Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 745156: Solve the following system of equations:
9x+5y=-4
-8x+3y=7
Click here to see answer by kekegeter (97)

Question 745503: 7/12y-1/4=2y-5/3
Click here to see answer by kekegeter (97)

Question 747068: tell whether the ordered pair is a solution of the equation.

y=6x-7;(2,5)
Click here to see answer by rfer(16322)

Question 747063: how do you show work for sovling y=x2-2
Click here to see answer by mikeebsc(26)

Question 747084: Solve: x3-x2=0 honestly lost..

Click here to see answer by lenny460(1073)

Question 747284: answer to the following question: -8(4+9x)=7(-2-11x)
Click here to see answer by tommyt3rd(5050)

Question 747344: exact value of cos(pi/6)
Click here to see answer by jim_thompson5910(35256)

Question 747202: two railway stations are at a distance of 98 km from each other.one train cover this distance in 40 minutes less than the other.the speed of the first train is 12 km/h faster than than the second.determine the speeds of both the trains.
Click here to see answer by ankor@dixie-net.com(22740)

Question 747270: The equation for voltage dividers in electronics stated in basic algebraic terms is:
x=y(b/(a+b))
As a and b represent resistor values I have the equations to solve for each of them. I have been able to figure out the steps to calculate for a, however, the steps to arrive at the formula for b has eluded me. The formula given is:
b=(xa)/(y-x)
I suppose I could just memorize the formula but I think I must be missing something very basic that I cannot work out the steps myself. Your help would be much appreciated. Glenn
Click here to see answer by rothauserc(4718)

Question 747404: What is the step by step process to factor this equation using substitution?
(y-2)^2+5(y-2)-36
Click here to see answer by kekegeter (97)

Question 747404: What is the step by step process to factor this equation using substitution?
(y-2)^2+5(y-2)-36
Click here to see answer by MathTherapy(10552)

Question 745452: 72y2 - 50x2
Click here to see answer by kekegeter (97)

Question 745452: 72y2 - 50x2
Click here to see answer by MathTherapy(10552)

Question 747439: 2x-3/5=7
Solve wat is x=?
Click here to see answer by unlockmath(1688)

Question 747452: How to solve 3x-11+4(x+8)<0
Click here to see answer by checkley79(3341)

Question 747493: I hit a block learning from a prep book. I can't seem to find the right order of operation. Is there anyway the following problems could be explained to me?
2x +3 (4x +5)= 1

x-5= 4x+19
4x-5= 2x +17
-4x+8= 2x-16
16+2x =4x-8
Click here to see answer by rothauserc(4718)

Question 747637: Solve the following system of equations:
x �2y+z=6
2x+y �3z= �3
x �3y+3z=10
Please ahow me the steps in order to understand it.
Thank you
Click here to see answer by Alan3354(69443)

Question 747630: When two numbers x and y are added together, the sum is 52. y is 3 times larger than x. Find y.
Click here to see answer by Alan3354(69443)

Question 747587: Hello, if you could please give me the step-by-step solution to the following question I'd be very grateful, thanks:
A circle has a radius of x. A trapezium has (top and bottom) sides of length x+2 and 7, the perpendicular height is πx. They have the same area. What is the value of x?
So, πx^2=(x+9)/2*πx
Click here to see answer by KMST(5328)

Question 747670: Solve the following system of equation

x�3y+3z = 10
2x+ y�3z = �3
x�2y+ z = 6
Click here to see answer by Edwin McCravy(20055)

Question 747669: Solve the following system of equation

x�3y+3z = 10
2x+ y�3z = �3
x�2y+ z = 6
Click here to see answer by Edwin McCravy(20055)

Question 747668: Solve the following system of equation

x�3y+3z = 10
2x+ y�3z = �3
x�2y+ z = 6
Click here to see answer by Edwin McCravy(20055)

Question 747729: the price of an article in june was Rs 400.it was increased by 20% in august and then decreased by 10% of augusts price in december,find the price in december
Click here to see answer by Cromlix(4381)

Question 747772: how do I solve:
x2+5=30 and
x2+x+30
Please tell me the answers A.S.A.P
Click here to see answer by Alan3354(69443)

Question 747772: how do I solve:
x2+5=30 and
x2+x+30
Please tell me the answers A.S.A.P
Click here to see answer by stanbon(75887)

Question 747775: in recent years, Atlanta hit 197 home runs and allowed 120. Find its home-run differential
Click here to see answer by Alan3354(69443)

Question 747846: The length of a rectangle is 2 in. more than twice its width. If the perimeter of the rectangle is 28 in., find the width of the rectangle.
Click here to see answer by Cromlix(4381)

Question 747915: Please please help!!! I don't understand this.
Zelda, a resident of Metropolis, pays Metropolis an annual tax of $55 plus 1.3% of her annual income. If Zelda paid $1,121 in tax, what was Zelda�s income?
Click here to see answer by rfer(16322)

Question 747936: I am stuck:
(x-2)^3=24
x^3-2^3=24
x^3-8=24
x^3=32
x=sqrt(32)
Is this correct?
Click here to see answer by stanbon(75887)

Question 747962: x/6+x/5=7/6
Click here to see answer by FrankM(1040)

Question 747962: x/6+x/5=7/6
Click here to see answer by tommyt3rd(5050)

Question 747486: x-5/3=x-3/5
Click here to see answer by tommyt3rd(5050)

Question 748144: 6-1/5y less than or equal to 7

solving multistep inequalities..(computer not unable to type a less than sign with the line under it to accurately depict the equation)
Click here to see answer by stanbon(75887)

Question 748176: 4x-25=15 what does x equal
Click here to see answer by kibauu(44)

Question 748335: k/5-3=12

Click here to see answer by tommyt3rd(5050)

Question 748434: What is the value of z in 13=-z+4
Click here to see answer by MathLover1(20849)

Question 748433: What is the value of x in the equation 4.3x=41.28.
Click here to see answer by MathLover1(20849)

Question 748499: 2(a+6)+5
Click here to see answer by lenny460(1073)

Question 748579: Robin has 21 books on computers. She donates z of them to the school library. How many does she have left?
Click here to see answer by timvanswearingen(106)

Question 748579: Robin has 21 books on computers. She donates z of them to the school library. How many does she have left?
Click here to see answer by Cromlix(4381)

Question 748578: A lodge paid $1853 for tickets for x members to visit the states Capitol. Find the cost of 1 ticket.
Click here to see answer by Cromlix(4381)

Question 748585: If 3m−3 + 3m−3 = 18, what is the value of m?
Click here to see answer by Cromlix(4381)

Question 748576: A market is paid $172 for x crates of berries. Find the cost of 1 crate of berries.
Click here to see answer by Cromlix(4381)

Question 748708: Is 4z equal to z+z+z+z or 4 times z
Click here to see answer by stanbon(75887)

Question 748708: Is 4z equal to z+z+z+z or 4 times z
Click here to see answer by Alan3354(69443)

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