Wednesday

April 16, 2014

April 16, 2014

Number of results: 191

**Algrebra**

How do I simplify this: -3(4y)
*Monday, October 1, 2007 at 6:36pm by Mackenzie*

**Algrebra**

multiply 4 by -3 and you will get -12y.
*Monday, October 1, 2007 at 6:36pm by Amanda*

**algrebra**

show that b is inverse of a a=[-1 1 -3] [2 1 -1] [2 -1 4] b= [0 1 2] [-1 1 -2 ] [-1 0 1] i got ab = to [1 0 0 ] [0 1 0] [0 0 1] and for ba i got [1 0 -4] [0 1 8] [0 0 5] so there is not a inverse is this right
*Sunday, April 27, 2008 at 8:30am by sandy*

**algrebra**

I don't understand how you are multiplying your matrices, but I found the inverse of matrix "a" to be -3 1 -2 10 -2 7 4 -1 3 and I got ab to be equal to ba
*Sunday, April 27, 2008 at 8:30am by Reiny*

**Algrebra**

Please faCtor. Thank you for your help. a^2 + 4a + 21
*Tuesday, December 30, 2008 at 7:35pm by Luke*

**Algrebra**

typo I think, not negative 21?
*Tuesday, December 30, 2008 at 7:35pm by Damon*

**Algrebra**

NO it's postive 21
*Tuesday, December 30, 2008 at 7:35pm by Luke*

**Algrebra**

Sorry, all you can do is use complex roots then. Look for the roots of a^2 + 4 a + 21 = 0 a = [-4 +/- sqrt (16-84)]/2 a = [-4 +/- sqrt (-68) ]/2 a = [-2 +/- 2 i sqrt_17 ] / 2 a = -1 + i sqrt 17 or a = -1 + i sqrt 17 so (a + 1 + i sqrt 17)(a + 1 - i sqrt 17)
*Tuesday, December 30, 2008 at 7:35pm by Damon*

**Algrebra**

Would the answer be no souliton?
*Tuesday, December 30, 2008 at 7:35pm by Luke*

**Algrebra**

There is no real number solution.
*Tuesday, December 30, 2008 at 7:35pm by Damon*

**Algrebra**

Thank you for your help.
*Tuesday, December 30, 2008 at 7:35pm by Luke*

**Algrebra**

I would appreciate your help with this. Thank you Solve each equation and check for extraneous solutions. [SQRT(x - 3)] - 7=0 2[SQRT(w + 4)]=5 [SQRT(x)]=-2
*Wednesday, December 31, 2008 at 10:12pm by Sal*

**Algrebra**

SQRT(x - 3) - 7 = 0 Change it to SQRT(x - 3) = 7 and then square both sides, to get x - 3 = 49 x = 52 x must be >3 and sqrt (x-3) must be positive (since is equals 7), so there are no other solutions. Square both sides of the second equation and proceed similarly
*Wednesday, December 31, 2008 at 10:12pm by drwls*

**Algrebra**

What would i do with the 2 ?
*Wednesday, December 31, 2008 at 10:12pm by Sal*

**Algrebra**

Square it, or first divide both sides of the equation by 2 and then square 5/2 on the right side.
*Wednesday, December 31, 2008 at 10:12pm by drwls*

**Algrebra**

How do i factor this? t2-16t+64
*Thursday, January 22, 2009 at 7:03pm by Thomas*

**Algrebra**

What is the square root of 64?
*Thursday, January 22, 2009 at 7:03pm by Damon*

**algrebra**

If the subway travels and average speed of 45mph and it allows you to get to work at 8:30, when you leave your house at 7:45. One day the subway was having problems and could go 35mph. how early would you have to leave your house to make it to work on time?
*Thursday, January 29, 2009 at 9:18pm by Anonymous*

