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August 20, 2014

August 20, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**math**

What is the greatest common factor of 36, 20, and 8?
*Friday, July 11, 2014 at 1:05pm*

**math**

1 1 1 2 1 1211 111221 312211 What would be the next rung of the pyramid?
*Friday, July 11, 2014 at 12:26pm*

**MATH**

if f(x)=x[x] / sin[x] then show that there is no existence of lim f(x) x>0 2nd prob: show lim (tanx-sinx)/x^3 =1/2 x>0
*Friday, July 11, 2014 at 11:28am*

**math**

find the value lim[(cos x)^1/2 -(cos x)^1/3]/(sinx)^1/2 x>0
*Friday, July 11, 2014 at 11:13am*

**math**

find the value lim [sin(x+h)-sinx]/h h>0
*Friday, July 11, 2014 at 11:06am*

**math**

(25+5)(25-5)=0
*Friday, July 11, 2014 at 8:02am*

**Math literacy business studies life science and history**

Hi i was wondering which career path should i follow if im doing these subjects
*Friday, July 11, 2014 at 7:15am*

**math**

my height is 5'7" inches tall and 170 in cm, if i make it into an integer, what would it be in integer?
*Thursday, July 10, 2014 at 9:41pm*

**Math**

A factory produces fuses, which are packaged in boxes of 16. Three fuses are selected at random from each box for inspection. The box is rejected if at least one of the three fuses is defective. What is the probability that a box containing six defective fuses will be rejected?
*Thursday, July 10, 2014 at 7:50pm*

**Math**

If a hallway is 90 feet long & 7 feet wide and it takes 1/2 ounce of cleaning solution to clean 1 square foot, how much cleaning solution is needed to clean the hallway?
*Thursday, July 10, 2014 at 6:41pm*

**math**

Using the shadow method, Norman finds the height of a tree as follows: He measures the shadow of the measuring stick (4ft) and the tree (20ft). He then uses similar triangles to find the tree's height. If the measuring stick is 3 feet long, how tall is the tree? 4 feet ...
*Thursday, July 10, 2014 at 1:59pm*

**math**

George has been hired to paint the smith's house. He needs to be sure his ladder will reach the highest part of the house, so he decides to use the shadow method. The measuring stick is 3 ft., and tits shadow is 5 feet. The shadow of the house is 45 feet. The shadow of the...
*Thursday, July 10, 2014 at 1:35pm*

**math**

If [(x-5)(x.x-2x+1)/(x-7)(x.x+2x+3)]is positive for real value of x, then prove that there is no value of x between 5 & 7.
*Thursday, July 10, 2014 at 1:27pm*

**math**

The expression y=ax²+bx+c has always the same sign as of 'a' if:
*Thursday, July 10, 2014 at 1:07pm*

**Another question (math)**

What percent less than 3 is 2? Can you explain too?
*Thursday, July 10, 2014 at 11:45am*

**Math (Trying to understand) 4th**

Hi I need help with something. I need to understand what it is trying to ask me. Thanks. (This is online homework) Question: Omit % sign in all of the answers! Change the numbers to percent (don't round) Express your answer as a common fraction, not mixed number. So, for ...
*Thursday, July 10, 2014 at 11:33am*

**math**

Given that 2 log base2 (x+15) - log base2 x = 6 1.Show that x^2 -34x +225 = 0 2. Hence or otherwise solve the equation 2 log base 2 (x+15) - log base 2 x =6
*Thursday, July 10, 2014 at 10:29am*

**math**

Solve 4^y -7(2^y) = 8
*Thursday, July 10, 2014 at 10:24am*

**math**

Solve 3 log x = 1 + log (4x+5)/ log 2
*Thursday, July 10, 2014 at 10:24am*

**math**

Given that x = 2log t is a solution of the equation10^(2x+1) -7(10^x) -26 =0. Find t
*Thursday, July 10, 2014 at 10:22am*

**math**

the length of a car park is 120 m. longer than its width the area of the car park is 6400 m(2) how would you represents its width
*Thursday, July 10, 2014 at 8:28am*

