Friday

July 31, 2015

July 31, 2015

**College Algebra**

A sky diver jumps from a reasonable height above the ground. The air resistance she experiences is proportional to her velocity, and the constant of proportionality is 0.23. It can be shown that the downward velocity of the sky diver at time t is given by v(t) = 180(1 − ...
*Friday, July 31, 2015 by Melany*

**College Algebra**

A radioactive substance decays in such a way that the amount of mass remaining after t days is given by the function m(t) = 9e−0.012t b) How much of the mass remains after 49 days? (Round your answer to one decimal place.)
*Friday, July 31, 2015 by Melany*

**College Algebra **

Use the Laws of Logarithms to expand the expression. loga(x^5/yz^6) and this was my answer and I got it wrong can any one tell me what I did wrong and what they got? 5log(x)-log(y)-6log(z)
*Friday, July 31, 2015 by Melany*

**Algebra 2**

Thank you Steve and others that have answered my questions before. 5 x 6 - 2 x 4 = 30 - 8 I believe this is the substitution method. Correct? Thank you.
*Thursday, July 30, 2015 by Mom50*

**Algebra I I **

If j = 6, then j x 2 = 6 x 2 If this the multiplication property of equality of the substitution property? Thank you for your help.
*Thursday, July 30, 2015 by Mom50*

**algebra **

george drove to two town at 60 miles per hour and drove back home at 30 miles per hour. what is the distance to town if the whole trip took 9 hours hrs
*Thursday, July 30, 2015 by heather*

**algebra**

What is the axis of symmetry in -7/x^2-4
*Thursday, July 30, 2015 by roger*

**algebra**

simplify mn+mp+nq+pq /n+p
*Thursday, July 30, 2015 by cecilia*

**Algebra II**

Can you please let me know which property this is? If h = 7 + 8 and 7 + 8 = 15, then h = 15 I believe it is the transitive property of equality Thank you!
*Wednesday, July 29, 2015 by Mom50*

**math algebra**

Jo needs to know which of the following cannot be a prime number whenever p is a prime number greater than 2001. A. p-2 B. p+2 C. p+999 D. p+9990 Im stuck
*Wednesday, July 29, 2015 by Ben*

**College Algebra**

A radioactive substance decays in such a way that the amount of mass remaining after t days is given by the function m(t) = 9e−0.012t where m(t) is measured in kilograms. (a) Find the mass at time t = 0.
*Wednesday, July 29, 2015 by Melany*

**College Algebra**

Use the definition of the logarithmic function to find x. (a) ln x = 6 x = (b) ln e^2 = x x = can someone explain to me how to do this?
*Wednesday, July 29, 2015 by Melany*

**College Algebra**

Use a calculator to evaluate the function at the indicated values. Round your answers to three decimals. g(x) =(2/3)^x-1 g(1.5)= g(square root of 3)= g(2pie)= g(-4/5)
*Wednesday, July 29, 2015 by Melany*

**College Algebra**

Use the Laws of Logarithms to combine the expression. 1/5log(x + 3)^5 +1/3 [log x^6 − log(x^2 − x − 12)^3]
*Wednesday, July 29, 2015 by Melany*

**College Algebra**

Use the Laws of Logarithms to expand the expression. loga(x^5/yz^6) Can anybody help me step by step pleassse?
*Wednesday, July 29, 2015 by Melany*

**Intro to Algebra- Geometry**

A sail on a sailboat has a base of 10 ft. and a height of 18 ft. and needs to be sealed with water repellent. One can of water repellent will cover 50 sq. ft., how many cans will be needed to cover the sail?
*Tuesday, July 28, 2015 by Anna*

**Intro to Algebra**

Sally is making a tablecloth and wants to put lace around the edges. How much lace will she need to purchase if the radius is 1.5 ft.
*Tuesday, July 28, 2015 by Anna*

**Algebra**

Suppose f is a polynomial such that f(0)=47, f(1)=32, f(2)=-13, and f(3)=16. What is the sum of the coefficients of f?
*Tuesday, July 28, 2015 by Lily*

**Algebra**

3.29x=5.5√(x)+10,000 How in the world do I solve for x without using a calculator? I swear I've been on this for hours. I know the answer is 3133 because I estimated the answer and then began plugging in numbers until I got to the actual answer.
*Tuesday, July 28, 2015 by Enrique*

