Questions on Algebra: Evaluation of expressions, parentheses answered by real tutors!

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Question 1039488:
The table below gives the value of a car over two years. Using an exponential best-fit model, after how many years is the car valued at 45% of the original value?
Year 0 0.5 1.0 1.5 2.0
Value ($) 15,500.00 14,560.00 13,911.20 12,969.66 12,204.09

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Question 1039558: Which expression is equivalent to 2x^2-2x+7
a) (4x+12)+(2x^2-6x+5)
b) (x^2-5x+13)+(x^2+3x-6)
c) (4x^2-6x+11)+(2x^2-4x+4)
d) (5x^2-8x+120)+(-3x^2+10x-13)

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Question 1039662: Xy,forx=3andy=f
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Question 1039716: The number of months in 7 years
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Question 1039715: The value of cents in q quarters
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Question 1039896: Solve x:
8^x multiplied by 16^3x = 4
How do you find x?

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Question 1039897: A (0,16), B(8,0) C(0,6) D(18,0)
Point M is the point of intersection between line AB and line CD. Find M.

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Question 1039904: Factorise: (1-d)(x+2) - (1-d)(x+3)
What is the quickest way to do this?

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Question 1039905: Simplify: cuberoot (8x/y^3)
I don't know what to do because the x isn't cubed, so it's not 2x/y??

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Question 1039947: help on (5/6)^2*12/15
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Question 1040064: A store was selling movies that originally cost $19.95 with a $5 discount. Mia bought five of them.what was the total cost? Write an expression and solve.
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Question 1040318: Use the distributive property to write the expression 1/2 (4x-6y) without parentheses.

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Question 1040322: If 2c=-1, then (4-4c)^2=
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Question 1040324: If x=-2, which of the following is not an expression for zero?
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Question 1040327: If x=-2, which of the following is not an expression for zero? .
A)0/x
B)x^2-4
C)x+(-x)
D)x-2

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Question 1040326: If x/y=m and xy does not equal zero, then x-y/y is equal to ?
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Question 1040326: If x/y=m and xy does not equal zero, then x-y/y is equal to ?
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Question 1040349: How many items are in each box if 900 items are divided: among three boxes such that the first box contains half of the second box while the third box contains thrice of the first box?
Click here to see answer by Theo(13342) About Me 

Question 1040537: If a rectangle ABCD is drawn in the xy-coordinate plane, what is the product of the slopes of the sides AB, BC, CD, and DA?
A)-1
B)-1%2F2
C)1%2F2
D)1

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Question 1040779: what are the solutions to 4%28x-2%29%5E2-1=5
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Question 1040786: (k-1)x+3k=ax+24
If the equation above is true for all values of x, where k and a are constants, what is the value of a ?

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Question 1040787: which of the following polynomials has a factor of x-1?.
A) p%28x%29=x%5E3%2Bx%5E2-2x%2B1
B) q%28x%29=2x%5E3-x%5E2%2Bx-1
c) r%28x%29=3x%5E3-x-2
D) s%28x%29=-3x%5E3%2B3x%2B1

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Question 1040787: which of the following polynomials has a factor of x-1?.
A) p%28x%29=x%5E3%2Bx%5E2-2x%2B1
B) q%28x%29=2x%5E3-x%5E2%2Bx-1
c) r%28x%29=3x%5E3-x-2
D) s%28x%29=-3x%5E3%2B3x%2B1

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Question 1041106: Simplify: (12x^4 times 4x)/-3x^-2
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Question 1041177: Simplify the index number:
16^-0.75
Thanks in advance.

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Question 1041180: solve 3/11 - x/121 =-1/142
Thanks so much.

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Question 1041179: Solve 12root3 + 2root3x = 4root6
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Question 1041179: Solve 12root3 + 2root3x = 4root6
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Question 1041179: Solve 12root3 + 2root3x = 4root6
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Question 1041178: Given the equation X = 1/x^2 - 1/y,
find y when X = 1 3/4, x=1/2

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Question 1041493: Evaluate 2x+y
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Question 1041576: simplfy %28m%5E2%29%2F%28m%5E2-m%29-%283m-2%29%2F%28m%5E2-m%29=
A)%28m%2B2%29%2F%28m%29
B)%28m-2%29%2F%28m%29
C)%28m%2B1%29%2F%28m%29
D)%28m-1%29%2F%28m%29

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Question 1041734: Simplify each of thr following: ( remember exponents should be postive)
48x^4/6x^11

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Question 1041830: Solve for x: 4%2F%28x-5%29-2%2F%28x%2B5%29=2%2Fx
A) 2/5
B) -5/3
C) -5
D) No Solution

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Question 1041829: Solve for b: 2b%2F%285%2Bb%29-1%2F%285-b%29=10%2F%28b%5E2-25%29
A) 5
B) {-1/2 , 5}
C) -1/2
D) No solution

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Question 1041844: Solve for x:%284x%2B3%29%2F%28x-6%29%2B%28x-4%29%2F%286-x%29=44%2F%282x-12%29
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Question 1041844: Solve for x:%284x%2B3%29%2F%28x-6%29%2B%28x-4%29%2F%286-x%29=44%2F%282x-12%29
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Question 1041978: Find the value of k if the lines 2x-3y=5 and 6x-(k+1)y =1 are perpendicular
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Question 1042050: If g(x)=2x-4 and f is the function defined such f(g(x))=x, then f(x)=
A) -2x+4
B) x-2
C) %28-1%2F2%29x-2
D) %281%2F2%29x%2B2

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Question 1042048: If i%5E%28x%2B2%29%2Bi%5E%28x%29%2Bi%5E%28x-2%29=1, then what is the value of x? (Note: i=sqrt%28-1%29 )
A)0
B)1
C)2
D)3

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Question 1042048: If i%5E%28x%2B2%29%2Bi%5E%28x%29%2Bi%5E%28x-2%29=1, then what is the value of x? (Note: i=sqrt%28-1%29 )
A)0
B)1
C)2
D)3

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Question 1042048: If i%5E%28x%2B2%29%2Bi%5E%28x%29%2Bi%5E%28x-2%29=1, then what is the value of x? (Note: i=sqrt%28-1%29 )
A)0
B)1
C)2
D)3

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Question 1042131: Solve I=PN%2F%28RN%2BA%29 for N
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Question 1042205: 4cd
if
c = -4 and d = 3

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Question 1042252: %28a%5Ex%29+%28a%5Ey%29=1 and a does not equal to plus or minus 1, what is the value of x+y?
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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