Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 43184: How do you solve for n in p=x+(n-2)y
I need to see each step on how to solve this. And it would be nice if you could explain why you did each step. Thank you very much.
Click here to see answer by Nate(3500)

Question 43174: Solve the equation.

Click here to see answer by checkley71(8403)

Question 43322: can someone take a look at this one please. Thank you!
2x^2 = 6x

Click here to see answer by psbhowmick(878)

Question 43349: In planning for a new item, a manufacturer assumes that the number of items produced x and the cost in dollars C of producing these items are related by a linear equation.Projections are that 100 items will cost 10,000 to produce and that 300 items will cost 22,000 to produce. find the equation that relates C and x
Click here to see answer by stanbon(75887)

Question 43359: y + 4 over y=-5
show work
Click here to see answer by stanbon(75887)

Question 43350: L has y-intercept (0,2) and is perpendicular to the line with equation 2x- 3y= 6.
Write the equation of the line passing through each of the given pair points. Whats the result in solpe-intercept form ?
Click here to see answer by venugopalramana(3286)

Question 43373: Hello!
Can someone help please?
My question is:
Two trains travel in the same direction at 50 kilometres per hour and 32 kilometres per hour respectively. A man in the slower train observes that 15 seconds elapse before the faster train completely passes him.
What is the length of faster train?
Thank you for your help and time.
geomar
Click here to see answer by longjonsilver(2297)

Question 43384: graph the functions f(x)=-2x-5
Click here to see answer by psbhowmick(878)

Question 43385: If f(x)=4x-3, find the following f(-1)
Click here to see answer by psbhowmick(878)

Question 43386: If f(x)=5x-1, find the following f(a-2)
Click here to see answer by AnlytcPhil(1806)

Question 43386: If f(x)=5x-1, find the following f(a-2)
Click here to see answer by psbhowmick(878)

Question 43388: graph the inequality
3x-4y <12
Click here to see answer by psbhowmick(878)

Question 43389: after graphing the boundary line for the linear inequality. Determine the correct half plane in this case and complete the graph
y>3
Click here to see answer by benni1013(206)

Question 43321: can someone please solve this one...
use Gauss-Jordan elimination and solve this
3x - y = 5
4x + 2 = 10
Click here to see answer by venugopalramana(3286)

Question 43387: solve the following application involving functions
exercises 54) If the inventor of exercise 53) charners $4 per unit, then his profit for producing and selling x unints is given by the function P(x) =2.25x-7000
a) what is her profit if she sells 2000 units?
b) what is her profit if she sells 5000 units?
c) what is the break-even point for sales?
exercise 53) the inventor of a new product believes that the cost of producing the product is given by the function c(x)=1.75x+7000
How much does it cost to produce 2000 units of her invention
Click here to see answer by benni1013(206)

Question 43383: Rewrite the equation as a function of x.
-3x+4y=11
Click here to see answer by benni1013(206)

Question 43381: Evaluate each function to the value specified
f(x) =x squared - 7x + 10; find (a)f(0), (b)f(5), and (c)f(-2)
Click here to see answer by fractalier(6550)

Question 43380: You have at least $30 in change in your drawer, consisting of dimes, and quaters. Write an inequality that shows the different numbers of coins in your drawer.
Click here to see answer by fractalier(6550)

Question 43355: solving rational expressions and equations

7 over 8 + 2 over 5 = x over 20
show work
Click here to see answer by fractalier(6550)

Question 43420: Please help with this, i need help with the formula more so than the answer. The problem is as follows
The price of a swimming pool has been discounted 16.5%. The sale price is $1210.75. Find the original list price of the pool.

thanks
Click here to see answer by stanbon(75887)

Question 43424: 5+3[1+2(2X-3)]=6(X+5)
Click here to see answer by jmg(22)

Question 43465: a^2-4 over a^2+3a+2
over
a^2-5a-6 over a^2-6a-7
having problems
show work
Click here to see answer by Nate(3500)

Question 43496: grade 10th problem 20:
WRITE THE EQUation of the line passing through each of the given pairs of points. write the result in slope-intercept form,if possible.

