Tutors Answer Your Questions about Quadratic Equations (FREE)
Question 146360: I cannot understand how to do these type of questions at all...Can you please help me and thanks:)
Page 575
Number 2
I have to write in standard form and determine the values of a,b, and c....
x^2 + 6x  5 = 0
Click here to see answer by orca(409) 
Question 148177: Buried Treasure. Ahmed has half of a treasure map, which indicates that the treasure is buried in the desert 2x + 6 paces from Castle Rock. Vanessa has the other half of the map. Her half indicates that to find the treasure, one must get to Castle Rock, walk x paces to the north, and then walk 2x + 4 paces to the east. If they share thier information, then they can find x and save a lot of digging. What is x?
Click here to see answer by josmiceli(13716) 
Question 148665: Hello. Please and I mean Please, help me know how to find the y value in a parabola. The y value should either be the highest or the lowest point in a positive or negative curved u. Thank you very much for your time in helping me solve this question.
Click here to see answer by Edwin McCravy(13211) 
Question 148667: Find the vertex of quadratic equation f(x) = 2x^2 + 4x9
(2x squared plus 4x minus 9)
This is what I have so far until I get lost:
step one: y= 2x^ + 4x  9
step two: y+9=2x^2 +4x
step three:y+9=2(x^2 +2x)
(half of 2=1 ; (1)^2 =1
Not sure where to go after this. thanks!
Click here to see answer by stanbon(69061) 
Question 148733: I have to solve the equation using the Indian method which is: a) Move the constant to the right of the equation, b) multiply each term by 4 times the coefficient of the x^ term, c) Square the coefficient of the x term and put it on both sides of the equation, d) take the square root of both sides, e) set the left side of the equation equal to the positive sqrt of the number on the right side  solve for x, and f)set the left side of the equation equal to the negative sqrt of the number on the right side  solve for x. I am stumped!!!
The equation is: x^ + 12x  64 = 0
Please help, Ellen
Click here to see answer by stanbon(69061) 
Question 148729: The problem is to solve the quadratic equation using the Indian method of multiplying each term in the equation by four times the coefficient of the
x sqrt 2 term.
The equation is: x^  2x  13 = 0
I am totally stumped. Please help.
Ellen
Click here to see answer by oscargut(2071) 
Question 148747: The problem is to solve the quadratic equation using the Indian method of multiplying each term in the equation by four times the coefficient of the x sqrt 2 term.
The equation is 2x^2  3x  5 = 0
This class is killing me. Please help
Ellen
Click here to see answer by mangopeeler07(462) 
Question 148748: Not sure if I submitted my last question right.
The problem is to solve the quadratic equation using the Indian method of multiplying each term in the equation by four times the coefficient of the x sqrt 2 term.
The equation is 4x^2  4x + 3 = 0
Please help
Ellen
Click here to see answer by jim_thompson5910(33401) 
Question 148923: I am having a terrible time solving this equation 4^2  4x = 3
It must be solved using the Indian method of first multiplying each term by 4. I have done that with the result of 16^2  16x = 12. The next step in this method is to add the square of the coefficient of the original x term to both sides, which results in 16^2  16x + 16 = 12 + 16. I have this correct, but cannot figure out how to complete the equation. How can I factor this equation, and then solve it.
I am pulling my hair out!
Ellen
Click here to see answer by mangopeeler07(462) 
Question 148903: 12. 6x +5x +7x
prime
(3x +1)(2x +1)
(2x +7)(3x +1)
x(6x +5x + 7)
13. 4x +14x 30
2(2x 3)(x +5)
2(2x 5)(x +3)
(4x 6)((x +5)
(2x 3)(2x +10)
14. 4x 8/(6x 12x)
(2x 2)/(3x 3x)
2/3
4/(6x)
2/(3x)
15. (3x 9)/(4x +20) . (x +3x 10)/(6x 12x)
3/4
(x 5)/(4(x +5))
(x 3)/(8x)
3/8
16. (x 4x 5)/(x +2x +1) (x 5)/(x +4)
(x 5)/((x +1)(x +4))
5
(x +1)(x +4)/(x +1)
(x +4)/(x +1)
17. Find the slope of a line passing through (4, 6) and (2, 5)
1/2
2
1/2
1/6
18. Find the equation of the line passing through (2, 4) and (3, 8)
4x +5y = 28
4x 5y = 12
5x +4y = 26
5x 4y = 6
19.
x +y = 2
3x 2y = 6
(1, 1)
(2,0)
Inconsistent
Dependent
20.
2x y = 8
x + 2y = 14
(6, 4)
(2, 4)
(0, 7)
(8, 3)
21.
x 2y = 12
x +3y = 2
(10, 1)
(0, 6)
(1, 1/3)
(8, 2)
22. 16x4y12
2xy
2xy
4xy6
4xy4
23. 2/12
1/6
6 /6
12 /6
3 /3
24.
The hypotenuse of a right triangle is 10. One side is 2 less than the other. Find the length of each leg.
3, 5
5, 7
8, 6
4, 6
25. x +7x +10 = 0
5, 2
5, 2
5, 2
2, 5
Click here to see answer by mangopeeler07(462) 
Question 149089: How do I put this word problem into a quadratic equation or set it up?
An express and local train leave Grays Lake at 3 P.M. and head for Chicago 50 miles away. The express travels twice as fast as the local, and arrives 1 hour ahead of it. Find the speed of each train.
I know that distance equals rate times time but on all else I am confused to say the least. Any info you can offer will be greatly appreciated.
Click here to see answer by ankor@dixienet.com(18980) 
Question 149102: I just don't know how to set this problem up. I need help!
Ely stands next to his cousin Teri. He shoots his bbgun at a straight horizontal angle. Teri records the time it takes from the moment Ely fires the bbgun until the sounds of the ping(the bb hitting the can) to return, .25 seconds. The distance is 20 yards. The speed of sound is 1140 ft per sec. How fast does the bb travel? Hos far did the bb fall? The equation he gave us h=16t^2+vt+h
Click here to see answer by solver91311(20879) 
Question 149101: I just don't know how to set this problem up. I need help!
Ely stands next to his cousin Teri. He shoots his bbgun at a straight horizontal angle. Teri records the time it takes from the moment Ely fires the bbgun until the sounds of the ping(the bb hitting the can) to return, .25 seconds. The distance is 20 yards. The speed of sound is 1140 ft per sec. How fast does the bb travel? Hos far did the bb fall? The equation he gave us h=16t^2+vt+h
Click here to see answer by ankor@dixienet.com(18980) 
Question 149203: I am supposed to set these up as an equation and solve I thought I had it but my answers look incorrect could you do it so that I can see what I did wrong? Thank you so much.
Joe has a collection of nickels and dimes that is worth $5.65. If the number of dimes were doubled and the number of nickels were increased by 8, the value of the coins would be $10.45. How many dimes does he have?
and
Walt made an extra $9000 last year from a parttime job. He invested part of the money at 9% and the rest at 8%. He made a total of $770 in interest. How much was invested at 8%?
Click here to see answer by nerdybill(7375) 

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