Tuesday

March 3, 2015

March 3, 2015

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**Math**

Question: 1/2(x+3) + 5x = 2 - 4/3 (1-2x) My work: 5 1/2x + 3/2 = 2/3 + 8/3x 33x + 9 = 4 + 16x 17x = -5 x = -17/5 Did I do this correctly?
*Saturday, February 21, 2015 at 7:06pm*

**math**

how can find sum (x) from x=1 to x=n
*Saturday, February 21, 2015 at 7:05pm*

**Math**

A video game that originally costs $68 is on sale at a 15% discount. What is your final cost of the video game If there is a 5% sales tax?
*Saturday, February 21, 2015 at 6:57pm*

**Math**

Find the slope of the line L1 given that L1 is perpendicular to L2 and L2 passes through (-3,-1) and (-5,7). How do you do this kind of problem
*Saturday, February 21, 2015 at 6:55pm*

**Math**

The fifth term of an arithmetic sequence is 22 and the 15th term is 62. Find the 100th term and the sum of the first 60 terms. I'm having trouble figuring out how to do this.
*Saturday, February 21, 2015 at 6:51pm*

**Math**

The line that passes through (4,3r) and (2+r,-6) is perpendicular to the line with equation 5x+3y+12=0. find r.
*Saturday, February 21, 2015 at 6:49pm*

**Math**

Find the point of intersection on the graphs of 2x+5y=15 and x-3y=6 How do I do this?
*Saturday, February 21, 2015 at 6:47pm*

**Math**

Flying to the wind, an airplane takes 4 hours to go 960 km. The same plane flying with the wind takes only 3 hours to make the same trip. Find the speed of the plane and the speed of the wind. I wasnt here for the lesson from my teacher but told me to ask my classmates but ...
*Saturday, February 21, 2015 at 5:48pm*

**Math**

The regular price of a sweater is $32. For a sale, the price of the sweater is marked down 30%. What is the price of the sweater?
*Saturday, February 21, 2015 at 5:08pm*

**Math**

Put 25 marbles into 3 piles, each has an odd # of marbles. How many ways can you do this??? Do you have the formula?
*Saturday, February 21, 2015 at 4:52pm*

**math concept**

Sarah understands that if there are 11 ones, the first 10 move over to the tens column as one unit (i.e., one group of 10). What concept does this understanding represent? A. Renaming B. Regrouping C. Borrowing D. Place value my answer is a
*Saturday, February 21, 2015 at 4:51pm*

**Math**

Evaluate 6 log2 ∛64 +10log3 (243)^1/5)
*Saturday, February 21, 2015 at 4:50pm*

**Math**

How many times larger is the area of a square (Length of Sides = A) than the area of an equilateral triangle (Length of Sides = 0.5A)?
*Saturday, February 21, 2015 at 4:34pm*

**math**

A man who can swim at 5km/h in still water swims towards the east to cross arriver. If the river flows from north to south at the rate of 3km/h a) Calculate: i) The resultant speed ii) The drift b) If the width of the river is 30m, find the time taken, in seconds, for the man ...
*Saturday, February 21, 2015 at 4:26pm*

**Math**

the sum of the integers from 1 to 10, inclusive, is 55. What is the sum of the multiples of 5 from 5 to 50 inclusive? Which equation would I use?
*Saturday, February 21, 2015 at 3:52pm*

**math**

The length and breadth of a rectangular paper were measured to be the nearest centimeter and found to be 18 cm and 12 cm respectively. Find the percentage error in its perimeter.
*Saturday, February 21, 2015 at 3:51pm*

**math**

please help on this problem. -2x+4(3x-4)=84. cant get the answer. thank you
*Saturday, February 21, 2015 at 3:19pm*

**Math**

determine the point of intersection for this pair. y=-3x-2 and 2x+3y=5
*Saturday, February 21, 2015 at 3:04pm*

