Wednesday

October 22, 2014

October 22, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**math**

A study shows that 6% of household appliances fail during any given year. If a person has 6 household appliances, what is the probability that exactly 2 of them will fail next year? (9/2)*.06^2*.94^7 this is how I worked it but it was wrong can you tell me where I went wrong ...
*Monday, October 6, 2014 at 1:51pm*

**Math**

Mr. Box lives on the fourth floor of a building and looks out of his window 46 feet above the sidewalk. A cat on the sidewalk below hears the window open and looks up at an angle of elevation of 75º. How far is the cat in feet from the edge of the building? (Enter only ...
*Monday, October 6, 2014 at 1:17pm*

**math**

Solve the proportion for u. (u−2) : (u+3) = 4 : 3
*Monday, October 6, 2014 at 11:56am*

**math**

Riding on a school bus are 20 students in 9th grade, 10 in 10th grade, 9 in 11th grade, and 7 in 12th grade. Approximately what percentage of the students on the bus are in 9th grade?
*Monday, October 6, 2014 at 11:52am*

**Math, ASAP Please**

If you place $1,000.00 in a savings account with an interest rate of 5.25/month, how much should you earn in interest at the end of the month?
*Monday, October 6, 2014 at 11:46am*

**math**

Why is 5 to the negative 4 power= 1/5 to the fourth power?
*Monday, October 6, 2014 at 10:32am*

**Math Gr 12**

State the x and y intercepts for each function below. Show all of your work. 1 y= ---- + 3 x-2
*Monday, October 6, 2014 at 9:02am*

**7th grade math**

Can you check me answer? Mrs. Acosta's car can travel an average of 24miles on each gallon of gasoline. Write and solve an equaltion to find how many gallons of gasoline she will need for a trip of 348 miles. Ans: 348 = 24g 348/24 = g 14.5 = g. She will need 14.5 gallons ...
*Monday, October 6, 2014 at 8:13am*

**math**

A theater contains 441 seats and the ticket prices for a recent play were $45 for adults and $21 for children. if the total proceeds were 13,797 for a sold out matinee, how many of each type of ticket were sold?.
*Monday, October 6, 2014 at 2:34am*

**Math**

write an example of a part to whole ratio.
*Sunday, October 5, 2014 at 11:55pm*

**Math**

Considering the word Mathematics, what is the ratio of vowels to consonants? Write the ratio 3 ways. word form: colon form: fraction form:
*Sunday, October 5, 2014 at 11:51pm*

**Math**

A movie poster shows King Kong towering over an adult human. On the poster, King Kong measures 42cm, while the human measures 5 cm. How tall is King Kong supposed to be, to the nearest foot?
*Sunday, October 5, 2014 at 11:44pm*

**Math**

Farmer Jane has only pigs and chickens on her farm. She can't remember how many of each she has but she does know she counted 110 legs and 35 heads. Assuming that each animal is normal, how may of each animal does she have?
*Sunday, October 5, 2014 at 10:54pm*

**Math**

let s(t)= t^4-4t^3+8t for 0 ≤ t ≤ 4 find the total distance traveled by the object. find where the acceleration is positive.
*Sunday, October 5, 2014 at 10:35pm*

**math**

the sum of three times a number and 5 is equal to the sum of the number and 11.
*Sunday, October 5, 2014 at 10:33pm*

**Math**

Water is leaking out of an inverted conical tank at a rate of 0.0109 {\rm m}^3{\rm /min}. At the same time water is being pumped into the tank at a constant rate. The tank has height 9 meters and the diameter at the top is 4.5 meters. If the water level is rising at a rate of ...
*Sunday, October 5, 2014 at 10:29pm*

**math factoring**

factor 2x^4+12x^3-18x^2-108x
*Sunday, October 5, 2014 at 10:05pm*

**math**

(-6x)2square for x=4
*Sunday, October 5, 2014 at 9:47pm*

**MATH**

There is a 3-meter tall vertical ladder from the ground to a ramp. The bottom of the ladder is 10 m from the base of the ramp. The distance along the ramp from the top of the ladder to the loading platform is 24 m. How high above the ground is the loading platform?
*Sunday, October 5, 2014 at 9:40pm*

