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

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Question 1093898: Please explain, simplified expressions. -(k^2-k-6)

Click here to see answer by Alan3354(69443)

Question 1094010: Rectangle ABCD has a length represented by the expression 2x-3 and a width represented by the expression 4x-5. Rectangle PQRS has a length represented by the expression x-1 and a width represented by the expression 3x+2. Which of the following expressions can be used to represent the difference in the perimeters of Rectangle ABCD and Rectangle PQRS?
Click here to see answer by Theo(13342)

Question 1094427: What is the order of -3, -6/5, 0.75, √6, √25 from least to greatest?
Click here to see answer by Alan3354(69443)

Question 1094427: What is the order of -3, -6/5, 0.75, √6, √25 from least to greatest?
Click here to see answer by ikleyn(52831)

Question 1094415: Evaluate xy-z^2 for x=-8, y=4, and z=2
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Question 1094625: Given that x * y = 4x-2y find the value of (2 * 3) * 4
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Question 1094625: Given that x * y = 4x-2y find the value of (2 * 3) * 4
Click here to see answer by greenestamps(13203)

Question 1094698: Perform the indicated operations and simplify this expression:
(6r^2-7r-3)/(r^2-1) + [(4r^2-12r+9)/(r^2-1)] * (2r^2-r-3)/(3r^2-2r-1)
----------
A. 1
B. (2r-3)^2/(3r+1)
C. (r+1)/(r-1)
D. (r-1)/(r+1)
Click here to see answer by Edwin McCravy(20060)

Question 1094822: A typist figures out that if she types 2 pages above her work quota daily, she will complete her work 3 days ahead of schedule, and if she makes 4 pages extra per day, she will finish 5 days ahead of time. How many pages does she have to type and in how many days?
Please show full solution, and solve algebraically.
Thank you!
Click here to see answer by ikleyn(52831)

Question 1095049: Please help me write an algebraic rule for raising a power to a power that starts with (m*n^x)^y.
Click here to see answer by Alan3354(69443)

Question 1095752: Fenella competed in a chess tournament with 256 entrants. In each round of competition, half of the entrants were eliminated. At the end of one round,there were 32 entrants left. Which equation could be used tp find which round, r, this would be?
A. 256=(1/2)^r
B. (1/2)^r=256/32
C. 25y (1/2)^r=32
D. 1/2 (256r)=32
Click here to see answer by ikleyn(52831)

Question 1095756: A construction crew foreman is buying k two-by-four boards for farming a house. She is also buying j nail guns for the crew. Each board costs 3.75 and each nail gun costs 159.75. The nail guns are on sale with a 20% discount. Which equation could be used to calculate the total amount of her purchase,t?
A. T=3.75k+159.75j-0.2j
B. T=3.75k+159.75j-0.2j(159.75j)
C. T=3.75k+159.75j+0.2j(159.75j)
D. T=3.75k+159.75j-20(159.75j)

Click here to see answer by Theo(13342)

Question 1095778: Find all the solutions to x+√x-2 =4
Click here to see answer by josgarithmetic(39623)

Question 1095776: Find all the equation x+√x-√2 which is equal to 4

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Question 1095913: The new number is the square of five times the original number less four, with two added to that.
Let y be the new number, and x the original number. An algebraic equation that contains the same information is given by:
Click here to see answer by Theo(13342)

Question 1094835: please help:
If 2x=20-(8+16) then find the value of y here
-0717y+733825=x
Click here to see answer by Rhodium(14)

Question 1096285: N=8
Click here to see answer by Alan3354(69443)

Question 1096285: N=8
Click here to see answer by richwmiller(17219)

Question 1096631: The formula for the volume of a cylinder is V = pr2h, where
r�is the cylinder�s radius and h is its height. Solve the equation for h. What
is the height of a cylinder with volume 502.4 cm3 and radius 4 cm?
Click here to see answer by addingup(3677)

Question 1096682: 2x +4y
Click here to see answer by Alan3354(69443)

Question 1096704: Evaluate the expression and leave as simplified fraction:

I solved this way, please see below:
(25 + 32)/-40 = -57/40
Is this correct?
Click here to see answer by Boreal(15235)

Question 1096556: 5x^2+8x-1) + (4x^2+4x+18) - (9x^2-18)
Click here to see answer by Fombitz(32388)

Question 1098357: If sqr(14+8sqr3) = sqrx + sqry, find the value of x and y
Thank you so much!
Click here to see answer by ikleyn(52831)

Question 1098542: 2x-y -1
7x+6y=-6

Click here to see answer by josgarithmetic(39623)

Question 1098542: 2x-y -1
7x+6y=-6

Click here to see answer by greenestamps(13203)

Question 1098551: x2-9x=0

Click here to see answer by ikleyn(52831)

Question 1098551: x2-9x=0

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Question 1098849: 2x-1/x+2=-2/3
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Question 1098849: 2x-1/x+2=-2/3
Click here to see answer by MathTherapy(10555)

Question 1098879: I'd like a detailed answer please. I have seen the solution on this site and I still don't understand how it got to 9y.
if y = (x+8)^2, then (-3x-24)^2 must equal
Click here to see answer by Fombitz(32388)

Question 1099139: what are the expressions that equal -4
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Question 1099208: What is the correct answer for the expression:
2 less than one-third of the points that the Panthers scored
Click here to see answer by josgarithmetic(39623)

Question 1099552: Q. Evaluate the following and express the result in the standard form of rational number:
1. 0.38+1.317
2. 5/6-1/3
3.1/4+3/5
Click here to see answer by Fombitz(32388)

Question 1100014: Amy has a pen 15 cm long that she wants to send as a gift to a friend. She finds a rectangular box in which the pen just fits. The length and width of the box are 5cm and 14cm respectively. What is the height of the box?
Click here to see answer by Boreal(15235)

Question 1100618: Q.write the product .
1. (x+a)(x-b)(x-c)
2. (x+a+b)(x+c-d)
Click here to see answer by Alan3354(69443)

Question 1100615: Q. (x+a)(x-b)(x-c)
Q.(x+a+b)(x+c-d)
Click here to see answer by ikleyn(52831)

Question 1100949: Solve for x :(x+1)exponent2+3x(x+1)exponent2+3xexponent2(x+1)+x exponent3 =0
Click here to see answer by greenestamps(13203)

Question 1102074: pi/2 is what of cylindrical bilayer

Click here to see answer by Alan3354(69443)

Question 1102591: Solve for x:
sqr(5x)-sqr(2x)=3
Click here to see answer by Boreal(15235)

Question 1102585: Write an expression that is equivalent to 49 using each of the following seven numbers and symbols once in the expression: 6 6 6 (an exponent of 2 () + and / (division)
Click here to see answer by greenestamps(13203)

Question 1103492: nine more than the product of 11 and Carlo's score.

Click here to see answer by Alan3354(69443)

Question 1103723: 1) A survey in a college indicates that
32 students study mathematics
30 students study accounting
26 students study finance
13 students study both mathematics and finance
11 students study both accounting and mathematics
16 students study both accounting and finance
6 students study all subjects
Use Venn diagram to determine how many students are enrolled in;
Exactly one
At most two
At least one of the subjects

Click here to see answer by richwmiller(17219)

Question 1103970: One third of the sum of a number and 6 times the number.
Click here to see answer by Fombitz(32388)

Question 1103941: What is the coefficient of x^7 in the expansion of (2x+10)^10 ?
Click here to see answer by Fombitz(32388)

Question 1103967: The sum of a number and 9 added to the difference between the number and 20.
Click here to see answer by Alan3354(69443)

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