Questions on Algebra: Equations answered by real tutors!

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Question 1121971: Solve the formula for the specific variable.
I = Prt for P (finance)
Click here to see answer by josgarithmetic(39617)

Question 1122012: 3/8a-8=13
a=56
but how? how do you get to 56, i discovered that there were 2 ways but im still a little confused.
Click here to see answer by josgarithmetic(39617)

Question 1122028: Find a general form equation for the line through the pair of points and the points are (-6,8) and (1,8)
Click here to see answer by josgarithmetic(39617)

Question 1122036: find only values of p if the tangent to the curve y=px^2-6x-3 is parallel to the line 5x-3y+2=0 at the point where x=-3

Click here to see answer by josgarithmetic(39617)

Question 1122035: find the equation of the normal to the curve y=x^2=4x at the point where x=-3. find the points A and B where the normal cuts the x=axis and y-axis respectively. Hence find the exact length of AB

Click here to see answer by Alan3354(69443)

Question 1122040: find the equation of the normal to the curve y=x^2-4x at the point where x=-3. find the points A and B where the normal cuts the x-axis and y-axis respectively. Hence find the exact length of AB
Click here to see answer by Alan3354(69443)

Question 1122009: Consider a square whose size vaires. Let s represent the side length of the square (in cm) and let P represent the perimeter of the square (in cm).
a. write a formula that expresses P in terms of s.
b. consider the equation 18=4s solve this equation for s.
c. What does this solution represent? Select all that apply
-The side length (in cm) of a square whose perimeter is 18 cm.
-The perimeter (in cm) of a square whose side length is 4.5 cm.
-The square's current side length (in cm).
d. Write a formula that expresses s in terms of p
e. Evaluate your formula from part c for p=18
Click here to see answer by Alan3354(69443)

Question 1122067: half of a number decreased by 8 is -3
Click here to see answer by josgarithmetic(39617)

Question 1122084: I need help with a question?
Click here to see answer by jim_thompson5910(35256)

Question 1122084: I need help with a question?
Click here to see answer by solver91311(24713)

Question 1122101: Consider a square whose size vaires. Let s represent the side length of the square (in cm) and let P represent the perimeter of the square (in cm).
a. Write a formula that expresses P in terms of S
Click here to see answer by ikleyn(52781)

Question 1122103: For each of the following parts, use the given information to write an equation and then solve it.
a.solve y=4x+24 for x if y=7

b. solve
Click here to see answer by josgarithmetic(39617)

Question 1122102: Given the following two equations, solve for y: x=7y-3, x=6 y=?

Click here to see answer by josgarithmetic(39617)

Question 1122145: Heather conducted a poll of 45 people concerning their cookie preferences. 36 people favored chocolate chip and the rest preferred sugar cookies. Based on these results, about how many people out of 1000 can be expected to prefer sugar cookies?
I�m confused on what exactly to do to get the answer.
Thank you,
Click here to see answer by ikleyn(52781)

Question 1122157: Write an equation based on the description and then solve the equation. Be sure to define a variable to represent the value of the unknown number before writing each equation.
a. Some number is equal to one-fifth of the sum of 53, 108.5, and 139. What is the number?
Click here to see answer by solver91311(24713)

Question 1122158: Let's let r represent the radius of the circle (in feet), let d represent the diameter of the circle (in feet), let C represent the circumference of the circle (in feet), and let A represent the area of the circle (in square feet).
e. Write a formula that expresses the circle's area A in terms of its Circumference C
Click here to see answer by solver91311(24713)

Question 1122156: Write an equation based on the description and then solve the equation. Be sure to define a variable to represent the value of the unknown number before writing each equation.
b. The sum of 4 times some number and 20 is 53. What is the number?

