Monday

April 21, 2014

April 21, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**math**

10 * .025 * 5000 5000 + part A (ignoring inflation :)
*Tuesday, April 15, 2014 at 3:03pm*

**Math**

You're welcome.
*Tuesday, April 15, 2014 at 3:00pm*

**math**

Jamal invested $5000.00 in an account that earns 2.50% simple interest per annum for a term of 10 years. A.) How much interest will he earn? B.) How much will his investment be worth at the end of the term?
*Tuesday, April 15, 2014 at 2:54pm*

**math**

e
*Tuesday, April 15, 2014 at 2:41pm*

**Math (?)**

Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. Without more specifics, we don't understand either. What is your question?
*Tuesday, April 15, 2014 at 2:29pm*

**math**

First of all, the range is not a measure of central tendency. The mean acts as a fulcrum (balance point) for the distribution, therefore outliers on one side will draw the mean out to that side. In other words, the distribution is significantly skewed. In a skewed distribution...
*Tuesday, April 15, 2014 at 2:25pm*

**Math**

Thanks!
*Tuesday, April 15, 2014 at 2:22pm*

**Math**

how did you get BE=32?
*Tuesday, April 15, 2014 at 2:21pm*

**Math**

Yes. It's correct now.
*Tuesday, April 15, 2014 at 2:20pm*

**Math**

11xy + x - y Is this correct?
*Tuesday, April 15, 2014 at 2:12pm*

**math (matrix)**

I assume you meant the determinant 24 x + 3 x^2 + 6 x + 10 - 9x = 25 3 x^2 + 21 x -15 = 0 x^2 + 7 x - 5 = 0 x =-7/2 +/- (1/2) sqrt(69) What a mess, assume you have a typo. To invert matrix use http://matrix.reshish.com/inverse.php
*Tuesday, April 15, 2014 at 2:02pm*

**Math**

No. What happened to y? Where did you get -1?
*Tuesday, April 15, 2014 at 1:58pm*

**math (matrix)**

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 ( )
*Tuesday, April 15, 2014 at 1:45pm*

**Math--Calculus**

Hmm. Don't know...
*Tuesday, April 15, 2014 at 1:42pm*

**Math**

Sorry typo error. should be 7xy + 4xy + x + y - 2y = 11xy + x - 1 is this correct
*Tuesday, April 15, 2014 at 1:42pm*

**Math**

Ask a tutor
*Tuesday, April 15, 2014 at 1:41pm*

**Math**

7xy + 4xy + x + y - 27 = 11xy + x + y - 27
*Tuesday, April 15, 2014 at 1:34pm*

**Math**

7xy + 4xy + x + y - 27 = 11xy + x - 1 is this correct
*Tuesday, April 15, 2014 at 1:30pm*

**math**

If I had to divide 680 cm^3/s by 1.767 cm^2 and needed an answer in m/s..how would I do that? Just cancel out two cm's and then divide by 0.01?
*Tuesday, April 15, 2014 at 1:26pm*

**Math**

No. Notice that it's a negative 2y.
*Tuesday, April 15, 2014 at 1:21pm*

**Math**

7xy + 4xy + x + y - 2y = 11xy + 3y + x Is this correct?
*Tuesday, April 15, 2014 at 1:18pm*

**math**

Pregnancy Test Results Positive Test Result (Pregnancy is indicated) Negative Test Result (Pregnancy is not indicated) Subject is pregnant 80 5 Subject is not pregnant 3 11 a) Based on the results in the table, what is the probability of a women being pregnant if the test ...
*Tuesday, April 15, 2014 at 1:03pm*

**math**

Consider F and C below. F(x, y, z) = yz i + xz j + (xy + 14z) k C is the line segment from (2, 0, −2) to (5, 5, 1) (a) Find a function f such that F = ∇f. f(x, y, z) = (b) Use part (a) to evaluate integral C ∇f · dr along the given curve C.
*Tuesday, April 15, 2014 at 11:02am*

