Questions on Algebra: Linear Algebra (NOT Linear Equations) answered by real tutors!

Tutors Answer Your Questions about Linear Algebra (FREE)

Question 665942: A basketball player scored 24 times during one game. He scored a total of 40 points,2 points for each 2 point shot and 1 point for each free throw. How many 2 point shots did he make? How many free throws?
Click here to see answer by josmiceli(19441)

Question 667193: Can you help me solve this problem?
5x(x-3)^3 + (10(x-3)^4
Click here to see answer by Alan3354(69443)

Question 667203: Can you help me with this question?
5x^a+3y^2 / 15x^2ay^-b
Click here to see answer by Alan3354(69443)

Question 667199: Can you help me with this problem?
5x(x-3)^3 + 10(x-3)^4
Click here to see answer by Alan3354(69443)

Question 668491: 4(b-1)=-4+4b
Click here to see answer by jim_thompson5910(35256)

Question 668726: use the distributive property to simplify 7(-5x + 7)
Click here to see answer by swincher4391(1107)

Question 668793: Find vertex form of 25-x^2 and graph.
I am completely lost and my notes aren't helping!
Click here to see answer by jim_thompson5910(35256)

Question 670145: Let X = {x | x is a whole number less than 10}, Y = { x | x is an odd number}
What is X∩Y?
Click here to see answer by stanbon(75887)

Question 670324: tell whether the linear equation has infinatley many, one or no solution
1/2x-2y=1/3
3x-12y=2
Click here to see answer by Alan3354(69443)

Question 670329: Tell whether the linear system has infinatley many, one or no solution
x-4y=2
2x-8y=5
Click here to see answer by Alan3354(69443)

Question 670356: find the x and y intercepts
x-3y=9
Click here to see answer by VirtualMathTutor(26)

Question 670636: Solve by substituting.
y=2x+3
5x-y=-3
Click here to see answer by ewatrrr(24785)

Question 670702: Need help solving
iTunes charges $1.00 per song to download. Napster only charges 0.80 cents to download but they charge a $20.00 membership fee. How many songs would you have to download for the websites to equal each other?
Thanks So much for the help
Click here to see answer by edjones(8007)

Question 670795: The sum of two numbers is 95 and the greater is 15 more than the lesser. If x is greater of the two numbers, write an equation that could be used to determine the numbers and solve for x.
Click here to see answer by checkley79(3341)

Question 670835: If a line intersects the x-axis at (a,0) and the y-axis at (0,b) at what point does it intersect the line y=x?

Click here to see answer by stanbon(75887)

Question 670835: If a line intersects the x-axis at (a,0) and the y-axis at (0,b) at what point does it intersect the line y=x?

Click here to see answer by josmiceli(19441)

Question 670824: x-y+z= 8
x+y+z= 6
x+y-z= - 12
Solve the system of equations

Click here to see answer by lynnlo(4176)

Question 671092: 12. Solve the inequality for y. 5(5x - 4y) < 3(2 + 8x) - 17y. Please explain your awnser too so i dont have to ask another question like this!
Thank you!
Click here to see answer by ReadingBoosters(3246)

Question 671373: The cost (in dollars) of g gallons of gasoline and be modeled by C(g) = 2.25g. The gasoline used by an SUV can be modeled by g(d) = 0.025d where d is the distance (in miles). Find C(g(d)). Evaluate C(g(500)). What does C(g((500)) represent?
Click here to see answer by stanbon(75887)

Question 672289: How would you solve a=2/6w+9?

Click here to see answer by solver91311(24713)

Question 672197: Your friend tells you she is twice as old as her little sister, who is not yet a teenager. How old could your friend be?