Click here to see answer by solver91311(24713)

Question 1122269: Two similar glasses have heights in the ratio 3:5. If, when using the larger glass, it takes 54 glasses of water to fill a fish tank, how many glasses of water would be needed to fill it using the smaller glass?
Click here to see answer by josgarithmetic(39617)

Question 1122292: 90, 56, 42, 43, 58,?
Click here to see answer by greenestamps(13200)

Question 1122302: A box is formed by cutting squares from the four corners of a sheet of paper and folding up the sides. The graph below shows how the volume of the box in cubic inches, V, is related to the length of the side of the square cutout in inches, x.
a. a. The point (0.25,13.813) is on the graph. This means that when the volume of the box is _____ . Cubic inches when the cutout length is _____ inches.
b. When the cutout length is 2 inches, the volume of the box is 30 cubic inches. This means that the point ____is on the graph above.
c. Suppose the largest possible cutout length is 3.5 inches. Over what interval of x does the volume of the box decrease as the cutout length gets larger? (Enter your answer as an interval.)
Click here to see answer by solver91311(24713)

Question 1122436: Find all solutions to x^4 - 7x + 12 =0
Click here to see answer by ikleyn(52781)

Question 1122434: In the following state the restrictions on x
A) y = sqrt(x-6)
B) y= sqrt(2-x)
C) y= 5/4-x
D) y=8/4-x^2
Click here to see answer by josgarithmetic(39617)

Question 1122434: In the following state the restrictions on x
A) y = sqrt(x-6)
B) y= sqrt(2-x)
C) y= 5/4-x
D) y=8/4-x^2
Click here to see answer by Alex.33(110)

Question 1122492: Jason and Renee are 180 feet apart when they begin walking directly toward one another. Jason travels at a constant speed of 3 feet per second and Renee travels at a constant speed of 4.5 feet per second.
a. Write an expression in terms of t that represents the number of feet Jason has traveled since he started walking toward Renee.
b.Write an expression in terms of t that represents the number of feet Renee has traveled since she started walking toward Jason.
c. Write an expression in terms of t that represents the distance between Jason and Renee.
d. How many seconds after the two started walking will the reach each other?
Click here to see answer by ikleyn(52781)

Question 1122499: 105.6 l/h=_____l/min
Click here to see answer by Alan3354(69443)

Question 1122520: Consider the function g(x)=x(11-2x)(13-2x)

a. What is the vertical intercept of g?
b. What are the horizontal intercepts (or "roots") of g?

Click here to see answer by solver91311(24713)

Question 1122526: K=1/2mv^2 solve for v
Click here to see answer by greenestamps(13200)

Question 1122577: Three-Fourths of a number decreased by 10 is greater than or equal to 5
Click here to see answer by solver91311(24713)

Question 1122636: -1/2 -4/8

Click here to see answer by Alan3354(69443)

Question 1122639: Let f be the function that determines the area of a circle (in square cm) given the radius of the circle in cm, r. That is, f(r) represents the area of a circle (in square cm) whose radius is r cm. Use function notation to complete the following tasks.

a. Represent the area (in square cm) of a circle whose radius is 2.1 cm.
Click here to see answer by solver91311(24713)

Question 1122630: I have won the right to build a swimming pool. The pool measures 50 metres in length, 25 metres in width and 2 metres in depth at the shallow end, sloping down (linearly) to 6 metres in depth at the other.
Using the pool measurements above, how many 50mm x 50mm tiles (margin for cement/grouting already included) will be needed, assuming an additional 10% allowance is required for wastage (to the nearest thousand)?
Options are -816,000; -742,000; -75,000; -8,000
Thanks
Click here to see answer by greenestamps(13200)

Question 1122695: 2x+5=24
Click here to see answer by josgarithmetic(39617)

Question 1122726: the cost of a camp is $450 for the first week and $130 for each week beyond the first. The total cost can be modeled by the expression 450 + 130(x - 1). What does (x - 1) represent?
Click here to see answer by ikleyn(52781)

Question 1122572: Edward tells Tom and his brother that any two different gym memberships will eventually have a month in which they are the same cost. So he believes any gym's membership will eventually have a month in which the cost is the same as Platinum Gym's. Describe a membership situation that will make Edward's statement untrue.
Click here to see answer by solver91311(24713)

Question 1122769: Calculate how many liters of gasoline are used in the USA in one day? Assume that there are two cars for every three people, and each car is driven an average of 12,000 mi per year and the average car gets 15 miles per gallon.
Click here to see answer by josgarithmetic(39617)