**Math**

Which term would best describe the following scenario? Vivian solved an equation. She showed all her steps and got the correct answer. What kind of reasoning did Vivian use to solve the equation? A- convenient B- inductive C- predictive D- deductive My choice is D. Which term ...
*Sunday, October 5, 2014 at 9:35pm*

**Math**

For each of the following questions, choose the correct answer. Which statement best describes inductive reasoning? A- It uses previously proven or accepted properties to reach a conclusion. B- It uses observation of patterns and past events to reach a conclusion. C- It uses ...
*Sunday, October 5, 2014 at 9:31pm*

**Math**

Mitchell is hired to paint on a wall with the area of 21 1/8 of square yards. If the wall is 3 1/4 yards long, what is the width?
*Sunday, October 5, 2014 at 9:23pm*

**math**

Max had 4/5 bag of trail mix. He divided the trail mix equally amoung 5 friends. What fraction of the full bag of trail mix did each friend receive?
*Sunday, October 5, 2014 at 9:14pm*

**math**

Leah picked 2.6 pounds of blackberries. Ashlyn picked 1.8 times as many pounds of blackberries. How many pounds of blackberries did Ashlyn pick?
*Sunday, October 5, 2014 at 9:09pm*

**Math**

For the equation given below, evaluate dy/dx 3y^2-3x^2+9=0 at the point (2,1)
*Sunday, October 5, 2014 at 9:02pm*

**Math**

Find the linearization L(x) of the function g(x) = xf(x^2) at x = 2 given the following information. f(2)=1 f'(2)=8 f(4)=4 f'(f)=-3 L(x)=
*Sunday, October 5, 2014 at 8:59pm*

**Math**

The circumference of a sphere was measured to be 74.000 cm with a possible error of 0.50000 cm. Use linear approximation to estimate the maximum error in the calculated surface area. Estimate the relative error in the calculated surface area. Must be accurate to the fifth ...
*Sunday, October 5, 2014 at 8:56pm*

**Math**

What is the linear approximation of the square root of 8.9? Must be accurate to the fifth decimal place. I have tried entering 2.98328 and 2.98328 but that does not appear to be correct. Please help!!
*Sunday, October 5, 2014 at 8:50pm*

**Math**

A street light is at the top of a 17 ft tall pole. A woman 6 ft tall walks away from the pole with a speed of 8 ft/sec along a straight path. How fast is the tip of her shadow moving when she is 30 ft from the base of the pole? Must be accurate to fifth decimal place. I have ...
*Sunday, October 5, 2014 at 8:47pm*

**Math**

The bookseller sells packages of 15 pens each and 12 pencils each.they want the same number of pens and pencils in their next order.find the smallest number of packages
*Sunday, October 5, 2014 at 8:38pm*

**math**

there are 32 boys and 24 girls. what re the various number of teams that can be made that would have the same number of boys and girls on each team?
*Sunday, October 5, 2014 at 8:37pm*

**Math**

What is the linear approximation of the square root of 8.9? Must be accurate to the fifth decimal place. I have tried entering 2.98328 but that does not appear to be correct.
*Sunday, October 5, 2014 at 8:34pm*

**Math**

A conical water tank with vertex down has a radius of 10 feet at the top and is 22 feet high. If water flows into the tank at a rate of 30 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 14 feet deep? I have tried several times but keep ...
*Sunday, October 5, 2014 at 8:13pm*

**Math**

What is the linear approximation of the square root of 8.9? Must be accurate to the fifth decimal place. I have tried everything it seems like yet cannot get the right answer.
*Sunday, October 5, 2014 at 8:10pm*

**Math**

A spherical balloon is to be deflated so that its radius decreases at a constant rate of 12 cm/min. At what rate must air be removed when the radius is 5 cm? Must be accurate to the 5th decimal place. I keep getting -3769.91118. What am I doing wrong? Please help!
*Sunday, October 5, 2014 at 8:08pm*

