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

Tutors Answer Your Questions about expressions (FREE)

Question 330807: Approximate the irrational number with a rational number to two decimal places.
√20
Click here to see answer by Fombitz(13828)

Question 330809: What size is the television screen shown in the illustration? Find d if a = 12 and b = 16.
Click here to see answer by Fombitz(13828)

Question 331100: Simplify the expression, Identify the constants, coefficients,variables of simplfied expression.
(9m^2n - 8mn + 4mn^2) - (7m^2n + 6mn - 7mn^2)
I do not understand this could someone please help me?
Click here to see answer by josmiceli(9661)

Question 331074: -1/2[ 12 + ( 12 - 1)) ]
Click here to see answer by Tutorteddy.Com(12)

Question 331105: Could you please show me how to solve this problem: -3/5[2/3-1/2(3/4-1/2)]
Click here to see answer by aseem(9)

Question 331177: hELP ME SOLVE
x squared - y squared / z-x where x=-3, y=5, and z=-1

Click here to see answer by ankor@dixie-net.com(15638)

Question 331327: solve the formula for the indicated letter
x = w+y+z
-------- for y
5

I am confused on how to do this problem. Please help
Click here to see answer by vleith(2825)

Question 331317: please could someone help me with this question.
evaluate
2x^2 - 4x
____________
x^3 - 7
x= -2
Click here to see answer by checkley77(12569)

Question 331567: x= -3, y=5, z=1
Click here to see answer by Alan3354(30983)

Question 331588: The algebraic steps below describe a number trick. Describe it in words.
1. x
2. x + 7
3. 2(x+7) = 2x + 14
4. 2x +14 - 4 = 2x + 10 = 2(x +5)
5. 2(x+5)/2 = x + 5
6. x +5 - x = 5
Click here to see answer by solver91311(16868)

Question 331791: Evaluate (2/3)^-2
Click here to see answer by checkley77(12569)

Question 331909: can you please explain this? 58-2 [30-(7+5)]
Click here to see answer by mananth(12270)

Question 332304: How do you write an algebra expression? Example: The number of days in 4 weeks
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Question 332458: tia wrote 20+7x to find how much she earned for on pet sitting job and 15x for another job. explain the difference between the expressions
Click here to see answer by mananth(12270)

Question 332504: If 4 less than 3 times a certain number is 2 more than the number, what is the number?
Click here to see answer by AAfter.Com(18)

Question 332638: [(-2x to 5th power y to the 2nd power) 2nd power] 3rd power
Click here to see answer by benazir.sj@gmail.com(109)

Question 332746: please help me solve 4x+3=7 please show the steps
Click here to see answer by vleith(2825)

Question 332747: (x-y)+(2x-3y)=3x-4y please show steps
Click here to see answer by AAfter Search(61)

Question 332793: 3x+4= 5x-6 please help solve
Click here to see answer by Jstrasner(106)

Question 332873: multiply

I am not sure how to go about doing this problem, what is it that I would multiply?
thanks for your help
Click here to see answer by solver91311(16868)

Question 332893: Divide
divide

I do not know what i need to do coud someone please help me
thank you in advance
Click here to see answer by solver91311(16868)

Question 332895: solve by factoring and using the principle of zero products

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Question 332894: Factor completely. if the polynomial is prime, state this

Click here to see answer by nerdybill(6951)

Question 332912: factor completely.if polynomial is prime state it.

Click here to see answer by solver91311(16868)

Question 333014: Find three ordered pairs that satisfy the equation.
y = -3x + 5
Click here to see answer by vleith(2825)

Question 333013: Find three ordered pairs that satisfy the equation.
y = 2x - 1

Click here to see answer by AAfter.Com(18)

Question 333012: Find three ordered pairs that satisfy the equation.
y = x + 7

Click here to see answer by AAfter.Com(18)

Question 333010: The first step in solving x + 10 = 4 is to subtract 4 from both sides.
Click here to see answer by Alan3354(30983)

Question 333047: (2c + 3d)(7c - 2d)
How is this solved? I am a returning college student x20 years since I last went to college and I have forgot everything to do with math. I know this is probably so simple - I just need to remember the steps. could you refresh me on this one?
Click here to see answer by nerdybill(6951)

Question 333036: 10t^3+10
FIRST YOU WOULD FIND OUT WHAT THESE TWO NUMBERS HAVE IN COMMON
THEY BOTH HAVE 10 IN COMMON
SO THE ANSWER WOULD BE
10(T^3+1)
YOU CAN CHECK YOUR ANSWER BY USING THE DISTRIBUTIVE PROPERTY
10*T^3=10T^3
10*1=10
10T^3+10
Click here to see answer by apachemexican1(64)

Question 333203: I really need help with this please. I am returning to school after many years and I don't know where to start with this problem. If you could please show me how to do this type of problem it would be a big help. Thank you.
Simplify: 4a-{6b-2[2a-(3-b)]}

I know the basic PEMDAS rules but the brackets and 3-b are confusing me.
Click here to see answer by rfer(12647)

Question 333205: r(s), for r = 109 and s = 33
Click here to see answer by checkley77(12569)

Question 333246: 17) Half the sum of m and 5
Click here to see answer by solver91311(16868)

Question 333845: Find the value of 2^-3-2^0
Click here to see answer by jim_thompson5910(28504)

Question 333841: Solve: 3> 4+u/-5
Click here to see answer by rfer(12647)

Question 333843: Simplify completely: x^2+5x+4/x+1

Click here to see answer by jim_thompson5910(28504)

Question 333933: 2*3^3+4
insert grouping symbols in the expression to produce the indicated value (62,220,4374)
we have found two of the three
2(3^3+4) = 62
(2*3)^3+4 = 220
we need to find out the equation for answer = 4374
Click here to see answer by scott8148(6628)

Question 334327: The question is, "insert grouping symbols to make each statement true".
the problem is 12-2(squqared)(divided by 5=20
Click here to see answer by rfer(12647)

Question 334367: if you had 2[4(9-7)+1] what would be the answer
Click here to see answer by tinbar(128)

Question 334434: -1/3[-9+10(3)] I do not know the value of this expression?
Click here to see answer by stanbon(57246)

Question 334434: -1/3[-9+10(3)] I do not know the value of this expression?
Click here to see answer by mananth(12270)

Question 334439: Change the given forms into the missing form:
Fraction Decimal Percent
3/4 0.75 ? %

Click here to see answer by jim_thompson5910(28504)

Question 334608: twice the sum of k and 4
Click here to see answer by nyc_function(2733)

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