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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 113983: Given f(x) = 5x2 – 3x + 1, find f(–2).
Click here to see answer by jim_thompson5910(28593)

Question 113986: Bob invested $20,000, part at 14% and part at 13%. If the total interest at the end of the year is $2,720, how much did he invest at 14%?
Click here to see answer by BrittanyM(80)

Question 113980: the base of an isosceles triangle and one of its legs have lengths that are consecutive integers. the leg is longer than the base. the perimeter of the triangle is 20. find the length of each side of the triangle.
Click here to see answer by checkley71(8403)

Question 114015: 3x + 1 > 2x + 7
Click here to see answer by jim_thompson5910(28593)

Question 114025: x + y = 8
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Question 114023: the length of a rectangle is 8 meters less than 5 times its width.if the perimeter of the rectangle is at most 104 meters, find the greatest possible length of the rectangle
Click here to see answer by checkley71(8403)

Question 114056: 3x - 2y = -4
Click here to see answer by jim_thompson5910(28593)

Question 114058:
the larger of two numbers is 1 more than 3 times the smaller. the difference between 8 times the smaller and 2 times the larger is 10. find the numbers.
Click here to see answer by checkley71(8403)

Question 114083:
HOW DO YOU GRAPH THE LINE THAT PASSES THROUGH THE (1,1) (3,3)
AND THEN WRITE THE EQUATION OF EACH LINE?
Click here to see answer by checkley71(8403)

Question 114051: 2x + 3y = 6

Click here to see answer by jayanthihemkos@yahoo.com(87)

Question 114195: At the market you purchase some apples and oranges. There were 12 items purchased. You buy twice as many apples as oranges.
how do i solve this??
Click here to see answer by stanbon(57328)

Question 114199: -5 - 2(3x - 4) = 21
how do i solve for x??
Click here to see answer by jim_thompson5910(28593)

Question 114199: -5 - 2(3x - 4) = 21
how do i solve for x??
Click here to see answer by stanbon(57328)

Question 114199: -5 - 2(3x - 4) = 21
how do i solve for x??
Click here to see answer by MathLover1(6628)

Question 114202: 5(3x - 6) - 8(3x - 7)
how do i simplify this??
Click here to see answer by jim_thompson5910(28593)

Question 114203: 5(3x - 6) - 8(3x - 7)
How do i simplify this??
Click here to see answer by jim_thompson5910(28593)

Question 114281: im having trouble understanding the systems of equations.....
how do i solve by graphing?? for ex: y=x+2, y=-x+4?? i dont understand how to solve then graph it......!!!!
Click here to see answer by Fombitz(13828)

Question 114608: Solve the system by addition.
3x – y = 1
3x – y = 2

Click here to see answer by checkley71(8403)

Question 114632: Find an equation of the line described. Write the equation in standard form.
Through (4,8) perpendicular to the y-axis

The equation is? ____ (Type your answer in standard form.
Click here to see answer by edjones(7569)

Question 114633:
How much of an alloy that is 10% copper should be mixed with 300 ounces of an
alloy that is 90% copper in order to get an alloy that is 50% copper?

___ ounces
Click here to see answer by checkley71(8403)

Question 114656: This is a problem that I need to solve by system of elimination and then check the answer. The problem is:
{3a+2b=2}
{a+6b+18}
How do I solve this, and check the problem. Please help.
Thank You
Click here to see answer by jgr45(22)

Question 114688: Find the domain of the given function.
h(x)= 1/x+1

____ (Use interval notation.)
Click here to see answer by edjones(7569)

Question 114687: How much of an alloy that is 20% copper should be mixed with 400 ounces of an alloy that is 70% copper in order to get an alloy that is 30% copper?

____ ounces
Click here to see answer by ankor@dixie-net.com(15649)

Question 114820: ax+ b = b
Click here to see answer by solver91311(16877)

Question 114829:
1 + 2x > 6 - 3x
Click here to see answer by checkley71(8403)

Question 114837:
One side of a triangle is 5 more than the base and the other side is 3 less than twice the base. if the perimeter is 26,find all three sides.
Click here to see answer by checkley71(8403)

Question 114842: solve for x: ax + b = a
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Question 114839:
Find the largest two consecutive even integers such that 100 decreased by three times the first one is greater than twice the second one.
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Question 114895: Can you help me solve this problem?
I am suppose to solve 2x2 by elimination method.
2p-5q = -33
6p-7q =39

Thank you,
Yolanda
Click here to see answer by checkley71(8403)

Question 114898: This is a problem from Section 8.1 on page 687. I cannot think backwards, which is what I believe I need to do. The problem is as follows:
Find values for m and b in the following system so that the solution to the system is (-3,4).
5x + 7y = b
mx + y = 22
Please help! Thank you!!
Click here to see answer by ankor@dixie-net.com(15649)

Question 114836:
find three consecutive integers whose sum is -126
Click here to see answer by checkley71(8403)

Question 114828:
2 - 3x < or equal to 8-x
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Question 114826:
3x - 2 < 4
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Question 114821: solve for y: 3x - 6y = 18
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Question 114815:
-4(7-2x) = 3(2x-1) - 5
Click here to see answer by checkley71(8403)

Question 114814:
4(x-8) = -x + 3
Click here to see answer by checkley71(8403)

Question 114813: 7x + 3 = 2x - 12
Click here to see answer by checkley71(8403)

Question 114832: 2x/3 - 2 ≤ 8 - x
Click here to see answer by jgr45(22)

Question 114980: If you buy 6 pens and 1 mechanical pencil you will only get $1 change from your $10 dollar bill, but if you buy 4 pens and 2 mechanical pencils you will get $2 change. How much does each pen and mechanical pencil cost?
Click here to see answer by stanbon(57328)

Question 115074: To graph an equation of Ax+By=C
2x+3y=6
Click here to see answer by stanbon(57328)

Question 115081: I'm sturggling with this problem. Any help would be greatly appreciated.
Solve the following non-linear system by substitution.
x^2+y^2=16
x-2y=0
Click here to see answer by stanbon(57328)

Question 115095: Graph an Equation of the form Ax + By = C
3x + y = 3
Click here to see answer by MathLover1(6628)

Question 115097: Graph an Equation of the form Ax + By = C

3x + y = 3
Click here to see answer by checkley71(8403)

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