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Tutors Answer Your Questions about Complex numbers (FREE)
Question 170747: I need some help with this problem.
i asked my friend to help me with a previous problem and he ended up just giving me the answer cause i still don't get it.
The one already answered ==
"":How i tried to work it out.
[]:my answer
1. 
"2(x+6)(x-1)"
[x=6,(-1)]
Was that correct?
2. 
?????
Please help me.
: I need some help with this problem.
i asked my friend to help me with a previous problem and he ended up just giving me the answer cause i still don't get it.
The one already answered ==
"":How i tried to work it out.
[]:my answer
1.
"2(x+6)(x-1)"
[x=6,(-1)]
Was that correct?
2.
?????
Please help me.
Click here to see answer by Mathtut(552)  |
Question 168915: please help me i dont understand any of this i am supposed to take algebra 2 next year this is is my problem
 i need this in vertex form with the work and steps so i can understand it thank you: please help me i dont understand any of this i am supposed to take algebra 2 next year this is is my problem
i need this in vertex form with the work and steps so i can understand it thank you
Click here to see answer by scott8148(2760) |
Question 168291: find additional zeros for a function with degree 5 and the following zeros 2,
-i, 1+i: find additional zeros for a function with degree 5 and the following zeros 2,
-i, 1+i
Click here to see answer by Fombitz(1756) |
Question 168321: Any help with the folllowing assignment question would be most appreciated. I am doing an electrical degree course which is moving too fast over the quantitative analysis section and I am struggling to take basics for each topic.
two coils connected in parrallel
r1= 12 ohm L1= 24mH
r2= 6 ohm L2=30mH
given that f = 50Hz calculate the values of impedance for each coil Z1 and Z2 and the total impednace for two impedances in parrallel in both polar form and rectilinear form.
thanks
Kevin
: Any help with the folllowing assignment question would be most appreciated. I am doing an electrical degree course which is moving too fast over the quantitative analysis section and I am struggling to take basics for each topic.
two coils connected in parrallel
r1= 12 ohm L1= 24mH
r2= 6 ohm L2=30mH
given that f = 50Hz calculate the values of impedance for each coil Z1 and Z2 and the total impednace for two impedances in parrallel in both polar form and rectilinear form.
thanks
Kevin
Click here to see answer by Alan3354(1439) |
Question 168106: i am struggling with solving complex equations for x and y:
such as 3(x+jy)=9-j27
this if for an electrical degree course, quantitative analysis assignment.
Hopeing someone can explain so i can solve the rest of the problems as course is very fast meaning things are being brushed over very fast and it is an awful long time since i done anything of this level.
Regards
Kevin : i am struggling with solving complex equations for x and y:
such as 3(x+jy)=9-j27
this if for an electrical degree course, quantitative analysis assignment.
Hopeing someone can explain so i can solve the rest of the problems as course is very fast meaning things are being brushed over very fast and it is an awful long time since i done anything of this level.
Regards
Kevin
Click here to see answer by oscargut(667)  |
Question 167782: This is another question from a past Algebra & Complex Numbers paper which I am practicing for study for my Calculus exam. The question is apparently worth an excellence mark:
QUESTION EIGHT
Find the equation of the locus of the point representing z if |z-3i|-|z+3i|=2.
I can work it out as far as:
|z-3i|-|z+3i|=2
(z=x+iy) => |x+i(y-3)|-|x+i(y+3)|=2
(|z|= ) =>  - =2
 - =2
but after that I get stuck.
Help appreciated.: This is another question from a past Algebra & Complex Numbers paper which I am practicing for study for my Calculus exam. The question is apparently worth an excellence mark:
QUESTION EIGHT
Find the equation of the locus of the point representing z if |z-3i|-|z+3i|=2.
I can work it out as far as:
|z-3i|-|z+3i|=2
(z=x+iy) => |x+i(y-3)|-|x+i(y+3)|=2
(|z|=) => -=2
-=2
but after that I get stuck.
Help appreciated.
Click here to see answer by oscargut(667) |
Question 167398: PLEASE HELP!!! MUST SHOW WORK.
1. simplify: 4xy^3/z^2 / (8x^2y/z^3)^2
2. Simplify d/d^2-9+5/2d+6
Thanks: PLEASE HELP!!! MUST SHOW WORK.
1. simplify: 4xy^3/z^2 / (8x^2y/z^3)^2
2. Simplify d/d^2-9+5/2d+6
Thanks
Click here to see answer by ankor@dixie-net.com(4535) |
Question 167397: I'm not sure if this is the right section, but will someone please help me.
Find the exact solutions of the system of equations x^2+2y^2=18 and x=2y.
I have to show all my work and I don't know how to do this.
PLEASE HELP!!!!
Thanks: I'm not sure if this is the right section, but will someone please help me.
