Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 128172:
what number is 3 fourth % of 80
Click here to see answer by checkley71(8403)

Question 128215: write the equation of each line in standard form. Passes through (-6,2) and (-2, 0)
Click here to see answer by ozymandias(9)

Question 128165: Using the equations of -2x+3y=6 and 3x-5y=-11, I need to solve for x and y using the methods of substituiton, addition, and graphing.
I believe that I put the equations into y=mx+b to get:
3y=-2x+6 and -5y=3x-11
The different methods of substitution and addition confuse me, can you help me understand?
Click here to see answer by solver91311(24713)

Question 128237:
Z
- =4
3
what would z be = to? i have to have a whole number.
Click here to see answer by checkley71(8403)

Question 128239: can you have a decimal on top of a fraction like this?
3.25
____ =4
13
Click here to see answer by checkley71(8403)

Question 128243:
-k=9(k-10)
Click here to see answer by checkley71(8403)

Question 128245: Z
__ =4
13
I have to use a whole number
Click here to see answer by checkley71(8403)

Question 128271: Hi, Can I please have some help with this problem about functions? thank you!
An appliance dealer advertises a 15% discount on all his washing machines. In addition, the manufacturer offers a $80 rebate on the purchase of a washing machine. Let x represent the sticker price of the washing machine.
(a) Suppose only the 15% discount applies. Fund a function f that models the purchase price of the washer as a function of the sticker price x
f(x) =
(b) Suppose only the $80 rebate applies. Find a function g that models the purchase price of the washer as a function of the sticker price x.
g(x) =
(c) Find f � g.

(d) Find g � f.
Click here to see answer by stanbon(75887)

Question 128352: 8x-11(x-2)=-8
Click here to see answer by jim_thompson5910(35256)

Question 128348: y=3/2x-1
Click here to see answer by jim_thompson5910(35256)

Question 128031: Expand[x+2][X-7]
Click here to see answer by JessicaGill(40)

Question 127995: Tell wether the ordered pair is a solution of the linear system.
(1,-1);
2x - y = 3
4x + 2y = 2
Any help with this equation would be Greatly appreciated.
Click here to see answer by JessicaGill(40)

Question 128370:
Write the equation of the line through the given points.
28. (1,5),(0,6)
Someone please help me with this equation,any help would be given much gratitude :)
Click here to see answer by checkley71(8403)

Question 128384: Tell whether the ordered pair is a solution of the linear system.
(-2,15);
y = -3x + 9
y = 5x + 25
Someone please help me with this equation,any help would be appreciated :)
Click here to see answer by checkley71(8403)

Question 128383: Tell wether the ordered pair is a solution of the linear system.
33. (1, -1);
2x - y =3
4x + 2y =2
Someone please help me with this equation,any help would be greatly appreciated
Click here to see answer by JessicaGill(40)

Question 128399: 1/2x=22
Click here to see answer by jim_thompson5910(35256)

Question 128404: Please help solve the problem below:
5x - 2y= 4
x + 2y= 8
Click here to see answer by josmiceli(19441)

Question 128458: how to write 12x + 3y = 6 in function form and then graph.
also 4x - 2y = 16
Click here to see answer by jim_thompson5910(35256)

Question 128537: I can't figure this out at all.
Problem #44 states: Suppose , and a,b,c and d are all positive integers. Find the value of .
I don't even know how to begin. I understood this chapter up to this question.
Thanks.
Click here to see answer by jim_thompson5910(35256)

Question 128569: Hi Can I have some help with the following function?
A function f is given.
f(x) = √6x - 8

(a) Find f -1.
Click here to see answer by jim_thompson5910(35256)

Question 128592: Solve:
9x � 10 = 3x - 1

Click here to see answer by jim_thompson5910(35256)

Question 128616: Suppose that the length of a rectangle is 3 inches longer than the width and that the perimeter of the rectangle is 78.
A) Set up an equation involving only W, the width of the rectangle.
B) Solve this equation algebraically to find the length of the rectangle, find the width as well.
Length = Width =
Click here to see answer by checkley71(8403)

Question 128684: Let f(x) = -x - 5 and g(x) = 2x + 3
31. f(4)
Help with this equation would be appreciated:)
Click here to see answer by solver91311(24713)

Question 128685: Let f(x) = -x - 5 and g(x) = 2x + 3
g(0)
Help with this equation would be appreciated.

Click here to see answer by bucky(2189)

Question 128686: Tell wether the ordered pair is a solution of the linear system.
(0,3);
4x - 3y = 9
x + 6y = 18
Help with this equation would be appreciated.
Click here to see answer by solver91311(24713)

Question 128692: Let f(x) = -x - 5 and g(x) = 2x + 3. Find the indicated value.
g(0)
Help with this equation would be appreciated.
Click here to see answer by solver91311(24713)

Question 128717: can you help me solve

2z -1/3 = 1/2
Click here to see answer by checkley71(8403)

Question 128740: Please help me "evaluate the expression" for a= -2, b= 4, c=3
2b^ - 4ac + bc
Click here to see answer by psbhowmick(878)

Question 128748: Hi. Can I have some help with inverse functions?
If g(x) = -2x - 7, find g ^-1(3).
Click here to see answer by psbhowmick(878)

Question 128749: -5n+6=5n-4
Click here to see answer by jim_thompson5910(35256)

Question 128760: help please
Solve by substitution. If a unique solution does not exist, state whether the system is dependent or inconsistent.
3x � 4y = 0
2y = x + 1

Click here to see answer by jim_thompson5910(35256)

Question 128783: HELP ME SOLVE THIS :
90-3/2N=30
Click here to see answer by MarisaLeigh(1)

Question 128805: Solve the system.
2x + 6y + 4z = 22
3x + 7y + 4z = 23
5x + 3y - 5z = -14
Click here to see answer by Edwin McCravy(20054)

Question 128831: Please help solve :
fraction:9/2 -n/12=1/4
Click here to see answer by checkley71(8403)

Question 128854: Can I have some help finding the inverse function of f?
f(x)=1/(-10 x^2 + 6),text( )x>=0
Click here to see answer by stanbon(75887)

Question 128852: Can I have some help finding the inverse function of f.
f(x) = -4 + x
Click here to see answer by ilana(307)

Question 128852: Can I have some help finding the inverse function of f.
f(x) = -4 + x
Click here to see answer by jim_thompson5910(35256)

Question 128889: what is 2X+3=9 X=
Click here to see answer by apachemexican1(64)

Question 128815: please help solve the following is a fraction

90 - 3/2n(fraction)=30
Click here to see answer by apachemexican1(64)

Question 128925: Tutor could you help me please with this problem?
Thank you very much!

13a-15b-a+2b=
Click here to see answer by checkley71(8403)

Question 128929: Tutor could you please help me with the following problem: x+4y=16
If both x and y are positive integers in this equation, how many different values can x have? (1,2, 3 or 4) I chose 3..am I correct?
Thank you for your help!
Click here to see answer by checkley71(8403)

Question 128937: Question for Tutor Checkley 71..First of all thank you for your help..I want to make sure that I'm understanding the problem and the answer I previously wrote you about. the problem is x+4y=16 how many values does x have..I must be waay off base the reason I thought it was three values for X was because I wrote out: 4+4*3=16, 8+4*2=16 and 12+4*1=16 which gave me three values for X
Click here to see answer by checkley71(8403)

Question 128952: Tutor could you help me check the answer to this problem. (2xy^3)^3=
The answer that I came up with is 2x^3y^9 am I correct?
thank you very much for your time and tutoring!
Click here to see answer by tutorcecilia(2152)

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