**math**

what is the derivatice of 3x-4/4x+2
*Thursday, July 10, 2014 at 8:08am*

**math**

A woman buys a $ 78 necklace at a jewelry store. She gives the jeweler a check for $ 100. Because he does not have the $ 22 change, he goes to another merchant next door. There he exchanges the woman's check for $ 100 in cash. He returns and Gives the woman the necklace ...
*Thursday, July 10, 2014 at 6:04am*

**math**

Indicate the equation of the line through (2, -4) and having slope of 3/5
*Thursday, July 10, 2014 at 3:07am*

**math**

Indicate the equation of the line that is the perpendicular bisector of the segment with endpoints (4, 1) and (2, -5).
*Thursday, July 10, 2014 at 3:06am*

**math**

If the equation of a circle is (x + 5)2 + (y - 7)2 = 36, its center point is
*Thursday, July 10, 2014 at 2:28am*

**math**

If the point (a,3) lies on the graph of the equation 5x + y = 8, then a=
*Thursday, July 10, 2014 at 2:26am*

**math**

If the equation of a circle is (x + 5)2 + (y - 7)2 = 36, its radius is
*Thursday, July 10, 2014 at 2:26am*

**math **

The product of two numbers is 35. one of the numbers is n, what expression represents the other number?
*Wednesday, July 9, 2014 at 11:37pm*

**math**

a drug is supplied as a 20 mg/ml solution in a 50 ml vial. you need to make 15 ml of a 10 mg/ml solution. how much concentrate and how much diluent are needed to obtain the desired final volume?
*Wednesday, July 9, 2014 at 11:29pm*

**math**

Suppose that the height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. After hours of burning, a candle has a height of centimeters. After hours of burning, its height is centimeters. What is the height of the candle ...
*Wednesday, July 9, 2014 at 10:50pm*

**Math**

How do I work this problem? A license plate is to consist of 2 letters followed by 5 digits. Determine the number of different license plates possible if repetition of letters and numbers is not permitted. is this correct 26*26*10*10*10*10*10= 67,600,000
*Wednesday, July 9, 2014 at 10:39pm*

**math**

The radius of one sphere is twice as great as the radius of a second sphere. Find the ratio of their surface areas.
*Wednesday, July 9, 2014 at 10:33pm*

**Math**

Shantle and Kwamie are planning to buy their first home. Although they are excited about the prospect of being homeowners, they are also a little frightened. A mortgage payment for the next 30 years sounds like a huge commitment. They visited a few developments and scanned the...
*Wednesday, July 9, 2014 at 10:31pm*

**math**

what is procentage strength of a mixture made from 250 ml of witch hazel containing 16% alcohol, 150 ml of 90% alcohol and 450 ml of distilled water?
*Wednesday, July 9, 2014 at 10:28pm*

**math**

Find the slant height for a right circular cone with a radius of 3 and a height of 5.
*Wednesday, July 9, 2014 at 9:22pm*

**Math**

I am a number between 20 and 30. When you divide me into 6 equal groups,there is an even number in each group and 2 are left over.what number am I?
*Wednesday, July 9, 2014 at 7:24pm*

**math**

A random sample was taken from the normal IQ population, which has μ = 100 and σ = 15. ALL INFORMATION IS GIVEN: We gave a random sample of 25 undergrad students (n = 25) a new study pattern to see if it increases their IQ score. The samples mean IQ score is 112. The...
*Wednesday, July 9, 2014 at 9:19am*

**Math**

Parametrically represent a Mobius strip. Since I am very unfamiliar with this topic, Math jargon should appear as little as possible and please provide step by step working.
*Wednesday, July 9, 2014 at 9:17am*

**math**

student is taking up midterm exam for 3 minutes left to answer 10 remaining question of which there are 4 choices of answers for each question with only one choice correct. what is the probability of getting more than 5 of his answer is correct
*Wednesday, July 9, 2014 at 8:47am*

**math**

It has been found out that the probability that a child is a male in family is 0.4. In a family of 6 children, what is the probability that; i. exactly 5 are boys ? ii. at least 4 are boys ? iii. all boys
*Wednesday, July 9, 2014 at 6:07am*

**Math pre-calculus**

Write an expression for all of the vertical asymptotes of y=-3 csc(pi/4 *x) Can you list step by step to show how to do it , I don't understand this problem !!! Thanks
*Wednesday, July 9, 2014 at 1:27am*