(This seems so simple that I am not sure what the answer or how to solve)
Click here to see answer by neatmath(302)

Question 673729: How do i write y=x in standard form? i dont know how to write equations in standard form.
Click here to see answer by ReadingBoosters(3246)

Question 673980: first off im not sure if this is linear equations but my question is "translate f(x)=|x| so that the vertex is at the point (8, 0.5)"
Click here to see answer by stanbon(75887)

Question 674232: Get this in slope intercept form.
4y-12x= -16
show all work
Click here to see answer by ewatrrr(24785)

Question 674212: show working for 3/y-2/y-2
Click here to see answer by jim_thompson5910(35256)

Question 674383: how do you substitute:
3u + 8 = 4v
24v = 6 - 3u
Click here to see answer by ReadingBoosters(3246)

Question 674383: how do you substitute:
3u + 8 = 4v
24v = 6 - 3u
Click here to see answer by josmiceli(19441)

Question 674324: small theater has a seating capacity of 2000. When the ticket price is $18, attendance is 1500. For each $1 decrease in price, attendance increases by 100.
(a) Write the revenue R of the theater as a function of ticket price x.
Click here to see answer by ankor@dixie-net.com(22740)

Question 674955: solve for x
x+1=y
-4x+16=y
Click here to see answer by ReadingBoosters(3246)

Question 674992: f(X)=2/x^2-2x-3, what is the Y-intercept?
Click here to see answer by Alan3354(69443)

Question 675597: Two equal sides of an isosceles triangle are 4m less than 3 times the third side.Find the dimensions of the triangle,if the perimeter is 55m.
Click here to see answer by lwsshak3(11628)

Question 676820: How do I solve and graph y = |x + 3| � 4?
Click here to see answer by ReadingBoosters(3246)

Question 678043: can u explain this equation to my son, i can do it by memory but cant explain to him in a he can implement it in the future.
y/6-2=10
Click here to see answer by ReadingBoosters(3246)

Question 678515: Please help,
Solve for x: -3(x + 1) - x/2 + 3/2 < 0
Click here to see answer by ReadingBoosters(3246)

Question 678515: Please help,
Solve for x: -3(x + 1) - x/2 + 3/2 < 0
Click here to see answer by MathLover1(20849)

Question 680057: Write an equation of the line that has each pair of intercepts:

x-intercept -3, y-intercept 5
Click here to see answer by ReadingBoosters(3246)

Question 680464: how do u solve for x
(X^2/16)+((3x-3)/25)=1
Click here to see answer by stanbon(75887)

Question 680747: Solve Linear Systems Algebraically.
x+ 4y = 1
3x + 2y = -12
and
3x + 2y = 6
x-4y = -6
Pleas help, Clari
Click here to see answer by mananth(16946)

Question 681636: -4(3x-4)=2(4x-24)

Click here to see answer by jim_thompson5910(35256)

Question 682221: Hello I have to solve three equations with three variables
The equations are
6q-r+2s=8
2q+3r-s=-9
4q+2r+5s=1
I have the equations using the process of elimination to find x y and z
The problem is I've been on this question for more than an hour either getting decimals as my answers and or equations which I can't solve
Honestly I don't know what I'm doing wrong.Ive tried to eliminate the q's first but afterwards towards solving I got 2.5 which I know is wrong
Click here to see answer by ankor@dixie-net.com(22740)

Question 682480: 3x-y is equal to or greater than 6
Click here to see answer by ReadingBoosters(3246)

Question 683398: how do you graph -3x+4y=-24
Click here to see answer by ReadingBoosters(3246)

Question 684139: A line with x-intercept -3 and y-intercept k passes through the point (5,8). Find the value of k.
Click here to see answer by ReadingBoosters(3246)

Question 684137: A line passes through the points (-1,5) and (3,k) and has y-intercept 7. Find the value of k.
Click here to see answer by ReadingBoosters(3246)

Question 684479: An elementary-school-age child wants to have a lemonade stand. She wants to sell each glass of lemonade for $0.25. She has determined that each glass of lemonade costs about $0.15 to make (for lemons and sugar). It costs her $20.00 for materials to make the lemonade stand. How many glasses of lemonade must she sell to break even?
Click here to see answer by josmiceli(19441)

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