**algrebra**

at the regular speed it took 45 min or 3/4 hour so the distance is 45*3/4 mi or 135/4 miles at a speed of 35 mph it would take 135/4 ÷ 35 hours or .96429 hours which would be 57.9 minutes so just back up that time from his work start of 8:30 BTW, how would he have known that ...
*Thursday, January 29, 2009 at 9:18pm by Reiny*

**algrebra**

why did gyo go into a bakery? also what happened when two fruit companies merged?
*Tuesday, March 17, 2009 at 5:56pm by Anonymous*

**algrebra**

3y-7+y=25+5y=20-3y
*Wednesday, September 2, 2009 at 1:30pm by barbara*

**algrebra**

your problem statement makes no sense to me, with two equal signs.
*Wednesday, September 2, 2009 at 1:30pm by bobpursley*

**algrebra**

8x+11x=114
*Thursday, September 3, 2009 at 7:36pm by barbara*

**algrebra**

6-9(g+3)+6g
*Monday, September 14, 2009 at 11:28pm by jess*

**algrebra**

6-9g-27+6g -3g-21
*Monday, September 14, 2009 at 11:28pm by lina*

**algrebra**

And you want to do what?
*Monday, September 14, 2009 at 11:28pm by DrBob222*

**Algrebra**

How do you represent each answer as an algebraic expression using the variable mentioned? Represent the cost of "t" feet of lumber that sells for "g" cents a foot....
*Monday, September 28, 2009 at 10:11pm by Austin*

**Algrebra**

How do you represent each answer as an algebraic expression using the variable mentioned? A utility company measures gas consumption by the hundred cubic feet, CCF. The company has a three-step rate schedule for gas customers. First, there is a minimum charge of $5.00 per ...
*Monday, September 28, 2009 at 10:12pm by Austin*

**Algrebra**

Let's summarize the question: 0 < g ≤ 3 : cost = 5 when g=3 : cost = 5 3 < g ≤ 9 : cost = 5 + 0.75*(g-3) when g=9 : cost = 5 + 0.75*6 = 9.60 9 < g : cost = 9.60 + 0.55*(g-9) Simplify the last expression: For g≥9 CCF: cost = 9.60 + 0.55(g-9) =4.55 + 0.55g
*Monday, September 28, 2009 at 10:12pm by MathMate*

**algrebra**

2 similar triangles were drawn in a design.one was 1/4 the size of the other.if the measures of the first were 5,6 and 12 the measure of a larger triangle were is A)10,14 and 24 B)20,28 and 48 c)10,28 and 48 d)14,28 and 48
*Tuesday, November 17, 2009 at 8:06pm by yeral*

**algrebra**

It is a real lousy question. What it means is in area, one is 1/4 the size of the other. Since triangle area is proportional to base*height, each of those must be 1/2 the larger (remember 1/2*1/2=1/4) so the sides would be 10,12, and 24
*Tuesday, November 17, 2009 at 8:06pm by bobpursley*

**algrebra**

10-3y-7y<30 the solution set is {y/y>= } i dunno how to do this?
*Sunday, December 6, 2009 at 3:59pm by help*

**algrebra**

Find the slope, m = (y2-y1)/(x2-x1). Then use the equation y - y1 = m(x - x1) with either point to find the equation of the line.
*Sunday, December 20, 2009 at 2:40pm by Marth*

**algrebra**

so what is y= then?
*Sunday, December 20, 2009 at 2:40pm by algebra*

**algrebra**

(2,4) and (6,6) what is the equation of the line y=
*Sunday, December 20, 2009 at 2:40pm by algebra*

**algrebra**

it also says im supposed tp find an equation of the line containing the given pair of points?
*Sunday, December 20, 2009 at 2:40pm by algebra*

**algrebra**

Marth actually told you a way to do it slope = m = (6-4)/(6-2) = 2/4 = 1/2 so y - y1 = m(x - x1) y - 4 = (1/2)(x-2) 2y - 8 = x - 2 2y = x + 6
*Sunday, December 20, 2009 at 2:40pm by Damon*

