Questions on Algebra: Systems of Linear Equations answered by real tutors!

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Question 995514: Suppose f(x)=ax^4+bx^2+x+5, where a and b are constants. Find f(4) if f(-4)=3
Click here to see answer by ikleyn(52782)

Question 995715: The sum of 3 consecutive multiples of is 333. Find the multiples

Click here to see answer by stanbon(75887)

Question 995870: 5x + 7y + 8z = 20
8x + 3y + 10z = 70
9x + 4y + 9z = 80
I need system solution for the above system of equations by using Gaussian Elimination Method. Thanking you in anticipation.
Click here to see answer by Edwin McCravy(20055)

Question 996047: Which ordered pair is a solution to the linear inequality below?
3x-5yis greater than or equal to 10
A. (1,4)
B. (6, -3)
C. (-5, -2)
D. (2, 0)
Click here to see answer by jim_thompson5910(35256)

Question 996145: 3x + 2 � 5 = x - 1 � 4
Can you please also enter each step
Thankyou
Click here to see answer by Alan3354(69443)

Question 996656: 3x divided by 7 equal 1/2
Click here to see answer by farohw(175)

Question 996656: 3x divided by 7 equal 1/2
Click here to see answer by MathTherapy(10552)

Question 996862: Given the following system of equations
x+y=5k
2x=4k
where k is a constant real number, solve the system for (x,y)in terms of k.
Do not replace the constant k with a numerical value.
Give your solution as an ordered pair in terms of k.

Click here to see answer by rfer(16322)

Question 997125: 4x+5y=140
3x-5y=105
Click here to see answer by phillywily(18)

Question 997474: 5. What are the values of a and b so that y = ax + b is parallel to the x-axis and passes through the point ( 2, 3)?
Click here to see answer by josgarithmetic(39617)

Question 997480: Find the value of k so that the graphs of 5y + kx = 3 and 7x - 24y = 15 are perpendicular.
Click here to see answer by josgarithmetic(39617)

Question 997590: Each fruit basket comes with A apple, P pears, and B bananas. Wendi orders four fruit baskets and gets 84 pieces of fruit. Write an equation that represents this order.
I have tried many things but they never work could you please help me understand this better.
Click here to see answer by fractalier(6550)

Question 997711: (2x+6y=20)
(x+ay=b)
this a system of equations so how do I get a and b
Click here to see answer by rothauserc(4718)

Question 997835: The sum of the digits of a two digit number is 7. When the digits are reversed the value of the number increased by 27. Find the number

Click here to see answer by fractalier(6550)

Question 997942: 4x-2y=6
I need to find the y in a table
X has -2 -1 0 1 2 how do I find the y
Click here to see answer by MathLover1(20850)

Question 998178: What is x-2y=-10
Click here to see answer by solver91311(24713)

Question 998257: Solve system of 3 equations:
15x-25y+z+10=0
30x-50y+2z+20=0
90x-150y+6z+60=0
Can you show steps by steps
Click here to see answer by Alan3354(69443)

Question 998350: Hi, I missed school and need some help with HW. Ok heres the problem-- May rides her bike the same distance that Leah walks. May rides her bike 10 km/h faster than Leah walks. If it takes may 1 hour and leah 3 hours to travel that distance, how far does each travel? (*I need to write and solve an equation*) Thanks! -R
Click here to see answer by stanbon(75887)

Question 998563: the sum of two consecutive even integers is at least 108.
Click here to see answer by fractalier(6550)

Question 998575: Given; 2x+6(x-3)=150
Prove: x=21
Click here to see answer by fractalier(6550)

Question 998652: (8x+7y)(3x-5y)-(x-3y)(2x-3y)
Click here to see answer by Cromlix(4381)

Question 998683: 27x^3+y^3=35; xy=2; find 3x+y
Click here to see answer by ikleyn(52782)

Question 998906: The sum of two numbers is 15. One number is 4 times the other. Find the numbers
Click here to see answer by Alan3354(69443)

Question 998922: I need help. the question tells me to graph each equation and I tried to put the equation into standard form but when I did the table came out wrong I don't know how to put the equation into standard form so that it will work out the equation is if you want to see my work so far my email is paigecute1234@gmail.com, thanks for the help!
Click here to see answer by rothauserc(4718)

Question 998985: I need some help with this problem:
4/3x+3/2y=-4/3
-16/9x-2y=16/9
I'm using the addition/elimination method.
I just don't know what to multiply to the top equation
to make one of the variables cancel out. please help me.
Click here to see answer by ikleyn(52782)

Question 999071: i need help with this problem please:
4x+4y=8
2x+y=2
another elimation/addition systems of equations problem.
i just dont know what to multiply to the first equation to make the variables. im having issues with that. help.
Click here to see answer by Alan3354(69443)

Question 999081: 5x=3(1-y)
3x+3y+1=0

Click here to see answer by stanbon(75887)

Question 999077: 5x=3(1-y)
3x+3y+1=0

Click here to see answer by fractalier(6550)

Question 999090: i want to make sure got this question right:
the problem is y=6x+2, y=6x+27
i have to do addition/elimnation
and the answer i got was 0=29 or no solution
and also did i rewrite the equations correctly? 6x+y=2 6x+y=27

Click here to see answer by fractalier(6550)

Question 999101: im sorry i have one more question:
did i get this right? the problem was:-1.5x+0.3y=-7.2, 3x-0.6y=14.4
once more i had addition/elimination method. heres what i got, 0=-43.2 or
no solution
Click here to see answer by Theo(13342)

Question 999145: Solve using addition method
x+3y+z=6
3x+y-z=-2
2x+2y-z=1
Click here to see answer by Alan3354(69443)

Question 999136: Solve using the addition method:
3x+4y=25
2x+y=!0
Click here to see answer by Alan3354(69443)

Question 999164: Suppose that the market demand in a perfectly competitive industry is given by Qd=70,000-5000P, and the market supply function is Qs=40,000+2500P given in dollors. the market equilibrium price will be
Click here to see answer by mathmate(429)

Question 999246: For thousands of years, gold has been considered one of the Earth's most precious metals. One hundred percent pure gold is 24 karat gold, which is too soft to be made into jewelry. Most gold jewelry is 14-karat gold, approximately 58% gold. If 18-karat gold is 75% gold and 12-karat gold is 50% gold, how much of each should be used to make a 14-karat gold bracelet weighing 300 grams?

Click here to see answer by mananth(16946)

Question 999257: In was just wondering if I got this right.
The problem is 5x+5y=5
3y=-6x+12
The answer I got was x=1 y=-2 please help I don't know if I'm right out not
Systems of equations problem using addition/elimination
Click here to see answer by mananth(16946)

Question 999264: 3X-y=5
X-y=7
Click here to see answer by mananth(16946)

Question 999223: The number of calories in a piece of pie is 20 less than three times the number of calories in a scoop of ice cream. The pie and ice cream together have 500 calories. How many calories are in each?
Click here to see answer by Cromlix(4381)

Question 999451: A line has a slope of -3 and passes through the point (4,-3)

Click here to see answer by rfer(16322)

Question 999518: solve each system of equations by the substitution method
2x-y=-7
4x-3y=-11
Click here to see answer by mananth(16946)

Question 999517: solve each system of equations by the substitution method
3y-x=6
4x+12y=0
Click here to see answer by mananth(16946)

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