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Tutors Answer Your Questions about Radicals (FREE)
Question 47937: Could someone write a step by step solution for this problem?
19. A certain chain saw requires a fuel mixture of 5.5% oil and the remainder gasoline. How many liters of 2.5% mixture and how many of 9% mixture must be combined to produce 40.0 liters of 5.5% mixture?
A12 4/23 liters of 2.5% and 28 19/23 liters of 9%
B28 19/23 liters of 2.5% and 12 4/23 liters of 9%
C21 liters of 2.5% and 18 liters of 9%
D18 6/13 liters of 2.5% and 21 7/13 liters of 9%
E21 7/13 liters of 2.5% and 18 6/13 liters of 9%
F18 7/13 liters of 2.5% and 21 6/13 liters of 9%
20. Mary can row at the rate of 4 miles per hour in still water. Rowing downstream in a river, she can travel 3 times as far in 1 hour as she can rowing upstream. What is the rate of flow in the river?
A1 miles per hour
B2.5 miles per hour
C4 miles per hour
D2 miles per hour
E3.5 miles per hour
F3 miles per hour
Click here to see answer by stanbon(26297)   |
Question 47996: I need help rationalizing the denominator and simplifying this problem:
sqrt of 3 plus two over sqrt of 7 minus 7
I came up with this answer but it is not one of my options
sqrt of 21 plus 7 sqrt of 3 plus 2 sqrt of 7 plus 14 over -42
It looks like my professor put the negative sign in the numerator, but I am not sure. Would the negative from the 42 distribute through the entire numerator or just the first number?
Click here to see answer by stanbon(26297) |
Question 48059: Somebody please help me solve this problem. I tried and got a very weird high number.
Question: Convert(45)^(3/2) from exponent form to radical form, then simplify (without a calculator).
what I got:
sqr rt of (45^3)
= sqr rt of ((9*3)(5*3))
= sqr rt of ((9*9*9)(5*5*5))
= (3*3*3)sqr rt of (5*5*5)
= 27 sqr rt of (125)
= 27 sqr rt of (25*5)
= (5)27 sqr rt of (5)
= plus or minus 135 sqr rt of (5)
Is this right?
Thank you!
Click here to see answer by stanbon(26297) |
Question 48119: I just can't get it in my head
Assignment Name: Unit 3 Discussion Board
Deliverable Length: 2 - 4 paragraphs
Details: Radical and rational exponent notation are two ways to show the same process.
Explain the similarities between radicals and rational exponent notation.
Provide at least two other examples of mathematical notation or wording denoting the same process.
Click here to see answer by tutorcecilia(2042) |
Question 48770: I can't understand this topic. So... I would like to ask if you can teach me about this. I really need your help right now. I have an exam tommorrow about algebra. By the way, I'm now in first year.
Click here to see answer by tabi(3) |
Question 49192This question is from textbook 
: I am having trouble with the radical
equations-this is what I have so far:
sqrt of 4x+1,+3=0, I'm sorry I cannot
copy & paste equation editor in here This question is from textbook
Click here to see answer by AnlytcPhil(958) |
Question 48636: Please help. These problems look so easy but I just can't seem to get the right answer.
First Problem:
1/√3 + 4/√27 - 2/√12
Second Problem:
2 cubed root of 27x + 2 cubed root 64x
I came up with 2 answers:
14 cubed root of x -OR- 2 cubed root of 91x
Which one is correct??
Click here to see answer by consc198(59) |
Question 49364This question is from textbook
: I am doing something wrong here if you could please assist... sqrt 4x + 8, + 8=0
I dropped the zero, and minused (-8)^2 and I came up with 4.This question is from textbook
Click here to see answer by Nate(3495) |
Question 49411This question is from textbook
: I am coming up with a decimal answer for these but they need to be in whole number or sq root form. What am I doing wrong? I am trying to simplify sqrt of 500 and sqrt of 108...This question is from textbook
Click here to see answer by Earlsdon(4900) |
Question 49422This question is from textbook
: I am trying to figure the distance using d = sqrt (x^2 - x^1)^2 + (y^2 - y^1)^2 for (-4,0) and (-5,-3); I am getting confused with the negatives. Is this the right formula? This question is from textbook
Click here to see answer by Earlsdon(4900) |
Question 50108: Here are two problems I have been asked to rationalize and I pray I have done them correctly. Thank you so much. Andrea
(A)
(14 - sqrt x) / (sqrt x)
(14 - sqrt x)(sqrt x)
14 sqrt x - x
(B)
(sqrt x) / (14 - sqrt x)
(14 sqrt x + x) / (196 - x)
Click here to see answer by stanbon(26297) |
Question 50108: Here are two problems I have been asked to rationalize and I pray I have done them correctly. Thank you so much. Andrea
(A)
(14 - sqrt x) / (sqrt x)
(14 - sqrt x)(sqrt x)
14 sqrt x - x
(B)
(sqrt x) / (14 - sqrt x)
(14 sqrt x + x) / (196 - x)
Click here to see answer by tutorcecilia(2042) |
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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
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