Tutors Answer Your Questions about Radicals (FREE)
Question 138243: Could you help me to solve the equation:
16/x^2=8/x+6
I know the LCD is x^2(x+6) and I multiply each term and I get
16(x+6)=8x^2
which turns into the equation
8x^2-16x+96=0 (right?)
which is where I get confused. I'm not sure if I am suposed to factor it out or use the quadratic formula to solve it. I know though that the answer involves a square root.
Please help!
Click here to see answer by stanbon(26273)   |
Question 138243: Could you help me to solve the equation:
16/x^2=8/x+6
I know the LCD is x^2(x+6) and I multiply each term and I get
16(x+6)=8x^2
which turns into the equation
8x^2-16x+96=0 (right?)
which is where I get confused. I'm not sure if I am suposed to factor it out or use the quadratic formula to solve it. I know though that the answer involves a square root.
Please help!
Click here to see answer by scott8148(3382)  |
Question 139075: My teacher taught us to do an equation a certain way. Like this: (problem) Find the square route of 18. Then she wants us to do this (below):
18
3*6
3*2*3 (mark out the threes and put them on the outside)
So now I have 3 and radical what?
Click here to see answer by stanbon(26273) |
Question 139299: Could you please show me how to do these.I'd really appreciate it.It's simplfying radicals.i'm going to try to explain this as best as i can.Its the root sign first and the numbers 72/8x and a small 2 above the x.thank you
Click here to see answer by stanbon(26273) |
Question 139787: The equation D=1.2√h gives the distance, D, in miles that a person can see to the horizon from a height, h, in feet. Use 1 mile = 5,280 feet.
Question: Long's Peak in the rocky Mountain National Park, is 14,255 feet in elevation. How far can you see the horizon from the top of Long's Peak? Can you see Cheyenne, Wyoming (About 89 miles away)? Explain your answer.
Click here to see answer by checkley75(3666) |
Question 139841: Hi. I am working with rational expressions and I am sure how to answer these two questions. I hope someone can help me. Thank you so very much the
Simplify the rational expression:
2x^2 – 12x + 18/ 2x^2 - 18
Divide:
x^2 – 9x + 20/3x - 15 ÷ x^2 – 16/9x + 36
Click here to see answer by checkley77(7049) |
Question 139782: 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: w=cr^-2, where C is a constant, and r is the distance that the object is from the center of the earth. Use 1 mile = 5,280 feet.
Question: 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.
Click here to see answer by ankor@dixie-net.com(6693)  |
Question 139988: hi,could you please help me solve this equation?
f(x)=(3x^5/2) Y^5/2 √25x^4y^4
I attempted to simplify the last part of the equation to 5x^2y^2, but then i got lost when i tried to simplify the whole thing together. thanks for your help in advance.
Click here to see answer by stanbon(26273) |
Question 141180: Please help. Sorry i didn't know what category to put this under.
suppose you are standing 500 ft away from atree and you see a hawk hovering directly above that tree. the angle of elevation from you to the hawk is 24 degrees. to the nearest foot, at what height is the hawk hovering.
thanks so much
Click here to see answer by Earlsdon(4900) |
Question 141054: You provide the manager with a quadratic equation that models the expected number of ticket sales for each day x. (x=1 is the day tickets go on sale).
Tickets = -0.2x^2+12x+11
a. Does the graph of this equation open up or down? How did you determine this?
b. Describe what happens to the tickets sales as time passes?
c. Use the quadratic equation to determine the last day that tickets will be sold. (Note: Write your answer in terms of the number of days after ticket sales begin.)
d. Will tickets peak or be at a low during the middle of the sale? How do you know?
e. After how many days will the peak or low occur?
f. How many tickets will be sold on the day when the peak or low occurs?
g. What is the point of the vertex? How does this number relate to your answers in parts e and f?
h. How many solutions are there to the equation ? How do you know?
i. What do the solutions represent? Is there a solution that does not make sense? If so, in what ways does the solution not make sense?
Click here to see answer by ankor@dixie-net.com(6693) |
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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
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