Wednesday

August 20, 2014

August 20, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**Math 221**

How can I explain how I got the answer. I received the help, but no explanation to how the answer was simplified. 1=1(-7) +b b = 8 In other words, you need to explain what you did to simplify 1=1(-7) + b. This is also true for the perpendicular equation process. 2=2(4) +b ...
*Saturday, July 26, 2014 at 11:29am*

**math**

A total of 800m of fencing material is used to enclose a rectangular field and to divide the field into four partitions by fences parallel to the width of the field. Find the dimensions of the largest are of the field that can be fenced.
*Saturday, July 26, 2014 at 9:45am*

**math**

A company charges $200 for each leather bag on order of 150 or less. The cost of each bag is reduced by $1 for each order in excess of 150 pieces. How many bags on order would result in maximum revenue? What is the maximum revenue?
*Saturday, July 26, 2014 at 9:35am*

**Math**

A theater seats 200 people and charges $10 for a ticket. At this price, all the tickets can be sold. A survey indicates that if the ticket price is increased by a peso, the number of tickets sold will decrease by 10. What price will yield the greatest revenue?
*Saturday, July 26, 2014 at 9:16am*

**math**

Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -9x2 + 9x + 5. (a){–1.80, 1.80} (b){-9, 9} (c){–1.00, –0.56} (d){–0.40, 1.40}
*Saturday, July 26, 2014 at 7:01am*

**math**

Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -5x2 + 7x + 4. a.{–0.44, 1.84} b.{-5, 7} c.{–1.40, –0.80} d.{–1.25, 1.75} For some reason, I am thinking it is -5,7
*Saturday, July 26, 2014 at 5:04am*

**statistic**

Lilly collects data on a sample of 40 high school students to evaluate whether the proportion of female high school students who take advanced math courses in high school varies depending upon whether they have been raised primarily by their father or by both their mother and ...
*Saturday, July 26, 2014 at 4:13am*

**Math 221**

where is the origin located in this equation? 1). The first equation that I am using for my discussion is: y=x+4 and the parallel must past through this given point (-7, 1) y=x=-4 is the equation and (-7, 1) is the ordered pair y=x+4 Since I want the new line parallel, I need ...
*Friday, July 25, 2014 at 6:24pm*

**MATH WORD PROBLEMS**

PART A Camilla has a rectangular print that is 34 inches wide and 26 inches tall. She wants to center it on the wall above the television in her living room. The television is placed i front of a rectangular wall in the living room that is 18 1/2 feet long and 9 3/4 feet tall...
*Friday, July 25, 2014 at 6:20pm*

**math**

how much would you have to pay each month to pay off a $32,000 remaining mortgage/30 years if you want to pay off in fewer than 5 years?
*Friday, July 25, 2014 at 6:14pm*

**MAth**

need help with this 5y(2y - 3) + (2y - 3)= 10y - 15y + 2y - 3 Am I on the right track?
*Friday, July 25, 2014 at 6:10pm*

**math**

One shelf at Cover-to-Cover Bookstore contains copies of several books on the best-seller list. Half of the books on the shelf are copies of the Number 1 best- seller. Of the remainder, 1/4 are copies of the Number 3 book. The rest are copies of the Number 2 book. If there are...
*Friday, July 25, 2014 at 2:22pm*

**math**

At 5 p.m two ships started sailing toward each other from ports which were 300 miles apart at average rates of 20 and 25 miles per hour. At what time were the ships still 30 miles apart?
*Friday, July 25, 2014 at 2:17pm*

**Math 221**

I need to check and see if this is correct? 1). The first equation that I am using for my discussion is: y=x+4 and the parallel must past through this given point (-7, 1) y=x=-4 is the equation and (-7, 1) is the ordered pair y=x+4 Since I want the new line parallel, I need to...
*Friday, July 25, 2014 at 1:36pm*

**Math 221**

I am trying to figure out if this equation is correct? My second equation that I am using is: y=-1/2x+1, and the perpendicular must pass through this given point (4, 2). y-y=m(x-y) y-2=2(x-4) perpendicular lines have to have slopes, so y-2=2x-8 y-2+2=2x-8+2 reciprocal y=2x-6 ...
*Friday, July 25, 2014 at 1:34pm*