Find the exact solutions of the system of equations x^2+2y^2=18 and x=2y.
I have to show all my work and I don't know how to do this.
PLEASE HELP!!!!
Thanks
Click here to see answer by gonzo(474) |
Question 167397: I'm not sure if this is the right section, but will someone please help me.
Find the exact solutions of the system of equations x^2+2y^2=18 and x=2y.
I have to show all my work and I don't know how to do this.
PLEASE HELP!!!!
Thanks: I'm not sure if this is the right section, but will someone please help me.
Find the exact solutions of the system of equations x^2+2y^2=18 and x=2y.
I have to show all my work and I don't know how to do this.
PLEASE HELP!!!!
Thanks
Click here to see answer by Fombitz(1756) |
Question 166314: If a complex equation is graphed on a plane and the solution point is on the r or i line (such as 0+8i) is it considered real or imaginary?: If a complex equation is graphed on a plane and the solution point is on the r or i line (such as 0+8i) is it considered real or imaginary?
Click here to see answer by stanbon(19007) |
Question 166032: can someone help me with this problem:
Solve the problem.
If the average cost per unit C(x) to produce x units of plywood is given by:
C(x) = 900 / x+30
What do 600 units cost? Round your answer to the nearest cent.
a. $857.14
b. $899.95
c. $180.00
d. $18,000.00: can someone help me with this problem:
Solve the problem.
If the average cost per unit C(x) to produce x units of plywood is given by:
C(x) = 900 / x+30
What do 600 units cost? Round your answer to the nearest cent.
a. $857.14
b. $899.95
c. $180.00
d. $18,000.00
Click here to see answer by ankor@dixie-net.com(4535) |
Question 166180: I'm not sure if this is the right section, but I will still ask.
1. Use synthetic division to find f(-3) for f(x)2x^3-6x^2-5x+7.
2. One factor of f(x)=x^3+x^2-22x-40 is x+4. Find the other factors.
I must show my work and have no textbook to explain. Will you PLEASE HELP!!!!
Thanks: I'm not sure if this is the right section, but I will still ask.
1. Use synthetic division to find f(-3) for f(x)2x^3-6x^2-5x+7.
2. One factor of f(x)=x^3+x^2-22x-40 is x+4. Find the other factors.
I must show my work and have no textbook to explain. Will you PLEASE HELP!!!!
Thanks
Click here to see answer by Fombitz(1756) |
Question 166065: can someone please help me with this:
Solve the problem.
If the average cost per unit C(x) to produce x units of plywood is given by:
C(x) = 900 / x+30
What do 600 units cost? Round your answer to the nearest cent.
a. $857.14
b. $899.95
c. $180.00
d. $18,000.00: can someone please help me with this:
Solve the problem.
If the average cost per unit C(x) to produce x units of plywood is given by:
C(x) = 900 / x+30
What do 600 units cost? Round your answer to the nearest cent.
a. $857.14
b. $899.95
c. $180.00
d. $18,000.00
Click here to see answer by oscargut(667) |
Question 149554: Please help me write 3(cos 60 degrees + i sin 60 degrees) in the form of a + bi!
Thank you, Tami: Please help me write 3(cos 60 degrees + i sin 60 degrees) in the form of a + bi!
Thank you, Tami
Click here to see answer by Alan3354(1439) |
Question 165756: An NFL kicker attempts a 41-yard field goal. The path of the football toward the uprights can be represented by the graph of the quadratic function f(x)= -.0625x²+2.7x, where x is the horizontal distance the football travels in yards and f(x) is the vertical distance the football travels. The bottom of the upright is 3.5 yards above the ground.
Assuming the kick is in between the uprights, did the kicker make the field goal? Why or Why not?: An NFL kicker attempts a 41-yard field goal. The path of the football toward the uprights can be represented by the graph of the quadratic function f(x)= -.0625x²+2.7x, where x is the horizontal distance the football travels in yards and f(x) is the vertical distance the football travels. The bottom of the upright is 3.5 yards above the ground.
Assuming the kick is in between the uprights, did the kicker make the field goal? Why or Why not?
Click here to see answer by ankor@dixie-net.com(4535) |
Question 165734: I'm not sure if this is the right section, but I really need help.
Find: p(-3) if p(x)=x^5+3x^2
What I did was put -3 in for all x's and came up with the answer of 270.
I'm not sure if I did this right. Can you please help. If it's not right will you please show me what I did worng.
Thanks: I'm not sure if this is the right section, but I really need help.
Find: p(-3) if p(x)=x^5+3x^2
What I did was put -3 in for all x's and came up with the answer of 270.
I'm not sure if I did this right. Can you please help. If it's not right will you please show me what I did worng.
