Questions on Algebra: Expressions involving variables, substitution answered by real tutors!

Tutors Answer Your Questions about Expressions-with-variables (FREE)

Question 49852: I need some help in this numerical expression; evaluating numerical expressions: [(7-4)^2+3]15
Click here to see answer by tutorcecilia(2152)

Question 49950: 2x+y=4
-2x+2y=12
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Question 49947: One endpoint of a segment is (12,-8). The midpoint is (3,18) Find the coordinates of the other endpoint.
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Question 50114: p^19p^4/p^6
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Question 50080: What would an algebraic expression for two fifths the cube of a number?
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Question 50078: variables and expressions....
evaluate this espression=base 11 exponent 2
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Question 50079: What would an algebraic expression for two fifths the cube of a number?
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Question 50052: Kyle had 36 books in his locker. Some were library books, some were textbooks, and the rest were telephone books. The number of library books and telephone books combined equals twice the number of textbooks. The number of textbooks and telephone books combined equals three times the number of library books. How many of each type of book were in Kyle's locker?
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Question 50145: How TO TRANSLATE EACH ALGEBRAIC EXPRESSION INTO WORDS
a+6
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Question 50248: i need help on the problem -10a(2-a)
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Question 50248: i need help on the problem -10a(2-a)
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Question 50190: x+3
---- =3
2
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Question 50330: I am in college and im barely starting algebra and i dont know how to solve any problems at all. so i was wondering if you could help me. they go like this 5x-1/3 or like 2/x + 5x to the fourht powere -y. so as soon as you could help me please contact me back. ty =)
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Question 50328: Evaluate the expression for the given values of the variables.
5x+2 over y, when x=-2 and y=-4
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Question 50329: Simplify the expression: -15x divided by 3
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Question 50466: If you could please help me! I forgot how to do expressions
21-13+8=
thank you
logan
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Question 50430: 3(10-6)cubed + 15
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Question 50424: How do you define a variable & write an algebraic expression for
10 plus the quotient of a number and 15? Thank you!! I need this asap!!!!
This is a Study Guide & Practice Workbook Prentice Hall Mathematics Algebra 1
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Question 50511: Simplify the variable expression:8(-t)(-t)
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Question 50512: Simplify the variable expression:-4(a)(-a)(-a)
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Question 50514: Simplify the variable expression: (5)(-w)
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Question 50410: Hi, I need help solving this solution.
If P divided by 5=Q, then P divided by 10=
Thank You
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Question 50516: I am working with Translating Sentences into Equations for algebra 1, twice a number is 12 more than five times the number can you help?
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Question 50303: x= 12 y=8 z=3

(x/y)2 -3y-z/(x-y)2 =

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Question 50570: Please help me solve this equation 1/a+1/b=1/c solve for c look so easy but I can't solve it...
Thank you!
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Question 50599: Evaluate the algebraic expression 5ac/2(ca) if a =6 and c= 8?
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Question 50622: Simplify the expression completly: (12m + 4n)+(3m+7n)?
If you had 450 dollars in your bank account that pays interest at 3% annually how much will you have after 2 years?
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Question 50720: what is the product of 5 and m plushalf of n written in an algebraic expression?
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Question 50770: if x is any interger, then 1.x=x.so when you see x in a p0roblem you can change it to 1x. you can also change a to 1a,a2 to 1a2,xy to 1xy,etc. so what,s 8a+a=
Click here to see answer by stanbon(57967)

Question 50721: what is 49 in creased by twice a number when it is written in an algebraic expression?
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Question 50786: What is four less than the product of 6 and a number is eight
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Question 50825: I think I'm just confused by the terminology. Saxon asks to solve the following by "elimination" to solve equivalent fractions, but with only positive numbers on the variable side, I can't get the problem to work out as in their examples - each of which has at least one negative number.
a. 4y + 3x = -7 and 3y + 2x = -6
They say to multiply each equation by one of the variable terms from the other...i.e. multiply first one by 2x and the other by 3x....doesn't work out. ?????? I end up with a plus 6x in both rather than a +6x and a -6x which would cancel out each other, leaving room to solve for y.
I'm missing something......:-(
Rebecca
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Question 50835: Solve for y in the following equations:
1. 25x-5y=15
y=_______

2. 18x+6y=(-12)y
y=_______

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Question 50877: factor completely: 2x^2-12x+18
factor completely: 2x^2-9
factor completely: 2x^3+6x^2-x-3

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Question 50892: A jar contains 40 coins consisting of dimes and quarters and having a total value of $4.90. How many of each kind of coin are there?
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Question 50900: There are two containers that contain bacteria cells. The bacteria will double its numbers every 20 minutes. One container has 100 cells and the other contains 250 cells. Write an expression that shows the above information.
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Question 49854: on the last message i meant this: evaluate the expression:
[(7-4)^2+3]+15
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Question 50876: three times the quantity of 2 plus a
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Question 50929: simplify (X + 2p)^3 - (X - 2p)^3
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Question 50929: simplify (X + 2p)^3 - (X - 2p)^3
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Question 50970: Please write the varible sentance(s) as an equation or an inequality.
1.a number "T" is increased by the sum of seven and the square of another number is ten.

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Question 50977: Im trying to combine like terms
(2x squared -x+3) + (x squared +3x+4)
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Question 50983: A pool measures 20 feet by 30 feet. It is surrounded by a walkway which is same width around the rectangular pool. With the walkway, the area is 1500 square feet. What is the width of the walkway?
(a teacher generated question, not from textbook.)
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Question 50620: Evalute the algebraic expression 5ac/2(c-a) if a = 6 and c = 8?
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Question 51045: can you please help me solve for the variable in the following m+2=m-1 and 3n+5=2n-2 and give me a brief explaination on how u solve them.
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