Monday

December 22, 2014

December 22, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**Math and Phyics**

The mass of the body attached to the movable pulley is 12 times the mass of the body fixed to the ground. At some instant the body fixed to the ground is released. What will be the height that it can ascend? The heavier mass is initially h meter above the ground.
*Monday, December 22, 2014 at 4:42pm*

**6th grade Math**

What two expressions could be used to represent the cost of a speeding ticket on (1) streets and highways and (2) in construction and school zones?
*Monday, December 22, 2014 at 4:31pm*

**math**

what is an easier way to make decimal and fractions in least to greatest order. can u give me an example and thank u
*Monday, December 22, 2014 at 4:21pm*

**Math/Algebra 1**

You are making a knotted necklace. The table below shows the amount of string you need for different necklace lengths. Here's the table: Length of Necklace (inches) 10 11 12 13 Across from that to the right is: Amount of string (inches) 200 202 204 206 I need help on to ...
*Monday, December 22, 2014 at 4:19pm*

**math**

what is the greatest possible number that when rounded to the nearest millions will become a million
*Monday, December 22, 2014 at 3:14pm*

**Math and Phyics**

Mass points M and m are kept at the vertices of an equilateral triangle whose sides are of length a. 1. Find the distance between the center of mass of the system and mas point m. 2.Determine the moment of Inertia of the system about the center of mass
*Monday, December 22, 2014 at 3:12pm*

**math**

divide the piece of cloth, 40cm, in two parts so that the longest 1cm exceed twice the shortest piece. As measure the two parts
*Monday, December 22, 2014 at 2:40pm*

**math**

Manny makes dinner using 1 box pasta and 1 jar of sauce. If pasta is sold in packages of 6 boxes and sauce is sold in packages of 3 jars what is the least number of dinners that Manny can make without any leftovers?
*Sunday, December 21, 2014 at 7:23pm*

**math**

what are the base and exponent in the expression 5.6^4? add (3.4x10^6)+ (4.7x10^7)
*Sunday, December 21, 2014 at 6:29pm*

**math i really need help!!**

What is (5.93x10^5)-(2.71x10^4) scientific notation..
*Sunday, December 21, 2014 at 6:17pm*

**College Math**

variance of 30 for a data, what is the standard deviation
*Sunday, December 21, 2014 at 5:56pm*

**College Math**

numbers given are: 3.5, 2.6, 3, 3.1, 2.6, 2.8, range is 0.9 z-score of 3.1 is Okay I am lost
*Sunday, December 21, 2014 at 5:06pm*

**College Math**

mean of 21 and standard deviation of 1.2, what is the z-score of 21 No clue how to figure this out
*Sunday, December 21, 2014 at 4:50pm*

**College Math**

The number of visitors to your business website increased at a rate of 60% per day, going from 30 per day to 30,000 per day. How many days did it take to go from 30 to 30,000 visitors per day? 30,000(1+0.6) but I need to solve for t that's where I get lost.
*Sunday, December 21, 2014 at 4:23pm*

**math**

at a sale,josh bought 4 shirts and 3 pairs of jeans for $181.at the same store,mike bought 1 shirt and 2 pairs of jeans for $94.
*Sunday, December 21, 2014 at 4:13pm*

**Math**

Mount-Rush more is a sculpture that was curved using a model with a scale of 1 inch: 1 foot. Sculpture Refer to the information at the above. Find the scale factor and actual height of George Washington's face on the sculpture if the height of the the model's face is 5...
*Sunday, December 21, 2014 at 4:04pm*

**math**

In a box there are 3 red, 3 blue and 3 green balls. If 3 balls are picked from the box randomly, one by one, with replacement, what is the probability that none of them will be blue?
*Sunday, December 21, 2014 at 2:27pm*

**Math**

The clock struck midnight as the elves roared with approval for Santa to give his gift to Macy. How many hours would pass by if Santa could give out another gift tomorrow at midnight?
*Sunday, December 21, 2014 at 12:53pm*

**Math!**

On the train we had 41 different kinds of cookies. 3 different flavors of cocoa, and 122 candies. How many treats did we have in all?
*Sunday, December 21, 2014 at 12:49pm*

**Math**

the conductor looked at his pocket watch to see what time the train would be leaving. it read 8:37 pm. if it takes the polar express 3 hours and 15 minutes to get to the north pole, what time will it be when it arrives?
*Sunday, December 21, 2014 at 12:19pm*

**math**

A seed company claims that 9 of every 10 seeds will produce plants. How many plants should you get from a package of 220 seeds?
*Sunday, December 21, 2014 at 11:23am*

