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

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Question 941487: solve the equation below and show steps in work
1/3(12+x)=-8(6-x)
Click here to see answer by MathTherapy(10552)

Question 530637: `Graph the following 2y=10
Find two points on the line to be graphed and enter their coordinates in the
boxes below.
A: _______ , ________
B: _______ , ________
Click here to see answer by stacystarr(1)

Question 941608: A person is ordered by doctor to take 15 units of vitamin A, 11 units of vitamin D, and 9 units of vitamin E each day. There are three brands of vitamin supplement available: brand X contains 2, 1, and 2 units, brand Y contains 3, 2, and 2 units and brand Z contains 4, 4, and 1 units of vitamin A, D, and E, respectively. How many pills of each brand will provide the required amounts of vitamin? ___ pills of brand X, ___ pills of brand Y and ___ pills of brand Z.

Click here to see answer by TimothyLamb(4379)

Question 941607: A company mixes peanuts, cashews, and almonds to obtain 23 oz package worth 6.13 dollars. If peanuts, cashews, and almonds cost 11, 42, and 52 cents per oz respectively, and the weight of cashews in each package is equal to the weight of almonds, how much of each is in the package? ___oz of peanuts, ___oz of cashews, and ___oz of almonds.
Click here to see answer by TimothyLamb(4379)

Question 941622: Maggie is going to the mall with her friends and has $200 to spend from her birthday and Christmas money. She finds a store that has jeans for $25 and dresses for $50 (prices include tax).
When Maggie leaves the store she has spent all of her $200 and has bought 6 items of clothing. How many pairs of jeans and many dresses did she purchase?
Click here to see answer by TimothyLamb(4379)

Question 941620: A test has a combination of true/false questions, worth 3 points each, and multiple-choice questions, worth 11 points each. The test has a total of 20 questions and a total of 100 points. How many multiple-choice questions are on the test?
Click here to see answer by TimothyLamb(4379)

Question 941624: 2x-3y=2
-2+2y=-2
Click here to see answer by TimothyLamb(4379)

Question 941674: Is this correct
solving for x

5^3x= 5^(4x-2)
x- (log⁡(25)+2 i π n)/(log⁡(5))
x=2

Click here to see answer by Alan3354(69443)

Question 941671: Is this correct
solving for x

(1�x)^5 = (2x�1)^5
X=2/3

Click here to see answer by Alan3354(69443)

Question 941672: Is this correct
solving for x

(4/5)^(6x+1)=5/4
X= - 1/3

Click here to see answer by Alan3354(69443)

Question 941670: Is this correct
solving for x

2xe^-x= 0
X=0

Click here to see answer by Alan3354(69443)

Question 941673: Is this correct
solving for x

7^x^(2)= 7^2^(x + 3)
X2= 2x + 3
X= -√(2^x )+3
X= √(2^x )+3
X ≈ -1.61569

Click here to see answer by Edwin McCravy(20056)

Question 941747: I have a hard time with this and I am trying to make sure I have did this question correctly
Y=2x-1
-x+y=1
+x. +x
Y=x+1
Is this correct?it is supposed to be solved by graph and check
Click here to see answer by Alan3354(69443)

Question 942004: How do you solve this system of equations:
y=3x+1
x+2y=-5

Click here to see answer by rfer(16322)

Question 942022: How do you solve this system of equations:
2x + 3y = 9
x - 2y = 1

Click here to see answer by rfer(16322)

Question 942088: how do i solve the linear system:
x-2y=9
3x-y=17
I do not understand it because the y value does not cancel out, so what am i supposed to do with it?