**Math**

Water is leaking out of an inverted conical tank at a rate of 0.0109 {\rm m}^3{\rm /min}. At the same time water is being pumped into the tank at a constant rate. The tank has height 9 meters and the diameter at the top is 4.5 meters. If the water level is rising at a rate of ...
*Sunday, October 5, 2014 at 8:06pm*

**Math Check**

Hi! Can someone check this and see if they are correct? Thanks! 1.) Which value of x should the expression be further simplified? √(21)x a.) 5 B.) 6 c.) 11 D. 55 My answer: a 2.) 2√43x is show: Which value of x makes the expression equivalent to 14√43? a.) 7 ...
*Sunday, October 5, 2014 at 7:55pm*

**Math**

A conical water tank with vertex down has a radius of 10 feet at the top and is 22 feet high. If water flows into the tank at a rate of 30 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 14 feet deep? I have tried several times but ...
*Sunday, October 5, 2014 at 7:47pm*

**Math**

A spherical balloon is to be deflated so that its radius decreases at a constant rate of 12 cm/min. At what rate must air be removed when the radius is 5 cm? Must be accurate to the 5th decimal place. It seems like an easy question but no matter how many times i attempt it I ...
*Sunday, October 5, 2014 at 7:43pm*

**Math**

A sixth grader weighs 90 pounds which is 120% of what he weighed in 4 th grade. How much did he weigh in 4th grade? 90x100=9000/120= 75 So he weighed 75lbs is this correct?
*Sunday, October 5, 2014 at 7:17pm*

**Math**

Water is leaking out of an inverted conical tank at a rate of 0.0109 {\rm m}^3{\rm /min}. At the same time water is being pumped into the tank at a constant rate. The tank has height 9 meters and the diameter at the top is 4.5 meters. If the water level is rising at a rate of ...
*Sunday, October 5, 2014 at 7:13pm*

**Math**

In a parking lot 16% of the cars are blue. There are 4 blue cars in the lot. How many cars are not blue? 4x100=400\16= 25 then minus 4 blue cars to get the answer that 21 of the cars are not blue. I know the answer is 21 I'm just not sure if the work is correct?
*Sunday, October 5, 2014 at 7:06pm*

**Math**

If the side of a square is doubled in size to 8", by what percent did it's area increase?
*Sunday, October 5, 2014 at 7:00pm*

**Math Gr 12**

Using proper notation, describe the end behaviour of y = 1 -------- + 3 X-2
*Sunday, October 5, 2014 at 6:53pm*

**Math**

A 5" by 7" picture is enlarged to 8" x 10". By what percent did it's area increase?
*Sunday, October 5, 2014 at 6:40pm*

**Math**

A uniform bar 1.100 metres in length and having a cross sectional area of 19.500cm square is subject to a loading of 5050.000 newtons. This load causes an extension to the bar length of 2.610mm.Calculate the stress and strain produced
*Sunday, October 5, 2014 at 5:42pm*

**Math**

Solving long division polynomials 5x-6/10x^2-7x-6
*Sunday, October 5, 2014 at 4:57pm*

**math**

At noon, ship A is 20 nautical miles due west of ship B. Ship A is sailing west at 24 knots and ship B is sailing north at 25 knots. How fast (in knots) is the distance between the ships changing at 5 PM? I have tried multiple times but keep getting confused.
*Sunday, October 5, 2014 at 4:56pm*

**probability;math**

A card is chosen at random from a deck of 52 cards It is then replaced and then a second card is chosen.What is the probability of choosing a jack and then an eight?
*Sunday, October 5, 2014 at 4:49pm*

**math**

The equation of line l is 3x-4y=24. the line intersects the x -axis at A and the y -axis at B. GIVEN THAT M is the point (4,-3) and O is the origin . find the length of AB .
*Sunday, October 5, 2014 at 3:43pm*

**Math **

Lyle is putting his videotapes on a shelf.the shelf is 12 inches long.if each videotape is 1 1/2 inches wide,how many videotapes can he put side by side on the shelf?
*Sunday, October 5, 2014 at 3:20pm*

