Questions on Algebra: Complex Numbers answered by real tutors!

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Question 149761: Please can someone help me with this problem: For i= -1, 3i(2+5i)= x+6i,then x=?
This is how i tried to solve the problem: 3ix2=6i,and 3ix5i=15i,now i combine 6i+ 15i = x + 6i, I broke down the problem by adding 6i + 15i= 21i=x+6i, then i made the 21i negative on both sides:
21i = x + 6i
-21i -21i= -15, is this correct?

Click here to see answer by ankor@dixie-net.com(15746)

Question 151531: Solve the equation by factoring.
6x^2-11x+2
Click here to see answer by jim_thompson5910(28717)

Question 151926: Please step me through dividing (3-i)/6i. thanks!
Click here to see answer by jim_thompson5910(28717)

Question 151967: 1. Using one of the laws of exponents, prove that any number raised to the power 0 is 1.
2. Using FOIL, simplify the expression "(3x + 2)(3x - 2)". Show that a particular factoring formula leads to the same answer.
3. If a fourth-degree polynomial is multiplied by a third-degree polynomial, what is the degree of the product? Explain your reasoning and provide examples to support your explanation.
4. Think of a condition under which the product of any two binomials is a binomial. You can support your answer with the help of one of the identities of factorization of polynomials.
5. (i) Is "12.5555…" a rational or irrational number? Explain.
(ii) Is "2.1273685…" a rational or irrational number? Explain.
(iii) Is "548/799" a rational or irrational number? Explain.
(iv) Simplify "(5 + 3i)(5 - 3i)". Is the result real, complex, or both? Explain.

Click here to see answer by stanbon(57977)

Question 152423: Please help with this problem
The complex numbers 2/5xi + 3 and -4 - 1/4yi are equal. Find the values of x and y
Have tried solving as a regular equation but cannot find equal values.
Click here to see answer by orca(409)

Question 152493: how would i write the complex # y= -2+2i in trig form?
Click here to see answer by Edwin McCravy(8999)

Question 152791: simplify these expressions
(3+2i)(3-2i)
8/-2i

Click here to see answer by orca(409)

Question 153145: If p is a multiple of 3 and q is a multiple of 5, which of the following is true?
A.pi/2pi
B.negative square root 144
C. 3.14
D. the square root of 8
Click here to see answer by stanbon(57977)

Question 153359: Cn you please help me solve this system of equations?
3x-y=5
2x-3y=-6
Click here to see answer by stanbon(57977)

Question 153378: -2(4-3x)+7=6(x+1)
solve for x
Click here to see answer by checkley77(12569)

Question 153396: 4x+7y=-5xy solve for y
Click here to see answer by orca(409)

Question 153470: Could please explain to me how to solve: h=-16t^2+21t+40
Click here to see answer by vleith(2825)

Question 153527: simplify each complex fraction; 1/x divided by 1-1/x-2 =
Click here to see answer by stanbon(57977)

Question 153392: 2/5x+1/6=3/10x+1/3 solve for x

Click here to see answer by sbarbagallo(4)

Question 153590: ..What is the total length of 32 pieces of copper wire, if each piece is 2 3/16 inches long?

... A women worked 7 1/2 hours per day for 14 days how many hours did she work?

.... Five and one-fourth dollars are to be divided among three boys. How many dollars will each receive?
.....Three hundred fifty pounds of sugar were poured into 4 3/8 pound packages. How many packages were filled?
0 solutions
Click here to see answer by ankor@dixie-net.com(15746)

Question 154211: (y+2)^2 = 20
solve for y my nephew and i both keep getting different answers
Click here to see answer by jim_thompson5910(28717)

Question 154388: (2x+y) + (3-5x)i = 1 -7i solve for x & y
I lumped the i's and the numbers together then squared everything to get
29x^2+4xy-104x+y^2-2y=-101
The answer is x=2 & y=-3, but I can't get there.
Click here to see answer by vleith(2825)

Question 154422: write the conjugate of the complex number 2+7i
Click here to see answer by jim_thompson5910(28717)

Question 154734: 2/3x-7=x
Click here to see answer by Alan3354(31532)

Question 154905: really I need help with classifying numbers it just didnt show it Idont understand were negative .75 would be classified as. I am not for sure if it is classified as a real raionl number and a integer or just a real and irrational number. please explain not just answer the questin because i need serious help I am so confused
Click here to see answer by stanbon(57977)