**math**

first bounce --- 3 ft 2nd bounce = 2(1/4)(3) = 6(1/4) 3rd bounce = 2(1/4)(3)(1/4) = (6)(1/4)^2 4th bounce = ... = (6)(1/4)^3 .... so we have 3 + 6(1/4) + 6(1/4)^2 + 6(1/4)^3 + ... to infinity = 3 + 6(1/4) (1 + 1/4 + (1/4)^2 + ...) from the 2nd term on, we have a geometric ...
*Tuesday, April 15, 2014 at 10:47am*

**Math**

short leg --- x longer leg --- 2x-1 x^2 + (2x-1)^2 = 17^2 x^2 + 4x^2 - 4x + 1 = 289 5x^2 - 4x - 288 = 0 (x-8)(5x + 36) = 0 x = 8 or x is an inadmissable negative number short leg = 8 ft long leg = 15 ft area = (1/2)(8)(15) = 60 ft^2
*Tuesday, April 15, 2014 at 10:38am*

**math**

A ball rebounds to one quarter from which it was dropped. approximate the total vertical distance the ball after being dropped from 3ft above the ground ,until it comes to rest
*Tuesday, April 15, 2014 at 10:13am*

**Math**

The longer leg of a triangle is one foot less than twice the shorter leg. The hypotenuse is 17 feet long. Find the area of the triangle.
*Tuesday, April 15, 2014 at 10:13am*

**Business Math**

yes
*Tuesday, April 15, 2014 at 9:36am*

**Math**

plug your data into this ... http://davidmlane.com/hyperstat/z_table.html click on "above" and enter 6 to get .3694 (that's very high SD )
*Tuesday, April 15, 2014 at 8:22am*

**math**

3 important rules of logs 1. log (AB) = log A + log B 2. log(A/B) = log A - log B 3. log A^n = nlogA so 2log15 + log(5-x) - log 4x = 2 log 15^2 + log(5-x) - log 4x = 2 log (225(5-x)/(4x) ) = 2 225(5-x)/(4x) = 10^2 = 100 400x = 1125 - 225x 625x = 1125 x = 1125/625 = 9/5 or 1.8
*Tuesday, April 15, 2014 at 7:53am*

**Math**

The yearly returns of a stock are normally distributed with a mean of 5.1% and standard deviation of 2.7%. Find the probability of a yearly return being greater than 6%.
*Tuesday, April 15, 2014 at 6:16am*

**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 6:02am*

**math (Matrix)**

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 )
*Tuesday, April 15, 2014 at 5:48am*

**math**

helo sir/madam can u help me to solve this problem sOLVE 2log 15 +log(5-x)- log4x=2
*Tuesday, April 15, 2014 at 5:13am*

**math**

the bisector BD and half the chord CD form a right triangle with the radius BC BC^2 = 3^2+5^2
*Tuesday, April 15, 2014 at 5:10am*

**math**

ignoring all those trailing zeros, 58/6 = 9.67
*Tuesday, April 15, 2014 at 5:07am*

**math**

Assuming a 360-day year, 8000 * .095 * 1/3 = 253.33
*Tuesday, April 15, 2014 at 5:06am*

**math**

Assuming you mean (8^y)^y, we have 8^y^2 = 2^3y^2 1/32^y = 2^-5y 4 = 2^2 3y^2-5y = 2 y = 2 or -1/3
*Tuesday, April 15, 2014 at 5:03am*

**math**

find the values of Y of the following equation : (8^x)^y 1/32^y = 4
*Tuesday, April 15, 2014 at 4:18am*

**math**

Compute the amount of interest earned in the following simple interest problem. A deposit of $8,000 at 9.5% for 120 days.
*Tuesday, April 15, 2014 at 1:20am*