**Math-How do I do this problem?**

An inverted conical tank (with vertex down) is 14 feet across the top and 24 feet deep. If water is flowing in at a rate of 12 ft3/min, find the rate of change of the depth of the water when the water is 10 feet deep.
*Sunday, December 21, 2014 at 10:58am*

**Math**

An experimental solid disc flywheel has a 300m diameter and a mass of 70kg. Experiments show that, at all speeds of rotation, the frictional resistance to motion is equivalent to a torque of 0.15Nm. if when the flywheel is rotating at 50 rev/min, the driving power is removed, ...
*Sunday, December 21, 2014 at 8:54am*

**math**

The amount used to purchase one litre of petrol can be used to purchase three liters of diesel or five liters of kerosene. Out of a certain amount, $510 is spent on diesel. How much is spent on kerosene if equal volumes of three liquids are purchased with the total amount. ...
*Sunday, December 21, 2014 at 4:23am*

**Math**

If 12 ft^2 of material is available to make a box with a square base and an open top, find the largest possible volume of the box. 2 ft3 4 ft3 5 ft3 8.5 ft3 9 ft3 the whole ft^2 and ft^3 throws me off..can you help
*Sunday, December 21, 2014 at 3:14am*

**Math**

Determine which of the following is true for the function X^3+5x^2-8x+3 f(x) has a relative minimum at x = 2/3. f(x) has a relative maximum at x = 2/3 f(x) has a zero at x = 2/3 Both A and C are true. <----- Both B and C are true.
*Sunday, December 21, 2014 at 3:10am*

**math**

ashley bought 4 packages of juice boxes. there are 6 juice boxes in each package.she gives 2 juice boxes to each of 3 friends.how many juice boxes does ashley have left ?
*Saturday, December 20, 2014 at 8:19pm*

**Math**

For the data in the table, does y vary directly with x? If it does, write an equation for the direct variation. X Y 4 6 8 12 10 15
*Friday, December 19, 2014 at 6:27pm*

**Math**

Is -12x = 6y a direct variation? If so what is the constant of variation. My answer is yes it is a direct variation and the constant of variation is -2 but I want to make sure. Please help
*Friday, December 19, 2014 at 5:22pm*

**math**

Let X1,X2,…,X25 be random sample ~ normal(0,16) and Y1, Y2,…,Y25 be random sample ~ normal(1,9), assume the two samples are independent ,comput P(X>Y) where X=Sum(Xi)/25 and Y=Sum(Yi)/25
*Friday, December 19, 2014 at 4:45pm*

**Math**

rick has a box of coins. The box contains 51 coins. Which consist of pennies, dimes and quarters. The number of pennies equal the number of dimes the total value of the box of coins is 5.73. How many dimes? how many pennies ? how many quarters?
*Friday, December 19, 2014 at 4:34pm*

**Math**

Is the sequence arithmetic? 15, 14.5, 14, 13.5, 13,....If so, give the common difference.
*Friday, December 19, 2014 at 4:27pm*

**math**

let X~normal(0,16) and Y~normal(1,9), find P(X>Y)
*Friday, December 19, 2014 at 4:19pm*

**math**

let X~normal(0,16) and Y~normal(1,9), find P(X>Y)
*Friday, December 19, 2014 at 4:18pm*

**Math - Two-Step Inequalities - Please Help**

I need help with this one, please. Which of the following is in the solution set of the inequality –3 > –3t + 6? A. -1/3 B. 1/3 C. 4 D. -4 I did a Pre-Test for my lesson, and it says I got this one wrong. However, it doesn't say which one I picked. For this ...
*Friday, December 19, 2014 at 3:58pm*

**math**

At a local high school,560 out of 1060 students voted to support a community fund drive. What percent of the students did not support the fund drive? 47% is this the correct answer?
*Friday, December 19, 2014 at 3:42pm*

**Math**

The ordered pairs (0,-3), (1,2), (2,7), (3,12) represent a function. What is a rule that represents this function?
*Friday, December 19, 2014 at 3:36pm*

**math**

Final exam score above 92 corresponds to an A. Approximately what percent of the class got an A?
*Friday, December 19, 2014 at 1:56pm*

**math**

Wanda bought a pair of jeans for 32.50. She can purchase a second pair doe 40% off the regular price. How much will she spend on two pair of jeans?
*Friday, December 19, 2014 at 12:47pm*

**math**

divide 7/6 by 4
*Friday, December 19, 2014 at 11:36am*

**math**

Each year Coach Bradley orders new softballs for the team. According to her records, 15% of the softballs are lost during the year. If she orders 40 softballs, how many softballs can she expect to lose during the year?
*Friday, December 19, 2014 at 10:35am*

