Monday
April 21, 2014

Homework Help: Math

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Recent Math Questions

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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=139​7441682
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=138​6034705
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-g5ow​go
Monday, April 14, 2014 at 11:08pm

math
http://www.google.com/webhp?source=searc​h_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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