 8
The sun has M = 2x10 30 . What is the Schwarzschild radius for the sun? [Note its true radius is 700,000.]
Click here to see answer by vleith(2825) |
Question 163751: I need help with this question. I am having a hard time knowing even where to start...
Suppose that an object is 100 pounds when it is at sea level. Find the value of C that makes the equation  true. (Sea level is 3,963 miles from the center of the earth)
Thank You
Click here to see answer by ankor@dixie-net.com(15746) |
Question 164000: Time to swing. The period T (time in seconds for one complete cycle) of a simple pendulum is related to the length L (in feet) of the pendulum by the formula 8T^2= (3.14)^2(L)
If a child is on a swing with a 10-foot chain, then how long does it take to complete one cycle of the swing?
Click here to see answer by stanbon(57967) |
Question 164387: I need help with this question as soon as possible. I have been working on it and cannot figure it out.
The weight of an object follows this equation: where C is the constant, r is the distance from the center of the earth (3963 miles). Using the value of C = 1570536900, determine how much an object would weigh in Death Valley (282 feet below sea level).
How much would the object weigh at the top of Mt. McKinley (20,320 feet above sea level).
Thank you!
Click here to see answer by josmiceli(9817)  |
Question 164386: I need help with this question as soon as possible. I have been working on it and cannot figure it out.
The weight of an object follows this equation: where C is the constant, r is the distance from the center of the earth (3963 miles). Using the value of C = 1570536900, determine how much an object would weigh in Death Valley (282 feet below sea level).
Thank you!
Click here to see answer by ankor@dixie-net.com(15746) |
Question 164836: I have been trying this question for 45 minutes and have looked at many examples. My teacher gave out his personal worksheet so I cannot check my homework answers. The question is: 3 square root sign 18 + 3 square root sign 32.
I tried breaking it down and and I just get more confused. I know you have to break it down though..? but how to I add the number outside originally? the number outside the square root sign is not an exponet.
Click here to see answer by stanbon(57967) |
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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
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