**Math**

I have 3 questions: 1) If ABC and DEF are three- digit numbers, which of the following could be the number of digits in the product of ABC and DEF? i. 4 ii. 5 iii. 6 I don't have the vaguest idea on how to do this and what type of math it is part of... My answer is 6 only ...
*Tuesday, July 8, 2014 at 11:20pm*

**Math 221**

What is 5(8+v)= Please break it down for me to get a better understanding?
*Tuesday, July 8, 2014 at 10:35pm*

**Math**

the time required for one complete oscillation of a pendulum is called its period. if the length L of the pendulum is measured in feet and the period P n seconds, then the period is given by P=2¶(L/g)^1/2, where g is constant. use differentials to show the percentage ...
*Tuesday, July 8, 2014 at 10:00pm*

**English**

1. He has studied math for three hours. 2. He has been studying for three hours. ---------------- Are both grammatical? Which one is commonly used?
*Tuesday, July 8, 2014 at 9:16pm*

**math**

The given curve is rotated about the y-axis. Find the area of the resulting surface. y = 3 − x2, 0 ¡Ü x ¡Ü 4
*Tuesday, July 8, 2014 at 5:44pm*

**math**

5.Escape velocity is the speed necessary to escape the gravitational pull of a plant. The escape velocity of Earth is 11.3 kilometers per second, while the escape velocity of Saturn is 310% of that. What is the escape velocity of Saturn?
*Tuesday, July 8, 2014 at 5:39pm*

**math**

3.Students at one school sell magazine subscriptions to raise money for athletic equipment. The school keeps 20% of sales. How many dollars worth of subscriptions must be sold to make $1500?
*Tuesday, July 8, 2014 at 5:31pm*

**Math**

Write a formula expressing the information: i)Rose paid twice as much as Mike I used R for Rose and M for Mike The formula I cam up with is R=2M ii)Taxes are 6 percent of income [Use T and x] So I wrote it like this T(0.06)/X iii)There are twenty times as many students as ...
*Tuesday, July 8, 2014 at 5:25pm*

**math**

A ship model is 0.5% actual size. If the model is 1 meter long, what is the actual length of the ship?
*Tuesday, July 8, 2014 at 4:59pm*

**Math**

Ship A heads north at a speed of 22.2 km/h while ship B heads east Twenty two hours later they are 863 km apart
*Tuesday, July 8, 2014 at 1:27pm*

**math**

The fourth and ninth term of an a.p are -3 and 12 repectively find:the common different and the sum of the first seven term.
*Tuesday, July 8, 2014 at 1:12pm*

**math**

What number sets does square root 3 belong to?
*Tuesday, July 8, 2014 at 12:25pm*

**math**

It is important for Bob to have a gross salary in his fifth year of at least $100,000. He is promised salary increases of 3 percent per year in the second and third years and 5 percent thereafter. What must be his starting salary be to achieve his goal? My original answer was...
*Tuesday, July 8, 2014 at 11:56am*

**Math**

what is the maximal number of consecutive 3-digit numbers that have at least one odd digit?
*Tuesday, July 8, 2014 at 11:38am*

**Math (statistics)**

In an examination a candidate is given the four answers to four questions but is not told which answer applies to which question. He is asked to write down each of the four answers next to its appropriate question. b). show that there are 6 ways of getting just two answers in ...
*Tuesday, July 8, 2014 at 11:21am*

**math**

In order for a spacecraft to reach Earth's orbital velocity, it must achieve a speed of 17,500 mph in 610 seconds after its first stage burnout where it should have achieved a speed of 1530 mph. What percent increase in speed per second is necessary after first stage in ...
*Tuesday, July 8, 2014 at 11:20am*

**chem/math**

I need help solving for x here (I dont get the right answer, which is supposed to be x=0.137) 3.88 = 3.74 + log (x/0.1) Please explain how you would get that answer Thank you
*Tuesday, July 8, 2014 at 6:30am*

**MATH**

need word problem help. One half of the total budget of $5,000 was for salaries. Three fifths of that amount was paid to 4 employees. How much of the budget was spent on employees? 1/2 of 5,000 = 2,500 2500 divided by 3/5 = 4166 2/3 Am I on the right track?
*Tuesday, July 8, 2014 at 2:00am*

