Questions on Algebra: Complex Numbers answered by real tutors!

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Question 1052720: . Evaluate sqrt(7x) (sqrt(x) -7 sqrt(7)) Show your work.
Click here to see answer by ewatrrr(24785)

Question 1053544: the ages of 3 sisters are consecutive odd integers. if the sum of thier ages is 75, find the ages of the oldest sister
Click here to see answer by Alan3354(69443)

Question 1053578: Suppose that x and y vary inversely, and x = 2 when y = 7. Write the function that models the inverse variation.
A.y=5/x

B.y=14/x

C.y=9/x

D.
y = 3.5x
Click here to see answer by ewatrrr(24785)

Question 1053638: write the polynomial function in standard form with the given roots. x = -1, -4, 2i and -2i
Click here to see answer by stanbon(75887)

Question 1053845: Demonstrate the associative property of complex numbers using
(3+4i)+(2-5i)+(6-3i)
Click here to see answer by rothauserc(4718)

Question 1053882: A 132 lb person on a steadily rotating Ferris wheel has an apparent weight which is 18.0 percent less than their actual weight when they are at the top of the Ferris wheel. What is the person's apparent weight ( in pounds) at the lowest point?
Click here to see answer by ikleyn(52750)

Question 1053892: (r-(6/(r^(2)-1)))/(1/(r-3))
Click here to see answer by Alan3354(69443)

Question 1053892: (r-(6/(r^(2)-1)))/(1/(r-3))
Click here to see answer by MathTherapy(10549)

Question 1053881: A 5800 lb airplane loops at a speed of 250 mi/hr. If the radius of the loop is 2800 ft, find the lift on the plane (in pounds) at the bottom of this loop.
Click here to see answer by ikleyn(52750)

Question 1053883: A 970 kg car rolls down a very long 16 degree incline. The drag force for the motion of the car has the form F = 150 + 1.8 v^2 (in S.I. units). What is the terminal velocity for the car rolling down this incline?
Click here to see answer by ikleyn(52750)

Question 1053970: i = a^2 - b^2 + 2abi
Click here to see answer by ikleyn(52750)

Question 1054209: Z^2 -(1+3i)z + (-2+2i)=0
-2i is a root and find the other?
I used the quadratic formula but it doesn't work out.
Answer should be 1+i
Thanks
Click here to see answer by ikleyn(52750)

Question 1054268: please help solve these type of problems. p(x)=x^4-x^3+10x^2-9x+9
Click here to see answer by Alan3354(69443)

Question 1054268: please help solve these type of problems. p(x)=x^4-x^3+10x^2-9x+9
Click here to see answer by ikleyn(52750)

Question 1054359: Find a formula for z/w if z=a+bi and w= c+di.

Click here to see answer by Fombitz(32388)

Question 1054360: Perform the division (7+i)/(1-2i) by finding the reciprocal of 1-2i and multipliying. Then perform the division by the method of the lesson.
Click here to see answer by Fombitz(32388)

Question 1054375: Please, I need help solving -5+i/2i
Click here to see answer by Fombitz(32388)

Question 1054375: Please, I need help solving -5+i/2i
Click here to see answer by MathTherapy(10549)

Question 1054569: "change z=-4+4i to polar form" help?
Click here to see answer by ikleyn(52750)

Question 1054569: "change z=-4+4i to polar form" help?
Click here to see answer by rothauserc(4718)

Question 1054562: find real numbers a and b such that the equation is true (a+3)+8bi=3-3i
Click here to see answer by ikleyn(52750)

Question 1054946: Let a*b=(-1)^ab
Let c#d=(c)^d^2
Compute
(5*-3)+(2#-2)
Click here to see answer by Alan3354(69443)

Question 1055296: (-4-1i)+(2-5i)
Click here to see answer by Fombitz(32388)

Question 1055612: -6x+7yi=18+28i
Click here to see answer by ikleyn(52750)

Question 1055627: find Re(z1z2/z1) and Im(1/z1z2) if z1=2-i,z2=-2+i
Click here to see answer by ikleyn(52750)

Question 1055626: express -1+i/sqrt2 in polar form?

