Questions on Algebra: Equations answered by real tutors!

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Question 106863: is (-1,2) a solution of y= 1/2x-1?
Click here to see answer by Earlsdon(6287)

Question 106870: x-4y=8
Click here to see answer by checkley75(3666)

Question 106867: find the order-pair solution of y=-3x + 1 that corresponds to x=0
Click here to see answer by tutorcecilia(2152)

Question 106930: three is added to a number, and then the sum is multiplied by 4.The result is 16.What is the number.
Click here to see answer by an(14)

Question 106930: three is added to a number, and then the sum is multiplied by 4.The result is 16.What is the number.
Click here to see answer by Fombitz(13828)

Question 106933: Hi please help me with this
X-1/3 + x+2/6=6
Note that / is upon

Click here to see answer by checkley75(3666)

Question 106953: Please help me solve X^3-5x^2-4x+20
Click here to see answer by checkley75(3666)

Question 106951: 5/6c=30 21/2n=45 10/3w=50

please help me i do not know how to do fraction equations
Click here to see answer by checkley75(3666)

Question 106951: 5/6c=30 21/2n=45 10/3w=50

please help me i do not know how to do fraction equations
Click here to see answer by MathLover1(6638)

Question 106959: Find the three consecutive numbers such that the sum of double the first and the third totals 362
Click here to see answer by checkley75(3666)

Question 106959: Find the three consecutive numbers such that the sum of double the first and the third totals 362
Click here to see answer by cheesey(22)

Question 106955: Please help me with this x^2+8x+12
Click here to see answer by checkley75(3666)

Question 106954: Please help me with this problem x^2-x-12
Click here to see answer by checkley75(3666)

Question 106903: The sum of the ages of the three Romano brothers is 63.if their ages can be represented as consecutive integers,what is the age of the middle brother?
Click here to see answer by faizan(1)

Question 106986: 0.5x=300-x
solve for x
Click here to see answer by checkley75(3666)

Question 107053: how do you solve 3\2x+1 + 3\ 2x-1= 8x\4x^2-1?
Click here to see answer by HyperBrain(694)

Question 106871: determine whether the equation is an identity, a conditional equation, or an inconsistant equation.
(-7x+2)/3 + 4/3 = (-7x/2)
Click here to see answer by HyperBrain(694)

Question 107073: In any triangle, the sum of the measures of the angles is 180 degrees. In Triangle ABC, angle A is three times as large as angle B and also 16 degrees larger than angle C. Find the measure of each angle.
Click here to see answer by Annabelle1(69)

Question 107074: In triangle ABC, AB is 9 cm. shorter that AC, while BC is 3 cm. longer than AC. If the perimeter of the triangle is 48 cm. find the lengths of the three sides.
Click here to see answer by Annabelle1(69)

Question 107075: Kindly please answer this question and thank you in advance:

In triangle ABC, AB is 9 cm. shorter than AC, while BC is 3 cm. longer than AC. If the perimeter of the triangle is 48 cm. find the lengths of the three sides.
Click here to see answer by blueskyy(3)

Question 107082: 7Kindly help me answer this problem.
In isosceles trapezoid ABCD, the longer base, AB, is one and one half times as long as the shorter base, CD. The other two sides, AD and BC, are both 13 cm. long.
a. If the perimeter is 76 cm. find the lengths of AB and CD.
B. If the height of the trapezoid is 12 cm. find its area.
(Hint: Area= 1/2 x height x sum of base length)
Click here to see answer by Annabelle1(69)

Question 107090: Please help me on this problem. Many Thanks.

Theo has $5 more than Denise and Denise has $11 more than Rudy. Together they have $45. How much money does each have?
Click here to see answer by Annabelle1(69)

Question 107143: Please help me find
Find the missing coordinates
y=-x+4
Thanks
Click here to see answer by edjones(7569)

Question 107146: 2/3x - 2/3 = 0
Solve the equation
Click here to see answer by edjones(7569)

Question 107147: 1/3 (x + 6) = 1
Solve the equation by simplifiing both sides and isolating the variable
Click here to see answer by MathLover1(6638)

Question 107148: 4 = 2/3x + 9+ 1/3x
Solve the equation by simplifiing both sides and isolating the variable
Click here to see answer by edjones(7569)

Question 107148: 4 = 2/3x + 9+ 1/3x
Solve the equation by simplifiing both sides and isolating the variable
Click here to see answer by stanbon(57387)

Question 107149: North carolina's Native American populaton is 22,000 greater than New York's. New York's Native American population is 187,000 less than Oklahoma's. If the total population of all three is 437,000, find each state's Native American population.
Click here to see answer by Fombitz(13828)

Question 107175: -(x-1)+4x = -5
Click here to see answer by checkley75(3666)

Question 107176: -(x-1)+4x = -5
Click here to see answer by checkley75(3666)

Question 107218: Rewrite the equation so that y is a function of x
1+7y=5x-2
Click here to see answer by stanbon(57387)

Question 107163: please help me with this problem
ive been working on it for 15 min already
the problem is
2(x-4)=22
i have to solve for x
i cant get the anwser at all
Click here to see answer by bucky(2189)

Question 107211: What is the solution to the system of equations:
2x +5y + 2z = 6
5x - 7y = -29
z = 1
I have tried this:
SUBSTITUTION
2x + 5y + 2(1) = 6
2x + 5y = 4
I have tried to solve for y using these equations:
2x + 5y = 4
5x - 7y = -29
MULTIPLY BY 2.5
5x + 7.5y = 10
I have tried to solve for y using these equations:
5x + 7.5y = 10
5x - 7y = -29
ELIMINATION
14.5y = 39
This would show that y > 2, but upon checking the answers from a resource (This is not a section of the textbook I am using), the answer is in fact, 2. Would you help me see where I made a mistake?

Click here to see answer by Annabelle1(69)

Question 107145:
Solve the equation
Click here to see answer by Joeshie(9)

Question 107228: -25+4(2x-5)=-61
Click here to see answer by scott8148(6628)

Question 107207: 3/4(3X+1)=2(3-2X)=1

Click here to see answer by Joeshie(9)

Question 106025: IF THE SIDES EQUAL A A 2A 2A D AND D IN A SHAPE WHAT WOULD THE EQUASION BE FOR THE PERIMITER IN ITS SIMPLEST FORM
Click here to see answer by Joeshie(9)

Question 107304: Solve and check each of the following equations for x.
3/x = 5/3 – 7/x

Click here to see answer by jim_thompson5910(28598)

Question 107352: i need to solve for y in this equation
thank you in advance
y+5-4y=-10
Click here to see answer by T. Kidder(2)

Question 107384: 4(2x-3)=3x+13
Click here to see answer by Annabelle1(69)

Question 107345: Find the coordinates of the midpoint of a segment with the pair of endpoints
(-7.-6). (-8.8)
a. (1/2, -7) b. (-1,-16) c. (-15/2,1) d. (-13/2,0)
Click here to see answer by bucky(2189)

Question 107339: I believe I have this correct. Can you please check it for me.
3x^2+5x-3=x
3x^2+5x-3-x=0
3x^2+4x=3
Thank You
Click here to see answer by bucky(2189)

Question 107347: Find the coordinates of the midpoint of a segment with the pair of endpoints
(11 1/2, 0), (-11 1/2, 0)
a. (0,0) b. (0 1/2, 0) c. (-1 1/2, 0) d. (11, 0)

Click here to see answer by Fombitz(13828)

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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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