**algrebra**

P=S1 + S2 +S3 for S2
*Thursday, January 28, 2010 at 5:29pm by bethany*

**ALGREBRA**

THE FASTEST MOVING INSECT IS THE LARGE TROPICAL COCHROACH. IT SCURRIES AT SPEEDS OF UP TO 2.3 FEET PER SECOND. NOW WRITE AN EQUATION THAT REPRESENTS HOW MANY MILES A ROACH CAN TRAVEL IN 1.5 HOURS
*Wednesday, February 3, 2010 at 12:53pm by MARY*

**ALGREBRA**

2.3 feet/sec = 8280 ft/hour , there are 3600 seconds in 1 hour = 1.568 mi/hr , there are 5280 feet in 1 mile so in 1.5 hrs, it went 1.568 x 1.5 or 2.35 miles
*Wednesday, February 3, 2010 at 12:53pm by Reiny*

**algrebra**

a drop from 100 to 50 is 50. a rise 50 to 100. will the percent of decrease and the percent of increase be the same.
*Sunday, December 20, 2009 at 2:40pm by lisa*

**Algrebra**

Write the equation of the line passing through the given point with the given slope. a) point (3,-2) with slope of m=5/3 Answer: y-(-2)=5/3x-3 b) point (3,9) with slope m=(-2/7) Answer: y-9=-2/7x-3 Correct?
*Sunday, March 7, 2010 at 2:33pm by Marco*

**Algrebra**

not quite y-(-2)=(5/3)(x-3) 3(y+2) = 5(x-3) 3y + 6 = 5x - 15 re-arranging ... 5x - 3y = 21 You have the same error in the second one, watch your brackets.
*Sunday, March 7, 2010 at 2:33pm by Reiny*

**Algrebra**

I see it thanks...
*Sunday, March 7, 2010 at 2:33pm by Marco*

**algrebra**

The function W(d)=0.112d approximates the amount in centimeters of water that results from d cm of snow melting. Find the amount of water that results from snow melting from depths of 20cm,38com, and 62cm.
*Friday, March 19, 2010 at 11:49am by PENNY*

**algrebra**

Just take 20, 38, and 62 times 0.112.
*Friday, March 19, 2010 at 11:49am by foxycleo *

**algrebra**

Solve by applying the quadratic Formula: all radicals should be simplified as far as possible. Show your work. a^2 -12a + 35 =0
*Sunday, April 25, 2010 at 3:01pm by dan*

**algrebra**

a^2 -12a + 35 =(a - 7)(a - 5) a - 7 = 0 a - 5 = 0 Can you find the values for a?
*Sunday, April 25, 2010 at 3:01pm by PsyDAG*

**algrebra**

how to solve -6x-4y+3x-y
*Monday, August 16, 2010 at 10:54pm by Rebecca*

**algrebra**

Your subject is algebra. Please spell it correctly. You combine like terms, the x's with the x's and y's with y's. -6x+3x=-3x and -4y-y=-5y so your answer is -3x-5y
*Monday, August 16, 2010 at 10:54pm by Jen*

**algrebra**

can someone show the steps 6*1/2-4[2-3(4*1/2-3)]=-17 in two step equation in algrebra
*Saturday, October 9, 2010 at 3:13pm by jethro*

**algrebra**

6*1/2-4[2-3(4*1/2-3)] = 6*1/2-4[2-3(2-3)] = 6*1/2-4[2-3(-1)] = 6*1/2-4[2+3] = 6*1/2-4[5] = 3 - 20 = -17 of course you could plug 6*1/2-4(2-3(4*1/2-3)) into the Google search window to get http://www.google.com/search?rls=ig&hl=en&source=hp&biw=1662&bih=912&q=6*1%2F2-4%282-3%...
*Saturday, October 9, 2010 at 3:13pm by Reiny*

**algrebra**

9 a . 12x -4x =104 9b 8a+3a+4a=12 9c. 7m -3m-6 = 30 9d. 2\3y + 5\3y-8=6
*Tuesday, January 4, 2011 at 12:02am by kattie*