**Algebra **

Taxi charges are $2.40 plus $0.40 per kilometer for any trip in a town. If Sarah's taxi fare was $8.00, how far did she travel?
*Tuesday, July 28, 2015 by Safiyya*

**Algebra 2 CP**

The Mendes family bought a new house 11 years ago for $100,000. The house is now worth $196,000. Assuming a steady rate of growth, what was the yearly rate of appreciation? I'm not sure how to set this problem up at all. Please help :(
*Tuesday, July 28, 2015 by Tyjaha*

**Algebra**

The mean is 18.1 the data set for 13 is -1.7 What is the standard deviation for this data set.
*Monday, July 27, 2015 by Malu*

**algebra**

I get f(5)=2*5^2-20*5+5=2*25-100+5=50-100+5=55 not sure what doing wrong
*Monday, July 27, 2015 by roger*

**algebra**

f(x)=2x^2-20x+5 find vertex is(5,55)correct
*Monday, July 27, 2015 by roger*

**Algebra**

Use factoring to solve 5^4-8x^2=0 Not sure where to begin I got x^2(5x^2)-8=0
*Monday, July 27, 2015 by sue*

**Algebra**

A woman spent 75 more than 75% of her money in one store. She then spent 75 more than 75% of her remaining money in another store. She did the same in a third store and had only 700 left. How much money did she originally have? My answer is 51,100. Is this correct? Thank you.
*Monday, July 27, 2015 by Jeysi*

**algebra**

5x-1=1 32x+5=17
*Monday, July 27, 2015 by beverly*

**College Algebra**

Find a fourth-degree polynomial with integer coefficients that has zeros 4i and −1, with −1 a zero of multiplicity 2. (Use x for the variable.) can somebody help me do this?
*Monday, July 27, 2015 by Melany*

**Algebra**

m+7/m^2+4m-21
*Sunday, July 26, 2015 by Alex*

**algebra**

When my answer is 4=x and I rewrite it as x=4, is that illustrating a property? Why am I able to do that?
*Sunday, July 26, 2015 by Lisa*

**Algebra 2 (probability)**

Sara has 5 flower pots with a unique flower. The pots are arranged along a line. One day she decided to change their order the condition that no pots that were originally next to each other remain next to each other. Find out the number of possible orders satisfying the ...
*Sunday, July 26, 2015 by Johnson*

**Algebra**

there are 24 candies in a box. there are 3 times as many candies with nuts as candies without nuts. how many candies with nuts are in the box
*Saturday, July 25, 2015 by Trevor*

**College algebra**

how do you find the population (in thousands) of people of a city is growing according to the function P(t)=1500(2)^0.144t, where t is the number of years since 2001. I need to find the population of the city in 2001 and in 2008.
*Friday, July 24, 2015 by Lindy*

**Algebra**

Name the axis to which major axis is parallel and find the center of 9(x + 1)² + 27(y - 1)² = 81
*Friday, July 24, 2015 by Kenny*

**algebra**

(-a-6b +4)3ab The answer I got was 3(-a-6b+4)ab
*Friday, July 24, 2015 by Dee365*

**Algebra 2**

Hey, I just have two questions, Thanks. 1. Find the exact solutions of x² - (y - 6)² = 36 and y = -x² 2. Solve the system,4x² + y² = 20 and y = 4x.
*Thursday, July 23, 2015 by Tony*

**algebra**

$50,000 was invested in bonds at %6and stocks at 8%. how much money was invested in each if the total return was $32,000?
*Thursday, July 23, 2015 by Anonymous*

**College Algebra**

The sum of three consecutive natural numbers is 966. Find the numbers.
*Thursday, July 23, 2015 by Richard*

**Algebra 1**

Can someone please help me understand this. This is not graded or anything I just want to know how to do this. - Chloe rolls two-sided number cubes and adds the numbers showing on the cubes. What is the probability that the sum of the number cubes is even or five?
*Wednesday, July 22, 2015 by Sakura*

**ALGEBRA**

A car travels 20 kph faster than a truck. The car covers 350 km in two hours less than the time it takes the truck to travel the same distance. What is the speed of the car? How about the truck?
*Wednesday, July 22, 2015 by Sylvia*

