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September 15, 2014

September 15, 2014

**Recent Homework Questions About Algebra**

Post a New Question | Current Questions

**Algebra**

find the number of decibels for for the power of the sound given. Round to the nearest decibel. a rocket engine, 2.4 X 10 -5 watts/cm2
*Friday, February 14, 2014 at 7:08pm*

**Intermediate Algebra**

In 1992, the life expectancy of males in a certain country was 71.1 years. In 1997, it was 73.4 years. Let E represent the life expectancy in year t and let t represent the number of years since 1992. The linear function E(t) that fits the data is E(t)=___?t+__?(Round to the ...
*Friday, February 14, 2014 at 3:47pm*

**Algebra**

you can represent the width of a certain rectangle with the expression x + 2. the length of the rectangle is twice the width. what is the area of the rectangle? A.) 2x+4 B.) 2x^2+8 C.) 2x^2+8x+8 D.) 4x^2+16x+16 I'm not sure on the answer..... Please help Thank you
*Friday, February 14, 2014 at 12:34pm*

**Algebra-help**

what is y=2/7x-4 written in standard form? A. 2x+7y=-28 B. 2x-7y=28 ****** C. -2x-7y=-28 D. -2x+7y=28 My answer is B???
*Friday, February 14, 2014 at 10:31am*

**algebra**

Teri, nick, and Alex had $865 altogether. Teri spent 2/5 of her money. Nick spent $40, and Alex spent twice as much as Alex. If the three friends had the same amount of money left, how much money did Alex have in the beginning?
*Thursday, February 13, 2014 at 8:39pm*

**Algebra**

In 1991, the life expectancy of males in a certain country was 67.2 years. In 1995, it was 71.1 years. Let E represent the life expectancy in year t and let t represent the number of years since 1990. The linear function E(t) that fits the data is E(t) =?t + ? (Round to the ...
*Thursday, February 13, 2014 at 8:34pm*

**Algebra**

Find an equation of the line having the the given slope and containing the given point. M=4/5,(7,-4) The equation of the line is y=?
*Thursday, February 13, 2014 at 8:28pm*

**Algebra**

A cylinder has a radius of 5x+2 and a height of 2x+8. Which polynomial in standard form best describes the total volume of the cylinder?
*Thursday, February 13, 2014 at 6:08pm*

**algebra**

Please help...The area of a rectangular room is given by the trinomial x^2+4x-12. What are the possible dimensions of the rectangle? Use factoring.
*Thursday, February 13, 2014 at 5:43pm*

**Algebra**

A community group is building a playground on a rectangular lot of land. The lot measures 6x by 9x and they want to cut out an area for a circular jungle gym with a radius of 4x. How much of the land will be left over after the jungle gym is built.
*Thursday, February 13, 2014 at 5:25pm*

**Algebra**

Solve for x: h=(k/4)(x-3L) Solve for B: v-6Bxk=7B Solve for S: z+(1/7)sk=(1/6)yk^2 Solve for x: 3F=10hx+10hv+10xv
*Thursday, February 13, 2014 at 3:33pm*

**Algebra 2**

Which circle has the largest circumference? x2 + y2 = 8 (x – 3)2 + y2 = 10 (x + 3)2 + (y + 2)2 = 4 x2 + (y – 2)2 = radical 81
*Thursday, February 13, 2014 at 3:19pm*

**Algebra 1**

How do you write the equation of a line if you have two points? Please use detail and give step by step instructions: trying to study for a test and I don't understand this concept.
*Thursday, February 13, 2014 at 3:13pm*

**algebra**

A baseball player hits a ball toward the outfield. The height h of the ball in feet is modeled by h(t) = -16t2 + 22t + 3, where t is the time in seconds. If no one catches the ball, how long will it stay in the air? (Round to the nearest tenth of a second and enter only the ...
*Thursday, February 13, 2014 at 1:53pm*

**algebra**

Find a slope of a snowboarding beginner hill that decreases 24 feet vertically for every 30 foot horizontal increase
*Thursday, February 13, 2014 at 12:37pm*

