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

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Question 885209: Determine the points of intersection of the parabola y = x ^ 2 - 6x + 2 and the line 2x + 3y = 1, and show how you're calculating.
Click here to see answer by josgarithmetic(39617)

Question 885173: Find the gradient of the tangent to y(x) = x2 at A(1,1), B(-1,1) and C(2,4).
Click here to see answer by KMST(5328)

Question 885291: Hey guys, im stuck on this word problem and was wondering if someone could show me step by step on how to solve this equation. Im confused when it comes to word problems, Thanks in advance
A marine biologist wants to set up n aquarium containing 3% salt water. He has two tank on hand that contain 6% and 2% salt water. How much water from each tank must he use to fill a 32-gallon aquarium with a 3% saltwater mixture?
Click here to see answer by nerdybill(7384)

Question 885293: Hey guys, im stuck on this word problem and was wondering if someone can show me step by step on how to solve it, thanks in advance.

The Marine Corps War Memorial in Arlington Virgina, portrays the raising of the U.S flag on Iwo Jima during World War II. Find the measures of the two angles shown if the measure of <1 is 15 degrees less than twice the measure of <2
Click here to see answer by Theo(13342)

Question 885290: One day a store sold 27 sweatshirts. White ones cost $9.95 and yellow one costs $13.50. In all, $339.65 worth of sweatshirts were sold. How many each color were sold?
Click here to see answer by mananth(16946)

Question 885288: Please help me solve the following system of equation.
-5x-3y=12
-2x-5y=1
x=
y=
Respectfully,
M. Rowser
Click here to see answer by ewatrrr(24785)

Question 885369: Translate to a system of equations but do not solve
A store sold 33 sweatshirts. White ones cost $10.95 and yellow ones cost $12.50. If $380.05 worth of sweatshirts were sold, how many of each were sold?
Let x = the number of white sweatshirts
Let y = the number of yellow sweatshirts
Complete the system of equations

Click here to see answer by harpazo(655)

Question 885372: $6300 is invested, part of it at 10% and part of it at 8%. For a certain year, the total yield is $566.00. How much was invested at each rate?
How much was invested at 10%?
How much was invested at 8%?

Click here to see answer by dkppathak(439)

Question 885396: One canned juice drink is 20% orange juice; another is 10% orange juice. How many liters of each should be mixed together in order to get 10L that is 15% orange juice?
How many liters of the 20% orange juice should be in the mixture?

Click here to see answer by josmiceli(19441)

Question 885394: A store mixes red fescue worth $12 per pound and chewings fescue worth $16 per pound. The mixture is to sell for $13 per pound. Find how much of each should be used to make a 240-pound mixture.
How many pounds of the red fescue should be in the mixture?

Click here to see answer by josgarithmetic(39617)

Question 885450: 5x+4y=19.75
x+2y=5.75
Click here to see answer by mananth(16946)

Question 885503: 2x-9y=3(x-3y)+4=?

Click here to see answer by rfer(16322)

Question 885733: 2x+3y=12;5x-3y=9(by substituion method)

Click here to see answer by kadash12(6)

Question 886300: Solve using any method.
4x-7y=18 and 9x+14=40
Click here to see answer by Alan3354(69443)

Question 886534: If company A gives 3% commission and 16,000 for sales. Company B gives 13% commission. How much do you have to sell to earn the same amount in wages.
Click here to see answer by JulietG(1812)

Question 886629:
Click here to see answer by MsWayx(1)

Question 886734: if one of the acute angles in a right triangle is 29 what is the measure of the other acute angle in the triangle
Click here to see answer by rfer(16322)

Question 886819: Use substitution to solve the system
4x-5y=19
X=2y+7
Click here to see answer by Alan3354(69443)

Question 886990: Xy=1
X+y=2
Click here to see answer by Alan3354(69443)

Question 886896: 61(3x+4y) = 29(7x+8y)
Find the value of x and y.
Click here to see answer by Edwin McCravy(20056)

Question 886896: 61(3x+4y) = 29(7x+8y)
Find the value of x and y.
Click here to see answer by MathTherapy(10552)

