Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 112352: I need help solving this system by substitution and elimination.
-16x+45y=134
40x+18y=-45

Click here to see answer by jim_thompson5910(28598)

Question 112434: I am trying to solve for x in the following equation but cant seem to get it right. please see below what i have so far. Can you please tell me where I went wrong. Thank you so much!!!!
4x^2-4x-3=0
4x^2-4x+3-3=0+3
4x^2-4x=3
(4x+2)(4x-2)-4x=3
-4x=3
-4x/-4=3/-4
x=.75
Click here to see answer by Fombitz(13828)

Question 112544: Find the value of M. M -:-26=3 1/4. I tried multiplying 3 1/4 by 26 but i couldent find a way how.
Click here to see answer by ilana(307)

Question 112596: Hello, I have been working on this problem all day and it seems the more I work on it the more confusing I seem to make it for myself. I over think too much if that is even possible Here is the problem: There are 850 Douglas fir and ponderosa pine trees in a section of forest bought by Sawz Logging Co. The company paid an average of $300 for each Douglas fir and $225 for each ponderosa pine. If the company paid $217,500 for the trees, how many of each kind did the company buy?
I would really appreciate your help here I'm sure its so simple but I'm just not getting it.
Thank You, Barbara Neely
Click here to see answer by checkley71(8403)

Question 112632: A baseball team wins 11 of its 25 games with no ties. Write the ratio of wins to losses.
Help would this be 11/25? Or is there more to the answer?
Click here to see answer by bucky(2189)

Question 112618: Complete the statement, using a metric unit of length.
The radius of a quarter is 12 ________.
Would the answer be mm or cm? Help please I have never used the metric system at all, it is not used where I live.
Click here to see answer by scott8148(6628)

Question 112616: Identify the hypotenuse of the triangle by giving its letter.
Can someone explain to me in plain english what exactly the hypotenuse is and do I no what side of the triangle it is?
Also I want to thank Jim Thompson for all your help with earlier questions of mine!!
Click here to see answer by scott8148(6628)

Question 112634: A restaurant has 7 booths and 20 tables. Write the ratio of booths to tables as a fraction.
Help me with this problem please?
Click here to see answer by bucky(2189)

Question 112629: Write the proportion 5 is to 8 as 15 is to 24.

Would the answer to this be 5/8 = 15/24 ? Help please.

Click here to see answer by bucky(2189)

Question 112626: Solve for the unknown: 8/52 = m/39
Can someone help me with this fraction problem?
Click here to see answer by edjones(7569)

Question 112621: What is 30% of 200?
Help me to figure this out? Do I put this into a fraction?
Click here to see answer by edjones(7569)

Question 112717: -6(8-13y)

Click here to see answer by MathLover1(6638)

Question 112739: Hello, I am hoping with some help on thisequation and what I have so far.
Here it is: 2(x-3)-3(x+5)=3(x-2)-7
what I have come up with so far is this: (2x-2*3)-(3x+3*5)=(3*-3*2)-7 with the next step being this: (2x-6)-(3x+15)=(3x-6)-7
Anyways I end up with the final answer being X=-2 for this equation am I right on this one? Your input would be greatly appreciated.
Thank You, Barb Neely
Click here to see answer by mathnard(10)

Question 112783: Solve.
a(a+5)(a-5)
Click here to see answer by checkley71(8403)

Question 112889: Write an equation of the line that is paraellel to the equation y=3x+21 that passes through the points (-3,-7)
Click here to see answer by josmiceli(9697)

Question 112940: solve-
3x-1
---- + 2 = 6
4
Click here to see answer by jim_thompson5910(28598)

Question 112947: -x+8+7x-(-1) if x=-10
Click here to see answer by jim_thompson5910(28598)

Question 112949: 2/5 = x-2/20 solve equation for x
Click here to see answer by jim_thompson5910(28598)

Question 112963: write the equation of a line through (-p, q) that is parallel to the line 3x-4y= 5
Click here to see answer by jim_thompson5910(28598)

Question 112988: 1. 3/4x-(x-5)/3=x/2
2. t-12/5+3t/4=(t-6)/2
solve for X
3. x+a/3=c
4. ax+b=cx
5. 3ax-b=d-4cx
Click here to see answer by veronica0626(5)

