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April 20, 2014

April 20, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**Math**

all 6 numbers add up to 55953.77 $2,023.60. $22,046.01 $8,161.59 $10,284.69 $11,023.01 $2,414.88 $55,953.77total The percent listened for 6 numbers above are in order as above are the percents that were calculated (which I don't understand how!) 4.0% 39.0% 15.0 % 18.0% 20....
*Wednesday, April 16, 2014 at 4:02pm*

**MATH**

How do you find the base area of a rectangular prism if you know the volume and the height
*Wednesday, April 16, 2014 at 4:00pm*

**Math**

Bart won the jellybean estimation contest at his class Easter party he won 28 Easter stickers he gave 1/8 of the stickers to his friend rob how many stickers did he give rob
*Wednesday, April 16, 2014 at 3:50pm*

**Math**

to figure a percentage, just divide and multiply by 100. 2023.60/55953.77 = 0.0361 = 3.61%
*Wednesday, April 16, 2014 at 3:46pm*

**calculus help**

There's a nice discussion here: http://math.stackexchange.com/questions/126755/lhospitals-rule-with-indeterminate-powers
*Wednesday, April 16, 2014 at 3:44pm*

**Math **

Can you help me ? I need to figure formula if I have $2023.60 what percent is it of $55,953.77? Also need to figure formula if I have $22,046.02.01 what percent is it of $55,953.77?
*Wednesday, April 16, 2014 at 3:32pm*

**Math**

Using these numbers, 2 4/9, 2 5/9, 2 6/9, 2 8/9, 3, 3 1/9, 3 3/9, 3 4/9 & 3 5/9. Build a square where the sum of every horizontal, vertical, and diagonal row is 9. The square has 3 rows across & 3 rows down for a total of 9 small blocks.
*Wednesday, April 16, 2014 at 3:13pm*

**Math**

Show 2/4 of the set. How many counters?
*Wednesday, April 16, 2014 at 2:21pm*

**consumer math**

Tim Worker buys a new sofa for $629.95. He pays 25% down and takes an installment loan to complete the purchase. He makes 12 payments which include his principal and a $60.00 finance charge. What is the APR on his loan to the nearest tenth? The down payment is $ The amount ...
*Wednesday, April 16, 2014 at 12:27pm*

**College Math**

a. F'(x) = 3(x^2 +4x +2/(x+2)^2 b. F'(x) = 5cos(5x + e^2) c. F'(x) = 6x(e^x) + e^x (6) = 6e^x (x +1)
*Wednesday, April 16, 2014 at 12:17pm*

**College Math**

F'(x) = 3(x^2 +4x +2/(x+2)^2 F'(x) = 5cos(5x + e^2) F'(x) = 6x(e^x) + e^x (6) = 6e^x (x +1)
*Wednesday, April 16, 2014 at 12:16pm*

**College Math**

Find the derivative of the following functions: a) f(x)=(3x^2-6 )/(x+2) b) g(x)=sin(e^2 +5x) c) j(x)=6xe^x d) Your velocity is v(t)= t^2 = 1 for 0≤ t ≤ 4. Find or estimate the distance traveled during this time.
*Wednesday, April 16, 2014 at 11:54am*

**math**

(P2-P1)/P1 * 100
*Wednesday, April 16, 2014 at 10:52am*

**Math**

√(25^2 + 10^2)
*Wednesday, April 16, 2014 at 10:50am*

**Math**

A boat must be moored 25 feet away from a dock. The boat will be 10 feet below the level of the dock at low tide. What is the minimum length of rope needed to go from the boat to the dock at low tide?
*Wednesday, April 16, 2014 at 10:35am*

**Math**

3 L / 2 = 18 Multiply both sides BY 2 3 L = 36 Divide both sides by 3 L = 12 ft
*Wednesday, April 16, 2014 at 10:32am*

**Math**

P = 2 W + 2 L = 2 ( W + L ) = 40 2 ( W + L ) = 40 Divide both sides by 2 W + L = 20 W = 2 + L / 2 W + L = 20 2 + L / 2 + L = 20 2 + L / 2 + 2 L / 2 = 20 2 + 3 L / 2 = 20 Subtract 2 to both sides 2 + 3 L / 2 - 2 = 20 - 2 3 L / 2 = 18 Multiply both sides by 3 3 L = 36 Divide ...
*Wednesday, April 16, 2014 at 10:30am*

