Questions on Algebra: Equations answered by real tutors!

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Question 469647: Solve by factoring and using the principle of zero products
x^2+4x-77=0
Click here to see answer by ewatrrr(10682)

Question 469541: I have tried and tried to answer these but my answers do not come out right and I can't even teach my daughter the right way so could you help me out by answering them for me it would help alot.

Simplify. Leave answer in radical form. **the brackets are supposed to be the square root sign, so everything in the brackets are whats under the radical.
a) 3(2[sqrt x^3])^2
b) 3[sqrt a] (4 [sqrt a] + 2[sqrt a^3])

2. Solve for x:
2(x +4)^2 = 98

3. Add and simplify: 2/2x-1 + 1/-2x

4. Write as a ratio of two integers
a) 4 1/2
b) 3.271
c) 59%

5. Graph each inequality: (we're supposed to graph it on a number line...which i dont really get)
a) 2x + 2 <_ 8 + 4x
b) -5 < x - 2 <_ 3
Click here to see answer by lwsshak3(6746)

Question 469872: what is an equation that can solve the proportion 4/x=3/10?
Click here to see answer by ewatrrr(10682)

Question 469876: Solve for x: -2(-13x+8)=3(x+2)
Click here to see answer by ewatrrr(10682)

Question 469895: 3x squared minus 19 plus 40
Click here to see answer by sofiyac(695)

Question 469824: If a^2 - am + bm + b^2 , what is m in terms of a and b?
A) b - a
B) a - b
C) a + b
D) (a^2 + b^2)/(a - b)
E) (a^2 + b^2)/(a + b)

Thanks!
Click here to see answer by sofiyac(695)

Question 469906: Because of a poor grade on the fifth and final test, Chris's test grade fell from 90.5 to 84.0. what did Chris score on the fifth test. Assume all tests are equally important.
Click here to see answer by Edwin McCravy(8999)

Question 469918: A coin is flipped twice. What is the probability that one head and one tail will occur?
Click here to see answer by Edwin McCravy(8999)

Question 470012: solve the system of equations
x + 3y = 32
-3x + 2y = 3
and solve for this system of equations
x + y = 5
x - y = -9
Click here to see answer by sofiyac(695)

Question 469925: 2x+y+6xy-32 what is the answer to this? it's not homework, i'm just curious a friend asked me
Click here to see answer by Alan3354(31487)

Question 470061: please help!! solve using the principle of zero products (5w+3)(2w-6)=0
Click here to see answer by jim_thompson5910(28696)

Question 470061: please help!! solve using the principle of zero products (5w+3)(2w-6)=0
Click here to see answer by Edwin McCravy(8999)

Question 470215: Solve the equation. Be sure to show your work. All final answers must be in simplest form p+2/3=6
Click here to see answer by Tatiana_Stebko(1326)

Question 470217: Solve the equation. If it is an identity (all real numbers) or a contradiction (no solution), so state.
8x + 3 + x = 5x + 3 + 4x
Click here to see answer by josmiceli(9817)

Question 470218: Solve the equation. Be sure to show your work. All final answers must be in simplest form. p+2/3=6
Click here to see answer by Alan3354(31487)

Question 470277: Could someone please help me, Thank You so much.
Is x = 6 a solution to -2x – 4 = -8?

Click here to see answer by nerdybill(7003)

Question 470285: Can someone please help. Thanks
Solve using the multiplication principle.
-4.6b = 16.56

Click here to see answer by Theo(3504)

Question 470276: Please can someone help. Thank You.
Solve the equation. Be sure to show all of your work.
-14a + 3 = 10

Click here to see answer by Alan3354(31487)

Question 470325: i need help solving 8a squared +23a -3
Click here to see answer by Alan3354(31487)

Question 470350: 6.2
1.If a fair quarter is flipped 3 times, what is the probability of getting exactly three heads? Round your answer to the nearest thousandths.
2.For a binomial experiment, how many outcomes are possible for each trial?
b. 3
c. 1
d. 2
3.
What does the random variable (r) for a binomial experiment of n trials represent?
The total number of chances
b. Can not be determined from information given.
c. The number of failures
d. The number of success

Click here to see answer by solver91311(17059)