Question 112965: Two pipes can be used to fill a pool. Working together the two pipes can fill the pool in 4 hours. The larger pipe can fill the pool in 4 hours less time than the smaller pipe can alone. Find the time to the nearest tenth of an hour it takes for the smaller pipe working alone to fill the pool.
Click here to see answer by ankor@dixie-net.com(15660)

Question 113013: Two angles are supplementary, and one is 5° more than six times the other. Find the larger angle.
Click here to see answer by SHUgrad05(58)

Question 112994: A number which when added to 1/4 of it self 20.What is the number
Click here to see answer by SHUgrad05(58)

Question 112945: use the formula I=prt to find the principal.
If the interest (I) earned on $60 for 1 year(t) on a 12% (r) investment.
Click here to see answer by SHUgrad05(58)

Question 112986: convert to slope intercept form:
-5/8x - 3/7y= 2/3
Click here to see answer by SHUgrad05(58)

Question 113167: write an equation for a line with a slope of 2/5 and y-intercept of 2
Click here to see answer by stanbon(57387)

Question 113188: Solve the equation
46. 3/4w = -1/2
Any help with this equation would be Greatly appreciated.
Click here to see answer by stanbon(57387)

Question 113191: Solve the equation
48. On a train, it took 3/4 hour to travel a distance of 52 1/2 miles. What was the average speed of the train?
Any help with this equation would be Greatly appreciated.
Click here to see answer by stanbon(57387)

Question 113195: Solve the equation by first clearing the fractions or decimals.
49.1/2t + 5/12 =5/6
Any help with this equation would be Greatly appreciated.
Click here to see answer by stanbon(57387)

Question 113196: Solve the equation by first clearing the fractions or decimals.
50. -7/10 = 3/4a - 13/20
Any help with this equation would be Greatly appreciated.
Click here to see answer by jim_thompson5910(28598)

Question 113187: 12x-6=11x
Click here to see answer by jim_thompson5910(28598)

Question 113183: Solve the equation
44. 4/9x = 6
Any help with this equation would be Greatly apreciated.
Click here to see answer by jim_thompson5910(28598)

Question 113201: The following scores were recorded on a 200-point final examination:
193, 185, 163, 186, 192, 135, 158, 174, 188, 172, 168, 183, 195, 165, 183. Find the mean final examination score.
HELP
Click here to see answer by jim_thompson5910(28598)

Question 113202: The following scores were recorded on a 200-point final examination:
193, 185, 163, 186, 192, 135, 158, 174, 188, 172, 168, 183, 195, 165, 183.
Find the median final examination score.
Please help me. I do not understand the mode, median thing.
Click here to see answer by jim_thompson5910(28598)

Question 113216: S=21.98square root of 625+153.8
i got this far.. but im stuck on what to do on the next step.. will you be able to help me please...
Click here to see answer by bucky(2189)

Question 113213: At 9:00am a truck leaves the truck yard and travels west at a rate of 45mi/hr. Two hours later, a second truck leaves along the same route, travelling at 75 mi/hr. When will the second truck catch up to the first?
What I have so far is this 45(x)=75(x+2). Would this be correct so far?
Thank you for your help,
Barb Neely
Click here to see answer by bucky(2189)

Question 113199: A salesperson drove 238, 159, 87, 163, and 198 miles (mi) on a 5-day
trip. What was the mean number of miles driven per day?
Help!!! I add these all together then divide by the numbers added? (5)
Click here to see answer by SHUgrad05(58)

Question 113263: Simplify the complex equation.
4+ 2/x
over
x/4 + 1/8
Click here to see answer by MathLover1(6638)

Question 113265: Solve the equation.
x/3 - x/9 = 8
Click here to see answer by lexee25(1)

Question 113337: Solve the equation by first clearing the fraction or decimals.
51. 3.4n = 6.2 = -7.4
Any help with this equation would be Greatly Aprreciated.
Click here to see answer by checkley71(8403)

Question 113334: Solve the equation by first clearing the fraction or decimals.

52. 11.6b - 5 = 9.5
Any help with this equation would be Greatly Aprreciated.
Click here to see answer by checkley71(8403)

Question 113338: Solve the equation by first clearing the fraction or decimals.

43. -3/7c = -6
Any help with this equation would be Greatly Appreciated.
Click here to see answer by checkley71(8403)

Question 113333: If x=3 and x=5, then form a quadratic equation
Click here to see answer by checkley71(8403)

Question 113333: If x=3 and x=5, then form a quadratic equation
Click here to see answer by Fombitz(13828)

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