**math **

what is the formula to find the percent increase in profit
*Wednesday, April 16, 2014 at 10:18am*

**Math**

The perimeter of rectangular garden is 40 feet. The width is 2 feet more than half the length. What is the length and width
*Wednesday, April 16, 2014 at 10:15am*

**math**

3, answer = 500 4, answer = 10 5, 382. 50
*Wednesday, April 16, 2014 at 10:12am*

**math**

To recover a larger chair in your home,you purchase 9.5 yards of upholstery fabric at $11.00per yard.if there is a 7%sale tax,what is the total cost of the fabric
*Wednesday, April 16, 2014 at 9:05am*

**algebra**

oh my god math is terrible
*Wednesday, April 16, 2014 at 8:36am*

**math**

log4(2x+4) - 3 =log4 3 log4(2x+4) - 3log44 = log4 3 log4(2x+4) - log4 4^3 = log43 log4[(2x+4)/64] = log43 (2x+4)/64 = 3 2x+4 = 192 2x=188 x = 94
*Wednesday, April 16, 2014 at 7:51am*

**math**

log4(2x+4)-3 =log4 3
*Wednesday, April 16, 2014 at 7:37am*

**Math**

PR/QR = sin(Q) PR/120 = sin(10.5)
*Wednesday, April 16, 2014 at 6:07am*

**Math**

I get zero. ∫[-1,2] 1-x^2 dx = x - x^3/3 [-1,2] = (2 - 8/3) - (-1 + 1/3) = 0 yeah, I know, we have to divide by 3 ...
*Wednesday, April 16, 2014 at 5:56am*

**Math**

5% growth is just 1200000*1.05^n after n years for #c, we have 1200000*(1.05)^7*(0.92)^8 = 866,581
*Wednesday, April 16, 2014 at 5:48am*

**math**

out of 36 possible rolls, only 4 have the sum < 5: 12 13 21 22 What's the chance of no 6's? 5/6 * 5/6 so, take 1-P(~6,~6) = 11/36
*Wednesday, April 16, 2014 at 5:46am*

**math (Matrix algebra)**

assuming you mean a determinant, and calling your matrix M, I get |M| = 31-3x So, if 31-3x = 25, x=2 The inverse can be seen at http://www.wolframalpha.com/input/?i=inverse+{{-2%2C+1%2C+x%2B2}%2C{3%2C+x-4%2C+5}%2C{0%2C+1%2C+3}}+ substitute in x=2 if you just want...
*Wednesday, April 16, 2014 at 5:38am*

**math (Matrix algebra)**

Enter your data at http://www.gregthatcher.com/Mathematics/GaussJordan.aspx to see all the details
*Wednesday, April 16, 2014 at 5:33am*

**math (Matrix algebra)**

solve the equations by using a) the adjoint matrix b) elementary row operations i) x+y+z=6 2x-y+z=3 x+4y-z=6 ii) 3p-3q+r=1 -3p+5q-2r=-1 p-2q+r=3 iii)-12a+b+17c=-14 2a-b+3c=5 8a+b-13c=-3 thanks sir/madam
*Wednesday, April 16, 2014 at 4:10am*

**math (Matrix algebra)**

if (-2 1 x+2 ) (3 x-4 5 ) =25 (0 1 3 ) p/s : all the value above in one bracket ( ) a) find the value of x b) hence ,find (-2 1 x+2 )^-1 ( 3 x-4 5 ) (o 1 3 ) p/s : all the value above in one bracket ( )
*Wednesday, April 16, 2014 at 4:08am*

**math (Matrix algebra)**

solve the equations by using a) the adjoint matrix b) elementary row operations i) x+y+z=6 2x-y+z=3 x+4y-z=6 ii) 3p-3q+r=1 -3p+5q-2r=-1 p-2q+r=3 iii)-12a+b+17c=-14 2a-b+3c=5 8a+b-13c=-3 thanks sir/madam
*Wednesday, April 16, 2014 at 3:42am*

