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

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Question 1109807: let f(x)= x+1/(x-4)^2
Click here to see answer by Alan3354(69443) About Me 

Question 1109814: A company producing CDs for home computers finds that the total daily revenue for selling x items at p dollars per item is given by R(x) = 9x − 0.01x^2. Use the fact that R = xp and your knowledge of factoring to find a formula that gives the price p in terms of x.
p = ?

Use the formula to find the price they should charge if they want to sell 420 items per day.

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Question 1110212: Please help me solve: |3x-7| > -2
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Question 1110212: Please help me solve: |3x-7| > -2
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Question 1108428: If sqr(6+4sqr2) = sqrx + sqry, x and y are rational, find x and y
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Question 1110295: Evaluating expression. My textbook has two problems; b^2 (squared) and (b)^2 where b is -2, to show apply exponent first and then apply the - sign so you get -4 in the first case. The second case is the (-2)^2, so you get +4 since the - sign is enclosed so you apply the - sign value to the squaring. Later on the page it has 3b^2 (squared). So I read this as 3 times b^2, so it would be 3 times -2^2. Which would be; square the 2, apply the - sign and multiply by 3. 3(-4)= -12
Other people say the answer is -2^2 to get +4 and then multiply by 3.So 3(+4)=+12 If the first example shows to apply the exponent before negation, then shouldn't the question be written "evaluate 3(b)^2? to get +12?

Click here to see answer by greenestamps(13203) About Me 

Question 1110871: You have some $1 and $5 bills. You have a total of 39 bills that value $131. How many of each type of bill do you have?
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Question 1111415: If the sum of 4 times a number and -8 is 60 then the number is
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Question 1112044: Suppose that the area of square lawn is d^2-30d+225. What is the length of one side of the lawn?
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Question 1112044: Suppose that the area of square lawn is d^2-30d+225. What is the length of one side of the lawn?
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Question 1112352: the sum of a number and its multiplicative inverse is five times the number.
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Question 1112638: Christia is standing on the top of the head of John's shadow. If she is 5 feet tall and his height is 6 feet, and the length of their shadow is 15 feet, find the length of Christia's shadow.
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Question 1112635: how high would a 10 feet ladder reach a side of a building if the ladder is 60 degrees above the ground?
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Question 1112637: A boulder stops a surveyor from directly measuring the boundary AB of a piece of land. He measures AC=500 feet and extends it 10 feet to a point D. BC turns out to be 600 feet and extending it 12 feet to reach point E. What is the length of AB if ED is 8 feet?
Click here to see answer by KMST(5328) About Me 

Question 1112923: evaluate f(g) = 3g^2 - 4g + 5 for g =-5
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Question 1112923: evaluate f(g) = 3g^2 - 4g + 5 for g =-5
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Question 1112922: Evaluate g(h) = -4h^2 - 2h + 6 for h= -2
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Question 1112927: Find the product of 2xy + 3 and x-4
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Question 1112927: Find the product of 2xy + 3 and x-4
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Question 1113409: Jason is going bowling with his friends. He rents bowling shoes for a one-time fee of $4.50. Jason then needs to pay $4.00 per game of bowling. Write an expression that represents the total cost, in dollars to rent the bowling shoes and bowl g games
Click here to see answer by amalm06(224) About Me 

Question 1114254: Suppose that the functions f and g are defined for all real numbers x as follows
F(x)= x-3
G(x)= 3x^2
Write expressions for (f•g)(x) and (f+g)(x) and evaluate (f-g)(3)

Click here to see answer by Fombitz(32388) About Me 

Question 1114610: (4x^2)(7)
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Question 1115054: Please help me answer this question:
a) Write the expression below using a single index:
+SQRT%28x%5E10+%2A+x%5E-4%29+%2F+%28x%5E1%2F3+%2A+%5E6SQRTx%5E10+

Click here to see answer by Alan3354(69443) About Me 

Question 1115091: Please help me answer the following question:
write the expression below using a single index,
√((x^16*x^(-4))/(x^(1/3)* ∛(x^5 )))

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Question 1115444: please help me simplify this expression as far as possible:
+S=%28v%5E3t%5E2-v%5E2t%5E2%29%2Fv%5E2t+

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Question 1116215: if f(x)=X^2-6x + 2 and g(x)=-2x, find the following composition.
(g f)(-1)