**Algebra (Integer Problem)**

The sum of three positive numbers is 33. The second number is 3 greater than the first and the third is 4 times the first. Find the three numbers.
*Thursday, February 13, 2014 at 4:52am*

**Algebra (Age Problem)**

A man is 6 times as old as his son. In 4 years he will be 4 times as old as his son. How old is the father now?
*Thursday, February 13, 2014 at 4:46am*

**Algebra 2**

Ordinary corn syrup contains dextrose sugar. A process called enzyme conversion changes it into a syrup that is 42% fructose. This new syrup can be further treated with fractionation columns to make a syrup that is 95% fructose (high fructose corn syrup). Manufacturers of soft...
*Thursday, February 13, 2014 at 1:59am*

**algebra help please ASAP**

Express in simplest form. 1. -4/x^3 + 9/x + 2/x^2 2. 7/10x^2 + 1/2x^3 + 11/5x 3. a + 4/3a + 2a - 1/5a^2
*Wednesday, February 12, 2014 at 11:11pm*

**Algebra - Rational Exponents**

Can someone explain the rules for raising a power to a power? Please explain and give some examples. I would appreciate it if you can answer this as soon as possible.
*Wednesday, February 12, 2014 at 10:45pm*

**Algebra**

In 1991, the life expectancy of males in a certain country was 70.8 years. In 1995, it was 74.6 years. Let E represent the life expectancy in year t and let t represent the number of years since 1991.. The linear function E(t) that fits the data is E(t)= (Round to the nearest ...
*Wednesday, February 12, 2014 at 9:31pm*

**Algebra**

Find an equation of the line having the given slope and containing the given point. M=4/5,(3,-1) The equation of the line is y=
*Wednesday, February 12, 2014 at 9:24pm*

**Algebra**

You are offered the option of choosing a yearly salary of $45,000 or continue working on commission. a. Using the equation from problem #1, how many appliances do you have to sell per year in order to match this salary? (Hint: $450 is the base pay per month, not year. Multiply...
*Wednesday, February 12, 2014 at 8:54pm*

**Algebra**

The cost of producing cell phones is represented as C=mx+b, where m is the marginal cost, x is the number of phones produced, b is the fixed cost, and C is the final cost. a. If the fixed cost is $75 and the marginal cost is $8, write the cost equation. b. In March, the total ...
*Wednesday, February 12, 2014 at 8:53pm*

**Algebra**

Sarah has two part-time jobs and needs to earn at least $300 total per week. Job A pays her $10 an hour and job B pays $7.50 an hour. Write an inequality that represents this scenario. Name and label your variables, such as Job A= x.
*Wednesday, February 12, 2014 at 8:51pm*

**algebra**

The perimeter of a rectangular field is 300 meters. This field is to be fenced along three sides only. The fencing along its two lengths and one width is to be done at $50 per meter. If the total cost of fencing is $12,000, what are the field’s dimensions?
*Wednesday, February 12, 2014 at 7:51pm*

**Algebra 2**

How would you describe the pattern of this sequence? 2/3, 4/4, 6/5, 8/6, 10/7 The formula is 2n/n+2 where n is 1, 2, 3, 4, 5
*Wednesday, February 12, 2014 at 7:34pm*

**algebra**

x+6+9 - x - 18 x-3- - x
*Wednesday, February 12, 2014 at 6:24pm*

**Intermediate Algebra**

The fax mailer bought a fax machine for $600. The fax machine depreciates at a rate of $20 a month. Find a function that can be used to determine the value of the fax machine t months after purchase. Complete the model below F(t)=__?
*Wednesday, February 12, 2014 at 5:49pm*

**algebra**

chuck and dana agree to meet in florida for the weekend. Chuck travel 152 miles in the same time that Dana travels 132 miles. If chuck rate of travel is 5 mph more than Dana and they travel the same length of time, at what speed does chuck travel
*Wednesday, February 12, 2014 at 5:47pm*

**algebra**

A newspaper carrier has $4.00 in change. He has two more quarters than dimes but five times as many nickels as quarters. How many of coins of each type does he have. This is what I got so far and then I get lost. dimes = x quarters = x+2 nickels = 5(x+2) 10x+25(x+2)+5*4(x+2)= ...
*Wednesday, February 12, 2014 at 5:44pm*