Question 887135: y-5= - 2/7x

Click here to see answer by Alan3354(69443)

Question 887164: y=4x-6 Which set of points are on the line? {(0,-6),(18,6)} {(0,-6), 6,18)} {(-6,0),(18,6)} {(-6,0),(6,18)}
Click here to see answer by Alan3354(69443)

Question 887163: -6x-6y=24, 18y=-18x-72 Identify the solution(s) of the system of equations, if any
Click here to see answer by richwmiller(17219)

Question 887186: I really need help anyone out there???
The school that Bill goes to is selling tickets to the annual Dance Competition. On the first day of ticket sales the school sold 8 senior citizen tickets and 5 child tickets for a total of $147. The school took in $84 on the second day by selling 1 senior citizen ticket and 5 children tickets. What is the price of one senior citizen ticket and one child ticket?
Thank you!!!!
Click here to see answer by josgarithmetic(39617)

Question 887197: Write an equation in slope-intercept form of each line described.
Slope = 2; passes through (2, -1)
Click here to see answer by mananth(16946)

Question 887370: Find the equation of the line that passes through the points (9,-9) and (-2,-1)
Click here to see answer by josgarithmetic(39617)

Question 887413: The square root of x^2-8x+16
Click here to see answer by Alan3354(69443)

Question 887413: The square root of x^2-8x+16
Click here to see answer by robertb(5830)

Question 887620: Did help understanding solving equation by process of elimination
Problem. 12x+10y=86 and x+y=8. Very confused.
Click here to see answer by Fombitz(32388)

Question 887624: what is 3x - y = 0 in Slope-intercept form?
Click here to see answer by rfer(16322)

Question 887695: Put 3x -y = 0 in slope-intercept form. Please show your work.
Click here to see answer by rfer(16322)

Question 887695: Put 3x -y = 0 in slope-intercept form. Please show your work.
Click here to see answer by jim_thompson5910(35256)

Question 887909: James Callahan has available a 10% alcohol solution and a 60% alcohol solution. Find how many liters of each solution he should mix to make 50 liters of a 40% alcohol solution?
Click here to see answer by Alan3354(69443)

Question 887900: 3x+2y=5 and -6x-4y=5
Click here to see answer by Fombitz(32388)

Question 887907: The perimeter of an isosceles (two sides equal) triangle is 73 centimeters. If the unequal side is 7 centimeters longer than the two equal sides, find the lengths of the three sides?
Click here to see answer by Fombitz(32388)

Question 888102: Last year you mowed grass and shoveled snow for 10 households. You earned $200 per household mowing for the entire season and $180 per household shoveling for the entire season. you earn a total of $1880 last year. Write and solve an algebraic model to determine the number of households you mow and shovel for.
Click here to see answer by lwsshak3(11628)

Question 888101: Jose has $20 more than Sara. Their combined money totals $90. Write and solve an algebraic model to determine the amount of money each person has.
Click here to see answer by skartikey(21)

Question 888106: The girls hockey team is going to put in an order for new jerseys.
Click here to see answer by richwmiller(17219)

Question 888230: If a baseball is thrown vetically upward while standing on the ground, the velocity of the baseball
v (in feet per second) after T seconds is V=120-32T.
I need to find V for T=0,1,2,3 and 4.
Then graph the equation using T as the horizontal axis
What is the significance of the negative value of V when T= 4

Click here to see answer by Alan3354(69443)

Question 888414: How many liters of 10% alcohol solution and 5% alcohol solution must be mixed to obtain 40 liters of 8% alcohol solution?

Click here to see answer by lwsshak3(11628)

Question 888704: solve the following system graphically. Be sure to check your solution. If the system has infinite number of solutions, use set builder notations to write the solution set. If the system has no solution sate this. 4y=x+4,
x=2/3y +8/3
Click here to see answer by Fombitz(32388)

Question 888690: What is the ordered pair for 7x+4x=39 and 2x=4y=14
Click here to see answer by Alan3354(69443)

Question 888742: How do i graph a graph if my equation is y=2x+4
Click here to see answer by josgarithmetic(39617)

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