Question 470365: I need to find 2 equations to the following story problem so I can do the substitution method to solve. How many liters of a 30% alcohol solution must be mixed with 70 liters of a 90% solution to get a 50% solution? Can you show me the steps to figure this out. Thanks.
Click here to see answer by sofiyac(695)

Question 470383: Lucas determined that the total cost C to rent a car for the weekend could be represented by the equation C=0.35m+125, where m is the number of miles that he drives. if the total cost to rent the car was $363, how many miles did he drive?
Click here to see answer by sofiyac(695)

Question 470471: This is a story problem. I must have 2 equations so I can do the substitution method to solve. The problem is: A cruise boat travels 60 miles downstream in 2 hours and returns to its starting point upstream in 6 hours. Find the speed of the stream. If you could show me how to solve this using the 2 equations and the d=r.t Thanks!
Click here to see answer by Theo(3504)

Question 470473: This is a story problem. I must have 2 equations so I can do the substitution method to solve. The problem is: A cruise boat travels 60 miles downstream in 2 hours and returns to its starting point upstream in 6 hours. Find the speed of the stream. If you could show me how to solve this using the 2 equations and the d=r.t formula. Thanks!
Click here to see answer by solver91311(17059)

Question 470619: -57=(X+273)/ 1.109
What is X=??
Click here to see answer by sofiyac(695)

Question 470619: -57=(X+273)/ 1.109
What is X=??
Click here to see answer by Tatiana_Stebko(1326)

Question 470665: how to solve this equation 1/2t+5/12=5/6?
Click here to see answer by sofiyac(695)

Question 470668: How do I simplify this equation by factoring?
Here is the link to the image, as I don't know how to type it out.
http://www.flickr.com/photos/53982956@N07/5940260063/
Click here to see answer by sofiyac(695)

Question 470491: 5+m\7=10
Click here to see answer by sofiyac(695)

Question 470459: I can not figure this out for nothing, and I need to show step by step, I have been working on it for 2hrs I would appreciate any help.
14(.3n.31)=5.18-(.4-4.22n)
Click here to see answer by ankor@dixie-net.com(15745)

Question 470714: "d= r x t" for "r"
Click here to see answer by Alan3354(31487)

Question 8235: 3x-2(x+6)=4x-(x-10)
Click here to see answer by JWG(21)

Question 470876: good day i am having problems with this equation. It says perform the operation and write the result in standard form.
(y^3+7)-[(y^2+7)+(9y-6)]
Some of the answers i have came up with are not right, 9y^6+8, 9y^6+20, I used the foil method like I thought i should have but it still comes up wrong any help would be appreicated. thank you
Click here to see answer by sudhanshu_kmr(1152)

Question 470946: 14 more than 4 times a number is equal to the difference between -98 and 4 times the number
Click here to see answer by lwsshak3(6746)

Question 471035: what is 3% of 240.000
Click here to see answer by algebrahouse.com(1079)

Question 471215: Three times a number increased by 4 equals 31. How do I write that in an equation?
Click here to see answer by Alan3354(31487)

Question 471216: please help me solve this equation:
solve the equation. check your answer.
5 - w/w + 5/2 = -4/w
Click here to see answer by jorel1380(2518)

Question 471222: Eight less then five times a number is 27. How do I write that in an equation?
Click here to see answer by jorel1380(2518)

Question 471234: Twice a number decreased by 16 is 54. How do I write that in an equation?
Click here to see answer by MathLover1(6801)

Question 471264: What's x? 6 − 8x = 18 I get 3 but when I plug it into the equation to check it the answer is -18 not 18.
Click here to see answer by Alan3354(31487)

Question 471342: solve for y when x =2
2y(4-x)=x/2
Click here to see answer by algebrahouse.com(1079)

Question 471275: please can someone help me. Thank You so much.
Solve -6(3x – 1) = 2(3 – 7x) – 4x. Please show all of your work.
Click here to see answer by rfer(12726)

Question 471275: please can someone help me. Thank You so much.
Solve -6(3x – 1) = 2(3 – 7x) – 4x. Please show all of your work.
Click here to see answer by Alan3354(31487)

Question 471401: Solve by elimination method and what is the solution set?
8x-y=20
x+y=7

Click here to see answer by robertb(4012)

Question 471404: Solve by substitution method and what is the solution set?
9x+2y=-23
x=3-3y

Click here to see answer by mananth(12270)

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