**Intermediate Algebra**

Write an equation of the line containing the given point and perpendicular to the given line. (0,4);5x+9y=4 The equation of the line is y=__? (Simplify your answer. Use integers or fractions for any number in the expression)
*Wednesday, February 12, 2014 at 3:45pm*

**algebra**

monique ran one mile in 6 minutes.her average speed was how many miles per hour
*Wednesday, February 12, 2014 at 2:11pm*

**algebra**

Your monthly commission as an appliance sales person is represented by the equation, S = 50x+450, where 50 is the rate paid for each appliance sold, x is the number of appliances sold, 450 is the base pay per month, and S is the salary. Complete the following table to ...
*Wednesday, February 12, 2014 at 1:53pm*

**algebra**

A farmer needs to fertilize a large rectangular field. He knows the width of the field is
*Wednesday, February 12, 2014 at 8:51am*

**Algebra**

The Smith family made an $800 down payment and pays $75 a month for new furniture. At the same time the Cooper family made a $500 down payment and pays $95 a month for their new furniture. How many months until the amounts they have paid will be equal? Please help with answer!
*Tuesday, February 11, 2014 at 11:58pm*

**Algebra**

Factor the following polynomial. 28x^3+59x^2+13x
*Tuesday, February 11, 2014 at 9:13pm*

**algebra**

solve by graph 51 less than or equal to 3 - 6y
*Tuesday, February 11, 2014 at 9:09pm*

**Algebra**

How do I solve and the answer for z divided by 3/4=4 1/4?
*Tuesday, February 11, 2014 at 9:01pm*

**Algebra**

In 1991, the life expectancy of males in a certain country was 72.6 years. In 1996, it was 74.7 years. Let E represent the life expectancy in year t and represent the number of years since 1991. The linear function E(t) that fits that data is, E(t)=
*Tuesday, February 11, 2014 at 8:16pm*

**Algebra**

Find an equation of the line having the given slope and containing the given point. M=6/7, (5,-2) The equation of the line is y =
*Tuesday, February 11, 2014 at 8:10pm*

**Algebra**

Find an equation of the line having the given slope and containing the given point. Express your answer in the form y=b or y=mx+b M=0, (0,-5) The equation of the line is y=
*Tuesday, February 11, 2014 at 8:08pm*

**algebra & trigonometry**

The area of a rectangle is 28 square inches. The length is 8 more than thrice the width. Find the length and the width. Thanks
*Tuesday, February 11, 2014 at 7:46pm*

**algebra & trigonometry**

The area of a rectangle is 12 square inches. The length is 5 more than twice the width. Find the length and the width. Thanks
*Tuesday, February 11, 2014 at 7:46pm*

**algebra & trigonometry**

The sum of two numbers is 210. If one number is the square of the other, find the set of numbers. Thanks
*Tuesday, February 11, 2014 at 7:45pm*

**More Algebra - Dividing Radicals!**

A hotel wants to put a fence around a circular spa. The radius of the spa is 5/(√2-1)feet. If the fence is built along the immediate edge of the spa, what is the perimeter of the fence? (Recall that the perimeter of a circle is 2πr, where r is the radius of the ...
*Tuesday, February 11, 2014 at 7:11pm*

**Algebra - Dividing Radicals**

A landowner wishes to construct a fence around a small section of her property. The fence is rectangular and is (3√5)/√7 meters wide and (2√3)/√5 meters long. What is the exact perimeter of the fence? (Recall that the perimeter is the sum of each ...
*Tuesday, February 11, 2014 at 6:32pm*

**Algebra**

A manufacturer produces a 4-cup and 8-cup coffee maker. The 4-cup maker takes 6 hours to produce and the 8-cup takes 9 hours. The manufacturer has at most 500 hours of labor per week. a. Write an inequality to represent the number of each type of coffee makers they can produce...
*Tuesday, February 11, 2014 at 6:28pm*