Click here to see answer by ikleyn(52750)

Question 1056078: Solve each formula for the specified variable
d=2S/n(a+L) for a
Click here to see answer by stanbon(75887)

Question 1056078: Solve each formula for the specified variable
d=2S/n(a+L) for a
Click here to see answer by MathTherapy(10549)

Question 1056112: What is this in a+bi format? i/7+i
Click here to see answer by Alan3354(69443)

Question 1056154: I have to rewrite without parenthesis and simplify answer as much as possible.
-8xy^6(4x^3+3X^4y^5-5y^5).

As a result I have -32*x^4*y^6-24*x^5*y^11+40*x*y^11. Is this correct or can I simplify further?
Click here to see answer by jim_thompson5910(35256)

Question 1056347: Write two complex numbers with the product of 20.
Click here to see answer by Fombitz(32388)

Question 1056393: Complex Number: Solve the equation 2x^2 + 2 = 0.
Click here to see answer by ikleyn(52750)

Question 1056784: The denominator of a fraction is two more than twice the numerator. If both numerator and denominator are decreased by eight, the simplified result is
2/9
Find the original fraction
Click here to see answer by ankor@dixie-net.com(22740)

Question 1056814: If (3x-4y)+i(x+y)=7 {find x,y}
Click here to see answer by ikleyn(52750)

Question 1056863: An electron of mass 9.1E-31 kg is released from rest at a distance of 3.3 E-10 m from a fixed electron. The force on the movable electron is given by the function F = 2.3E-28/r^2, where r is the distance between the electrons. Find the maximum velocity (in meters/second) of the moving electron after release.

Click here to see answer by rothauserc(4718)

Question 1056859: A nuclear reactor generating plant supplies 15.0 MW of useful power steadily for a year. Assuming that, in addition, twice this power is wasted in heat production, determine the mass (in kilograms) converted to energy in a year at this plant.

Click here to see answer by Alan3354(69443)

Question 1056858: A 1.60 kg block collides with a horizontal weightless spring of force constant 1.30 N/m. The block compresses the spring 4.00 m from the rest position. Assuming that the coefficient of kinetic friction between the block and the horizontal surface is 0.240 , what was the speed of the block (in meters/second) at the instant of collision?

Click here to see answer by ikleyn(52750)

Question 1056860: A potential function is given by U(x) = 15 x^2. What will be the acceleration (in meters/second ^2) of a 2.00 kg mass, when it is at the position x = 0.300 m?

Click here to see answer by ikleyn(52750)

Question 1056857: A 2.80 kg block is dropped onto a spring from a height of 0.830 m above the top of the spring, which has a force constant k = 1570 N/m. Find the maximum distance (in meters) the spring will be compressed (neglecting friction).

Click here to see answer by ikleyn(52750)

Question 1056856: What power (in horsepower) is developed by a grinding machine whose wheel has a radius of 8.10 in and runs at 7.20 rev/s, when the tool to be sharpened is held against the wheel with a force of 47.0 lb? The coefficient of friction between the tool and the wheel is 0.310 .

Click here to see answer by ikleyn(52750)

Question 1056854: A 2.70 kg block moves in a straight line on a horizontal frictionless surface under the influence of a force that varies with position as F = 3x^2 - 2x. If the block's speed passing through the origin was 2.80 m/s, with what speed (in meters/second) does it pass the point x = 8.00 m?

Click here to see answer by ikleyn(52750)

Question 1056853: A block of mass 4.62 kg is drawn at constant speed a distance of 1.78 m along a horizontal floor by a rope exerting a constant force of magnitude 1.24 N and making an angle of 11.0 degrees above the horizontal. Compute the coefficient of friction between the block and the floor.

Click here to see answer by ikleyn(52750)

Question 1056855: A mass of 0.675 kg, on a frictionless table, is attached to a string which passes through a hole in the table. The hole is at the center of a horizontal circle in which the mass moves with constant speed. The radius of the circle is 0.530 m and the speed of the mass is 12.0 m/s. It is found that drawing the string down through the hole and reducing the radius of the circle to 0.370 m has the effect of multiplying the original tension in the string by 4.63. Compute the total work (in joules) done by the string on the revolving mass during the reduction of the radius.

Click here to see answer by ikleyn(52750)

Question 1056927: write the given equation in form a+bi A)by writing the numbers in trigonometric form, and B) by using the conjugate of the denominator.
3i/-4i
Thank you so much!
Click here to see answer by rothauserc(4718)

Question 1056926: write the given equation in form a+bi A)by writing the numbers in trigonometric form, and B) by using the conjugate of the denominator.

Thank you so much!
Click here to see answer by ikleyn(52750)

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