**math**

One day,20% of the 950 students at West Junior High were absent. How many students were absent? Is this right? 20/100 950/5 equals 190
*Friday, December 19, 2014 at 9:28am*

**math**

Larry's radio controlled car can reach a too speed of 3 meters per second. If his car travels at a top speed of 1 minute and 25 seconds, how far will it go?
*Friday, December 19, 2014 at 9:06am*

**math **

Kevin had $100.00. He spent half of his money at the video game store. Then he spent half of the money he had left at the music store. How much money did Kevin spend at the video game and music stores?
*Friday, December 19, 2014 at 7:42am*

**math**

A cylindrical bale of hay has a height of five feet and a diameter of 5 feet what is the approximate volume to the nearest cube
*Friday, December 19, 2014 at 6:55am*

**math**

John sells a $2,015,000 home and receives a 2.5% commission. How much is Johns commission? Do I have the problem set up right? $2,015,000 * 0.975
*Friday, December 19, 2014 at 5:27am*

**math**

alpha+beta=22/7/2 and sin alpha=1/3 then what is sin beta
*Friday, December 19, 2014 at 4:17am*

**math**

The ratio of the monthly incomes of A and B is 3:4. The ratio of monthly expenditures of A and B is 4:5. Which of the below is a possible value of the ratio of their savings? 9:10 3:4 13:20 4:5 How to form a equation for solving this?
*Friday, December 19, 2014 at 3:25am*

**math**

Is { cos (a) + sin (b)} * { cos (a) + sin (b)}=1+ 2*cos (a)*cos (b)
*Friday, December 19, 2014 at 3:19am*

**math**

alpha+beta=22/7/2 and sin alpha=1/3 then what is sinbeta
*Friday, December 19, 2014 at 3:01am*

**Math**

Use differential, (i.e. linear approximation), to approximate cube root of 64.1 as follows: Let f(x) = cube root of x. The linear approximation to f(x) at x = 64 can be written in the form y = mx+b. Compute m and b and find cube root of 64.2 via linear approximation
*Friday, December 19, 2014 at 2:52am*

**Math**

The circumference of a sphere was measured to be 89.000 cm with a possible error of 0.50000 cm. A. Use linear approximation to estimate the maximum error in the calculated surface area. B. Estimate the relative error in the calculated surface area.
*Friday, December 19, 2014 at 2:51am*

**Math**

Use linear approximation, i.e. the tangent line, to approximate cube root of 27.05 as follows. Let f(x) = cube root of x and find the equation of the tangent line to f(x) at x = 27 in the form y = mx+b. Note: The values of m and b are rational numbers which can be computed by ...
*Friday, December 19, 2014 at 2:48am*

**Math**

The circumference of a sphere was measured to be 89.000 cm with a possible error of 0.50000 cm. A. Use linear approximation to estimate the maximum error in the calculated surface area. B. Estimate the relative error in the calculated surface area.
*Friday, December 19, 2014 at 2:42am*

**math**

how does this work?
*Friday, December 19, 2014 at 2:19am*

**Math**

Two numbers-- Their greatest common factor is 3. Their least common multiple is 90. How many answers are possible? Explain.
*Friday, December 19, 2014 at 12:59am*

**math**

The ratio of the monthly incomes of A and B is 4:3 . The ratio of their monthly expenditures is 5:4 . If A saves one fourth of his monthly income, find the ratio of their monthly savings. Help me solving this please!!
*Friday, December 19, 2014 at 12:26am*

**math**

If my input is 24 and my output is 8 what is my rule
*Thursday, December 18, 2014 at 11:35pm*

**math**

Please solve the system with the elimination method. Explain each step as it is performed. 5y = x 2x - 3y = 7 Would the elimination method have been your first choice to solve this problem?
*Thursday, December 18, 2014 at 10:07pm*

**Algebra math**

The height H and beat of a ball after T seconds is given by H equals 80t team take away 16x2. how long did it take for the bout to hit the ground
*Thursday, December 18, 2014 at 9:45pm*

**math**

w=80rmp r=2ft what is v=ft/min
*Thursday, December 18, 2014 at 9:34pm*

**math**

So i have this project and i need help on it. It says ....As your 8th grade graduation approaches,your parents decide to begin planning for your graduation party.Your parents have asked for your help in deciding which companies will be the better deal for them to use since you...
*Thursday, December 18, 2014 at 9:32pm*