**Business math**

Compute the difference between the ordinary interest and the exact interest for a loan with a principle amount of $1100 at 12 percent for 120 days. I'm getting $0.60 Can you check my work?
*Saturday, February 21, 2015 at 1:06pm*

**Business math**

The clarkdell school system has three schools. School #1 has 500 students School #2 has 600 students School #3 has 400 students What part of a $15,000 allocation will go to school #2? 15,000 divide by 3= $5,000 Will you check my answer?
*Saturday, February 21, 2015 at 12:50pm*

**business math**

Compute the total amount to be repaidon a $1920 loan at 8% for 135 days. Base your calculation on exact interest(365-day year). I'm getting $2335.29. Can you check my work?
*Saturday, February 21, 2015 at 12:31pm*

**Math**

an adult manatee eats approximately 100 pounds of aquatic food per day. write an equation to find p, the numbeer of ponds of food an adult manatee eat in d days
*Saturday, February 21, 2015 at 11:41am*

**Math**

An adult polar bear walks at an average rate of 5 kilometers per hour. 1. write an equation to find k, the number of kilometers a polar bear bear can walk in h hours. 2.make a table to show the relationship between the number of kilometers k a polar bear can walk and the ...
*Saturday, February 21, 2015 at 11:36am*

**math**

A vector can be used to represent the path of a drill tip used to bore a deep mine shaft in Sudbury one quarter of the way to the centre of the Earth. Represent the vector using a directed line segment and Cartesian co-ordinates and describe which representation may be more ...
*Saturday, February 21, 2015 at 11:30am*

**math**

Amanda's punch recipe : 7 parts mixed fruit juice, 2 parts of lemonade [Question : how much lemonade will she need to make 180 fluid ounces of punch ?]A .140 Fluid ounces or B. 40 Fluid ounces C. 36 Fluid ounces D. 60 Fluid ounces i think the answer is b am i right
*Saturday, February 21, 2015 at 9:33am*

**math**

A trough (a place where horses and sheep drink water) has the shape of a half-cylinder with length 4 m and radius 20 cm. Water is poured into the trough at a constant rate of 300 cm3/s. At what rate (in cm/s) is the level of the water in the trough rising at the moment the ...
*Saturday, February 21, 2015 at 6:31am*

**math**

A wire of length 4 m is cut in two parts and the first part is bent in the shape of a square, while the second part is bent in the shape of an equilateral triangle. For which lengths of these parts the total area enclosed by the square and the triangle is: a. minimized? b. ...
*Saturday, February 21, 2015 at 6:06am*

**math**

Jill, Meg, and Beth are sisters. Jill is 2 years younger than Meg. Beth is half as old as Meg. Use the same variable to write three algebraic expressions based on this situation. Tell what the variable represents and what each expression represents. THANK YOU!
*Saturday, February 21, 2015 at 3:41am*

**math**

A group of people planned to contribute equally towards a water project which needed Ksh 200,000 to complete, however, 40 members of the group without from the project. As a result, each of the remaining members was to contribute Kshs 2,500. (a) Find the origina number of ...
*Saturday, February 21, 2015 at 2:45am*

**math**

The distance between towns M and N is 280 km. A car and a lorry travel from M to N. The average speed of the lorry is 20 km/h less than that of the car. The lorry takes 1 h 10 min more than the car to travel from M and N. (a) If the speed of the lorry is x km/h, find x (b) ...
*Saturday, February 21, 2015 at 2:10am*

**math**

Pharmacy Goods has a total of $423,400 sales. Beginning inventory total cost was $105,850 and ending total cost was $127,020. What is the turnover rate?
*Saturday, February 21, 2015 at 2:04am*

**Math**

An aeroplane is taking off from landing field has to run 500 metres.it leaves the ground in 10 seconds.what is the acceleration?
*Saturday, February 21, 2015 at 1:16am*

**math**

Velocity V ms, of a moving body at time t seconds is given by V = 5t2 -12t + 7
*Friday, February 20, 2015 at 9:00pm*

