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

Tutors Answer Your Questions about expressions (FREE)

Question 417563: dont understand this problem and solution teacher put on board could you help me understand? I dont get it.
4y=2x-10
2y=2(5+2y)-10
4y=10+4y-10
4y-4y=10-10
0=0

=
Click here to see answer by stanbon(75887)

Question 417603: please help me to evalutate the expression (3+4)^2 - (2+3^2-1)
Click here to see answer by jim_thompson5910(35256)

Question 417795: Integration question. Evaluate ∫_1^3 (6x^2+4x)dx
The 3 is on top of the integral sign and the 1 is at the bottom
If you can help, thank you
Click here to see answer by robertb(5830)

Question 420570: simplify each expression. show factoring and canceling.
a^5/3 divided by b^2
please help.
Click here to see answer by sudhanshu_kmr(1152)

Question 421127: evaluate 12P8
Click here to see answer by rfadrogane(214)

Question 421612: I need to Multiply and Simplify to lowest terms
(t+8)^2/t+6 * (t+6)^2/t+8
Express in terms of i Square root of -54
Click here to see answer by dnanos(83)

Question 422439: calculate 2.16x10^32 / (6x10^14)(1.5x10^12)
Click here to see answer by rfer(16322)

Question 422681: What is the value of 5 4/9 divided y when y=2 1/3. I dont get what you do with the 5 and the 2.
Click here to see answer by algebrahouse.com(1659)

Question 422749: 1) 4h-4(3h-1)=0
2) 1-(4r-1)=2(t-3)
3) -12=3(2n-3)
Click here to see answer by jim_thompson5910(35256)

Question 423102: what is the largest four-digit number whose cube root is a prime number?
answer: 6859
but I don't understand how you get that answer?
thx!
Click here to see answer by jim_thompson5910(35256)

Question 423276: please show me how to solve this problem, step by step.
f(x) = 3x + 4 find f(-5)
Click here to see answer by unlockmath(1688)

Question 423542: n/4=5
Click here to see answer by rfer(16322)

Question 424485: Good morning,
I need help solving this simplification equation.
Simplify (4x^2 y^3) (5x^-3 y^-2 z^0)
The zero throws off my calculations but i believe the answer may be

20y / x or

Any help is appreciated.
Thank you very much.
20 / x^6 y^6 or
20xz/ y

Click here to see answer by Gersid(33)

Question 424504: hi guys,

i need help with this factoring equation

factor 5y-21x+3xy-35 completely.
i think the answer is (y-7)(3x+5) yet im not really sure
thanks in advance
Click here to see answer by nerdybill(7384)

Question 425068: Please help with this problem 3/ over radical symbol with 5y in it. Thanks
Click here to see answer by Alan3354(69443)

Question 425614: (16/81) to the power of 1/4
Click here to see answer by asuar010(338)

Question 425613: (-64)to the power of -2/3
Click here to see answer by ewatrrr(24785)

Question 425612: evaluate 243 to the power of 4/5

Click here to see answer by ewatrrr(24785)

Question 426460: the difference between 5 and twice a number is one. find the number
Click here to see answer by edjones(8007)

Question 426766: How to factor 5a^2-7ab-6b^2
Click here to see answer by stanbon(75887)

Question 426766: How to factor 5a^2-7ab-6b^2
Click here to see answer by Alan3354(69443)

Question 426766: How to factor 5a^2-7ab-6b^2
Click here to see answer by Adrish(44)

Question 427156: 5-16w-w-11
I tried but I got the wrong answer
Thank you
Click here to see answer by rfer(16322)

Question 427449: x=1/25(22z-9w) solve for z
Click here to see answer by jorel1380(3719)

Question 427618: write down the coefficient of x in each of the following expressions: x+1 and 14-x
Click here to see answer by Alan3354(69443)

Question 429558: simplify each expression.
-7-3x+x-9

Click here to see answer by akch2002(12)

Question 429910: can 2xsquared-12x-80 be completly factored?

Click here to see answer by Gogonati(855)

Question 430280: 2x^2+3xy-4y^2 when x=2 and y = -4
Click here to see answer by algebrahouse.com(1659)

Question 432012: solve for indicated letter b a=3b
Click here to see answer by ewatrrr(24785)

Question 432084: 9) It is possible to estimate how far away a bolt of lightning is by counting the seconds between the flash and the thunder. If we let the variable s represent the number of seconds, then a bolt of lighting is approximately miles away.
a. A lifeguard sees a flash of lightning. After 20 seconds, she hears thunder. About far away was the lightning?
b. A golfer sees a bolt of lightning strike a tree a few holes away. He hears the thunder for about 2.5 seconds later. About how far away from the tree is he standing?

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

Question 432562: write without negative exponents 6 / 5z^-6

Click here to see answer by edjones(8007)

Question 432812: choose a route from San Francisco, CA to Washington, DC that will allow them to reach their destination in a timely manner and at the most economical price.
Click here to see answer by Alan3354(69443)

Question 433062: if (3/4 -2/3) +(1/2 + 1/2+1/3) is calculated and the anser reduced to simplest terms, what is the denominator of ;the resulting fraction
Click here to see answer by ewatrrr(24785)

Question 433387: Simplify each expression.
1.sqrt -81
2.(5-2i)(2+5i)
3.3+5i/2-4i
Click here to see answer by Gogonati(855)

Question 433387: Simplify each expression.
1.sqrt -81
2.(5-2i)(2+5i)
3.3+5i/2-4i
Click here to see answer by robertb(5830)

Question 433604: solve
0.4x+5 < or equal to 0.8x-2
solution si {x/x _ _ }
Click here to see answer by stanbon(75887)

Question 433977: How do you solve -4(6+3x)=-46.
Click here to see answer by stanbon(75887)

Question 434358: Factor each expression completely.
1. -3x^2+21x
2. x^2-16
3. x^2-10x+24
4. x^2-6x

Click here to see answer by MathLover1(20850)

Question 434440: 12;8t=96
Click here to see answer by stanbon(75887)

Question 434812: please tell me if I got this right

13+4b+6b-5
10b-8
Click here to see answer by stanbon(75887)

Question 434876: answer to 2c+9-2
Click here to see answer by stanbon(75887)

Question 435100: v=(b-u)/k solve for u
Click here to see answer by Gogonati(855)

Question 435535: factor completely: 5x+5y+zx+zy
Click here to see answer by shree840(260)

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