**Algebra**

4+ (-8) +12+
*Wednesday, July 22, 2015 by Dee365*

**Algebra**

The length of a rectangle is two meters less than twice the width. If the area of the rectangle is 222 square meters, find the dimensions
*Wednesday, July 22, 2015 by Eleejah*

**Algebra**

If a bottle and a cork cost $2.00, and the bottle is $1.00 more than the cork, what is the cost of each?
*Wednesday, July 22, 2015 by Mark *

**College Algebra**

f(x) = x2 + 11x, x ≥ − 11/2 find the inverse
*Wednesday, July 22, 2015 by Lydia*

**College Algebra**

A function f has the following verbal description: "Multiply by 5, add 9, and then take the fifth power of the result." and find the inverse?
*Wednesday, July 22, 2015 by Lydia*

**Algebra**

Find the net change in the value of the function between the given inputs. g(t) = 8 − t2; from −6 to 9
*Tuesday, July 21, 2015 by Lydia*

**ALGEBRA**

In a water refilling stationthe time that a pipe takes to fill a tank is 10 minutes more than the time that another pipe takes to fill the same tank. If the two . If the two pipes are open at the same time, they can fill the tank in 12 minutes. How many minutes does each pipe ...
*Tuesday, July 21, 2015 by Sylvia*

**Algebra**

If g(x) = x2 + 8x with x ≥ −4, find g−1(20)
*Tuesday, July 21, 2015 by Lydia*

**Algebra**

A print shop makes bumper stickers for election campaigns. If x stickers are ordered (where x < 10,000), then the price per sticker is 0.28 − 0.000002x dollars, and the total cost of producing the order is 0.087x − 0.0000005x2 dollars. Use the fact that profit...
*Tuesday, July 21, 2015 by miriam*

**Algebra**

f(x) = 4x2; x = 2, x = 2 + h this is telling me to find the average rate of change and the net change? I found one but my answer is disapproved from a friend.
*Monday, July 20, 2015 by miriam*

**College Algebra**

If g(x) = x2 + 6x with x ≥ −3, find g−1(55) I need help solving this problem this is an example but it does not thoroughly is explained. :/
*Monday, July 20, 2015 by Lydia*

**algebra 1**

Let x^2-y^2=20 and x-y=2. What is the value of x+y?
*Monday, July 20, 2015 by jasmine*

**Algebra**

Explain how the graph of f(x) = ln x can be used to obtain the graph of g(x) = e^(x-2).
*Monday, July 20, 2015 by Stephanie*

**Algebra**

Explain why an even function does not have an inverse that is a function.
*Monday, July 20, 2015 by Stephanie*

**Algebra**

Find the largest three-digit number that can be written in the form 3^m + 2^n, where m and n are positive integers.
*Saturday, July 18, 2015 by Mr. Alexander*

**Algebra**

Tom took five math tests and got an integer score on each of them. He never scored higher than 90, and his lowest score was the fourth test. If his average score, rounded to the nearest integer, was 82, what is the lowest possible score he could have gotten on the fourth test?
*Saturday, July 18, 2015 by Mr. Alexander*

**College Algebra II**

A patient’s cost for a hospital stay is determined as follows: Admission = $50 Room charge: first night: $1000 nights 2-4: $1500 per night night 5 and beyond: $2000 per night Surgery: $8500 per surgeon, plus $3000 for an anesthesiologist (a) What would be the cost of a ...
*Saturday, July 18, 2015 by Lucas*

**algebra**

fee at fair is $2 per child and $4 per adult. on a certain day 2000 people enter and $6000 is profited. How many child and adults went to the fair.
*Friday, July 17, 2015 by sandra rodgers*

**Algebra 2**

Can someone help me with the following please What property is the following: a(b + 0) additive inverse property - this was confirmed from previous equation = a x b + a x 0 Distributive. (I think) = a x b + 0. Multiplication property of zero (I think) = a x b. Additive ...
*Friday, July 17, 2015 by Mom50*

**algebra 2**

If an observer is 200 ft from a building and the angle of elevationto the top of a building is 60°,what is the height of the building?
*Friday, July 17, 2015 by Kayla*

**Algebra **

Need help on how to solve system of equations 2x - y + z = -7, x - 3y + 4z = -19, and -x + 4y - 3z = 18.
*Thursday, July 16, 2015 by Bern*

**Intermediate algebra**

A collection of nickels dimes and quarters consists of 50 coins with a total of $5.50. If there are two times as many dimes as quarters find the number of each type of coins?
*Wednesday, July 15, 2015 by Hope*