**Math**

A roll of paper towels is 10 inches high and 2.5 inches in diameter. How many full squares inches of paper towel can fit on the roll in 15 rotation? * all I need is a formula of this question. Do I use lateral surface area formula or total surface area formula
*Friday, February 20, 2015 at 8:44pm*

**math**

A triangular plot ABC is such that AB = 36m, BC = 40m and AC = 42 m a) Calculate the: i) Area of the plot in square meters √(s(s-a)(s-b)(s-c)) How to find S?
*Friday, February 20, 2015 at 8:09pm*

**math **

There were 15.37 million licensed drivers in Texas in 2009 and 14.54 million in 2004. Find a formula for the number, N, of licensed drivers in the US as a function of t, the number of years since 2004, assuming growth is (a) Linear N(t)= million drivers (b) Exponential N(t)= ...
*Friday, February 20, 2015 at 7:34pm*

**Math/algebra**

i'm dividing 52 glass bears into groups she has 1 left over how many groups thanks ella
*Friday, February 20, 2015 at 6:47pm*

**math**

Three people Fatuma, Ali and Hassan contributed money to start a business.Fatuma contributed a quarter of the total amount and Ali two fifths of the remainder. Hassan’s contribution was one and a half times that of Fatuma. They borrowed the rest of the money from the bank...
*Friday, February 20, 2015 at 5:33pm*

**math**

Given that sinθ = 2/3 and is an acute angle. Find: Tanθ giving your answer in surd form θ = tan^(-1)〖(2/√5)= 41.81°〗 Sec^22 θ θ= cos^(-1)〖(3/√5ӏ1;)=
*Friday, February 20, 2015 at 5:05pm*

**math**

solve d^3y/dx^3+4d^2y/dx^2+4dy/dx=exp(-2x)
*Friday, February 20, 2015 at 4:54pm*

**Math**

Mrs. Monk is wrapping presents . If a roll and a half wraps 5 gifts, if there are 9 same sized presents, how many rolls of paper are needed?
*Friday, February 20, 2015 at 4:49pm*

**math**

solve d^3y/dx^3-3d^2y/dx^2+2dy/dx=exp(2x)
*Friday, February 20, 2015 at 4:02pm*

**Math **

Hi! So I asked about this question earlier and I've been trying to solve it with the directions I was given by someone before, but, I'm still confused and keep getting weird numbers. Can someone help me with this? Directions: Find the angle, θ, between the vectors...
*Friday, February 20, 2015 at 3:58pm*

**math.help pls**

A line segment with endpoints A(–4, 3, 2) and B(5, –6, –1) is translated first 2 units back, 3 units right, and 1 unit up. The image is then translated 7 units to the left. What are the coordinates of B´? A: (3, 4, 0) B: (3, –10, 0) C: (5, –6, &#...
*Friday, February 20, 2015 at 3:01pm*

**Math Plz help**

A theoretical probability distribution shows the probabilities of all the outcomes except for one. If the total of the shown outcomes is 0.5, then the probability of the missing outcome must be A.) 0.25 B.) 0.2 C.) 0.75 D.) 0.5
*Friday, February 20, 2015 at 2:48pm*

**Math Help**

Hi! I'm really confused on how to do this. Can someone help me? Thanks a bunch! Directions: Use the vectors u = <2, 2>, v = <-3, 4> and w = <1, -2> to find the indicated quantity. a. 3u ∙ v b. (u ∙ 2v)w
*Friday, February 20, 2015 at 2:05pm*

**math**

The length and breadth of a rectangular floor were measured and found to be 4.1 m and 2.2 m respectively. If possible error of 0.01 m was made in each of the measurements, find the: (a) Maximum and minimum possible area of the floor (b) Maximum possible wastage in carpet ...
*Friday, February 20, 2015 at 2:05pm*

**Math**

Please help me and show an understanding please, so I see how to figure them out. Lee deposited $28,000 in an interest-bearing checking account that earns 3.5% interest compounded daily. Find the amount after 68 days. a.$183.16 b.$28,180.46 c.$28,183.16 d.$180.46 On April 10th...
*Friday, February 20, 2015 at 1:52pm*