**Math**

4X^2+4y^2-8X-20y+13=0
*Sunday, October 5, 2014 at 2:55pm*

**Math**

How would you solve this function algebraically. f(x)=-5v-4x+4+2?
*Sunday, October 5, 2014 at 2:37pm*

**math**

If I borrowed $15000 in April 2008 at 6% interest and have paid $150 per month since then, how much have I paid and how much do I owe?
*Sunday, October 5, 2014 at 2:18pm*

**math**

2t + 8 greater than or equal to -4(t + 1)
*Sunday, October 5, 2014 at 1:46pm*

**math**

In mathematics class, 30 students received an A on the third test, which is 125% of the students who received an A on the second test. How many students received an A on the second test?
*Sunday, October 5, 2014 at 1:43pm*

**Math**

Julie is conducting an experiment where she placed 29.5 mL of water in a calorimeter at 15.0 °C. Then, 2.4 g of A (molar mass = 48.0 g/mol), also at 15.0°C, is added to the water in the calorimeter and the temperature of the solution increases to 28.0 °C. The ...
*Sunday, October 5, 2014 at 1:26pm*

**math problem**

the school cafeteria serves pizza every sixth day and applesauce every eighth day. suppose that pizza and applesauce are both on today's menu. In how many days will they be together on the menu again?
*Sunday, October 5, 2014 at 12:43pm*

**math**

a painter earns $15 per hour. what is the minimum number of hours he must work to earn at least $200? write an inequality to represent this situation and solve.
*Sunday, October 5, 2014 at 12:06pm*

**math**

A medical researcher believes that the standard deviation of the temperatures of newborn infants is greater than 0.6 degrees. A sample of 15 infants was found to have a standard deviation of 0.8 degrees. At the 0.10 level of significance, does the evidence support the ...
*Sunday, October 5, 2014 at 10:50am*

**Math**

1.) Which of the following inequalities is true for all real values of x? a.) x^3≥^2 b.) 4x^2≥2x^2 c.) (3x)^2≥4x^2 d.) 2(x-3)^2≥2x^2-3 2.) Which following inequalities is true for all real values of x? a.) x^5≥x^4 b.) 5x^2≥2x^3 c.) (5x)^2&#...
*Sunday, October 5, 2014 at 9:24am*

**Math**

20. Find the product of 987.2365 and 1,000. A. .9872365 B. .09872365 C. 987,236.5 D. 9,872,365 Ohh now I see it is C
*Saturday, October 4, 2014 at 10:02pm*

**Math**

A 5x7 photo fits in a frame with a 2 1/4 inch boarder. What is the perimeter of the entire shape
*Saturday, October 4, 2014 at 9:56pm*

**math**

A person purchased a $204,815 home 10 years ago by paying 10% down and signing a 30-year mortgage at 10.2% compounded monthly. Interest rates have dropped and the owner wants to refinance the unpaid balance by signing a new 30-year mortgage at 5.1% compounded monthly. How much...
*Saturday, October 4, 2014 at 9:41pm*

**Math**

How do you solve the equation by completing the square X^2+4x=10
*Saturday, October 4, 2014 at 9:11pm*

**Math**

a truck can be rented from company A for $100 a day plus $0.60 per mile and company B charges $50 a day plus $0.80 per mile to rent the same truck. Find the number of miles in a day at which the rental costs for company A and B are the same.
*Saturday, October 4, 2014 at 8:16pm*

**Math**

6. If 31/2 pounds of bananas cost $.98, how much would one pound cost? A. $.20 B. $.14 C. $.28 D. $.18 C? 7. A used car is priced at $2,695. If you borrow the money for the car, your payments will be $122 a month for 30 months. How much will you save by paying cash? A. $965 B...
*Saturday, October 4, 2014 at 7:33pm*

**1333 math **

Probability Scores 0.2 0 0.2 2 0.05 4 0.45 7 0.1 9 Find the variance of the above random variable random variable.
*Saturday, October 4, 2014 at 7:19pm*