**math**

Zeller, Inc., has 60,000 shares of stock outstanding. Zeller declares a dividend of $580,000. What is the dividend per share?
*Tuesday, April 15, 2014 at 1:15am*

**math**

A piece of a broken wheel is shown. It was taken to a machine shop to be replaced with a new “whole” wheel. Find the radius of the wheel if AC=10cm, BD= 3cm, and D is the midpoint of AC. Round to the nearest hundredth. (note: keep in mind this circle/wheel is not ...
*Tuesday, April 15, 2014 at 12:25am*

**math**

5n + 25q = 325 q = n-5 now just plug in q and solve for n.
*Tuesday, April 15, 2014 at 12:17am*

**math**

the one with an x term, but no higher powers.
*Tuesday, April 15, 2014 at 12:13am*

**math**

Which of the following situations is an example of a linear function?
*Tuesday, April 15, 2014 at 12:04am*

**Math**

did this yesterday http://www.jiskha.com/display.cgi?id=1397441682
*Tuesday, April 15, 2014 at 12:04am*

**Math**

profit = 6n - 2n - 400 - 100 = 4n + 600 , where n is the number of people 4n - 500 = 400 4n = 900 n = 225 need 225 people to make $400
*Tuesday, April 15, 2014 at 12:02am*

**Math**

Did this for Lynda back in December http://www.jiskha.com/display.cgi?id=1386034705
*Monday, April 14, 2014 at 11:59pm*

**math**

The account balance on April 1st is $50.51. On April 15th a payment of $15.00 is made. On April 25th a purchase of $19.27 is made. The annual rate is 18%. What is the finance charge using the previous balance method? What is the new balance?
*Monday, April 14, 2014 at 11:39pm*

**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 ...
*Monday, April 14, 2014 at 11:33pm*

**Math**

An organization is planning a dance. The band will cost $400 and advertising costs will be $100. Food will be supplied at $2 per person and tickets cost $6 per person. How many people will have to attend the dance if the organization want to profit $400?
*Monday, April 14, 2014 at 11:32pm*

**math**

Chris Shopper received a $800 discount loan to purchase a washer and dryer. The loan was offered at 10% for 120 days. What are the proceeds?
*Monday, April 14, 2014 at 11:31pm*

**Math**

Richard Simmons is selling his house. He has a choice of taking $125,000 today or $135,000 in 6 months. If he takes the money today, he can invest it at Valley Bank at 5% interest compounded monthly. a. How much would be in the account after six months if he took the 125,000. ...
*Monday, April 14, 2014 at 11:26pm*

**Math**

The thing is that I did get 7/8(log9-log1) I got 7/8(log8-log1). but thanks for your help.
*Monday, April 14, 2014 at 11:25pm*

**Math**

poop
*Monday, April 14, 2014 at 11:18pm*

**Math**

As I showed you earlier, it is ∫[0,8] 7/(x+1) dx ---------------------- (8-0) = 1/8 (7log(x+1) [0,8]) = 7/8 (log9-log1) = 7/8 log9 what were your solution steps?
*Monday, April 14, 2014 at 11:12pm*

**Math**

850000(1+.06/4)^(4*3.5)/4.75 = 220,419 850000(1+.06/4)^(4*5)/5.10 = 224,476
*Monday, April 14, 2014 at 11:08pm*

**Math**

This little YouTube fits your problem quite nicely http://www.youtube.com/watch?v=62Lj-g5owgo
*Monday, April 14, 2014 at 11:08pm*

**math**

http://www.google.com/webhp?source=search_app#q=4%2C580%2B250+%3D+
*Monday, April 14, 2014 at 11:06pm*

**math**

have you tried your calculator?
*Monday, April 14, 2014 at 11:06pm*

**math**

Whats 4,580+250
*Monday, April 14, 2014 at 10:56pm*

**Math**

A company is planning to expand its business in a few years. New plant construction costs are estimated to be $4.75 per square foot. The company invests $850,000 today at 6% compounded quarterly. a. How many square feet could be built in 3 1/2 years? b. If the company waits ...
*Monday, April 14, 2014 at 10:56pm*

