Questions on Algebra: Graphs, graphing equations and inequalities answered by real tutors!

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Question 1103441: solve the linear system using the substitution method
y=2x+1 and y=-2x
Click here to see answer by josgarithmetic(39617)

Question 1103441: solve the linear system using the substitution method
y=2x+1 and y=-2x
Click here to see answer by ikleyn(52780)

Question 1103489: Solve for x

Click here to see answer by ankor@dixie-net.com(22740)

Question 1103491: Factor and simplify

Click here to see answer by Alan3354(69443)

Question 1103488: Convert into exponential equation

Click here to see answer by Alan3354(69443)

Question 1103490:
Review the following image and solve for h.

Thank you all

Click here to see answer by Theo(13342)

Question 1103525: the linear function y=1.25x represent the cost y ( in dollars) of x bottles of orange juice. each customer can buy a max of 5 bottles
What is the domain of the function??
Click here to see answer by Theo(13342)

Question 1103554: help me solve this please (x+y;2)=(4;x-y)

Click here to see answer by richwmiller(17219)

Question 1103554: help me solve this please (x+y;2)=(4;x-y)

Click here to see answer by greenestamps(13200)

Question 1103544: A mix of ingredients fills at a rate of 15 gallons/min. It drains at a rate of 35 gallons/minute. The ingredients start filling at 12:00, at 12:06 the drain is open. Write an equation showing the time it takes to fill or empty after the drain is open?
I know that it will empty before it fills, because it is draining faster than it is filling. I know that 15 x time will tell me that at 12:06 it will have 90 gallons. And that it will add 15 but take away 35. Just having trouble writing the equation.
Click here to see answer by greenestamps(13200)

Question 1103575: Write the slope-intercept equation of the function f whose graph satisfies the given conditions. The graph of f is perpendicular to the line whose equation is 3x-5y-10=0 and has the same y-intercept as this line.
Click here to see answer by Boreal(15235)

Question 1103586: Y=x^2+6x+1
Click here to see answer by ikleyn(52780)

Question 1103603: can you show mw how to graph y is greater than or equal to -3x plus 1?
Click here to see answer by Alan3354(69443)

Question 1103650: I teach Algebra 2. We are solving systems of inequalities by graphing. I was intrigued to notice that there appeared to be a "hole" in the answer key graph where one inequality (inclusive) intersected with another inequality (not inclusive) - e.g. where an equation with "less than or equal to" intersected with one that was "less than." I had never noticed "holes" in graphing solutions of inequalities before. This brought up the question: is the point of intersection of the two linear graphs - one dashed and the other solid - included in the solution or not? When we solve the system, I understand that we are looking for the "intersection" rather than the "union" of the system. That suggests that any solution point must satisfy all constraints at once. The point of intersection of the two lines would satisfy only one of the two inequalities, since one of the lines is not inclusive. So, should we teach students to insert a "hole" at that point of intersection?
Click here to see answer by ikleyn(52780)

Question 1103486: Graph y = -6^-x
Click here to see answer by ankor@dixie-net.com(22740)

Question 1103588: On the trip you and your friends stop for gas and decide to get drinks ($1.05-tax included) and snacks ($2.20-tax included) if they spend a maximum of $25.00 and wish to purshase at least 10 items:
Write a system of inequalities that shows the range of drinks and snacks you can buy with $25.00
Click here to see answer by josmiceli(19441)

Question 1103713: x+y+z=6, x-y+z=2, 2x+3y-z=5
In these system of equations use graphing, elimination and substitution
Click here to see answer by Theo(13342)

Question 1103879: Please help me. given the graph in the link below write the function for f(x) in standard form.
https://answers.yahoo.com/question/index?qid=20171206183151AA4mMeN
thanks.
Click here to see answer by Alan3354(69443)

Question 1104037: I must fill out this table of values:
y=5x I figured out this one
(-1,15)
(0,1)
(1,5)
(2,25)
(3,125)

y=-3(5x)

y=-3(5^(x+4))+2
However I don't understand how to complete y=-3(5x) and y=-3(5^(x+4))+2
How do I complete these two equations y=-3(5x) and y=-3(5^(x+4))+2 ?
Then using the points from equation y=-3(5^(x+4))+2 I must plot the points to create a graph, how do I create a graph based on this equation?
Thank you!

Click here to see answer by josgarithmetic(39617)

Question 1104193: I would like to know is y plus 8 equals -6x perpendicular parallel or neither next is -2 X Plus y equals 5 perpendicular parallel or neither
Click here to see answer by WlHicks43(1)

Question 1104535: Write the equation in slope-intercept form for the line that has a slope of -4 and passes through (1,2).
Click here to see answer by josgarithmetic(39617)

Question 1104704: y=-8/9x+9
Click here to see answer by josgarithmetic(39617)

Question 1104818: graph y <(< is underlined) -2
Click here to see answer by josgarithmetic(39617)

Question 1104850: How do I write an equation in slope-intercept form of the line that passes through the given points (-1,3) and (-3,1)?
Click here to see answer by josgarithmetic(39617)

Question 1104850: How do I write an equation in slope-intercept form of the line that passes through the given points (-1,3) and (-3,1)?
Click here to see answer by ikleyn(52780)

Question 1105088: Y<5X-3

Click here to see answer by Boreal(15235)

Question 1105088: Y<5X-3

Click here to see answer by josgarithmetic(39617)

Question 1105101: Which of the following describes the graph of y= −6y⁢= -6?
x-axis
horizontal line
diaagonal line
vertical line

Thank you !
Click here to see answer by Theo(13342)