**Math/Physics**

Why the 1/2 in 1/2*a*time^2?
*Wednesday, April 16, 2014 at 1:22am*

**math**

No you can't
*Wednesday, April 16, 2014 at 12:47am*

**math**

(145*130)/65 = 18850/65 =290 No
*Wednesday, April 16, 2014 at 12:45am*

**math**

(125-115)/125 (10/125 )*100 8%
*Wednesday, April 16, 2014 at 12:36am*

**Math**

Real Estate an office building purchased for $1, 200,000 is appreciating because of rising property values in the city. At the end of each year its value is 105% of its value at the end of the previous year. a. Use a recursive formula to determine what the value of the ...
*Wednesday, April 16, 2014 at 12:32am*

**Math/Physics**

John distance=20*time Jane distance=15*time+1/2 a time^2 set them equal, solve for time then solve for either distance in that time.
*Wednesday, April 16, 2014 at 12:20am*

**math**

you were right i thought so that's why i wrote to you .
*Tuesday, April 15, 2014 at 11:54pm*

**math**

You require space to service 65 vehicles at any one time. Will a facility measuring 145 ft. by 130 ft. be adequate if each vehicle requires 300 sq.ft.?
*Tuesday, April 15, 2014 at 11:49pm*

**Math**

1.A and 2.D
*Tuesday, April 15, 2014 at 11:38pm*

**math**

You sell and service vacuum cleaners. Your price on a particular model is $125. However, to get a service contract, you offer to sell it for $115. How much discount are you giving as a percentage of price (to the nearest tenth)?
*Tuesday, April 15, 2014 at 11:34pm*

**math**

a pair of dice is rolled. what is the probabilty of each of the following? a. the sum of the numbers shown uppermost is less than 5. b. at least one six is cast.
*Tuesday, April 15, 2014 at 11:20pm*

**Math**

Anyone?
*Tuesday, April 15, 2014 at 11:13pm*

**Math/Physics **

John is driving at a constant speed of 20.0 m/s when he passes Jane, who is traveling in the same direction at 15.0 m/s at the moment that John passes her. If Jane is accelerating at 2.0 m/s2, how far will Jane drive before she catches up to John? How much time passes from ...
*Tuesday, April 15, 2014 at 11:13pm*

**Math**

1.Jamilla is building a square sandbox with sides 7 feet long. She wants to put sand 2 feet deep in the box. How much sand should Jamilla order? A.98ft3 B.14ft3 C.49ft3 D.16ft3 2.What happens to the volume of a rectangular prism when each of the dimensions is doubled? A.it ...
*Tuesday, April 15, 2014 at 11:12pm*

**math (Matrix) 2**

if (-2 1 x+2 ) (3 x-4 5 ) =25 (0 1 3 ) a) find the value of x b) hence ,find (-2 1 x+2 )^-1 ( 3 x-4 5 ) (o 1 3 ) p/s : all the value above IS COMBINE in one bracket ( )
*Tuesday, April 15, 2014 at 10:21pm*

**math (Matrix)**

solve the equations by using a) the adjoint matrix b) elementary row operations i) x+y+z=6 2x-y+z=3 x+4y-z=6 ii) 3p-3q+r=1 -3p+5q-2r=-1 p-2q+r=3 iii)-12a+b+17c=-14 2a-b+3c=5 8a+b-13c=-3 thanks sir/madam
*Tuesday, April 15, 2014 at 10:20pm*

**Math**

It still says it is wrong. =/
*Tuesday, April 15, 2014 at 9:52pm*

**Math**

=1/(2-(-1) ∫((1/2)x^2 - x + 3) dx from x = -1 to 2 =1/3 [ (1x-x^3/3 ] from x = -1 to 2 =1/3[2-8/3)-(1-1/3)] 1/3[-2/3-2/3] =0
*Tuesday, April 15, 2014 at 9:36pm*

**MAth**

cos 31° = PQ/20
*Tuesday, April 15, 2014 at 9:31pm*

**Math Grade 3**

84
*Tuesday, April 15, 2014 at 9:24pm*

**math**

y - 4x = 8 (t- chart)
*Tuesday, April 15, 2014 at 9:21pm*

**MAth**

In triangle PQR, <Q=90 degrees, <P=31 degrees and PR=20 cm. Find PQ.
*Tuesday, April 15, 2014 at 9:12pm*

**Math**

the way you typed it, the entire bracket is divided by 2. 5(2x - 10)/2 + 14 = 19 5(x - 5) + 14 = 19 5x - 25 = 19-14 5x = 5 + 25 5x = 30 x = 6
*Tuesday, April 15, 2014 at 9:11pm*