**business math**

Assume 450,000 people line up on the streets to see the Macy's Thanksgiving Parade in 2010. If attendance is expected to increase 30%, what will be the number of people lined up on the street to see the 2011 parade?
*Tuesday, July 8, 2014 at 1:15am*

**Math**

Encircle the error in the following "proof" that the two arbitrary numbers are equal to each other. Let a and b the arbitrary numbers such that a is not equal to b. Then, (a - b)^2 = a^2 - 2ab + b^2 = b^2 - 2ab + a^2 (a - b)^2 = (b - a)^2 a - b = b - a 2a = 2b a = b
*Monday, July 7, 2014 at 11:41pm*

**Math**

Consider the general quadratic equation ax^2 + bx + c = 0, where a is not equal to 0. Solve for x by completing the square.
*Monday, July 7, 2014 at 11:23pm*

**Math**

Find the monthly payment. Mortgage amount Annual percentage rate 2. $146,800 5.25% 30 years 4. $113,400 5% 15 years 6. Find the interest paid the mortgage in exercise 2. 8. Find the total interest paid for the mortgage in exercise 4.
*Monday, July 7, 2014 at 10:46pm*

**Math**

In interviewing November's statement she notices that her beginning balance was $600 and that she made a $200 payment on November 10. She also charged purchases of $80 on November, 5, $100 on November 15, and $50 on November 30. She paid $5.27 in interest the month before...
*Monday, July 7, 2014 at 10:37pm*

**math**

. Four tablespoons of extract are mixed with 240 ml of oral suspension base. What is the final concentration of the suspension?
*Monday, July 7, 2014 at 9:43pm*

**Math/Statistics**

A group of 10 students have average of GPA of 2.8 with SD of 0.3. Does this group present enough evidence to indicate that the average GPA is less than 3.0? Make your decision at a 5% level of significance.
*Monday, July 7, 2014 at 6:29pm*

**math**

There are 60 coins in a box containing only nickels, dimes, and quarters. If there is one more than twice as many dimes as quarters, and the total value of all dimes is five cents less than the total value of all nickels, how many of each denomination are in the box?
*Monday, July 7, 2014 at 5:43pm*

**math**

Sue is two years older than Chris. Jim is 4 years older than Sue. Their ages total 68. How old is Sue?
*Monday, July 7, 2014 at 5:40pm*

**math**

17. Jenny, Greg, & Hank gather their marbles and have 20 in total. If Jenny has 3 less than twice the number Greg has, and Hank has 1 less than Greg has, how many marbles do each of them have?
*Monday, July 7, 2014 at 4:31pm*

**business math **

If refinishing your basement at a cost of $44,568 would add $18,520 to the resale value of your home, what percent of your cost is recouped? (Round to the nearest percent.)
*Monday, July 7, 2014 at 3:10pm*

**Math**

what is the future value of 500 deposits at the end of each year for eight years 8% compounded annually what is the annuity at the end of eight years
*Monday, July 7, 2014 at 2:13pm*

**math**

you have mixed equal parts of a 10 % and a 2,5 % benzocaine ointment what is the resulting concentration?
*Monday, July 7, 2014 at 1:18pm*

**math**

you have mixed 25g of 2%crem into 35g of 6% cream. What is the resulting concentration?
*Monday, July 7, 2014 at 1:17pm*

**math**

the population of Erik's school increased by 5% from last year to this year. This year, there were 15 more students in his school than last year. How many students were in Erik's school last year?
*Monday, July 7, 2014 at 12:24pm*

**math**

A patient needs 45% dextrose 100ml The pharmacy has only 70% dextrose 500ml. a) how much concentrate will you need b) how much diluent
*Monday, July 7, 2014 at 11:59am*

**math**

If a b c are non zero,unequal rational numbers then prove that the roots of the eqn (abc²) x²+ 3a²cx+b²cx-6a²-ab+2b²;=0 are rational.
*Monday, July 7, 2014 at 11:47am*

**math**

If p,q,r,s belongs to R and pr=2(q+s) then show that atleast one of the eqn x²+px+q=0,x²+rx+s=0 has real roots.
*Monday, July 7, 2014 at 11:45am*

**math**

There are 25 red beads,x blue beads and y green beads in a box.When a bead is picked at random,the probability that it is blue is 1 over 4 and the probability that it is green is 1 over 3. (a)Find the value of x and y. (b)How many blue beads must be added so that the ...
*Monday, July 7, 2014 at 11:37am*