**Math 221**

These are the questions that's used for my classwork and I need help with it. There is no typo. y=x+4 and the parallel must past through this given point (-7, 1) y=-1/2x+1, and the perpendicular must pass through this given point (4, 2)
*Friday, July 25, 2014 at 1:29pm*

**math**

Five points lie in the same plane with no three points on the same line. A circle can be drawn through any three of the five points. What is the total number of different circle that can be drawn such that each circle passes through three of the five points?
*Friday, July 25, 2014 at 1:27pm*

**Math terminal zeroes**

If a number ends in zeroes, the zeroes are called terminal zeroes. For example, 520,000 has four terminal zeroes, but 502,000 has just 3. Let X equal the product of all natural numbers from 1 to 20. N = 1 * 2 * 3... *20. How many terminal zeroes will N have when it is written ...
*Friday, July 25, 2014 at 12:59pm*

**Math**

a building is 16m from a television tower. From the top of the building, the angle of depression from the base 43 degrees, and the angle of elevation to the top of the tower is 24 degrees. Find the height of the tower?
*Friday, July 25, 2014 at 8:24am*

**Math 105**

To estimate the proportion p of defective light bulbs produced in a factory, a sample of 180 bulbs were tested. In this sample 27 were defective. We will compute a 95 percent confidence interval for p. Compute the margin of error e in esimating p at 95 percent level of ...
*Friday, July 25, 2014 at 4:06am*

**math**

A compact disc is placed in a player that randomly selects and plays songs from the disc.The compact disc contains 3 ballads, 4 instrumental pieces,X dance tracks and no other pieces.If the probability that the first song played will be a ballad is 1/4,what is the value of X?
*Thursday, July 24, 2014 at 11:56pm*

**math**

An equilateral triangle and a regular hexagon share a common side. The perimeter of the triangle is 20 cm. What is the perimeter of the hexagon?
*Thursday, July 24, 2014 at 10:38pm*

**Math 221*revised***

Please help me figure these problems out y=x+4 and the parallel must past through this given point (-7, 1) y=-1/2x+1, and the perpendicular must pass through this given point (4, 2)
*Thursday, July 24, 2014 at 10:34pm*

**Math 221**

I need help trying to figure this out: y+x+4 and the parallel must past through this given point (-7, 1)
*Thursday, July 24, 2014 at 10:22pm*

**math **

2.If the largest of 7 consecutive integers is 25 what is the average of the 7 integers? A.24 B.22 C.21 D.20 E.16 I got E, this is my work: 7x+21/7=25 7x+21=175 -21 -21 7x=154 x=22
*Thursday, July 24, 2014 at 10:18pm*

**math**

Only three canoes are offered, the Iroquois, Chippewa, and Winnebago, which cost $1,100,$1,400, and $2,100, respectively. Each canoe also comes as a kit and costs $450, $550, and $800 respectively. Custom paddles are also available and cost $45 and $75, for medium and large ...
*Thursday, July 24, 2014 at 9:42pm*

**business math**

how do you check to see if your dollar markups are correct
*Thursday, July 24, 2014 at 9:31pm*

**Math**

1) There were a total of 840 guests at a wedding dinner. 60% of them were adults, and the rest were children. Some boys left before the dessert was served. As a result, the percentage of adults increased to 70%. How many boys left before the dessert was served?
*Thursday, July 24, 2014 at 8:39pm*

**MATH**

1) A certain radio costs a merchant $72, which includes overhead and selling expenses. At what price must he sell it if he is to make a profit of 20% on the selling price? a) $86.40 b) $90 c) $92 d)$144 e)none of these answers 2) Daniel gave 4/5 of his stickers to Javier. ...
*Thursday, July 24, 2014 at 8:33pm*

**Math**

1) 60 meters of fencing are needed to fence in a square lot. What is the area of the lot? a) 3600 m^2 b) 900 m^2 c) 225 m^2 d) 15 m^2 2) A can do a piece of work in r days and B, who works faster, can do the same work in s days. Which of the following expressions, if any, ...
*Thursday, July 24, 2014 at 8:25pm*