**math**

So i have this project and i need help on it. It says ....As your 8th grade graduation approaches,your parents decide to begin planning for your graduation party.Your parents have asked for your help in deciding which companies will be the better deal for them to use since you...
*Thursday, December 18, 2014 at 9:13pm*

**math **

A punch recipe calls for 2/3 of pint juice to one pint soda, What is ratio of soda to juice?
*Thursday, December 18, 2014 at 9:08pm*

**math**

There are 27,878,400 square feet in one square mile. How many square feet are there in 35 square miles? Estimate by rounding the number of square feet in one square mile to the nearest ten million and the number of square miles to the nearest ten. Also find the exact answer
*Thursday, December 18, 2014 at 9:04pm*

**math**

what is the value of x given the perimeter is 76, the length is 3x -6 and the width is x.
*Thursday, December 18, 2014 at 8:54pm*

**Math**

The denominator of a fraction is one more then the numerator. If 2 were added to both the numerator and denominator, the new fraction equals 4/5. Find the original fraction.
*Thursday, December 18, 2014 at 7:55pm*

**Math**

What is a real world problem that compares the ratios 5 to 9 and 12 to 15.
*Thursday, December 18, 2014 at 7:25pm*

**math**

A scientist is mixing a chemical solution for an experiment. The solution contains 3/8oz of chemical and 1/6 ounce saline solution. What is the rate of chemical to saline?
*Thursday, December 18, 2014 at 7:10pm*

**math**

A recipe calls for 4 part club soda to 3 part juice, how much juice is needed for 32 Oz of club soda?
*Thursday, December 18, 2014 at 6:31pm*

**Math**

Lindsay bought six cds at the mall: the original price was $13 each but she got a discount, and only paid a total of $58.50 for all six. what was the discount
*Thursday, December 18, 2014 at 5:50pm*

**math**

A company will need 55,000 for a new addition. To meet this goal the company deposits money in an account today that pays 5% interest annual compound quarterly. to meet this goal in five years what would the company need to deposit today?
*Thursday, December 18, 2014 at 5:45pm*

**math**

oder these fractions and decimals from great to the 0.5,2/3,0.25,5/6,1/8
*Thursday, December 18, 2014 at 4:49pm*

**math**

how do you rewrite the problem so the divisor is a whole number 48.4 (division sign)0.4 8.19 (division sign)0.09 3.7 (division sign) 2.1 2.39 (division sign) 0.05 45.218(division sign)0.23 233.58(division sign)10.2
*Thursday, December 18, 2014 at 4:39pm*

**Math help**

A boy has 380 prize tickets he wants to exchange for action figures at a prize booth. At this prize booth 5 tickets can be exchanged for a large action figure, and 7 tickets can be exchanged for 2 small action figures. The boy wants 4 times as many small action figures as ...
*Thursday, December 18, 2014 at 3:55pm*

**math**

On April 12, Michelle Lizaro borrowed $5,000 from her credit union at 9% for 80 days. The credit union uses the ordinary interest method. a. What is the amount of interest on the loan? $ b. What is the maturity value of the loan? $ c. What is the maturity date of the loan? ...
*Thursday, December 18, 2014 at 3:46pm*

**math **

1.During the soccer season, Michelle attempted 130 goals and made about 70% of them. a. How many goals did Michelle make? b. The team made a total of 456 goals. What percent of the teams made goals did Michelle make? 1. 13 goals; 2.85% 2. 39 goals; 85.5% 3. 91 goals; 19.96% 4....
*Thursday, December 18, 2014 at 3:42pm*

**math**

If ten crates arrive at the receiving dock, and each crate contains 7 boxes of decorative vases with 12 vases per box; how many vases are in each crate?*
*Thursday, December 18, 2014 at 3:32pm*

**Math**

She deposits $5 or $3.50 into her account. She made 14 deposits which equaled $59.50. how many times did she deposit $5 & how many times did she deposit $3.50 - I don't know how to do this!
*Thursday, December 18, 2014 at 2:44pm*

**Math **

What is the equation of the line that has a slope of 0 and passes through the point (6, -8) A. x=6 B. y=6 C. x=-8 D. y=-8
*Thursday, December 18, 2014 at 1:32pm*

**math**

If Susan takes two tests and makes a makes a 54/100 on the first test and a 63/100 on the second test, and is given a third test and makes an 80/100(which can only count as 20% of her total grade for all three test, what is her final grade/score.
*Thursday, December 18, 2014 at 1:14pm*

**business math**

toby signed a simple discount promissory note for $20,000. the discount rate is 8.5%, and the term of the note is 90 days. what are toby's proceeds on the loan?
*Thursday, December 18, 2014 at 12:57pm*