**math**

Find the value of 'a' so that x²-11x+a=0 and x²-14x+2a=0 have a common root.
*Monday, July 7, 2014 at 11:33am*

**math**

In a bag,there are 18 cards of which x cards are coloured and the rest are white.When another 6 white cards are added into the bag,the probability of a white card being picked is x over 8.Find the value of x. Answer:6 How?
*Monday, July 7, 2014 at 10:23am*

**Math**

Add a term to b^2 - 4/5b to make the expression a perfect square. Write the results as the square of a bracketed expression.
*Monday, July 7, 2014 at 9:37am*

**Math**

If the largest two-digit number is added to 200, what is the sum?
*Monday, July 7, 2014 at 9:26am*

**Math**

a party of people go for an excursion in x cars, of which y cars each hold 4 people and the remainder 5. How many people were their in the party
*Monday, July 7, 2014 at 3:00am*

**math**

use a ruler and a pair of compass construct a triangle 6cm 5cm 7cm and the degree 45
*Monday, July 7, 2014 at 1:26am*

**Math**

If you purchase a fishing boat for 18 monthly payments of $106 and an interest charge of $238, how much is the refund after 10 payments
*Monday, July 7, 2014 at 12:32am*

**math**

A bathroom measures 250cm by 175cm.Calculate the side of the largest square tile that can be used to tile the floor without cutting.
*Sunday, July 6, 2014 at 11:28pm*

**Math**

A living room measures 450cm by 330cm.Find the dimension of the largest tile that can be used to tile the floor without cutting.
*Sunday, July 6, 2014 at 11:24pm*

**Math**

Find the discount (ordinary interest) and proceeds on a promissory note for $2,000 made by Barbara Jones on February 10, 2007, and payable to First State Bank on August 10, 2007, with a discount rate of 9%.
*Sunday, July 6, 2014 at 10:40pm*

**Math 221**

2 5 - / - 9 12 /-means divided by What is the simplest form?
*Sunday, July 6, 2014 at 9:41pm*

**Math 221**

2 5 - / - 9 12 / is divided by
*Sunday, July 6, 2014 at 9:30pm*

**Math 221**

A chess club with 55 members is electing a new president. Ali received 33 votes. What percentage of the club members voted for Ali?
*Sunday, July 6, 2014 at 8:43pm*

**Math**

When x is increased by 5, the result is 60% of increasing x by 15. What is the value of x? I got this far: x+5 = 0.60(x+15) x+5 = 0.60x + 9 x = 0.60x + 4 What is the next step?
*Sunday, July 6, 2014 at 7:33pm*

**Math**

Find the annual percentage rate on a loan of $1,500 for 18 months if the loan requires $190 interest and is repaid monthly.
*Sunday, July 6, 2014 at 6:40pm*

**Math**

Malinda Levi borrows $12,000 on a 9.5% , 90 day note. On the 30th day, Malinda pays $4,000 on the note. If ordinary interest is applied, what is Malinda’s adjusted principal after the partial payment? What is the adjusted balance due at maturity?
*Sunday, July 6, 2014 at 6:30pm*

**Math**

The finance charge on a copier was $1,778. The loan for copier was to be paid in 18 monthly payments. Find the finance charge refund if it is paid off in eight months.
*Sunday, July 6, 2014 at 6:28pm*

**Math**

Alice Dubois was charged $455 in finance charges on a loan for 15 months. Find the finance charge refund if she pays off the loan in full after 10 payments.
*Sunday, July 6, 2014 at 5:24pm*

**Math**

vacuum cleaner was purchase on the installment plan with 12 monthly payments $36.98 each. If the cash price was $415 and there was no down payment , find the annual percentage rate.
*Sunday, July 6, 2014 at 5:23pm*

**statistics**

Describe one of the following experiments, which study human subjects, in 450 to 750 words: A pharmaceutical company wants to test a new sleep aid. An educational company is interested in determining whether their new math curriculum will raise standardized test scores. ...
*Sunday, July 6, 2014 at 4:50pm*

**math**

if you have 600 cards and gave away 280 of them. to the nearest hundredth what percant of the cards is left
*Sunday, July 6, 2014 at 4:09pm*

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