**Math: Zeroes**

How many terminal zeroes will 1 * 2 *3... *50 have when it is written in standard form?
*Thursday, July 24, 2014 at 7:49pm*

**Math**

A model airplane is shot up from a platform 1 foot above the ground with an initial upward velocity of 56 feet per second. The height of the airplane above ground after t seconds is given by the equation h=-16t^+56t+1, where h is the height of the airplane in feet and t is the...
*Thursday, July 24, 2014 at 6:35pm*

**math**

Janelle has $20 and is saving $6 per week. April has $150 and is spending $4 per week. When will they both have have the same amount of money? please show work,
*Thursday, July 24, 2014 at 6:33pm*

**Math**

Solve the following quadratic-linear system of equations. y=-x^2-x-6 y=2x-2 A. (3, 6) and (–1, 2) B. (4, 6) and (–1, –4) C. (3, –6) and (2, 4) D. (–4, 3)
*Thursday, July 24, 2014 at 6:22pm*

**math**

AFTER JENNY SPENT 1 / 3 OF HER SAVINGS ON A School bag, she had Rs 780 left .find jenny's SAVINGS AT FIRST.
*Thursday, July 24, 2014 at 2:52pm*

**math**

The difference between one half of a number and one fifth of it is 561. Find the number.
*Thursday, July 24, 2014 at 10:36am*

**math**

2 triangles of the same shape are always A) similar B) equilateral C) congruent D) symmetrical E) equal
*Thursday, July 24, 2014 at 10:35am*

**math**

a= 1/a, then a squared=?
*Thursday, July 24, 2014 at 10:34am*

**math**

The lengths of the diameters of two concentric circles are 6 and 8. What is the distance between the circles?
*Thursday, July 24, 2014 at 10:34am*

**math**

The cost of mailing a package is c cents for the first b ounces and d cents for each additional ounce. find the cost, in cents, for mailing a package weighing f ounces if f is more than b
*Thursday, July 24, 2014 at 10:33am*

**math**

Alex is painting a house. He uses 1/3 of the paint he bought on the dining room. He uses twice as much as the living room as on the kitchen, when he uses 1-1/2 gallons. He has 1-1/2 gallons of paint left. How much paint did Alex buy?
*Thursday, July 24, 2014 at 10:05am*

**math**

In the diagram, the circle will be dilated by a scale factor of 3 about the origin. The points C, A, and B map to C', A', and B' after the dilation. What is the length of ? Use the distance formula to help you decide.
*Thursday, July 24, 2014 at 9:26am*

**math**

The figure shows 2 similar squares, A and B which overlap each other. The ratio of the shaded area to the total area of square B is 3:5. The ratio of the shaded area to the total area of square A is 9:17. What is the ratio of the shaded area to the total unshaded areas of the ...
*Wednesday, July 23, 2014 at 9:50pm*

**Math**

1) If a car travels 357 miles and uses 21 gallons of gas, how many miles does it average per gallon of gas? 2) Alex is painting a house. He uses 1/3 of the paint he bought on the dining room. He uses twice as much on the living room as on the kitchen, where he uses 1 1/2 ...
*Wednesday, July 23, 2014 at 8:38pm*

**MATH**

1) A man has 2 pennies, 3 nickels, 1 dime, and 2 quarters. How many different sums of money can he make using one or more of these 8 coins? a) 8 b) 12 c) 47 d) 77 2) A train left Albany for Buffalo, a distance of 290 miles, at 10:10 am. The train was scheduled to reach Buffalo...
*Wednesday, July 23, 2014 at 8:34pm*

**Math**

1) If Keith drove 259 miles of a 500-mile trip and his wife drove the rest of the way, what percent of the trip did his wife drive? a) 25.9% b) 48.2% c) 49.8% d) 51.8% e) 74.1% 2) If 150% of J is equal to half of K, and K is not equal to 0, then J/K = a) 1/5 b) 1/3 c) 1/2 d) 2...
*Wednesday, July 23, 2014 at 8:27pm*