**algrebra**

9a. 12X - 4X = 104. 8X = 104, X = 104 / 8 = 13. 9d. 2Y/3 + 5Y/3 - 8 = 6. 7Y/3 = 14, Multiply both sides by 3: 7Y = 42, Y = 42 / 7 = 6. The remaining problems are similar to 9a, and 9d.
*Tuesday, January 4, 2011 at 12:02am by Henry*

**Algrebra**

3u-ux/x=6y/x
*Thursday, January 6, 2011 at 8:48pm by Maria*

**algrebra**

Suppose the speedometer in your car reads 55.0 mph. What is your speed in m/sec? (1km=0.621 mi)?
*Wednesday, January 19, 2011 at 5:34pm by susan*

**algrebra**

1 km = 1000m one hour = 3600 sec 55 * .621 * 1000 * 3600 = ?
*Wednesday, January 19, 2011 at 5:34pm by PsyDAG*

**algrebra**

Just for the smell of it They made a perfect pear
*Tuesday, March 17, 2009 at 5:56pm by Skier*

**Algrebra**

How do you write the rule for: y=3x+4 for x=8
*Monday, February 21, 2011 at 10:33pm by Amanda*

**Algrebra**

y=3x+4 for x=8 Put 8 in place of x in the expression to get y(8)=3(8)+4 = 24+4 = 28 But do make the distinct that y=3x+4 is a rule, while y(8)=28 is a particular value of the rule.
*Monday, February 21, 2011 at 10:33pm by MathMate*

**Algrebra**

The points (1,5), (4,5), and (1,0) represent three corners of a rectangle; find the coordinates of the fourth poin
*Sunday, February 27, 2011 at 12:37pm by Anonymous*

**Algrebra**

simplify 12n to first power/36n
*Thursday, March 10, 2011 at 8:09pm by michael*

**Algrebra**

What goes into 12 that goes into 36? 4 goes into 12 3 times and into 36 9 times. This can be simplified again by 3s. 3 goes into itself 1 time and into 9 3 times. So, your final answer would be 1/3rd.
*Thursday, March 10, 2011 at 8:09pm by Julia*

**Algrebra**

How do you insert grouping symbols to make this equation true? 14 divided by (5+2) +8=10 14/7=2+8=10 Please confirm, I really have an issue with Algebra
*Sunday, March 20, 2011 at 12:52pm by Jeannie*

**Algrebra**

14/(5+2) + 8 = 10 14/7 + 8 = 10 2 + 8 = 10 Confirmed!
*Sunday, March 20, 2011 at 12:52pm by PsyDAG*

**Algrebra**

Please advise if I did this problem correctly Solve the proportion 32/X = 2/3. 32/X = 2/3 32 divided by 2 = 16 11 x 3 = 33 16/33 16 x 2 = 32 33 x 1 = 33
*Thursday, March 31, 2011 at 8:05pm by Jeannie*

**Algrebra**

Please confirm if I did the follow problems correctly: A) Find the sum or difference. (5a â€“ 3b) + (2a + 6b)= 7a + 9b Answer: = 7a + 9b B) Letâ€™s work a few of these (FOIL) 1) (x+2) (x+8) = x 10 Answer: x10 2.) (x+5) (x-7) = x + 11 Answer: x + 11 3.) (2x+4) (2x-3) = 4x + 7 ...
*Sunday, April 3, 2011 at 6:55pm by Jeannie*

**Algrebra**

Please advise on the following: From 1993 to 2003 the cumulative number N of AIDS cases in thousands can be approximated by, where corresponds to the year 1993. N = -2 x2 + 76x + 430, where x = 0 corresponds to. 1) Show how well the equation approximates the data. 2) Rewrite ...
*Monday, July 25, 2011 at 10:27am by Raj*