(-1,3) and (4,-2)
Click here to see answer by Nate(3500)

Question 43498: which of the following pairs of points both lie on the line whose equation is 3x-y=2 ?
a) (3,-2) & (1,5)
b) (2,4) & (3,7)
c) (2,4) & (1,5)
d) (2,-2) & (1,5)
e) (3,7) & (3,-2)
Click here to see answer by Nate(3500)

Question 43379: Please graph the inequality 4x+y is greater than or equal to 4
Click here to see answer by Nate(3500)

Question 43527: 6X + 4(3X - 2) = 6X + 2
My options are:
A)5/6
B)9/5
C) 12
D)0
Can someone help me with this...I can't figure this out.
Click here to see answer by Nate(3500)

Question 43528: How would I do this kind of problem
A telephone number consists of seven digits, the first three representing the exchange. How many different telephone numbers are possible within the 537 exchange?
Click here to see answer by Nate(3500)

Question 43577: Solve the equation: x-3-sqrt of x-1=0
The answer is one of the following: A.x=1,7 B.x=2,5 C.x=5 D.x=7
Thank you for your time!
Click here to see answer by stanbon(75887)

Question 43572: How do you solve (x+b)(x-b)=x(x-5) for x? I would like to see every step and it would be nice if you could explain why you did each step. Thank you very much.
Click here to see answer by stanbon(75887)

Question 43576: Find the solutions to the equations:|2x-14|=6
Answer is one of the following: A. x=-4,10 B. x=4,10 C. x=11,17 D. x=12,14
Thanks!
Click here to see answer by Nate(3500)

Question 43576: Find the solutions to the equations:|2x-14|=6
Answer is one of the following: A. x=-4,10 B. x=4,10 C. x=11,17 D. x=12,14
Thanks!
Click here to see answer by venugopalramana(3286)

Question 43540: 3 over a^2-9 + 2 over a+3
all over
4 over a^2 -9 + 1 over a+3
the answer is 2a-3 over a+1
show how you would get that
Click here to see answer by gsmani_iyer(201)

Question 43608: What if an equation had three variables?
Click here to see answer by stanbon(75887)

Question 43653: I need help on the following: Find the solutions to the equation: x^2+2x+5=0. Thanks!
Click here to see answer by tutorcecilia(2152)

Question 43669: Does anyone know:
Is 12 a solution to the equation 19 - x = 7?

Click here to see answer by checkley71(8403)

Question 43669: Does anyone know:
Is 12 a solution to the equation 19 - x = 7?

Click here to see answer by Nate(3500)

Question 43672: I can not do this problem, and anyone help me please?

Solve the following system by graphing:
3x - 6y = 9
x - 2y = 3
In EQUATION2 show:y-intercept as an ordered pair =>
x-intercept as an ordered pair =>
What is the solution for this system?

What type of system is this?
Click here to see answer by checkley71(8403)

Question 43661: Solve the equation for the indicated variable. (Leave � in your answer, when appropriate.)
for t
Click here to see answer by psbhowmick(878)

Question 43661: Solve the equation for the indicated variable. (Leave � in your answer, when appropriate.)
for t
Click here to see answer by Nate(3500)

Question 43706: Hi,
I have 1/T = 0.00263
how do I find T? I don't remember the rule and can't find it anywhere!
thanks,
Kevin
Click here to see answer by jake_6233(74)

Question 43729: 14.
The length of a rectangle is 8 in. more than twice its width. If the perimeter of the rectangle is 64 in., find the width of the rectangle.

A) 8 in. B) 9 in. C) 10 in. D) 7 in.

Click here to see answer by Nate(3500)

Question 43728: 13.
One number is 12 more than another. The sum of the smaller number and twice the larger number is 39. Find the larger number.

A) 34 B) 17 C) 5 D) 7

Click here to see answer by Nate(3500)

Question 43733: 17.
Solve the system by graphing.
3x + y = �1
9x + 3y = �3

Click here to see answer by aaaaaaaa(138)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 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39916..39960, 39961..40005, 40006..40050, 40051..40095, 40096..40140, 40141..40185, 40186..40230, 40231..40275, 40276..40320, 40321..40365, 40366..40410, 40411..40455, 40456..40500, 40501..40545, 40546..40590, 40591..40635, 40636..40680, 40681..40725, 40726..40770, 40771..40815, 40816..40860, 40861..40905, 40906..40950, 40951..40995, 40996..41040, 41041..41085, 41086..41130, 41131..41175, 41176..41220, 41221..41265, 41266..41310, 41311..41355, 41356..41400, 41401..41445, 41446..41490, 41491..41535, 41536..41580