**MATH**

1) If A is 125% of B, then B is what percent of A? A) 60% B) 75% C) 80% D) 88% E) 90% 2) In an opinion poll of 50 men and 40 women, 70% of the men and 25% of the women said that they preferred fiction to nonfiction books. What percent of the number of people polled preferred ...
*Wednesday, July 23, 2014 at 8:15pm*

**math**

6. If each of eight biology classrooms is in use for 5 hours and 15 minutes per day, and total of 84 student experiments are done, how long does each experiment take on average? A.20 minutes B.30 minutes C. 40 minutes D.50 minutes E.1 hour please show work.
*Wednesday, July 23, 2014 at 7:33pm*

**math**

A company wants to send out a mailer. A mailer be sent only if it has an envelope and a stamp. For the number of mailers printed, the company has only 1/2 the number of envelopes needed. Of those mailers for which there are envelopes, the company has only 1/3 the number of ...
*Wednesday, July 23, 2014 at 7:25pm*

**math**

9.If 1/4 the recommended daily requirement of vitamin P is 2 ounces, what is the total recommended daily requirement of vitamin P? please show work.
*Wednesday, July 23, 2014 at 7:19pm*

**math**

out of every 220 packages of coffee 30 are in twelve oz bags, 60 are in 16 oz. bags and 110 are in 5 lb bags. 1100 packages were labeled in 8 minutes. how many packages are there of each?
*Wednesday, July 23, 2014 at 6:15pm*

**Math**

A ferris wheel has a diameter of 10 m and takes 24 sec to make one revolution. The lowest point on the wheel is 1 m above the ground. (4 marks) a. Sketch a graph to show how a rider's height above the ground varies with time as the ferris wheel makes a rotation. Assume the...
*Wednesday, July 23, 2014 at 5:23pm*

**math**

Alex is painting a house. He uses 1/3 of the paint he bought on the dining room. He uses twice as much on the living room as on the kitchen, where he uses 1 1/2 gallons. He has 1 1/2 gallons of paint left. How much paint did Alex buy?
*Wednesday, July 23, 2014 at 2:52pm*

**math**

The area of a rectangle is 2x^2+5x^2-x-6 cm. write a polynomial that represents its width if its length is 2x^2+ x-3.
*Wednesday, July 23, 2014 at 6:46am*

**math**

An A.P. is given by k,2k/3,k/3, 0,... Find the 6th term.
*Tuesday, July 22, 2014 at 9:15pm*

**Math**

1. Of the bundles delivered daily to the store, 1/3 consists of the morning edition of The Daily Sun. Another 2 bundles are made up of the afternoon edition of the same paper. Of the remaining bundles, 1/2 is regional, one is a local newspaper and one is from another state. ...
*Tuesday, July 22, 2014 at 8:23pm*

**MATH**

1) The distance between Chicago and Cleveland is 354 miles. If a person leaves Chicago at 9:50 am. Central Time and arrives in Cleveland at 5:30 pm the same day Eastern Time, at what average speed does he travel, correct to the nearest mile a) 46 mph b) 50 mph c) 53 mph d) 55 ...
*Tuesday, July 22, 2014 at 8:20pm*

**Math**

1. What is the largest integer that is a factor of all three of the following numbers: 2160, 1344, 1440? a) 6 b) 8 c) 12 d)16 e) none of these 2. The annual income of a family is budgeted as follows: 1/10 for clothing, 1/3 for food, and 1/5 for rent. This leaves $1320 for ...
*Tuesday, July 22, 2014 at 8:12pm*

**Math**

#1) A gold bracelet that sells for $320 is on sale for 40% off. One way to find the amount by which the regular price is reduced is to multiply $320 by a) 3/10 b) 2/5 c) 3/5 d) 5/8 #2) A triangle can have sides whose lengths are 9 cm, 16 cm, and a) 7 cm b) 8 cm c) 25 cm d) 26 cm
*Tuesday, July 22, 2014 at 8:07pm*

**math**

Find the first three terms in ascending power of 'x' of the binomial expression of (3+bx)^5 where b is a non zero constant.
*Tuesday, July 22, 2014 at 7:17pm*