**math**

A jar contains 8 pennies, 3 nickels and 4 dimes. A child selects 2 coins at random without replacement from the jar. Let X represent the amount in cents of the selected coins. Find the expected value of X.
*Saturday, October 4, 2014 at 7:14pm*

**Math**

A regulation baseball bat must be 2/3/4 inches or less in diameter and shorter than 42 inches long. Which bat would not be allowed? a)diameter 6cm b) length 0.9m c)diameter 7m d)length 1.0668m d?
*Saturday, October 4, 2014 at 6:43pm*

**math**

Solve 2s^3-4r^2 if r=1 and s=5 I did 2*5*5*5=250 4*1*1=4 250-4=246 I also added 2*5^3-4*1^2=246 Am I correct? Thanks
*Saturday, October 4, 2014 at 6:36pm*

**Math**

Convert 86 inches to yards, feet, and inches? Why the inches again?
*Saturday, October 4, 2014 at 6:30pm*

**Math**

Scarlet-Camille needs three lengths of wood to finish a project. She needs one piece measuring 148 cm, one piece measuring 38 cm, and one piece measuring 42 cm. Every time Scarlet-Camille cuts a length of wood she loses 3 mm of wood. If Scarlet-Camille can only purchase lumber...
*Saturday, October 4, 2014 at 5:56pm*

**math**

Lester jogs 5 3/4 miles on each day that he jogs. Last month, he jogged a total of 115 miles. How many days did he jog last month?
*Saturday, October 4, 2014 at 5:50pm*

**Math**

1. A strip of wood 78 inches long is to be cut into pieces 3 3/4 inches long. How many pieces can be cut? A. 12 B. 26 C. 20 D. 21 C?
*Saturday, October 4, 2014 at 5:44pm*

**math evaluation **

So how am I suppose to Evaluate the expression and put it in simplest form? It's 7th grade math. The question I need help on is: -8/3 + 1/4. If u comment and show me how u got an anwser THANKS!!!!!
*Saturday, October 4, 2014 at 5:00pm*

**math**

a hall charges $30 per person for a sports banquet when 200 people attend. for every 10 extra people that attend, the hall will decrease the price by $1.50 per person. what number of people will maximize the revenue for the hall?
*Saturday, October 4, 2014 at 3:53pm*

**Math**

19. Paul can type 60 words per minute and Jennifer can type 80 words per minute. How does Paul's typing speed compare to Jennifer's? A. Paul can type 1/3 as fast as Jennifer. B. Paul can type 3/4 as fast as Jennifer. C. Paul can type 11/3 times as fast as Jennifer. D...
*Saturday, October 4, 2014 at 3:45pm*

**math**

If evies chicken lays 4 eggs in 5 days how many days will it take for evies chicken to 16 eggs?
*Saturday, October 4, 2014 at 2:39pm*

**Math**

2. Lavina wants to buy a rocking chair for $160. She will pay 10% down and pay the rest in six monthly installments. What will be the amount of each monthly payment? A. $27 B. $16 C. $24 D. $26 C?
*Saturday, October 4, 2014 at 2:15pm*

**Combinatorics (math)**

In a certain country, 40 roads lead out of each city. When all roads are open, it is possible to travel from any city to any other. Each road leads from one city to another; there are no dead end roads. If one road is closed for repairs, is it still necessarily possible to ...
*Saturday, October 4, 2014 at 12:51pm*

**Math**

-80=8b-15+5b How do I solve this and what does check mean?
*Saturday, October 4, 2014 at 12:45pm*

**Math Help**

Find the inverse of the following function algebraically. Show all work. f(x)=-5√-4x+4+2
*Saturday, October 4, 2014 at 10:28am*

**Math**

1.) An expression is show: √21x; for which value of x should the expression be further simplified? a.) 5 b.) 8 c.) 37 d.) 54 2.) An expression is show: √42x; for which value of x should the expression be further simplified? a.) 11 b.) 13 c.) 20 d.) 55
*Saturday, October 4, 2014 at 10:04am*