Question 154913: 43-3d=d+9
Click here to see answer by orca(409)

Question 155348: Please help me solve this. I need to put it in standard form then solve for x using the quadratic equation which should give me a complex number as an answer. The problem is:. Thanks.
Click here to see answer by checkley77(12569)

Question 155550: Please solve this operation for me:
Click here to see answer by stanbon(57977)

Question 155550: Please solve this operation for me:
Click here to see answer by checkley77(12569)

Question 156405: F=9/5C+32
Click here to see answer by Fombitz(13828)

Question 156403: P=2(l+w)

Click here to see answer by Fombitz(13828)

Question 156608: Evaluate the expression and write in the result of a+bi
(√(2)-√(-4))(√(3)-√(-6))
I foiled it and got √(6)+√(24)-2i√(12). I'm not sure if that's the wrong answer or if I need to go a step further. Please help.
Click here to see answer by solver91311(17077)

Question 157773: why is any number raised to the power of zero give an answerof 1?
Click here to see answer by jim_thompson5910(28717)

Question 158029: Hello =)
I really need help with this problem! If you could help me out that would be great!
DIRECTIONS: write the complex number is standard form

I hope i wrote that right. It's the quantity the squareroot of 2 over 2 plus the squareroot of 2 over 2 times i to the 4th power. I know how to solve it I think but I dont know how to put it in standard form??
Help me out please! Thank you!!!
Click here to see answer by jim_thompson5910(28717)

Question 158690: Find the values of x and y:
x+9i=y-yi
Click here to see answer by ankor@dixie-net.com(15746)

Question 158895: how to i make 273,000 into scientific notation
Click here to see answer by scott8148(6628)

Question 158897: Evaluate:
xy^2(xy-x^2) If x = -1/3 and y = 1/6
Click here to see answer by checkley77(12569)

Question 159315: Jambalaya is a Cajun dish made from chicken, sausage, and rice. Simone is making a large pot of jambalaya for a party. Chicken costs $6 per pound, sausage costs $3 per pound, and rice costs $1 per pound. She spends $42 on 13.5 pounds of food. She buys twice as much rice as sausage. How much chicken, sausage, and rice will she use in her dish?

Can someone please show me how to make this into 3 algebraic equations. I should be good from there. I would really appreciate it.
Click here to see answer by scott8148(6628)

Question 159314: Jonathon and members of his Spanish Club are going to Costa Rica over spring break. Before his trip, he purchases 10 travelers checks in denominations of $20, $50, and $100, totaling $370. He has twice as many $20 checks as $50 checks. How many of each type of denomination of travelers checks does he have?
I do not understand how to make this into 3 algebraic equations. If someone could just ezplain that, i would appreciate that.
Click here to see answer by scott8148(6628)

Question 159311: The sum of three numbers is 20. The second number is 4 times the first, and the sum of the first and third is 8. Find the numbers,
How do you make these equations?
Click here to see answer by scott8148(6628)

Question 159310: Campus Rentals rents 2 and 3 bedroom apartments for $700 and $900 per month respectively. Last month they had six vacant apartments and reported $4600 in lost rent. How many of each type of apartment were vacant?
Can someone please explain to me how to make this into equations?
Click here to see answer by scott8148(6628)

Question 159554: Find all roots of the equation x^3+8=0; put them in rectangular form.
Click here to see answer by nabla(475)

Question 159623: A food store makes a 9-lb mixture of peanuts, cashews, and raisins. Peanuts cost $1.50 per pound, cashews cost $2.00 per pound, and raisins cost $1.00 per pound. The mixture calls for twice as much peanuts than cashews. The total cost of the mixture is $13.00. How much of each ingredient did the store use?

I am really confused with this problem.
Click here to see answer by scott8148(6628)

Question 159832: Hi, Can you please help with imaginary numbers?
.
Simplify
.

.
Put in complex number form
.
Thanks ahead of time, Levi
Click here to see answer by jim_thompson5910(28717)

Question 160204: i am unsure of how to cube a simple complex number, please help! :
Click here to see answer by Edwin McCravy(8999)

Question 160310: 2-i / 3-4i ,2-i/3-4i*3+4i/3+4i, 6+8i_3i_4i^2/15 ,10+5i/15 ,5(2+i)/5(3), 2/3 + 1/3i

Click here to see answer by nerdybill(7008)

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