**math**

Jerry-height = 50 + (1/24)m Adam-height = 47 + (1/8)m they have the same height when ... 50 + m/24 = 47 + m/8 3 = m/8 - m/24 m/12 = 3 m = 36 or, from 50 + m/24 = 47 + m/8 multiply each term by 24 to get rid of fractions 1200 + m = 1128 = 3m 72 = 2m m = 36
*Monday, April 14, 2014 at 10:55pm*

**Math**

Do you mean that 20% of a number is 56? 0.2 x = 56 x = 56/0.2 x = 280 56 is 20% of 280.
*Monday, April 14, 2014 at 10:52pm*

**Math**

let the speed of the river current be x mph speed going upstream = 9 -x mph speed going downstream = 9 + x mph 10/(9-x) = 20/(9+x) 90 + 10x = 180 - 20x 30x = 90 x = 3 the speed of the river is 3 mph
*Monday, April 14, 2014 at 10:49pm*

**Math**

Find the average value of the function f over the indicated interval [0, 8]. f(x) = 7/(x + 1) I keep getting the wrong answer.
*Monday, April 14, 2014 at 10:49pm*

**Math**

Find the average value of the function f over the interval [-1, 2]. f(x) = 1-x^2
*Monday, April 14, 2014 at 10:48pm*

**Math**

Nikko knows that 20 percent of a number 56. To find the number, she uses the equation 56= 2over5x.Is Nikko correct. Explain.
*Monday, April 14, 2014 at 10:36pm*

**math**

Jerry is 50 inches tall growing at a rate of 1/24 inches per month. Adam is 47 inches tall growing at a rate of 1/8 per month. If they continue to grow at these rates for the next 4 years in how many months will they be the same height? Solve two different ways and show ...
*Monday, April 14, 2014 at 10:14pm*

**Math**

Brian's boat has a top speed of 9 miles per hour in still water. While traveling on a river at top speed, he went 10 miles upstream in the same amount of time he went 20 miles downstream. Find the rate of the river current.
*Monday, April 14, 2014 at 10:00pm*

**Business Math**

Do you mean that 12 months to be a year?
*Monday, April 14, 2014 at 9:25pm*

**math**

6. Which is the best measure of central tendency for the type of data below–the mean, the median, or the mode? Explain. Hours of sleep each night Median; there will be outliers Range; there are no outliers Mode; the data are non-numeric Mean; the outliers are limited its ...
*Monday, April 14, 2014 at 9:22pm*

**Business Math**

Compute the simple interest. Assume 1 month to be of a year. Round your answer to the nearest cent. Principal Rate Time Interest $1,025 4.5% 16 months
*Monday, April 14, 2014 at 9:19pm*

**Math**

Find the average value of the function f over the interval [-1, 2]. f(x) = 1-x^2
*Monday, April 14, 2014 at 9:15pm*

**Math**

Find the average value of the function f over the indicated interval [0, 8]. f(x) = 7/(x + 1) I keep getting the wrong answer.
*Monday, April 14, 2014 at 9:14pm*

**math**

A jar of coins has only nickels and quarters, which are worth a total of $3.25. There are 5 fewer quarters than nickels. How many quarters and nickels are in the jar?
*Monday, April 14, 2014 at 9:07pm*

**math trigonometry**

the law of cosines says 68^2 = 53^2 + 71^2 - 2*53*72 cosθ so, cosθ = (68^2-53^2-71^2)/(-2*53*72) = 0.42269 θ = 65°
*Monday, April 14, 2014 at 8:40pm*

**Math**

using FOIL, you get (2n)(6n) + (2n)(1) + (2)(6n) + (2)(1) = 12n^2 + 2n + 12n + 2 = 12n^2 + 14n + 2
*Monday, April 14, 2014 at 8:36pm*