**Math**

What is (-7)^5 in expanded form? A. -7x-7x-7x-7x-7 B. -7.5 C. (-7)x7x(-7)x7x-7 D. 5x5x5x5x5x5x5 Is the answer A? Thanks
*Saturday, October 4, 2014 at 2:49am*

**math**

Sue needs 2/1/3 cups of flour for a batch of cookies. How many complete batches can she make with 10 cups if flour? A. 5 batches B. 3 batches C. 2 batches D. 4 batches D? Thanks
*Saturday, October 4, 2014 at 2:31am*

**math**

a 1000 seat multiplex is divided into 3 theatres. there are 310 seats in theatre A.theatre C has 180 seats then theatre B. how many seats are there in theatre b?
*Saturday, October 4, 2014 at 1:08am*

**Math**

Find the number of the sides of a regular polygon, if the measure of one of its exterior angle is between 28 and 32.
*Friday, October 3, 2014 at 11:10pm*

**Math**

If the measure of an interior angle of a regular polygon is 165, find the sum of the measures of its interior angles
*Friday, October 3, 2014 at 11:09pm*

**Math**

The sum of the measures of four of the angles of a heptagon is 520. Two of the remaining three angles are congruent. The other remaining angle is 3/2 the measure of one of the two congruent angles. Find the measures of the remaining angles.
*Friday, October 3, 2014 at 11:09pm*

**math**

Charles Sherwood(1838-1883) was an entertainer.In 1863 hermarried Lavinia Warren, who like himself was a dwarf. George W. Morrison, was the best man at the wedding. Use the following clues to find the height in inches of Charles Sherwood, his wife Lavinia and George Morrison. ...
*Friday, October 3, 2014 at 10:21pm*

**Math**

Pat and Kelly went hiking in the mountains. They started at 9,100 ft. They climbed 1,200 ft the first day, descended 900 ft the second day, and climbed 1,000 ft the third day. On the fourth day they descended 800 ft. What was the average altitude at which they hiked?
*Friday, October 3, 2014 at 10:21pm*

**math**

an average adult flea can jump 200 times the lenght of its own body. An adult flea is about 0.1 inch long. About how many feet can the average adult flea jump?If you were able to jump 200 times your height, about how many yards would you be able to jump?
*Friday, October 3, 2014 at 10:12pm*

**math**

8h x $9/h i really need help. i do not understand. Please help, Thank You in advance My work 8/h x 9/h= 72/h i dont know what to do next
*Friday, October 3, 2014 at 10:05pm*

**math**

Suppose there is a 2 degree drop in the temp for every thousand feet that an airplane climbs into the sky if the temp on the ground, which is at sea level is 64 degrees What would be the temp
*Friday, October 3, 2014 at 9:48pm*

**Math**

Rectangle ABCD has been subdivided into 4 regions. The areas of two of these regions are a^2 and 144. The combined area of the other two regions is 25a. What is the perimeter of the rectangle ABCD? Please help and show steps! I don't have a clue how to do this. Thank you ...
*Friday, October 3, 2014 at 8:50pm*

**math**

The number 57,733 contains two sets of digits in such digit is ten times as great as the other.What are the values of the digits in each set.
*Friday, October 3, 2014 at 8:42pm*

**MATH - 2ND GRADE**

Sonya has 140 beads. How many bags of 10 beads does she need so that she will have 200 beads in all?
*Friday, October 3, 2014 at 8:14pm*

**Math**

Kate is 5 years older than Lenny. Lenny is 2 years younger than Maria. Maria is twice as old as Norman. If Norman is 10 years old, how old is katie?
*Friday, October 3, 2014 at 8:11pm*

**Math**

16. If a sports shop sold 1,500 dozen golf balls last week, how many individual golf balls did the shop sell? A. 180 B. 125 C. 12,500 D. 18,000 D? 20. How many yards are in 7 miles? A. 12,320 B. 700 C. 36,960 D. 252 A?
*Friday, October 3, 2014 at 8:09pm*

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