Question 1122790: FIND VALUES OF X AND Y AND SKETCH GRAPH OF
i) y
=x^2+2
Click here to see answer by Theo(13342)

Question 1122796: Q4 Sketch graph of y=-(x^2-x) with solution.
Click here to see answer by Boreal(15235)

Question 1122794: Sketch graph of following with solution:
ii) y=-x^2-6
iii) y=(x-3)^2+1
iv) y=(x+1)^2-3
v) y=-(x+2)^2+3
vi) y=-(x-4)^2-1

Click here to see answer by Boreal(15235)

Question 1122813: The sum of consecutive integers 1, 2, 3, n is given by the formula 1/2n(n+1)
how many consecutive integers starting with 1 must be added to get a sum of 1225
The integers 1 through ? Need to be added yo get a sum of 1225
Click here to see answer by josmiceli(19441)

Question 1122833: Subscript notation is frequently used for working with larger systems of equations. Use a matrix approach to solve the system. Express the solutions as 4-tuples of the form
(x1, x2, x3, x4).
x1 − 3x2 − 2x3 + x4 = −4
−2x1 + 7x2 + x3 − 2x4 = −2
3x1 − 7x2 − 3x3 + 3x4 = −5
5x1 + x2 + 4x3 − 2x4 = 20
(x1, x2, x3, x4) =

Click here to see answer by Alan3354(69443)

Question 1122795: Q3 i) Factorise x^2+3/4x
ii) hence,sketch graph of y=x^2+3/4x
Click here to see answer by ankor@dixie-net.com(22740)

Question 1122855: factor the sum or difference of two cubes
m^3+27n^3
Click here to see answer by josgarithmetic(39617)

Question 1122869: Subscript notation is frequently used for working with larger systems of equations. Use a matrix approach to solve the system. Express the solutions as 4-tuples of the form
(x1, x2, x3, x4).

x1 + 3x2 − x3 + 2x4 = −9
2x1 + 7x2 + 2x3 − x4 = 44
−3x1 − 8x2 + 3x3 + x4 = −7
4x1 + 11x2 − 2x3 − 3x4 = 36

Click here to see answer by ikleyn(52781)