**math**

A taco stand sells tacos for $3.25 each. The stand’s expenses for the day are $210. Define your variables and write an inequality to represent the amount of tacos they need to sell per day to make a profit, and then solve the inequality. Provide your conclusion as a ...
*Thursday, December 18, 2014 at 12:53pm*

**Math**

During the soccer season, richard attempted 80 goals and made about 65% of them. a. How many goals did Richard make? b. The team made a total of 327 goals. What percent of the team's made goals did Richard make?
*Thursday, December 18, 2014 at 12:50pm*

**Math**

Simplify each expression and state any non-permissible values. (4 marks - show your work) 4x-1 divided by x^2+7x+12 divided by 2x-1 divided by x^2 +x- 12 is the expression Help me please and thank you.
*Thursday, December 18, 2014 at 12:39pm*

**Math**

Simplify each expression and state any non-permissible values. (4 marks - show your work) x^2-2x divided by x+1 multiplied by x^2-1 divided by x^2+x-6 is the expression
*Thursday, December 18, 2014 at 12:35pm*

**math**

* not multiple choice* 2/3n = 8 solving the system of equations 4x + 3y = 13 y= -x +4 * not sure how to do this the slope intercept form of the function that contains the point (-3, 2) and has a slope of -2? my answer: y= -2x + 6 -1 + 5(6-y) my answer is -y + 29
*Thursday, December 18, 2014 at 11:08am*

**math**

I'm trying to help my son with his homework and I have been out of school for some time...the question is: The floor of the recreation room at the YMCA is triangular with a base of 20 meters and a height of 13 meters. The YMCA wants to install carpeting that costs $30 per ...
*Thursday, December 18, 2014 at 11:07am*

**math**

Which ratio compares 15m to 45cm?
*Thursday, December 18, 2014 at 10:36am*

**Math**

The cost of staying at a hotel can be found using the function y = 129x + 9.95, where x is the number of days a guest stays at the hotel and y is the cost in dollars. The cost includes a flat fee for Internet access. If the fee for Internet access is not included, which ...
*Thursday, December 18, 2014 at 9:54am*

**math algebra**

Mauryn wrote the following Sandwiches at king sandwich cost same amount and include bread, meat, cheese, lettuce, and tomato. All other veggies are extra. Sam bought a chicken sandwich with 3 extra veggies for $5.25. Erin bought roast beef sandwich with 5 extra veggies for $6....
*Thursday, December 18, 2014 at 9:05am*

**math algebra**

The length of the diagonal across the front of a rectangular box is 25 inches, and the length of the diagonal across the side of the box is 20 inches. The length of a 3 dimensional diagonal of the box is 28 inches. What is length of the diagonal across the top of box? A. 15.5 ...
*Thursday, December 18, 2014 at 8:58am*

**math algebra**

What is slope of line 8y = -16? a. 0 b. 2 c. 16 d. undefined dont have a clue how to do this
*Thursday, December 18, 2014 at 8:48am*

**Math**

in the woods is a cellular tower that is 72 feet tall and has a 60 foot shadow. next to it is a tree with a 40 foot shadow. how tall is the tree
*Thursday, December 18, 2014 at 8:47am*

**math algebra**

What is y intercept of equation represented: X Y 150 1047 125 872 100 697 75 522 a. -3 b. 0 c. 3 d. 172 I come up with totally different answers than these. Do you use the y2-y1/×2-×1 ?
*Thursday, December 18, 2014 at 8:46am*

**math**

A tank is 1/4 filled of water.when 90 liters of water are pumped into it the tank becomes 3/4 full.how much water in liters does the tank hold?
*Thursday, December 18, 2014 at 6:37am*

**math**

math question from applications of the derivatives. maths formula: V = 4/3(pi)r^3 dV = 4(pi)(3r^2) = 4(pi)r^2 But I don't understanding that how to get (3r^2) ?
*Thursday, December 18, 2014 at 6:26am*

**math solution on algebra**

If one side of equilateral triangle is 2 cm then find the area of this triangle
*Thursday, December 18, 2014 at 2:42am*

**Math**

Let y = sqrt(7-x) Find the differential dy when x= 1 and dx = 0.4 Find the differential dy when x= 1 and dx = 0.02
*Thursday, December 18, 2014 at 1:32am*

**math**

6 eggs $1.00 12 eggs $2.00 18 eggs $3.00 What is the constant proportionality that relates the price to the quantity of eggs?
*Thursday, December 18, 2014 at 1:06am*

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