**Algebra**

Sarah has two part-time jobs and needs to earn at least $300 total per week. Job A pays her $10 an hour and job B pays $7.50 an hour. Write an inequality that represents this scenario. Name and label your variables, such as Job A= x.
*Tuesday, February 11, 2014 at 6:26pm*

**Algebra**

The cost for an electrician is $135 for 3 hours. A 7 hour repair costs $315. Showing your calculations, determine the price of a 12 hour repair.
*Tuesday, February 11, 2014 at 6:26pm*

**Algebra**

On a particular April day, the temperature at 8 am was 40°F. By 4 pm the temperature was 64°F. What was the hourly rate of temperature change?
*Tuesday, February 11, 2014 at 6:25pm*

**Algebra**

Three years after purchase, a car is estimated to be worth $24,000. At five years, its value is $19,000. If the car is depreciating in a linear manner, write an equation that represents the depreciation of the car. Answer the following questions: a. How much is the car ...
*Tuesday, February 11, 2014 at 6:24pm*

**Algebra**

The cost of producing cell phones is represented as C=mx+b, where m is the marginal cost, x is the number of phones produced, b is the fixed cost, and C is the final cost. a. If the fixed cost is $75 and the marginal cost is $8, write the cost equation. b. In March, the total ...
*Tuesday, February 11, 2014 at 6:23pm*

**Algebra**

You are offered the option of choosing a yearly salary of $45,000 or continue working on commission. a. Using the equation from problem #1, how many appliances do you have to sell per year in order to match this salary? (Hint: $450 is the base pay per month, not year. Multiply...
*Tuesday, February 11, 2014 at 6:21pm*

**algebra and trigonometry**

At a college function, a total of 180 tickets were sold. The tickets were priced at $5, $10, and $15, and the money collected that day was $1,900. The sum of the numbers of $5 and $15 tickets sold was twice the number of $10 tickets sold. Find the number of each type of ticket...
*Tuesday, February 11, 2014 at 11:59am*

**algebra 1**

when three times the distance to he finish line is increased by 5km, the total kilometers covered in the race will be between 50 and 89 km
*Tuesday, February 11, 2014 at 9:15am*

**Algebra (Age Problem)**

Five years ago Rico's age was half of the age he will be in eight years. How old is he now?
*Tuesday, February 11, 2014 at 8:34am*

**algebra**

Peter is throwing a surprise party for his friend Tammy. He has a budget of $350. If the restaurant charges $20 per person for drinks and food and a cleanup fee of $35, what is the maximum number of people that he can invite to stay within budget? Write and solve an inequality...
*Monday, February 10, 2014 at 11:28pm*

**Algebra **

George built a rectangular pen for his rabbit such that the length is 1 ft more than four times the width. If the perimeter is 292 ft, what are the dimensions of the pen?
*Monday, February 10, 2014 at 10:42pm*

**math algebra**

Find the equation in slope-intercept form of the line having m = -2 and b = 4.
*Monday, February 10, 2014 at 10:33pm*

**algebra based physics**

A proton is held at a fixed position. An electron is placed 0.85m away and released. Find the electron's speed when it's 9.0mm from the proton.
*Monday, February 10, 2014 at 10:21pm*

**algebra based physics**

Two identical 20g particles each carry 4.0μC of charge. One is held fixed, and the other is placed 1.0 mm away and released. Find the speed of the moving charge when it's 1.0 cm from the fixed charge. Find the speed of the moving charge when it's 1.0 km from the ...
*Monday, February 10, 2014 at 10:20pm*

**algebra based physics**

Three point charges of 2.0 μ C, 4.0 μ C, and 6.0 μ C form an equilateral triangle with each side 2.0cm. Find the electric potential energy of this distribution.
*Monday, February 10, 2014 at 10:15pm*

**algebra based physics**

Two protons in a nucleus are separated by 8.0×10−15m . What's the potential energy of the pair?
*Monday, February 10, 2014 at 10:13pm*

**algebra based physics**

An electron in an oscilloscope tube is traveling horizontally with a speed of 4.4×106m/s . It passes through a 2.1cm long region with an electric field pointing upward with a magnitude of 1500N/C. what is the magnitude of the electron’s velocity when it emerges from...
*Monday, February 10, 2014 at 10:13pm*

