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

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Question 38266: The difference of two numbers is 45. The second is 3 less than 3 times the first. What are the two numbers?
Click here to see answer by fractalier(2101)

Question 38263: x2-6x-16=0
Click here to see answer by checkley71(8403)

Question 38261: Find the slope -6x - 9y = 12
Click here to see answer by fractalier(2101)

Question 38261: Find the slope -6x - 9y = 12
Click here to see answer by checkley71(8403)

Question 38260: If the perimeter of a rectangle is 24 ft and the width is 7 ft, find its length.
Click here to see answer by fractalier(2101)

Question 38260: If the perimeter of a rectangle is 24 ft and the width is 7 ft, find its length.
Click here to see answer by checkley71(8403)

Question 38287: dear online tutor,
i'm having trouble graphing problems such as y=2x-5 and problems like y<2x+1. can you help me or at least give me some examples

Click here to see answer by Nate(3500)

Question 38324: if n=4.97,solve for 31.6-n
Click here to see answer by Nate(3500)

Question 38290: find the equation of a line that contains the point (-2,4) and is parrallel to y=2x-3. Please show work. Thanks!!
Click here to see answer by josmiceli(9817)

Question 38417: what is the measurement of height if the radius of the cylinder is 3cm and the volume is 121cm? Then graph this function.
This is what I got so far:
v=2pir^2 + 2pirh
121= 2pe(3)^2 + 2pi(3)h
121 = 18 + 6
h= 24
I don't know if this is right. Don't I need 2 points to plot anything on a graph? Could you please help me? Christine
Click here to see answer by fractalier(2101)

Question 38380:
Click here to see answer by Evy(14)

Question 38397: How do I graph this function v=x(4-2x) (6-2x) I am not sure where you receive the points from. Thanks, Christine
Click here to see answer by AnlytcPhil(1278)

Question 38513: A rectangle has sides of 3x – 4 and 7x + 10. Find the expression that represents its perimeter.
P = 2L + 2W
P = 2(3x-4) + 2(7x+10)
I have already submitted this one before but I don't think the answer was in perimeter form.
Can someone tell me if this looks correct.
Click here to see answer by Nate(3500)

Question 38470: multiply n^10 times n^8
Click here to see answer by Alwayscheerful(414)

Question 38468: Evaluate
5 times 4 divided by 2 - 4^2
Click here to see answer by Alwayscheerful(414)

Question 38530: How do you solve for the boundary points of equations y=x^2+2x+1 and y=4?
Click here to see answer by longjonsilver(2297)

Question 38452: I'm about ready to give up. The question is: Write the equation of the line passing through each of the given pair of points. Write your result in slope-intercept form, where possible. (-1, 3) and (4, -2).
Thanks so much!
Click here to see answer by longjonsilver(2297)

Question 38455: I'm about ready to give up. The question is: Write the equation of the line passing through each of the given pair of points. Write your result in slope-intercept form, where possible. (-1, 3) and (4, -2).
Thanks so much!
Click here to see answer by lyra(94)

Question 38553: solve the inequality symbolically. Express the solution set in interval notation.
7y-2<-6y-7
Click here to see answer by fractalier(2101)

Question 38553: solve the inequality symbolically. Express the solution set in interval notation.
7y-2<-6y-7
Click here to see answer by AnlytcPhil(1278)

Question 38473: this is for quadratic formula and parabolas which could be the graph of the parabola a.y=x2=1,b.y=x2-1,c.y=-x2=1,d=-x2-1
Click here to see answer by rapaljer(4667)

Question 37519: Write the equation of the line passing through (-3, -5) and (3,0).
Click here to see answer by checkley71(8403)

Question 37736: How do I graph an inequality? How do I get "Y" by its self in this problem i have to solve? 3x+4y is greater than or equal to 17. i need to find ordered pairs for it and graph it. if you can help me that would be great. thanks!!!
-lauryn
Click here to see answer by Nate(3500)

Question 38057: DRAW THE GRAPH OF A DIRECT VARIATION THAT INCLUDES THE GIVEN POINT.
A. (-2,5)
B. (3,2)
Click here to see answer by Nate(3500)

Question 38680: Express the statement in terms of an inequality involving an absolute value. The radius r of a ball bearing must be within 0.01 cm. of 1 cm.
Click here to see answer by AnlytcPhil(1278)

Question 38678: Express the interval as an inequality in the variable x. (-4.-1)
Click here to see answer by jcmtnez(53)

Question 38702: 1.y+2=9x(X-4)
2.WRITE AN EQUATION OF A LINE WITH THE GIVEN SLOPE AND Y-INTERCEPT
a.M=1,B=4
B.M=1/4,B=-3/4
3.Y=3/4X-3

Click here to see answer by Nate(3500)

Question 38756: Find the slope of the line for: "y= -5" and also "y=9x+2".
Click here to see answer by Nate(3500)

Question 38759: Express the interval as an inequality in the variable x. (- infinity, 2]
Click here to see answer by Nate(3500)

Question 38762: what kind of graph will the equation 1/x always make?

Click here to see answer by Nate(3500)

Question 38805: how do you graph y=(x-1)(x-4) show me the steps
Click here to see answer by Nate(3500)

Question 38758: Can you show me the linear equation for "-4x + y = 0".
Click here to see answer by checkley71(8403)

Question 38844: Write the equation of the line with slope 4 and y-intercept (0,5).
Click here to see answer by checkley71(8403)

Question 38942: How do I sketch a graph of the equation: y= 3x^2+6x-10
Click here to see answer by stanbon(57967)

Question 38976: write an equation in stadard form that satisfies the given conditions.
perpendicular to y=-x-3,through(0,0)
Click here to see answer by Nate(3500)

Question 39110: Find an equation of the line that satisfies the conditions. Write the equation in standard form. Through (5,5); m= -3/4
Click here to see answer by fractalier(2101)

Question 39112: Find an equation of the line satisfying the conditions. Write the equation in slope-intercept from. Through (-6,7); parallel to 3x+7y=3
Click here to see answer by fractalier(2101)

Question 39111: Find an equation of the line passing through the two points. Write the equation in standard form. (8,2) and (3,6)
Click here to see answer by fractalier(2101)

Question 39136: what is the direct variation if y=5 when x=10 find y when x=1
Click here to see answer by fractalier(2101)

Question 39192: f(x)=-2x g(x)= -2x-1
please help
thanks
Click here to see answer by Nate(3500)

Question 39208: Find the coordinaes of the vertex of the graph y=|x-2|+4.
Click here to see answer by Nate(3500)

Question 39205: Rewrite the equation y=-6/5x + 3/2 in standard form with integer coefficients.
Click here to see answer by longjonsilver(2297)

Question 39207: Solve the inequality |x - 1/2| > or = 2/3.
Click here to see answer by longjonsilver(2297)

Question 39278: Suppose that for some function f, f(x-1)=5x. Find f(6).
Click here to see answer by josmiceli(9817)

Question 39285: Cost of material. A rectangular box with volume 320ft^3 is built with a square base and top. The cost is $1.50/ft^2 for the bottom, $2.50/ft^2 for the sides, and $1/ft^2 for the top. Let x=the length of the base, in feet.
a) Express the cost of the box as a function of x.
b) Find the domain of the function.
Click here to see answer by stanbon(57967)

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, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 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