Click here to see answer by jim_thompson5910(35256)

Question 942341: 21b+2c=-150
-14b-1c=24
Click here to see answer by Alan3354(69443)

Question 942482: Given that, (2w-4)/3 = w-3, calculate the value of w
Click here to see answer by josgarithmetic(39617)

Question 942597: Determine the value of k in y=kx^2-5x+2 that will result in the intersection of the line y=-3x+4 with the quadratic at
a) two points (1 mark)
b) one points (1 mark)
c) no point (1 mark)
Click here to see answer by josgarithmetic(39617)

Question 942697: Is this line parallel, perpendicular, or neither? y= 6 and x= -2
Click here to see answer by Alan3354(69443)

Question 942861: How much are the wheat rolls and how much are the rye rolls.
4 Wheat rolls + 4 Rye rolls = $4
6 wheat rolls + 2 rye rolls = $3.60
Click here to see answer by TimothyLamb(4379)

Question 942927: solve by the method of substitution
y=-5
5x+4y=-20

Click here to see answer by Alan3354(69443)

Question 942940: solve by the method of substitution
x+7y=0
2x-8y=22
Click here to see answer by Alan3354(69443)

Question 942939: solve by the method of substitution
4x+2y=10
x-y=13
Click here to see answer by Alan3354(69443)

Question 942939: solve by the method of substitution
4x+2y=10
x-y=13
Click here to see answer by 10009904@richland2.org(1)

Question 942939: solve by the method of substitution
4x+2y=10
x-y=13
Click here to see answer by MathTherapy(10552)

Question 943175: solve the question if the value of x is 2 then find y=2/3x-1
Click here to see answer by macston(5194)

Question 943147: Please show me the steps and Solve for �x� and �y� given the following two equations using the elimination method:
2x + 3y = 8
x = 2y - 3
I need this by today if possible.
Thank you very much.
Click here to see answer by Fombitz(32388)

Question 943283: Suppose the height, h, in feet, of a trampolinist above the ground during one bounce is modeled by the quadratic function h(t) = -16t^2 + 42t + 3.75 . For what period of time is the trampolinist at least 22 ft above the ground? Round your answers to the nearest hundredth.
Click here to see answer by TimothyLamb(4379)

Question 943236: Determine the value of k in y=kx^2-5x+2 that will result in the intersection of the line y=-3x+4 with the quadratic at
a) two points (1 mark)
b) one points (1 mark)
c) no point (1 mark)
My work on the question:
kx^2-5x+2=-3x+4
kx^2-2x-2=0
What I need for someone to help me with:
parts a,b and c showing and explaining how you got it and also if I did something wrong concerning the simplified form of the equations,explain where I went wrong and help recalculate the simplified form of the equations.
Thank you
Click here to see answer by MathLover1(20850)

Question 943280: x + y greater than or equal to 3
Click here to see answer by Fombitz(32388)

Question 943845: please help me solve by elimination method
x-y=4
x-2y=10
Click here to see answer by Alan3354(69443)

Question 943856: this is a question of solving a system of equations with substitution,
x+y=24
y=7x
Click here to see answer by MathLover1(20850)

Question 944057: Solve by the elimination method. x - y = -13 and 6x - 8y = -86
I need this today please. Thank you.

Click here to see answer by macston(5194)

Question 944311: A motorist made a 200 km trip averaging 50 km/h on a level road and 25 km/h on a mountain road. The time spent on the mountain road was 1 hour less than the time spent on the level road. How many km of the trip were on the mountain road?
Click here to see answer by ankor@dixie-net.com(22740)

Question 944389: 6x+7/4X-1 = 3X+8/2X-4

Hi, my name is Grace and I am having some trouble solving this equation. I am completely stumped because I don't have very helpful examples. Thank you for your time
Click here to see answer by stanbon(75887)

Question 944459: what is 2y=6x+4 and 2x+y=7 using substitution ?
Click here to see answer by macston(5194)

Question 944487: x + y = 7
2x + y = 5
Click here to see answer by Alan3354(69443)

Question 944769: find the ordered pair solution to the following: 2x + 3y = 12 & 10x + 3y = -12
Click here to see answer by MathLover1(20850)

Question 944909: Leila left home at noon, traveling at 24 mi/h. An hour later her brother Josh, driving 36 mi/h, set out to over take her. How long did it take him? (Hint: let l = time leila's time in h, let j = josh's time in h.)
Click here to see answer by Alan3354(69443)

Question 944910: It took Henri 50 h of cycling to finish his bike tour. On the return trip over the same route, he increased his cycling rate by 1 mi/h and took 45 h. What was his rate on the return trip.
Click here to see answer by josmiceli(19441)

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