**math**

Ex 12: The smallest of five consecutive integers is represent by y-3. What is the largest of these integers, in terms of y? please explain and show work.
*Tuesday, July 22, 2014 at 6:55pm*

**Math**

31.4+3x2-5 Using the order of operations, simplify the expression above. Which of the following is correct? A. -21 B. -5 C. 5 D. 9
*Tuesday, July 22, 2014 at 6:35pm*

**math/help**

Find the measure of the supplement of a 22 angle.
*Tuesday, July 22, 2014 at 6:12pm*

**Math Problem Solving**

in a following pattern, one hexagon takes 5 toothpicks to build, two hexagons take 11 toothpicks to build, and so on. How many toothpicks would it take to build (a) 10 hexagons? (b) n hexagons? a 50 b ???
*Tuesday, July 22, 2014 at 4:15pm*

**Math**

When a cue ball strikes another ball, what is the largest possible angle the struck ball can be deflected from the line along which the cue ball was travelling?
*Tuesday, July 22, 2014 at 4:12pm*

**math**

A series is defined by 8+4+2+1+1/2+1/4+...+1/32 Write the series in sigma notation
*Tuesday, July 22, 2014 at 2:58pm*

**Math**

A, B, C, and D are points on a line, and the lengths of the line segments are: AB = 12, BC = 4, CD = 7, and DA = 15. Which of the following is a possible order for the points? A.A,B,C,D B. A,C,D,B C. A,D,C,B D. A,C,B,D
*Tuesday, July 22, 2014 at 2:57pm*

**math**

find the sum of an A.P.of eleven terms whose first term is 1 and whose last term is 6.
*Tuesday, July 22, 2014 at 2:53pm*

**math**

A concrete sidewalk 3 feet wide, 18 feet long, and 4 inches thick contains how many cubic feet of concrete?
*Tuesday, July 22, 2014 at 2:07pm*

**math**

A page in an average newspaper has 8 columns of print. Each column consists of 160 lines and each line averages 6 words. What’s the average number of words on a full page?
*Tuesday, July 22, 2014 at 1:49pm*

**Math**

Good day please help.Iam struggling with number patterns,i must fid the rule and also give the nextthree numbers in the sequence. 31;30;27,22;15
*Tuesday, July 22, 2014 at 12:13pm*

**Math**

The hypotenuse (side C) of a triangle is 13 inches long. Which of the following pairs of measurements could be correct for the lengths of the other two sides of the triangle? (Note: N + 82 =C2) A. 2.5 inches,4 inches B. 2.5 inches, 6 inches C.5inches, 8inches D.5inches, 12inches
*Tuesday, July 22, 2014 at 12:08pm*

**Math**

A man cheats 5% on the both side when buying and selling a products. find what will be the gain percent of the man?
*Tuesday, July 22, 2014 at 7:40am*

**Math 221*revised***

17 < BMI <= 22 might have a longer life span than average 23 < BMI <= 25 probably not overweight 25 < BMI <= 30 probably overweight BMI > 30 obese **Have to use height of 62 inches and 150 pounds**
*Tuesday, July 22, 2014 at 12:02am*

**Math 221**

Formula 17 < BMI <= 22 might have a longer life span than average 23 < BMI <= 25 probably not overweight 25 < BMI <= 30 probably overweight BMI > 30 obese **Have to use height of 5'2 and 150 pounds**
*Monday, July 21, 2014 at 11:54pm*

**Math**

#1 Mr. Jones got a loan for a sum of money, and at the time of repayment he owed $75 in interest. Mr. Brown borrowed three times the amount of money Mr. Jones had borrowed at the same rate of interest for twice as long a time. How much interest does Mr. Brown pay? #2 Mr. Baker...
*Monday, July 21, 2014 at 10:46pm*

**math**

#1 In an original group, the probability of choosing a girl from that group was 1/3. When 1 more girl joins the group, the probability of choosing a girl out of the group changes from 1/3 to 3/7. How many boys were there in the group orginally? a. 1 b. 2 c. 3 d. 4 e. 5 #2 A ...
*Monday, July 21, 2014 at 10:27pm*