**algebra based physics**

Electric bees. As they fly through the air, honeybees can pick up a small amount of electric charge. Suppose a 0.12-g bee acquires a charge of –65pC. How many excess electrons has the bee acquired? Find the magnitude of the electric force on the bee in the electric field ...
*Monday, February 10, 2014 at 9:59pm*

**algebra**

1Write an equation of the line that passes through (-1, 2) having a slope of 0
*Monday, February 10, 2014 at 9:48pm*

**algebra**

Find an equation in standard form of the line passing through the points (8, -5) and (-6, 2).
*Monday, February 10, 2014 at 9:47pm*

**algebra**

Find an equation in slope-intercept form of the line passing through (0, 1) which is parallel to the line y = 6x – 23
*Monday, February 10, 2014 at 9:46pm*

**algebra**

Find an equation in slope-intercept form of the line passing through (0, 1) which is parallel to the line y = 6x – 23
*Monday, February 10, 2014 at 9:46pm*

**algebra help please**

add and simplify 1. a^2/2 + 3a^2/8 2. 4c/15 + 8c/25 i need help can someone explain please
*Monday, February 10, 2014 at 9:46pm*

**algebra**

is 10/11 rational or irrational ?
*Monday, February 10, 2014 at 9:25pm*

**algebra 2**

write the general form of a sine curve equation.
*Monday, February 10, 2014 at 8:44pm*

**Algebra 1/ Pre **

Solve? 5x - 3(7x + 5) = 1
*Monday, February 10, 2014 at 6:58pm*

**algebra **

Hoe can I solve this by using elimination method.?? 5y+2x=5x+1 3x-2y=3+3y
*Monday, February 10, 2014 at 6:47pm*

**Algebra 1**

1.Bananas are usually 49 cents a pound. This week they are on sale for 29 cents a pound. What is the percent off? 2.Lydia paid $32 for a book that was originally $43. What is the percent discount. I got 1.59% 2.74%
*Monday, February 10, 2014 at 5:08pm*

**algebra 2**

tell how to find the cotangent of an angle when given the tangent of the angle. give an example
*Monday, February 10, 2014 at 4:46pm*

**Algebra**

Tim works part-time at a retail store. His salary varies directly by the number of hours worked. Last week he earned $99.45 for 13 hours of work. This week he earned $160.65. a. Write and solve an equation that represents this scenario. b. How many hours did he work?
*Monday, February 10, 2014 at 4:10pm*

**Algebra**

The cost of producing cell phones is represented as C=mx+b, where m is the marginal cost, x is the number of phones produced, b is the fixed cost, and C is the final cost. a. If the fixed cost is $75 and the marginal cost is $8, write the cost equation. b. In March, the total ...
*Monday, February 10, 2014 at 4:09pm*

**Algebra**

Best Car rental agency charges a flat rate of $40 and 10¢ per mile to rent a standard car. A+ Rentals charges a flat rate of $35 and 20¢ per mile for the same car. a. Write an equation to represent the total cost (y) and number of miles (x) of renting from each ...
*Monday, February 10, 2014 at 4:09pm*

**Algebra**

Your monthly commission as an appliance sales person is represented by the equation, S = 50x+450, where 50 is the rate paid for each appliance sold, x is the number of appliances sold, 450 is the base pay per month, and S is the salary. Complete the following table to ...
*Monday, February 10, 2014 at 4:07pm*

**Division Properties of Exponents~Algebra**

The only reason I'm asking is because the last 3 answers were answer B, and I was thinking I got something wrong.. 1. Which of the following is equivalent to x5y2/xy2 when x ≠ 0 and y ≠ 0? A. x6y5 B. x5y C. x4y D. x4 ********* 2. Which expression is NOT equal ...
*Monday, February 10, 2014 at 12:26pm*

**algebra 2**

Write in standard form (2b^2-b)+(b^2+4b-4) PLEASE EXPLAIN ON HOW TO DO IT I WANT TO LEARN
*Monday, February 10, 2014 at 11:16am*