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, 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, 24976..25020, 25021..25065, 25066..25110, 25111..25155, 25156..25200, 25201..25245, 25246..25290, 25291..25335, 25336..25380, 25381..25425, 25426..25470, 25471..25515, 25516..25560, 25561..25605, 25606..25650, 25651..25695, 25696..25740, 25741..25785, 25786..25830, 25831..25875, 25876..25920, 25921..25965, 25966..26010, 26011..26055, 26056..26100, 26101..26145, 26146..26190, 26191..26235, 26236..26280, 26281..26325, 26326..26370, 26371..26415, 26416..26460, 26461..26505, 26506..26550, 26551..26595, 26596..26640, 26641..26685, 26686..26730, 26731..26775, 26776..26820, 26821..26865, 26866..26910, 26911..26955, 26956..27000, 27001..27045, 27046..27090, 27091..27135, 27136..27180, 27181..27225, 27226..27270, 27271..27315, 27316..27360, 27361..27405, 27406..27450, 27451..27495, 27496..27540, 27541..27585, 27586..27630, 27631..27675, 27676..27720, 27721..27765, 27766..27810, 27811..27855, 27856..27900, 27901..27945, 27946..27990, 27991..28035, 28036..28080, 28081..28125, 28126..28170, 28171..28215, 28216..28260, 28261..28305, 28306..28350, 28351..28395, 28396..28440, 28441..28485, 28486..28530, 28531..28575, 28576..28620, 28621..28665, 28666..28710, 28711..28755, 28756..28800, 28801..28845, 28846..28890, 28891..28935, 28936..28980, 28981..29025, 29026..29070, 29071..29115, 29116..29160, 29161..29205, 29206..29250, 29251..29295, 29296..29340, 29341..29385, 29386..29430, 29431..29475, 29476..29520, 29521..29565, 29566..29610, 29611..29655, 29656..29700, 29701..29745, 29746..29790, 29791..29835, 29836..29880, 29881..29925, 29926..29970, 29971..30015, 30016..30060, 30061..30105, 30106..30150, 30151..30195, 30196..30240, 30241..30285, 30286..30330, 30331..30375, 30376..30420, 30421..30465, 30466..30510, 30511..30555, 30556..30600, 30601..30645, 30646..30690, 30691..30735, 30736..30780, 30781..30825, 30826..30870, 30871..30915, 30916..30960, 30961..31005, 31006..31050, 31051..31095, 31096..31140, 31141..31185, 31186..31230, 31231..31275, 31276..31320, 31321..31365, 31366..31410, 31411..31455, 31456..31500, 31501..31545, 31546..31590, 31591..31635, 31636..31680, 31681..31725, 31726..31770, 31771..31815, 31816..31860, 31861..31905, 31906..31950, 31951..31995, 31996..32040, 32041..32085, 32086..32130, 32131..32175, 32176..32220, 32221..32265, 32266..32310, 32311..32355, 32356..32400, 32401..32445, 32446..32490, 32491..32535, 32536..32580, 32581..32625, 32626..32670, 32671..32715, 32716..32760, 32761..32805, 32806..32850, 32851..32895, 32896..32940, 32941..32985, 32986..33030, 33031..33075, 33076..33120, 33121..33165, 33166..33210, 33211..33255, 33256..33300, 33301..33345, 33346..33390, 33391..33435, 33436..33480, 33481..33525, 33526..33570, 33571..33615, 33616..33660, 33661..33705, 33706..33750, 33751..33795, 33796..33840, 33841..33885, 33886..33930, 33931..33975, 33976..34020, 34021..34065, 34066..34110, 34111..34155, 34156..34200, 34201..34245, 34246..34290, 34291..34335, 34336..34380, 34381..34425, 34426..34470, 34471..34515, 34516..34560, 34561..34605, 34606..34650, 34651..34695, 34696..34740, 34741..34785, 34786..34830, 34831..34875, 34876..34920, 34921..34965, 34966..35010, 35011..35055, 35056..35100, 35101..35145, 35146..35190, 35191..35235, 35236..35280, 35281..35325, 35326..35370, 35371..35415, 35416..35460, 35461..35505, 35506..35550, 35551..35595, 35596..35640, 35641..35685, 35686..35730, 35731..35775, 35776..35820, 35821..35865, 35866..35910, 35911..35955, 35956..36000, 36001..36045, 36046..36090, 36091..36135, 36136..36180, 36181..36225, 36226..36270, 36271..36315, 36316..36360, 36361..36405, 36406..36450, 36451..36495, 36496..36540, 36541..36585, 36586..36630, 36631..36675, 36676..36720, 36721..36765, 36766..36810, 36811..36855, 36856..36900, 36901..36945, 36946..36990, 36991..37035, 37036..37080, 37081..37125, 37126..37170, 37171..37215, 37216..37260, 37261..37305, 37306..37350, 37351..37395, 37396..37440, 37441..37485, 37486..37530, 37531..37575, 37576..37620, 37621..37665, 37666..37710, 37711..37755, 37756..37800, 37801..37845, 37846..37890, 37891..37935, 37936..37980, 37981..38025, 38026..38070, 38071..38115, 38116..38160, 38161..38205, 38206..38250, 38251..38295, 38296..38340, 38341..38385, 38386..38430, 38431..38475, 38476..38520, 38521..38565, 38566..38610, 38611..38655, 38656..38700, 38701..38745, 38746..38790, 38791..38835, 38836..38880, 38881..38925, 38926..38970, 38971..39015, 39016..39060, 39061..39105, 39106..39150, 39151..39195, 39196..39240, 39241..39285, 39286..39330, 39331..39375, 39376..39420, 39421..39465, 39466..39510, 39511..39555, 39556..39600, 39601..39645, 39646..39690, 39691..39735, 39736..39780, 39781..39825, 39826..39870, 39871..39915, 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