Thanks
Click here to see answer by ptaylor(1332) |
Question 165732: Please help. This is from a worksheet and we have no textbook to help us.
Simplify. Assume that no denominator equals 0.
8y^3+27/2xy-10y+3x-15
I must show my work and I don't understand how to do it.
Thanks.: Please help. This is from a worksheet and we have no textbook to help us.
Simplify. Assume that no denominator equals 0.
8y^3+27/2xy-10y+3x-15
I must show my work and I don't understand how to do it.
Thanks.
Click here to see answer by jim_thompson5910(9390) |
Question 165646: Thank You so much that really helped me out but can you help me with one more??
-9i(2-i): Thank You so much that really helped me out but can you help me with one more??
-9i(2-i)
Click here to see answer by jim_thompson5910(9390) |
Question 165600: Given 5x^4-3x^3+ax^2+bx-7 determine a and b so i is a zero of the quartic (Hint:Use synthetic or long division). Please help me, I just can't find the answer!!!: Given 5x^4-3x^3+ax^2+bx-7 determine a and b so i is a zero of the quartic (Hint:Use synthetic or long division). Please help me, I just can't find the answer!!!
Click here to see answer by oscargut(667) |
Question 165510: The shape of a supporting arch can be modeled by h(x)=-0.03x^2+3x, where h(x) represents the height of the arch and x represents the horizontal distance from one end of the base of the arch in meters. Find the maximum height of the arch. Show work.
Thanks: The shape of a supporting arch can be modeled by h(x)=-0.03x^2+3x, where h(x) represents the height of the arch and x represents the horizontal distance from one end of the base of the arch in meters. Find the maximum height of the arch. Show work.
Thanks
Click here to see answer by ankor@dixie-net.com(4535) |
Question 165512: This is from a worksheet.
Must show work.
Solve x^2-2x=24 by factoring.
Please help
Thanks: This is from a worksheet.
Must show work.
Solve x^2-2x=24 by factoring.
Please help
Thanks
Click here to see answer by vleith(1174) |
Question 165401: Below are the equations that I need assistance with...
1. 2x+y-3z=-4
2. 4x-2y+z=9
3. 3x+5y-3z=5
Below are the instructions to solving the problems. I am supposed to solve for x, y, and z. The answer should be the same for x, y, and z in all three equations. For instance, if x is 2, y is 5, and z is 3 in problem #1, the answer should be the same for the last two problems. My professor explained this to me, but when I tried to solve it, I did not receive the correct answer. Please help me. I would really appreciate it. I need this answer for my class as soon as possible...
1.Choose two of the three equations so that one of the variables is eliminated (use addition method).
2.Repeat step one with two different equations to eliminate the same variable.
3.Use the equation resulting from steps 1 & 2 to solve for one of the variables.
4.Substitute the variable in step 3 into equation to solve for a second variable.
5.Substitute the values from steps 3&4 into equations 1, 2, or 3 to solve for the final variable.: Below are the equations that I need assistance with...
1. 2x+y-3z=-4
2. 4x-2y+z=9
3. 3x+5y-3z=5
Below are the instructions to solving the problems. I am supposed to solve for x, y, and z. The answer should be the same for x, y, and z in all three equations. For instance, if x is 2, y is 5, and z is 3 in problem #1, the answer should be the same for the last two problems. My professor explained this to me, but when I tried to solve it, I did not receive the correct answer. Please help me. I would really appreciate it. I need this answer for my class as soon as possible...
1.Choose two of the three equations so that one of the variables is eliminated (use addition method).
2.Repeat step one with two different equations to eliminate the same variable.
3.Use the equation resulting from steps 1 & 2 to solve for one of the variables.
4.Substitute the variable in step 3 into equation to solve for a second variable.
5.Substitute the values from steps 3&4 into equations 1, 2, or 3 to solve for the final variable.
Click here to see answer by Alan3354(1439) |
Question 165291: f(x)=4x^3-3x^2+2x-1. Find f(1+2i). Please help me out, I really don't have any idea on what to do!!!: f(x)=4x^3-3x^2+2x-1. Find f(1+2i). Please help me out, I really don't have any idea on what to do!!!
Click here to see answer by jim_thompson5910(9390) |
Question 164326This question is from textbook Algebra 2
: I'm trying to help my child with complex numbers, I have read the book and still stuck on how they're getting the answer...This question is from textbook Algebra 2
: I'm trying to help my child with complex numbers, I have read the book and still stuck on how they're getting the answer...
Click here to see answer by Fombitz(1756) |
Question 164225: express each complex # in the form a+bi
1. sqrt of (-50) - sqrt of (-8)
Please help me understand this problem.: express each complex # in the form a+bi
1. sqrt of (-50) - sqrt of (-8)
Please help me understand this problem.
Click here to see answer by jim_thompson5910(9390) |
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