**algebra 2**

write in standard form. (2b^2b)+(b^2+4b-4)
*Monday, February 10, 2014 at 11:15am*

**algebra 1 help please ASAP**

Divide and simplify. 1. 2y^2 - 7y + 3/2y^2 + 3y - 2 divided by 6y^2 - 5y + 1/3y^2 + 5y -2 2. x^2 + 13x + 12/x + 2 divided by (x + 1) Please explain! Thanks!
*Sunday, February 9, 2014 at 11:15pm*

**Algebra 1 (Reiny!)**

A piece of 8.5-by-11-inch cardboard has identical squares cut from its corners. It is then folded into a box with no lid. The volume of the box in cubic inches is 4c^3 - 39c^2 + 93.5c, where c is the side length of the missing squares in inches. a. What is the volume of the ...
*Sunday, February 9, 2014 at 8:59pm*

**algebra**

Jose has 6 more dimes than quarters. He has $1.65 total. How many coins of each type does he have?
*Sunday, February 9, 2014 at 8:43pm*

**algebra & trigonometry**

The profit of an organization is calculated by the function P(x) = x2 – 4000x + 7800000, where x is the number of units sold. If the net profit is 3800000, find the number of items sold. Thanks
*Sunday, February 9, 2014 at 8:40pm*

**algebra & trigonometry**

At a grocery store, the number of customers arriving per hour is shown by the function f(x) = 2x + 1. Find the number of customers that arrived in the 6th hour. Thanks
*Sunday, February 9, 2014 at 8:38pm*

**algebra & trigonometry**

Jerry wants to purchase some items whose cost function is , where x is the number of items. If Jerry spends between $50 and $80, find the minimum and maximum number of items that he can purchase. Thanks
*Sunday, February 9, 2014 at 8:36pm*

**intermediate algebra**

A woman has a total of $9,000 to invest. She invests part of the money in an account that pays 5% per year and the rest in an account that pays 10% per year. If the interest earned in the first year is $650, how much did she invest in each account?
*Sunday, February 9, 2014 at 5:59pm*

**algebra**

x^3+4a+5a^2x^6 ascending order
*Sunday, February 9, 2014 at 5:46pm*

**algebra**

seventeen greater than a number is 151 find the number the number is
*Sunday, February 9, 2014 at 5:31pm*

**algebra & trigonometry**

Jerry wants to purchase some items whose cost function is , where x is the number of items. If Jerry spends between $50 and $80, find the minimum and maximum number of items that he can purchase.
*Sunday, February 9, 2014 at 5:28pm*

**algebra**

the current in an electrical conductor varies inversely as the resistance of the conductor. If the current is 12 ampere when the resistance is 240 ohms, what is the current when the resistance is 540 ohms
*Sunday, February 9, 2014 at 5:23pm*

**algebra & trigonometry**

A person wants to purchase two types of items, A and B, from a shop. She has $200 to spend, and she has to purchase at least 10 items. If the price of one unit of each A and B is $10 and $30, respectively, represent this problem graphically. Thanks
*Sunday, February 9, 2014 at 5:23pm*

**Algebra**

Find the slope or pitch of the roof. I need both the slope and pitch. 13ft | |__13.8ft The pitch of the roof is__% (round to the nearest percent as needed)
*Sunday, February 9, 2014 at 5:16pm*

**Algebra**

The graph shows data from a recent satellite internet connection. The cost was 90 cents at 10 minutes, and 180 at 20 minutes. The connection service billed at a rate of how many cents per minute?
*Sunday, February 9, 2014 at 4:51pm*

**Algebra 2**

an equilateral triangle has an inscribed circle with a radius of sqrt b+27 ft. if the area of the triangle is 48*sqrt b+6 feet squared. what are the two possible value of perimeter for this triangle?
*Sunday, February 9, 2014 at 4:37pm*

**Algebra 2**

Can someone please explain how to do this problem? Woodrow wins a tic-tac-toe game 65% of the time when he chooses the first square and 32% of the time when his opponent chooses the first square. The player who plays first is chosen by a coin toss. What is the probability that...
*Sunday, February 9, 2014 at 3:43pm*

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