Question 1105096: Which of the following describes the graph of 10= x10⁢= x?
horizontal line
vertical line
diagonal line
y-axis
Click here to see answer by Alan3354(69443)

Question 1105095: Which of the following describes the graph of x= −12x⁢= -12?
horizontal line
diagonal line
y-axis
vertical line
Thank you!
Click here to see answer by Alan3354(69443)

Question 1105094: Which of the following equations is graphed as a horizontal line?
y= 0y⁢= 0
0y+ 3= x0y⁢+ 3⁢= x
y= x− 1y⁢= x⁢- 1
x= 0

Thank you !
Click here to see answer by Alan3354(69443)

Question 1105097: Which of the following describes the graph of 0y− 4= x ?0y⁢- 4⁢= x⁢ ?
diagonal line
y-axis
horizontal line
vertical line
Thank you !
Click here to see answer by Boreal(15235)

Question 1105168: find the exact value
cos(n/6)cos(n/12)-sinx(n/6)sin(n/12)
Click here to see answer by ikleyn(52780)

Question 1105166: Find the exact value. cos(n/6)cos(n/12)-sin(n/6)sin(n-12)
Click here to see answer by ikleyn(52780)

Question 1105201: Which of the following describes the graph of 10=x ?
y-axis
diagonal line
horizontal line
vertical line
Click here to see answer by Alan3354(69443)

Question 1105203: Which of the following describes the graph of 0y− 4=x?
y-axis
diagonal line
vertical line
horizontal line
Click here to see answer by Alan3354(69443)

Question 1105200: Which of the following equations is graphed as a horizontal line?
y=x-1
x=0
y=0
0y+3=x

Click here to see answer by josgarithmetic(39617)

Question 1105199: Which of the following equations is graphed as a horizontal line?
0y+x=-1
x=0
y=0
0y+3=x
Click here to see answer by josgarithmetic(39617)

Question 1105198: Which of the following equations is graphed as a horizontal line?
0y− 1= x
2x= 4
x = 1/2
2y=6
Click here to see answer by josgarithmetic(39617)

Question 1105279: What is the equation of a line with a slope of −4 and a point (−2, 5) on the line?
Express the equation in the form of y=mx+b where m is the slope and b is the y-intercept.
thanks!! xx
Click here to see answer by josgarithmetic(39617)

Question 1105317: PLEASE Help Check my work. Thank you!
Write the equation of a line that is perpendicular to the given line and that passes through the given point.
y -4 =5/2 (x + 3) ; (-3, 4).

A) y + 4 = -2/5 ( x - 3)
B) y -3 = -2/5 (x + 4)
C) y - 4 = -2/5 ( x +3)
D) y + 4= -2/5 ( x - 3)<<
Click here to see answer by Alan3354(69443)

Question 1105344: Please help me solve the following:
Find the derivatives of the following polynomial: 3x-7
Thank you!
Click here to see answer by josgarithmetic(39617)

Question 1105519: Which of the following equations describes the line shown below? Check all that apply. (-4, 10) (-7, -5)
A. y - 5 = 5(x - 7)
B. y + 5 = 5(x + 7)
C. y + 10 = (x - 4)
D. y - 10 = 5(x + 4)
E. y - 10 = (x + 4)
F. y + 10 = 5(x - 4)
Click here to see answer by Fombitz(32388)

Question 1105518: Which of the following equations describes the line shown below? Check all that apply. (-4, 10) (-7, -5)
Click here to see answer by Fombitz(32388)

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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7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245, 16246..16290, 16291..16335, 16336..16380, 16381..16425, 16426..16470, 16471..16515, 16516..16560, 16561..16605, 16606..16650, 16651..16695, 16696..16740, 16741..16785, 16786..16830, 16831..16875, 16876..16920, 16921..16965, 16966..17010, 17011..17055, 17056..17100, 17101..17145, 17146..17190, 17191..17235, 17236..17280, 17281..17325, 17326..17370, 17371..17415, 17416..17460, 17461..17505, 17506..17550, 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20746..20790, 20791..20835, 20836..20880, 20881..20925, 20926..20970, 20971..21015, 21016..21060, 21061..21105, 21106..21150, 21151..21195, 21196..21240, 21241..21285, 21286..21330, 21331..21375, 21376..21420, 21421..21465, 21466..21510, 21511..21555, 21556..21600, 21601..21645, 21646..21690, 21691..21735, 21736..21780, 21781..21825, 21826..21870, 21871..21915, 21916..21960, 21961..22005, 22006..22050, 22051..22095, 22096..22140, 22141..22185, 22186..22230, 22231..22275, 22276..22320, 22321..22365, 22366..22410, 22411..22455, 22456..22500, 22501..22545, 22546..22590, 22591..22635, 22636..22680, 22681..22725, 22726..22770, 22771..22815, 22816..22860, 22861..22905, 22906..22950, 22951..22995, 22996..23040, 23041..23085, 23086..23130, 23131..23175, 23176..23220, 23221..23265, 23266..23310, 23311..23355, 23356..23400, 23401..23445, 23446..23490, 23491..23535, 23536..23580, 23581..23625, 23626..23670, 23671..23715, 23716..23760, 23761..23805, 23806..23850, 23851..23895, 23896..23940, 23941..23985, 23986..24030, 24031..24075, 24076..24120, 24121..24165, 24166..24210, 24211..24255, 24256..24300, 24301..24345, 24346..24390, 24391..24435, 24436..24480, 24481..24525, 24526..24570, 24571..24615, 24616..24660, 24661..24705, 24706..24750, 24751..24795, 24796..24840, 24841..24885, 24886..24930, 24931..24975