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Question 1117436: I don't know if this question would fall into this topic, but can someone help me? I'm self-reviewing for my college entrance exam which is already coming, and I encountered this problem in a book I'm reading.
Use set-builder notation to represent set D = (red, blue, yellow).
My answer was: D = (red, blue, yellow | red is a primary color). Is this one correct or?
Another one from the rule method problem is:
Use the rule method to represent (April, June, November, September).
My answer was: A is the set of months of the year.
Roster method and Rule method are kind of easy to understand for me, but I get quite confused when it comes to set-builder notation. Hoping that you could help me. Thank you in advance! :D

Click here to see answer by ikleyn(52832) About Me 

Question 1118252: Perform the indicated operation.express your answer in simplest form 5/12+1/4+1/18=?
Click here to see answer by rothauserc(4718) About Me 
Question 1118252: Perform the indicated operation.express your answer in simplest form 5/12+1/4+1/18=?
Click here to see answer by MathTherapy(10555) About Me 

Question 1118354: (11+3)a-(a-5)

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Question 1118360: Ok, this may sound absurd, but it makes a difference.
If: x = 3/4, and the expression is (12x^2), how should that be written?
I've tried it numerous ways:(12(3/4)^2), and (12 3/4^2).
Each way produces a drastic result.
Thank you!

Click here to see answer by josgarithmetic(39623) About Me 
Question 1118360: Ok, this may sound absurd, but it makes a difference.
If: x = 3/4, and the expression is (12x^2), how should that be written?
I've tried it numerous ways:(12(3/4)^2), and (12 3/4^2).
Each way produces a drastic result.
Thank you!

Click here to see answer by greenestamps(13203) About Me 
Question 1118360: Ok, this may sound absurd, but it makes a difference.
If: x = 3/4, and the expression is (12x^2), how should that be written?
I've tried it numerous ways:(12(3/4)^2), and (12 3/4^2).
Each way produces a drastic result.
Thank you!

Click here to see answer by Alan3354(69443) About Me 

Question 1118571: Question on evaluating expressions:
The expression is 30x2^y
x=-2/5 and y= 5/8
I believe it should be solved as follows:
30-(2/5)^2 x 5/8 which = 299/10
Is this the correct way to evaluate the expression? I've never seen one like this before so I'm guessing.
Thank you!

Click here to see answer by t0hierry(194) About Me 

Question 1118570: Good morning,
Quick question about fractions in expressions. The question is as follows:
If x=-2/5 and y=5/8
What is: 30x^2y?
I believe it should be solved like this:
30 -(-2/5)^2 x 5/8
which gives and answer of: 299/10
Am I evaluating this correctly?
Thank you!

Click here to see answer by t0hierry(194) About Me 
Question 1118570: Good morning,
Quick question about fractions in expressions. The question is as follows:
If x=-2/5 and y=5/8
What is: 30x^2y?
I believe it should be solved like this:
30 -(-2/5)^2 x 5/8
which gives and answer of: 299/10
Am I evaluating this correctly?
Thank you!

Click here to see answer by greenestamps(13203) About Me 

Question 1118752: In the quadratic equation
x^2 + mx + 2=0, the roots are
consecutive. Find the values of m .

Click here to see answer by josgarithmetic(39623) About Me 
Question 1118752: In the quadratic equation
x^2 + mx + 2=0, the roots are
consecutive. Find the values of m .

Click here to see answer by ikleyn(52832) About Me 

Question 1118753: Find values of n in the equation
2x^2 - 5(n-1)x +12=0 if the
two roots are consecutive.

Click here to see answer by josgarithmetic(39623) About Me 
Question 1118753: Find values of n in the equation
2x^2 - 5(n-1)x +12=0 if the
two roots are consecutive.

Click here to see answer by ikleyn(52832) About Me 

Question 1118764: solve for 0<=x<=360
sinx=cos^2x-1

Click here to see answer by Theo(13342) About Me 

Question 1118910: (2x+3)(2x-3) =

Click here to see answer by josgarithmetic(39623) About Me 
Question 1118910: (2x+3)(2x-3) =

Click here to see answer by solver91311(24713) About Me 

Question 1119005: The length of a rectangle is 6 inches more then the width. The perimeter is 28 inches. Find the length and width or the rectangle
Click here to see answer by josgarithmetic(39623) About Me 

Question 1119267:

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