# Questions on Algebra: Radicals -- complicated equations involving roots answered by real tutors!

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 Algebra: Radicals -- complicated equations involving roots Solvers Lessons Answers archive Quiz In Depth

 Question 259730: The equation that I am haveing trouble with is w=Cr^-2 An object weighs 100 pounds when it is a sea level what is the value of c that makes the equation true? Sea level is 3963 miles from the center of the earth. Click here to see answer by unlockmath(1599)

 Question 259725: How do you simplify 5(as an exponent)(radical sign)y 24(as an exponent) z 2(as an exponent). Click here to see answer by Alan3354(30924)

 Question 259540: provide an expression to simplify that includes rational exponents Click here to see answer by Fombitz(13828)

 Question 259958: sqaure root of 21 divided by the sqaure root of 3 Click here to see answer by richwmiller(9132)

 Question 260094: I have the answer to this problem, however, I need to know how the formula is calculated. Please advise and thank you! Find the rate of speed of a car that left a 150 feet skid mark. Round to the nearest whole number and solve the formula for L. r=2√5*L r=55 and L=150 55=2√5(150) Click here to see answer by stanbon(57203)

 Question 260213: Here is a sample problem similar to the one I am having trouble with: (6+4)(6-4)(6-4)=6^(2)-^(2)=36-7=29 (Correct answer is -76) But I am not sure how to get there. Click here to see answer by Alan3354(30924)

 Question 260366: (4 square root of 3)(square root of 14) Click here to see answer by jim_thompson5910(28476)

 Question 256383: If 10 is subtracted from a number, the result is equal to the square root of 2 more than the number. Find the number Click here to see answer by jsmallt9(3296)

 Question 260670: expand and simplify (square root 2y +3) all square Click here to see answer by jsmallt9(3296)

 Question 260669: the problem says to list all numbers for which the rational expression is undefined. b-8 ------- 8b-32 possibilites 4 32 0 -8 Click here to see answer by Theo(3458)

 Question 260673: divide and simplify. a2 is A squared A2+3a-18 a2+12a+36 ------------ div --------------- A2+6a+9 a2+4a-21 Click here to see answer by checkley77(12569)

 Question 260804: HI I'm working on solving quadratic equations using the square root method. x^2-14x+49=-144 Thats x to the second minus 14x plus 49 equals -144. thanks Click here to see answer by Fombitz(13828)

 Question 261836: two brothers,morris & martin are in their backyard.morris is taking down a wall on one side of the yard while martin is building a wall on the other side. martin starts from scratch and lays 2 bricks every minute. meanwhile, morris takes down 3 bricks each minute from his wall. it takes 55 minutes to finish tearing down his wall.how many bricks were originally in the wall morris was taking down? when did the walls have the same number of bricks? Click here to see answer by stanbon(57203)

 Question 262419: sqroot(3-x) + 28 = x + 25 x=? Click here to see answer by drk(1908)

 Question 262618: i need to find the value of the variable that makes each expresion a real number for the following equation (2y-7)1/2 what is the real expresion for y Click here to see answer by stanbon(57203)

 Question 262725: Hi If I have w is less than and or equal to -5 for 1 answer and the - sideways sign that lookes like to circles contected together, how would I plot it on a number line? Thanks Rachel Click here to see answer by drk(1908)

 Question 262722: Hi I need help with this problem. 5 over x-4 - 6 over x+3 = 1 Thank you Rachel Click here to see answer by vksarvepalli(154)

 Question 262745: Simplify each expression. Rationalize all denominators. Assume that all variables are positive. 1.} http://i931.photobucket.com/albums/ad157/DominiqueakaDyme18/95736-8172006-32524-PM-1294056231.gif Thank you so much for all the help...really having trouble wit these things...;`) Click here to see answer by richwmiller(9132)

 Question 263222: I need to put this as a single radical expression (3sqroot sign 8)(2 sqroot sign 3) Thanks Click here to see answer by unlockmath(1599)

 Question 263300: what is the 7nth root of -2187a raised to 8 Click here to see answer by Alan3354(30924)

 Question 263349: First of all, how do I express a radical expression using a standard keyboard. For example, I express an exponent using a carat followed by the exponent; how do I express radical 2t^2? Click here to see answer by stanbon(57203)

 Question 263419: Hint for this assignment: Pay attention to the units of measure. You may have to convert from feet to miles several times in this assignment. You can use 1 mile = 5,280 feet for your conversions. 1. Many people know that the weight of an object varies on different planets, but did you know that the weight of an object on earth also varies according to the elevation of the object? In particular, the weight of an object follows this equation: , where C is a constant, and r is the distance that the object is from the center of the earth. a. Solve the equation for r. b. 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.) c. Use the value of C you found in the previous question to determine how much the object would weigh in i. Death Valley (282 feet below sea level) ii. The top of Mt McKinley (20,320 feet above sea level) Click here to see answer by richwmiller(9132)

 Question 263477: Hi there! I am lost on this! Thank you! Determine whether the triple of numbers can be the sides of a right triangle. 9, 12, 16 A) Yes B) No Click here to see answer by checkley77(12569)

 Question 263503: I saw a statement: If a is negative and n is odd then there is just one n-th root, and it is negative also. For example, 3 cube root(-1) = 5th root (-1) = -1. What is the reasoning for those three numbers above to be equal? Click here to see answer by stanbon(57203)