**Math **

5(2x - 10)/2 + 14 = 19 10x - 50/2 + 14 = 19 10x -25 + 14 = 19 I am stuck- help
*Tuesday, April 15, 2014 at 9:06pm*

**Math**

Find the average value of the function f over the interval [-1, 2]. f(x)=1-x^2
*Tuesday, April 15, 2014 at 8:51pm*

**Math**

so when moving from one side of equal sign changes the sign of number/variable. The negative sign in front of brackets changed numbers inside to negatives. Thanks
*Tuesday, April 15, 2014 at 8:37pm*

**MATH**

sin 10.5° = PR/120 PR = 120 sin 10.5° = ....
*Tuesday, April 15, 2014 at 8:32pm*

**Math**

P(x) = 1.3x-.01x^2-30 = -.01x^2 + 1.3x - 30 in more standard notation you will need the vertex. The x of the vertex is -b/(2a) = -1.3/(-.02) = 65 then P(65) = -.01(65)^2 + 1.3(65) - 30 = 12.25 when x = 65
*Tuesday, April 15, 2014 at 8:31pm*

**Math**

I recommend getting rid of brackets first to get nice straightforward terms, then simplify, and then "move" terms from side to side. -5 - x = 2x - 4x - 6 -5 - x = -2x - 6 2x - x = -6 + 5 x = -1 (your -x on the right side should have been +x )
*Tuesday, April 15, 2014 at 8:23pm*

**Math**

In triangle PQR, <P=90 degrees, <Q=10.5 degrees and RQ=120 cm. Find PR.
*Tuesday, April 15, 2014 at 8:07pm*

**Math**

HE HAS NO PROPER TEA (property)
*Tuesday, April 15, 2014 at 8:03pm*

**MATH**

In triangle PQR, <P=90 degrees, <Q=10.5 degrees and RQ=120 cm. Find PR.
*Tuesday, April 15, 2014 at 7:50pm*

**Math**

Given the total profit function P(x) = 1.3x-.01x^2-30, let x represent a number of days and find maximum profit achieved and when that profit is made. Then graph the function and mark the vertex
*Tuesday, April 15, 2014 at 7:49pm*

**3 grade math ms sue**

Lloooooooo
*Tuesday, April 15, 2014 at 7:47pm*

**Math**

1.05^2 - 1 = 10.25 APY Wilder 1.0081666^12 - 1 = 10.2524 APY Cheapskate so go with cheapskate ten years 1.05^20 =2.6532 *85,000 = 225,530.30 1.0008166667^120 = 2.65387 *85,000 = 225,579.18 Cheapskate is 48.88 better
*Tuesday, April 15, 2014 at 7:37pm*

**Math**

-5 - x = 2x - (4x + 6) -5 + 6 = 2x - 4x -x Not sure if I am working this problem correctly
*Tuesday, April 15, 2014 at 7:24pm*

**MATH**

You're very welcome.
*Tuesday, April 15, 2014 at 7:24pm*

**MATH**

THANK YOU FOR HELP ME SO MUCH ON MY HOMEWORK I REAL appreciate it
*Tuesday, April 15, 2014 at 7:22pm*

**Math**

sin 10 = PR/16 PR = 16 sin 10
*Tuesday, April 15, 2014 at 7:19pm*

**Math**

sin 10 = PR/16 PR = 16 sin 10
*Tuesday, April 15, 2014 at 7:18pm*

**Math**

In triangle PQR, <R=90 degrees, <Q=10 degrees and RQ=16 cm. Find PR.
*Tuesday, April 15, 2014 at 7:16pm*

**math**

This problem cannot be solved with only that information.
*Tuesday, April 15, 2014 at 7:14pm*

**Math**

12/25 * 10/14 * 7/18 I see a 7 which can go into 14 I see 5 which can go into 10 and 25 12/5 * 2/2 * 1/18 Now, I see six goes into 12 and 18, so 2/5 * 2/2 * 1/3 2/5 * 1 * 1/3=2/15 check all that.
*Tuesday, April 15, 2014 at 7:14pm*

