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

Tutors Answer Your Questions about expressions (FREE)

Question 1016187: solve the equation 4x^2-12x=7 algebraically for x
Click here to see answer by fractalier(6550)

Question 1016187: solve the equation 4x^2-12x=7 algebraically for x
Click here to see answer by ikleyn(52831)

Question 1016456: seven times the difference between 300 and 28

Click here to see answer by macston(5194)

Question 1016732: Expand and simplify:
(x+y-z) (x-y+z)
Could you please have a step by step solution? It's really hard to me, thanks!
Click here to see answer by Theo(13342)

Question 1017702: Evaluate: negative x to the negative second power plus negative x to the second power multiplied by (x-m) if -10-3x=2x and m+3=6
Click here to see answer by Boreal(15235)

Question 1018142: the base of a 19-ft ladder is 6 feet away from the wall. How far above the floor is the top of the ladder? give your answer to the nearest thousandth.
Thank you for any help in solving this problem
Daniel H. Jack
Click here to see answer by Boreal(15235)

Question 1018166: Here's my question:
(x-y)/x + (x^3+y^3)/(xy^2) - (x^2+y^2)/x^2
Thanks! Please have a clear step by step explanation :D
Click here to see answer by Alan3354(69443)

Question 1018167: If the length of a rectangle is 32 kilometers and the width is (x-2) kilometers what is the area of the rectangle?
Click here to see answer by Alan3354(69443)

Question 1018181: simplify: (x-y)/x + (x^3+y^3)/(xy^2) - (x^2+y^2)/x^2
step by step solution, thanks
Click here to see answer by josgarithmetic(39623)

Question 1018733: Solve for A given sqr27 + sqr3 = sqrA

Click here to see answer by KMST(5328)

Question 1018731: Given points B(3,-6) C(-5,2) and M is the midpoint of BC, find M.
Why is it not -1,-2?
Click here to see answer by Edwin McCravy(20060)

Question 1018732: (a^2-36)/(x^2-y^2)
divided by
(a+6)/(y-x)
Click here to see answer by Edwin McCravy(20060)

Question 1018734: In April, Bob changed 1140 Indian Rupees into German Marks when the rate of exchange was x Rupees = 1 Mark. In August, he again changed 1140 Rupees into Marks. The rate of exchange was then (x+1) Rupees = 1 Mark. He received 3 Marks less in April than he did in August. Solve the equation: x^2 + x - 380 = 0 to find the rate of exchange in April.
How? I understand the equation and everything else, but I am just stuck on the last bit of the question. How do you do this?
Click here to see answer by josmiceli(19441)

Question 1019410: What must be added to the below expression to obtain a perfect square?
b^2 - 10kb.
Answer: b^2 - 10kb + = ( )^2
And we have to fill in the blanks. Why are there two pronumerals in the second term?? I understand if there was only one.
Click here to see answer by robertb(5830)

Question 1019492: Simplify:
(a^2-36)/(x^2-y^2)
divided by
(a+6)/(y-x)
Please have a clear step-by-step explanation!
Click here to see answer by josgarithmetic(39623)

Question 1019652: Please help me solve the following expression with steps.thank you
5/8-5/12(3-1/4)+2/3
Click here to see answer by stanbon(75887)

Question 1019652: Please help me solve the following expression with steps.thank you
5/8-5/12(3-1/4)+2/3
Click here to see answer by Theo(13342)

Question 1019963: Please help me answer this expression: 2(3x^2-x-1)-(x^2-2x+5)
Click here to see answer by robertb(5830)

Question 1019989: 4/x + 3/2x
Click here to see answer by solver91311(24713)

Question 1019988: 4x + 3/2x
Click here to see answer by ikleyn(52831)

Question 1020090: Please help me simplify this expression: what is the product of (x^2-1)/(x+1) and (x+3)/(3x-3) (they are in fraction form)
Click here to see answer by ewatrrr(24785)

Question 1020393: f(x)=6x+7,g(x)=x+6
Click here to see answer by ikleyn(52831)

Question 1020455:
Click here to see answer by ikleyn(52831)

Question 1020719: 30 - 10 X 4 = 40
Place parentheses to make this true.
I see no correct solution.
Click here to see answer by rfer(16322)

Question 1020660: What is the numerical expression 5/8-5/12(3-1/4)+2/3 equal to?
Please show work
Click here to see answer by rfer(16322)

Question 1020925: Solve for x: /x-4/=/2x+1/
Click here to see answer by robertb(5830)

Question 1020949: Evaluate 1-(3/16)-(5/6)

Click here to see answer by rfer(16322)

Question 1021028: Hi sorry I missed the 18 in my email well here is the question again. where do I put the parentheses in 3+6x5+4/2-7 to make it 38?
Click here to see answer by ankor@dixie-net.com(22740)

Question 1022031: Express x in terms of y given:
(y/x-3) = 3/x-y
so x = ?
Thanks
Click here to see answer by rothauserc(4718)

Question 1022165: 16-10-(-14)=?

Click here to see answer by Herdaysoji(25)

Question 1022305: X-3=5
Click here to see answer by Alan3354(69443)

Question 1022312: How do you find the percent of a whole number?
Click here to see answer by MathLover1(20850)

Question 1022873: Simplify, Your answer should contain only positive exponents. 
(n^3)^3 *2n^-1
Click here to see answer by josgarithmetic(39623)

Question 1023296: 2 less than the product of two and a number.
Click here to see answer by rfer(16322)

Question 1023530: There are 20 mg of cholesterol in 8 ounces of yogurt. How many mg of cholesterol are there in 5 ounces of yogurt?

Click here to see answer by jim_thompson5910(35256)

Question 1023544: How many books 1 3/4 inches wide can fit on a 98-inch shelf?
thanks for help

Click here to see answer by ikleyn(52831)

Question 1023546: Ann babysat for 6 hours and was paid $30. What is her pay per hour?

Click here to see answer by ikleyn(52831)

Question 1023550: A wheelchair ramp rises 3 feet for every 18 feet it runs. What is the ratio of rise to run?

Click here to see answer by Alan3354(69443)

Question 1023550: A wheelchair ramp rises 3 feet for every 18 feet it runs. What is the ratio of rise to run?

Click here to see answer by addingup(3677)

Question 1023551: Translate the following into an equation, and then solve the equation.
Five times a number decreased by three is 17. Determine the number.

Click here to see answer by addingup(3677)

Question 1023552: Translate the following into an equation, and then solve the equation:
One half of a number is 16. Determine the number.

Click here to see answer by rfer(16322)

Question 1023553: A college has a ratio of 4 male students for every 10 female students. If there are 10,000 male students, how many female students attend this college?

Click here to see answer by ikleyn(52831)

Question 1023549: What interest rate is needed in order to double an initial investment of $2000 for two years?

Click here to see answer by Theo(13342)

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