**Algebra 2**

Evaluate 20(0.5)^(n-1) when n= 3 to 12. Use sigma notation .
*Wednesday, July 15, 2015 by Anonymous*

**algebra**

A country's population in 1995 was 175 million. In 2000 it was 181 million. Estimate the population in 2020 using the exponential growth formula. Round you answer to the nearest million. P=Ae^kt
*Wednesday, July 15, 2015 by bob*

**algebra**

solve x^4+px^3+qx^2+rx+s=o
*Wednesday, July 15, 2015 by yamuna*

**Algebra**

Solve for x: X-1/7=2x-2/3x-1
*Wednesday, July 15, 2015 by Daniela*

**algebra**

If the sides of the rectangle are (fq-8)dm and (f^2g^2 + 8fg + 64) dm. what is the area of the rectangle ? Please Help me :\ and thank you for those who answer :)
*Tuesday, July 14, 2015 by Camz*

**algebra**

prove that (4x-2)^2 = 16x^2 - 16x + 4 if x=2 thank you for those who answer :)
*Tuesday, July 14, 2015 by Camz*

**algebra**

find the area of the square whose side is (5m^2 + 7) cm. Please help me :\ and thank you for those who answer my question :)
*Tuesday, July 14, 2015 by Camz*

**algebra**

(sqrt(x^2+y^2+100x+2500))-(sqrt(x^2+y^2-100x+2500))=60
*Tuesday, July 14, 2015 by kjk*

**algebra**

what is the slope of 2y=6x
*Tuesday, July 14, 2015 by Diana Compton*

**Algebra**

9. When doctors prescribe medicine, they must consider how much the drug’s effectiveness will decrease as time passes. If each hour a drug is 20% less effective as the previous hour, at some point the patient will not be receiving enough medicine and must be given ...
*Monday, July 13, 2015 by Daniela*

**Algebra **

8. Mark wants to purchase a combination of at least 16 turkey subs or roast beef subs for a party. Each turkey sub, , is priced at $5 and each roast beef sub, , is priced at $4. Mark has at most $80 to spend on the subs. A. Write a system of inequalities that can be used to ...
*Monday, July 13, 2015 by Daniela*

**Algebra **

Problem solving (point of intersection) You are considering changing your cell phone plan . Company A offered a flat fee of $40 plus 10cents for each additional min of use. Company B offers a monthly flat fee of $20 plus 15 cents for each additional min of use. What plan would...
*Monday, July 13, 2015 by Justin*

**algebra**

-2(x-3y)-3x+5y)-(6x-8y)
*Monday, July 13, 2015 by anne*

**College Algebra**

A rectangular parcel of land is 20 ft longer than it is wide. Each diagonal between opposite corners is 100 ft. What are the dimensions of the parcel? This is an Example in the book but it does not clarify in the text book, Can anybody please show me how to do this?
*Monday, July 13, 2015 by Lydia*

**algebra **

A company that manufactures bikes has a fixed cost of $8,000. It cost $800 to produce each bike. The total cost for the company is a sum of fixed cost and variable costs. Write the total cost, C, as a function of the number of bikes produced x then find C(70). Find the cost ...
*Sunday, July 12, 2015 by pam*

**Intermediate Algebra**

If a 9-foot tall adult elephant casts an 18-foot shadow, how long is the shadow of the 6-foot zookeeper? Use a proportion to set up and solve an equation. Round your answer to the nearest tenth of a foot if necessary.
*Sunday, July 12, 2015 by Dora*

**Algebra**

the approximate distance, S, in feet that an object falls in t seconds when dropped from a height can be found by using the formula S=16t^2. How long will the object have fallen in 8 seconds?
*Saturday, July 11, 2015 by David*

**Algebra?**

The length of the square above is 2x/3+1. What is the perimeter of the square?
*Saturday, July 11, 2015 by Jayson*

**Algebra 2**

Find Sn for d = 7, n = 20, and An = 136
*Saturday, July 11, 2015 by Mr. Tony*

**algebra**

As isosceles triangle has two sides of equal length. If the third side of an isosceles triangle is five inches longer than one of the equal sides, and the perimeter is 26 inches, find the length of each side.
*Friday, July 10, 2015 by gigi*

