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

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Question 831468: You and five friends go to a movie. The tickets cost $6.75 each. You each buy a drink for $2.25 and a box of popcorn for $4.00. Write an expression that represents the total amount of money spent.
Click here to see answer by hovuquocan1997(83) About Me 

Question 831535: Please help me solve this expression; (xy+3)^2 x=2 y=5
This is what I have tried....(5)^2 x (2)^2 + 3
25 x 4 = 100+3=103
103 x 2 = 206
But the answer is 169...I want to understand how they got this answer so I can move on with my homework....Please help me understand...Thank you

Click here to see answer by JulietG(1812) About Me 
Question 831535: Please help me solve this expression; (xy+3)^2 x=2 y=5
This is what I have tried....(5)^2 x (2)^2 + 3
25 x 4 = 100+3=103
103 x 2 = 206
But the answer is 169...I want to understand how they got this answer so I can move on with my homework....Please help me understand...Thank you

Click here to see answer by KMST(5328) About Me 

Question 831580: Find all valves k so that the natural domain of the following function is all real numbers.
h(x)= t-1/t^2+kt+4

Click here to see answer by stanbon(75887) About Me 

Question 831801: The Length of a rectangle is 7 feet less than 4 times the width.
Find the length and the width of the rectangle if the area is 36 square feet
Let w = the width of the rectangle
-------------------------
Write and expression for the length of the rectangle in terms of w
l =
Since the area of the rectangle is given by the formula A =lw, write an expression for the area A of the rectangle in terms of w.
A =
Set up and solve an appropriate equation and find the width
The width w = (blank) feet. The length l = (blank) feet.
Thank you so much in advance, my son and i cant figure out how to do this problem.

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Question 832058: t=an+b(for b)
Click here to see answer by jim_thompson5910(35256) About Me 

Question 832577: (2/5+3/8)-3/20
I'm having a hard time trying to solve this problem I keep getting the wrong answer

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Question 832577: (2/5+3/8)-3/20
I'm having a hard time trying to solve this problem I keep getting the wrong answer

Click here to see answer by KMST(5328) About Me 

Question 832818: The height of a rectangular box is 4 times its width, and its length is 5 ft. more than its width. The volume of the box is 125 ft^3. Find the width of the box. Round your answer to two decimal places.
Click here to see answer by josgarithmetic(39623) About Me 

Question 832862: Sung is going to rent a truck for one day. There are two companies he can choose from, and they have the following prices.
Company A charges $89 and allows unlimited mileage.
Company B has an initial fee of $75 and charges an additional $0.70 for every mile driven.
For what mileages will Company A charge less than Company B?
Use M for the number of miles driven, and solve your inequality for M .

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Question 833098: a/b-b/a=a-b/ab why is this false?
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Question 833126: 3^x=12
How do you find the value of this

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Question 833276: Here's the problem
(1/2) to the 4th power + 5+4 divided by 3
This is what I have so far
1/16 + 9 divided by 3, I get 4/16, however the answer is 49/16 and I don't know how to get there
Help

Click here to see answer by ankor@dixie-net.com(22740) About Me 

Question 833649: First has estimate the answer. Then subtract to find the exact answer? I need help?
(22 4/9)-(3 9/15)=

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Question 834313: Here is a picture of the question

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Question 834421: Please help me I'm not good with word problems I just need help setting it up and I can take it from there.
Four times a number is 21 more than the number. What is the number?

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Question 834518: x=2,y=-3,and z=5,4xy evaluate expressions
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Question 834903: Please help me solve the each expression for the given value(s) of the variable(s)
4(b-4);b=5

Click here to see answer by jim_thompson5910(35256) About Me 

Question 835497: x/8+12=16
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Question 835495: 7b for b=5
what is the answer and how do i show my work

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Question 835511: evaluate 90 * x - 90 * 12 when x=10
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Question 835761: please help me simplify the expressions if possible
A. 5n/10n B. 5+n/10+n

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Question 835597: evaluate the following expression when x=3 and z=1 with the expression of z/3x
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Question 835995: Add & Subtract Mixed Number
First estimate the answer. Then subtract to find the exact answer.
13(3/4)- (-2)(9/10)=
Please help me!

Click here to see answer by richwmiller(17219) About Me 

Question 835997: Add & Subtract Mixed Number
First estimate the answer. Then subtract to find the exact answer.
13(3/4)- (-2)(9/10)=
Please help me!

Click here to see answer by josgarithmetic(39623) About Me 

Question 836033: Four times the smaller of two consecutive odd integers is the same as 73 less than 5 times the larger. Find the integers.
Click here to see answer by JulietG(1812) About Me 

Question 836120: Evaluate 5x^2y^2 when x is 2 and y is 6?
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Question 836255: 3+(3-5)^2/2(-2)
I seemed to get confused on the order of operations in order to evaluate this.
The steps I took were
multiply 2(-2)
Subtract (3-5)^2 then multiply, then divide the answer, but I doesn't seem correct to me.
this is where I've gotten confused. May I please get some assistance?

Click here to see answer by richwmiller(17219) About Me 
Question 836255: 3+(3-5)^2/2(-2)
I seemed to get confused on the order of operations in order to evaluate this.
The steps I took were
multiply 2(-2)
Subtract (3-5)^2 then multiply, then divide the answer, but I doesn't seem correct to me.
this is where I've gotten confused. May I please get some assistance?

Click here to see answer by LinnW(1048) About Me 

Question 836632: Factor the expression.
25x^2(4+x^2)^-3/2 + 6x(4+x^2)^-1/2
I factored by grouping and got x(1+4x^2)^-3/2[25x+6(1+4x^2)^-2] but I don't know where to go from there. Please help!

Click here to see answer by MathLover1(20850) About Me 

Question 838137: Evaluate the expression(2x^17y)^3 for x = –1 and y = 5. for x = –1 and y = 5.

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Question 838081: Let f(x) = (x^2) - 5 and g (x) = (3x^2). Find g(f(x))
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Question 838379: how old is john if 200 reduced by 2 times his age is 16

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Question 838467: Trying to figure out this equation. 7 (4x +2y=14) I've gotten to 14y =98-28x; y=7-2x
Click here to see answer by Alan3354(69443) About Me 

Question 838477: 2(n+8)-3
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Question 838735: hello I wanted to know if this problem is correct 4m+9 substitute m:4x12+9 compute:48+8=48
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Question 838735: hello I wanted to know if this problem is correct 4m+9 substitute m:4x12+9 compute:48+8=48
Click here to see answer by Fombitz(32388) About Me 

Question 838782: [15+(3*1)]3/4
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Question 838983: -3(-3a)(6b)
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Question 839128: -6X+5=3x-3
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Question 839406: 7^5/7^3
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Question 839728: 5+7(w+4)+w=
Click here to see answer by Phillips54(20) About Me 

Question 840562: I need an expression that represents the statement "21 more than a number".
Click here to see answer by Fombitz(32388) About Me 

Question 841338: evaluate this expression when is = 7 a = 5 m = 3 and t = 4
Click here to see answer by Fombitz(32388) About Me 

Question 841517: I need help with this. Still not getting the right answer for this particular problem. 9 to the 2nd power -6(-4) divided by 8
Click here to see answer by josgarithmetic(39623) About Me 

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