**Math**

8 - 4 3/4 = 7 4/4 - 4 3/4 = 3 1/4
*Tuesday, April 15, 2014 at 7:12pm*

**Math**

8 inches-4 3/4 inches=3 and 1/4 inches left
*Tuesday, April 15, 2014 at 7:12pm*

**math**

how can you solve this problem ? here X=Y plz help me fast
*Tuesday, April 15, 2014 at 7:10pm*

**Math**

.4
*Tuesday, April 15, 2014 at 7:10pm*

**Math**

Maurice needed to cut a piece of wood for his project that measures 4 3/4 inches . How much wood will he have left if the board that he is cutting from is 8 inches long? Show your work
*Tuesday, April 15, 2014 at 7:09pm*

**math**

Draw a line down the middle. Then 1 across. Next draw an x through the square. This should give you 8 parts.
*Tuesday, April 15, 2014 at 7:09pm*

**math**

http://www.google.com/search?q=square+8+parts&tbm=isch&tbo=u&source=univ&sa=X&ei=irtNU6uYD4qwyASrv4HoAg&ved=0CFMQsAQ&biw=1366&bih=643
*Tuesday, April 15, 2014 at 7:07pm*

**Math**

In triangle PQR, <R=90 degrees, <Q=10 degrees and RQ=16 cm. Find PR.
*Tuesday, April 15, 2014 at 7:01pm*

**math**

how to seperat square into 8 parts
*Tuesday, April 15, 2014 at 6:59pm*

**Math**

Jason Printing has $85,000 to invest. They can invest in Wilder Revenue at 10% compounded semiannually or at Cheapskate Investments at 9.8% compounded monthly. a) Calculate the two APYs and compare them to determine your answer. Make sure to distinguish which APY belongs to ...
*Tuesday, April 15, 2014 at 6:51pm*

**Math**

time upriver=distance/(S-2) time downriver= distance/(s+2) 8hours=79.2 ( 1/(s-2) + 1/(s+2)) a bit of algebra, but get a common denominator on the right (s^2-4), 8hours=79.2 ( s+2 + s-2)/s^2-4 then combine, put it in quadratic form, and solve for s.
*Tuesday, April 15, 2014 at 6:50pm*

**Math**

I need help with 12 over 25 times 10 over 14 times 7over 18 and then putting it into simplest form
*Tuesday, April 15, 2014 at 6:49pm*

**Math**

The mad river flows at a rate of 2 KM/H. In order for a boat to travel 79.2 KM of River and then return in a total of eight hours how fast must about travel in Still water?
*Tuesday, April 15, 2014 at 6:46pm*

**5th grade Math**

I don't get this
*Tuesday, April 15, 2014 at 6:10pm*

**Math **

The answer is 9
*Tuesday, April 15, 2014 at 6:08pm*

**Math**

0.859 * 48.3 = $41.49
*Tuesday, April 15, 2014 at 5:51pm*

**Math**

The price of gas is 85.9 cents per Litre. If Brenda needs 48.3 L of gas to fill her gas tank, how much will she pay? Please show the steps.
*Tuesday, April 15, 2014 at 5:40pm*

**Math**

The answer is you don't know crap....
*Tuesday, April 15, 2014 at 5:30pm*

**Probability**

yes please someone who loves math¡
*Tuesday, April 15, 2014 at 4:44pm*

**math**

Real Estate an office building purchased for $1, 200,000 is appreciating because of rising property values in the city. At the end of each year its value is 105% of its value at the end of the previous year. a. Use a recursive formula to determine what the value of the ...
*Tuesday, April 15, 2014 at 4:33pm*

**math**

Nooo
*Tuesday, April 15, 2014 at 4:21pm*

**Math PIZZAZZ**

Math pizzazz worksheet answers book D page 31Math pizzazz worksheet answers book D page 31Math pizzazz worksheet answers book D page 31Math pizzazz worksheet answers book D page 31Math pizzazz worksheet answers book D page 31Math pizzazz worksheet answers book D page 31Math ...
*Tuesday, April 15, 2014 at 3:42pm*

**math**

5 * .011 * p = 82.5
*Tuesday, April 15, 2014 at 3:17pm*

**math**

An investment earning simple interest at a rate of 1.10% per annum for a term of 5 years earned $82.50 in interest. What was the principal?
*Tuesday, April 15, 2014 at 3:11pm*

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