**Algebra 2**

An object is dropped from a small plane. As the object falls, its distance, d, above the ground after t seconds, is given by the formula d = –16t2 + 1,000. Which inequality can be used to find the interval of time taken by the object to reach the height greater than 300 ...
*Friday, July 10, 2015 by Austin*

**Algebra**

what is the interest rate necessary for an investment to quadruple after 5 years of continuous compound interest? I keep getting r=11%
*Friday, July 10, 2015 by Janice*

**Algebra 2**

Can someone check my work please? I tried my best on all the problems but I still don't understand excluded values and how to simplify rational expressions. Thank you in advance for any help! 1)6x^5/2x^3 6/2 = 3 3x^5/x^3 x^5-x^3 = x^2 3x^2/1 2) (2x+4)+(x^2 +2x) 2x+4: 2(x+2...
*Thursday, July 9, 2015 by Tommy*

**Algebra**

Could someone just double check my work sqrt280x^6/sqrt7x I got 2x^3 sqrt10\sqrtx Also 1/5(30y+40)+2/3(9y-27)=18 I got 7/3
*Thursday, July 9, 2015 by kim*

**Algebra**

At an ordinary rate, a man can row the distance from A to B, about 15 km, in 5 hours less time than it takes him to return. Could he double his rate, his time to B would only be one hour less than his time to A. What is his usual rate in still water? What is the rate of the ...
*Thursday, July 9, 2015 by Anne B.*

**algebra 1**

Please simply using long division: (-72 -4xsq +8xcu -36x) decided by (x-3). Thank you.
*Wednesday, July 8, 2015 by Jack Mortensen*

**Algebra**

I seriously need help on this math problem. I have tried to work it out myself but the answer is not coming out right. Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -8x2 + 3x + 7.
*Wednesday, July 8, 2015 by Angel*

**math (algebra)**

In Professor Tuffguy's mathematics class, 36 students took the final exam. If the average passing grade was 78, the average failing grade was 60, and the class average was 71, how many of these 36 student passed the final?
*Wednesday, July 8, 2015 by Samantha*

**math (algebra)**

x^32-1=(x^16+1)(x^8+1)(x^4+1)(x^2+1)(X+1)(?) Find ? .. How do I do this?
*Wednesday, July 8, 2015 by Samantha*

**math (algebra)**

In a certain circle, the length of a radius is equal to the reciprocal of the length of a diameter. What is the area of this circle?
*Wednesday, July 8, 2015 by Samantha*

**math (algebra)**

How many different numbers stisfy the equation (x-2)^2(x-1)^3(x+1)^4(x+2)^5 = 0 I really need help. Thanks!
*Wednesday, July 8, 2015 by Samantha*

**algebra**

what is the velocity of an object that falls from a 100 foot building after it has traveled 15 feet?
*Wednesday, July 8, 2015 by Jimmy*

**algebra 2**

Bonnie and Bruce have a rectangular swimming pool that is 6 feet wide and 10 feet long. They are going to build a tile border of uniform width around the pool. They have a 105 square feet of tile. How wide should the border be?
*Wednesday, July 8, 2015 by David*

**Algebra (Normal Distribution)**

The weights of 1,000 men in a certain town follow a normal distribution with a mean of 150 pounds and a standard deviation of 15 pounds. From the data, we can conclude that the number of men weighing more than 165 pounds is about _____ , and the number of men weighing less ...
*Wednesday, July 8, 2015 by Farah*

**Intermediate Algebra **

The amount P of pollution varies directly with the population N of people. City A has a population of 468,000 and produces 260,000 tons of pollutants. Find how many tons of pollution we should expect City B to produce, if we know that it's population is 362,000.
*Tuesday, July 7, 2015 by Nomaris*

**Intermediate Algebra**

in 2005, 10.4 out of every 50 employees at a company were women. if there are 43,839 total company employees, estimate the number of women
*Tuesday, July 7, 2015 by Nomaris*

**Algebra**

A Chemist needs 200 liters of 30% acid solution. she has a 20% and 50% acid solution. How much of each must she mix?
*Tuesday, July 7, 2015 by Aleeyah Lacuesta*

**Algebra (Normal Distribution)**

The mean of a normally distributed data set is 12, and the standard deviation is 2. ___% of the data points lies between 8 and 16. Find the percentage
*Tuesday, July 7, 2015 by Farah*