**Algrebra**

2. N = -2x^2 + 76x + 430. A*C = -2*430 = -860 = -10*86, -2x^2 + 86x-10x + 430, Group the 4 terms into 2 factorable pairs: (-2x^2+86x) + (-10x+430), -2x(x-43) + -10(x-43) = 0, N = (x-43)(-2x-10).
*Monday, July 25, 2011 at 10:27am by Henry*

**algrebra**

how do i solve 3x+9-8x+6=62/3
*Tuesday, August 23, 2011 at 12:15am by rere*

**algrebra**

3x + 9 - 8x + 6 = 62/3 Multipy both sides with 3 9x + 27 - 24x + 18 = 62 9x - 24x = 62 - 27 - 18 -15x = 17 Divide both sides with -15 x= -17/15
*Tuesday, August 23, 2011 at 12:15am by Bosnian*

**algrebra**

(6x^2-xy+y^2)+(-x^2-9xy+6y^2)
*Wednesday, January 11, 2012 at 11:12pm by Anonymous*

**algrebra**

just collect like powers 6x^2 - x^2 - xy - 9xy + y^2 + 6y^2 5x^2 - 10xy + 7y^2
*Wednesday, January 11, 2012 at 11:12pm by Steve*

**Algrebra**

find the value of r so the line that passesthough each pair of points has the given slope(9,r),(6,3),m=-1/3
*Thursday, January 19, 2012 at 9:45pm by Linda*

**Algrebra**

(r-3)/(9-6) = -1/3 3r-9 = -3 3r = 6 r = 2
*Thursday, January 19, 2012 at 9:45pm by Reiny*

**algrebra**

16(5/8x+1/16)x=16(7/16+x) I have no idea how to multiple 5/8 by 16
*Wednesday, February 8, 2012 at 9:30pm by melissa *

**algrebra**

Multiply the numerators together. Then multiply the denominators together. (5/8) * (16/1) = 80/8 = 10
*Wednesday, February 8, 2012 at 9:30pm by Ms. Sue*

**algrebra**

John wants to rent a car. He knows that a friend used XYZ rental agency in the past. His friend paid $65 to drive 50 miles and $74 to drive 80 miles. What is the linear function the agency uses to find the cost?
*Monday, February 27, 2012 at 11:40am by tammi*

**algrebra**

they made a perfect pear is not correct on my paper. The letters of the words don't fit in the slots right; I know this sounds gay but if you want to not get a F on it or the teacher to realize you cheat then you'll just have to do it this time.
*Tuesday, March 17, 2009 at 5:56pm by Anonymous*

**Algrebra**

I need to find the approximate surface area of a cone with the R=5 and L=6. I thought I figured it out by 3.14(5)(6) which will give me 94.2 I then would take 94.2 +3.14(5)squared and I came up with 172.7, but my answer should be either 20m squared, 98m squared, 118m squared ...
*Monday, April 9, 2012 at 2:12pm by Samantha*

**Algrebra**

I think you have written it down wrong. If the diameter of the cone is 5, then R=2.5 and the area is 66.7, or 67.
*Monday, April 9, 2012 at 2:12pm by Steve*

**Algrebra**

substitution method 3x + y=12 8x-2y =4
*Monday, October 29, 2012 at 4:37pm by Dee*

**Algrebra**

so, substitute: y = 12 - 3x 8x - 2(12-3x) = 4 8x - 24 + 6x = 4 14x = 28 x = 2 so, y = 6
*Monday, October 29, 2012 at 4:37pm by Steve*

**Algrebra**

7x+10=59 10-7x+10=59-10 3x+10=49 ??? -3+x=5 3+(-3)+x=5+3 x=8 Is this right Ms.Sue?
*Thursday, May 30, 2013 at 7:04pm by cheyenne*

**Algrebra**

Although I am not Ms.Sue: 7x+10=59 7x does not change to a negative. 7x + 10 - 10 = 59 -10 7x = 49 x = 7
*Thursday, May 30, 2013 at 7:04pm by PsyDAG*