**Math**

(2n + 2)(6n + 1) Find the product.
*Monday, April 14, 2014 at 7:45pm*

**math trigonometry**

At night, a security camera pans over a parking lot. The camera is on a post at point a which is 53m from point c and 71 m from point b.the distance from B to c is 68m. Calculate the angle through which the camera pans
*Monday, April 14, 2014 at 7:22pm*

**math trigonometry**

At night, a security camera pans over a parking lot. The camera is on a post at point a which is 53m from point c and 71 m from point b.the distance from B to c is 68m. Calculate the angle through which the camera pans
*Monday, April 14, 2014 at 7:22pm*

**math**

Multiply: 0.08 * 15 = ?
*Monday, April 14, 2014 at 6:39pm*

**math**

What is 8% of 15?
*Monday, April 14, 2014 at 6:33pm*

**math, science**

a vertical shaft 150mm in diameter rotating 100r.p.m resrs on a flat end foot step bearing.the shaft carries a vertical load of 20kN assuming uniform pressure distribution and coefficient equal to 0.05, estimate power lost in friction
*Monday, April 14, 2014 at 6:32pm*

**math**

No. You can try it. What do you find when you cut a square in half?
*Monday, April 14, 2014 at 6:28pm*

**math**

tameka draws a line that would cut a square in half. she says makes 2 smaller squares. is tameka correct? explain
*Monday, April 14, 2014 at 6:24pm*

**math**

(pi * .8^2 * .5 m^3) ----------------------- = 32 s (pi * .1^2 * 1 m^3/s)
*Monday, April 14, 2014 at 5:46pm*

**trying to understand math**

How many shifts do each of you work per week?
*Monday, April 14, 2014 at 5:44pm*

**trying to understand math**

in March, total sales were 9.00 * 125 * 31 = 34875.00 In April, (assuming 30 days, 15 days per half-month) 1st half: 9.00*125 * 15 = 16875.00 2nd half: 11.00*125 * 15 = 20625.00 total: 37500 avg at 11.50 = 43125 so she falls 5625 short. Two items need clarification... There&#...
*Monday, April 14, 2014 at 5:42pm*

**math**

I dont think this answer is correct because 3*42=126 than + 42 = 168 not 164
*Monday, April 14, 2014 at 5:41pm*

**Math**

distance is ∫[0,8] 3t√(640t^2) dt = 512
*Monday, April 14, 2014 at 5:31pm*

**Math**

P = 6 + 6*0.019*42 = 10.8 Billion.
*Monday, April 14, 2014 at 5:29pm*

**Math**

that would be ∫[0,3] 300t^2/(t^3+32) + 5 dt let u = t^3 + 32 du = 3t^2 dt and now you have ∫[32,59] 100/u du + ∫[0,3] 5 dt = 15 + 100log(59/32)
*Monday, April 14, 2014 at 5:29pm*

**Math**

and there's your answer.
*Monday, April 14, 2014 at 5:24pm*

**Math**

∫[-1,2] 1-x^2 dx ----------------------- (2-(-1))
*Monday, April 14, 2014 at 5:23pm*

**Math**

17*23.125=393.125
*Monday, April 14, 2014 at 5:23pm*

**Math**

∫[0,8] 7/(x+1) dx ---------------------- (8-0)
*Monday, April 14, 2014 at 5:22pm*

**Math**

that would be (∫[0,8] 5e^-x dx)/(8-0) = 5/8 (1-e^-8)
*Monday, April 14, 2014 at 5:21pm*

**Math**

17 is 17*1 so, what is 17*23.125?
*Monday, April 14, 2014 at 5:15pm*

**Math**

If Logan's family can drive 23.125 miles on 1 gallon of gas, how far can they drive on 17 gallons?
*Monday, April 14, 2014 at 5:13pm*

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