**math**

f(x)=2x-3
*Monday, July 21, 2014 at 9:50pm*

**math**

If the price of an item, after adding the 7.6% sales tax, is $53.80, what is the price of the item, before tax?
*Monday, July 21, 2014 at 9:28pm*

**math**

For the following pair of functions, f(x)-x+2, g(x)-√x-1 find each of the following and state its domain: a.) find (f+g)(x) b.)find (f-g) (x) c.) find (fg)(x) d.) find (ff)(x) e.)Find (f/g)(x)
*Monday, July 21, 2014 at 9:06pm*

**math **

a 20ft flag pole casts a shadow 30ft long. the pole is 25ft from the wall. how high is the wall in the nearest tenth?
*Monday, July 21, 2014 at 8:38pm*

**math**

If 25 times were moved from Box A to Box B, there would be an equal number of dimes in both boxes. If 100 dimes were moved from Box B to Box A, the ratio of dimes in Box A to Box B would be 7:2. What was the original number of dimes in Box A?
*Monday, July 21, 2014 at 8:35pm*

**math**

15. The sum of five unequal whole numbers is 90. The second largest of these five numbers can be at most A.19 B.41 C.43 D.89 please explain and show work.
*Monday, July 21, 2014 at 7:29pm*

**Math 221**

What is the difference between a conditional and literal equation?
*Monday, July 21, 2014 at 2:09pm*

**math**

Susan’s test scores are 93, 85, 88, and 90. What does she need to score on the next test to raise her average to 90?
*Monday, July 21, 2014 at 1:53pm*

**Math 221**

What is the difference between a conditional and literal equation?
*Monday, July 21, 2014 at 1:33pm*

**Math 221**

What is the equation for W? P=2L+2W
*Monday, July 21, 2014 at 1:21pm*

**Math 221**

P=2L+2W
*Monday, July 21, 2014 at 11:58am*

**Math**

Lisa's livingroom is 17 feet wide. If the length is 4 feet more than twice the width, what is the area of her livingroom?
*Monday, July 21, 2014 at 9:30am*

**math**

what is the radius of convergence for the sum n=1 to infinity of 3(-1)^n(n)(x^n)?
*Monday, July 21, 2014 at 8:34am*

**Math**

A homeowner is laying sod in her lawn. The lawn is a rectangle with dimensions of 28'*18'. If one piece of sod is a rectangle with dimensions of 60cm*40cm, approximately how many pieces of sod should the homeowner order?
*Sunday, July 20, 2014 at 10:35pm*

**Math 221**

Solve the inequality for v. 6v+6 > -30 - >Greater than or less than symbol -
*Sunday, July 20, 2014 at 10:27pm*

**Math 221**

Write the following as an inequality. 9 is greater than y , and is less than or equal to y
*Sunday, July 20, 2014 at 10:09pm*

**Math 221**

Solve the inequality for v. 6v+6 > -30 -
*Sunday, July 20, 2014 at 10:07pm*

**math**

The distriubution of the SAT scores in math for an incoming class of business students has a mean of 580 and standard deviation of 25. Assume that the scores are normally distributed. a. Find the probability that an individual's SAT score is less that 550. b. Find the ...
*Sunday, July 20, 2014 at 9:10pm*

**Math 221**

2 is less than y , and 7 is greater than y or equal to Use only once in your inequality.
*Sunday, July 20, 2014 at 8:35pm*

**Math**

Solve the inequality for x. 29> 5+4x -
*Sunday, July 20, 2014 at 8:24pm*

**Math 221**

Joe rented a truck for one day. There was a base fee of $15.99 , and there was an additional charge of 97 cents for each mile driven. Joe had to pay $295.35 when he returned the truck. For how many miles did he drive the truck?
*Sunday, July 20, 2014 at 8:14pm*

**Math**

Financial aid students must pass 2/3 of their courses each term in order to continue their aid. If a student is taking 18 hours, how many hours must be passed?
*Sunday, July 20, 2014 at 6:25pm*

**Math**

I need some help with solving this problem: Find the solution set for the system of linear inequalities. x – y ≥ 3 x + 2y ≥ 6
*Sunday, July 20, 2014 at 3:07pm*

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