**Algrebra**

with a tailwind, a bird flew at a ground speed of 3 mi/h. Flying the same path against the same wind, the bird travels at a ground speed of 1.5 mi/h. What is the bird's air speed? What is the wind speed?
*Tuesday, January 21, 2014 at 9:59pm by Nathan*

**Algrebra**

bird's air speed ---- x mph wind speed -------- y mph x+y = 3 x-y= 1.5 add them 2x = 4.5 x = 2.25 mph y = 0.75 mph
*Tuesday, January 21, 2014 at 9:59pm by Reiny*

**pre-algrebra**

A restaurant offers a buffet dinner at group prices. The buffet costs the restaurant $6 per person. How large a group can the restaurant serve without losing money? P. S. I came up with a group of ten person that they could serve. Please let me know if this is wrong. Thank-you...
*Sunday, September 3, 2006 at 8:38pm by Bowier4*

**Algrebra I**

1. Which line is the flattest (or is less steep)? Why? y = 5x -6 y = 5x + 6 y = x - 3 y = x + 3 I thought it would be the last one since it has the smallest slope Well, yes...but both the third and last equations have a slope of 1, and so have the same "steepness" (these lines...
*Thursday, October 12, 2006 at 4:30pm by Margie*

**algrebra 2**

it is called completing the square here is the equation 4x^2-4x+1=9 if anyone can help me please do okay i really need ot understand this 4x^2-4x+1=9 Move the numbers to the other side. 4x^2 -4x = 9-1 4x^2 -4x = 8 Now factor out 4 to make things easier. x^2 -x =2 but remember ...
*Thursday, November 2, 2006 at 11:19pm by lisa*

**pre-algrebra**

I just do not understand dimensional analysis. Can anybody explain this question: 32 cm = ?m ---- ---- s min Although your dimension labels to not seem to be lined up correctly, it looks like you are being asked to convert 32 cm/s to ? meters/minute. You can do that by ...
*Tuesday, March 20, 2007 at 11:06am by Janet*

**Algrebra II**

hi, thanks for reading this I have a question for finding vertical and horizontal asymptotes! as to finding the intercepts, domain, and graphing it all together... like y= 6 over (x+3) I don't quite understand the concepts and things, but if you can give me a hand that'll be ...
*Friday, July 13, 2007 at 5:29pm by Kaz18 Tsuruoka*

**Pre-Algrebra**

it's about distributive property simplify the expression 12xy-4xy
*Wednesday, November 15, 2006 at 3:37pm by Selecia*

**Algrebra II**

In this word problem, I have to assume that it can be described by a linear function: A photocopying machine purchased new for $4500 loses $900 in value each year. a) Find the value of the machine after 18 months. b) When will the book value be $1200? Thank you for helping me ...
*Tuesday, November 11, 2008 at 5:04pm by Maria*

**Algrebra II**

Value=4500- 900/12 * timeinMonths
*Tuesday, November 11, 2008 at 5:04pm by bobpursley*

**algrebra 1**

Could you explain in detail how to do the equation (5b4n ) 2 2a6 keep in mind the 4 and 6 are small numbers on the right top corner and the parenthesis are for the numbers on top and bottom. There is a line in between the upper and lower numbers too.
*Tuesday, January 6, 2009 at 9:47pm by Andree*

**algrebra 1**

Is this what you are trying to ask? (5b4n)2/(2a6)
*Tuesday, January 6, 2009 at 9:47pm by DrBob222*

**algrebra 1**

yes
*Tuesday, January 6, 2009 at 9:47pm by Andree*

**algrebra 1**

Yes this is what im asking thanks: Is this what you are trying to ask? (5b4n)2/(2a6)
*Tuesday, January 6, 2009 at 9:47pm by Andree*

**algrebra 1**

OK. Now, what do you want to do with the equation? You don't show that it equals anything.
*Tuesday, January 6, 2009 at 9:47pm by DrBob222*