**math**

Cecily Made a poster in the shape of a quadrilateral. All the angles and sides of the poster are congruent. Which of the following names the shape of Cecily's poster Square (a) rectangle (b) pentagon (C) trapezoid (D)
*Friday, February 20, 2015 at 12:48pm*

**Math**

You roll a number cube and get a one 7 times, a two 8 times, a three 5 times, a four 9 times, a five 8 times, and a six 5 times. What is the experimental probability of rolling an odd number?
*Friday, February 20, 2015 at 12:12pm*

**Math**

A spinner is split up into 4 colored areas of the same size: red, blue, green, and yellow. What is the theoretical probability of the spinner landing on one of these four colors?
*Friday, February 20, 2015 at 11:47am*

**math please help**

Dose anyone have ideas for a bedroom using this list? The layout must include the symmetrical placement of two items in the bedroom. Label two acute, two right, and two obtuse angles in the bedroom. Label at least ten different polygons in the bedroom. Be sure to include both ...
*Friday, February 20, 2015 at 11:21am*

**Math**

What is a “real” zero? 1. A solution to a polynomial. 2. A non-imaginary number. 3.An x-intercept of a polynomial. 4. All of the above. The answer is 4, right?
*Friday, February 20, 2015 at 10:58am*

**math**

6+x= 12 i got 2??? is this right
*Friday, February 20, 2015 at 10:06am*

**math**

about powers and roots
*Friday, February 20, 2015 at 9:56am*

**Math**

Mrs monk rented a truck for 3 days. Enterprise charged her $40. per day plus $.25 per miles. The total charge was $142.75. How many miles did she drive the truck? (1) 411 miles (2) 91 miles (3) 251 miles (4) 571 miles
*Friday, February 20, 2015 at 9:52am*

**Math**

Mr. lim bought an equal number of red and yellow tulips. He gave away 24 red tulips. Then tere were4 times as many yellow tulips. How mani tulips did he buy? Anna is 14 kg heavier than lily. Sharon is 8 kg lighter than Bona. If lili weights 48 kg, find the total mass of sharon...
*Friday, February 20, 2015 at 8:49am*

**Math**

How do you find the angle, θ, between the vectors? If needed, round your answer to the nearest tenth. 1.) u = 2i - 3j v = i - 2j 2.) u = <3, 2> v = <4, 0>
*Friday, February 20, 2015 at 8:36am*

**Math**

Hi! Can someone help me with these? Thanks a bunch! :) 1.) Find the dot product. <0, 3> ∙ <4, -2> 2.) Find the dot product of u and v. u = <-4, 1> v = <2, -3>
*Friday, February 20, 2015 at 7:50am*

**math**

Consider the sequence t0 = 3, t1 = 3^3, t2 = 3^3^3 , t3 = 3^3^3^3,….. , defined by t0 = 3 and tn+1 = 3tn for n ≥ 0. What are the last 2 digits of t3 = 3^3^3^3 ? Show that the last 10 digits of tk are the same for all k ≥ 10
*Friday, February 20, 2015 at 7:39am*

**math**

Two teachers are chosen randomly from a staff consisting 3 women and 2 men to attend a HIV/AIDS seminar. Calculate the probability that the two teachers chosen are: (a) Of the same sex (b) Of opposite sex
*Friday, February 20, 2015 at 1:22am*

**math**

A line L1 passes through point (1, 2) and has gradient of 5. Another line L2, is perpendicular to L2 and meets it at a point where x = 4. Find the equation for L2 in the form of y = mx + c
*Friday, February 20, 2015 at 1:19am*

**math**

you mean: if a sing is 2.5 in height and.2.5. in width will the area of the sign be greater than or less than 2.5 square feet Search Results Questions on Word Proble
*Friday, February 20, 2015 at 12:48am*

**Math **

Mrs. Monk rented a truck for 3 days. Enterprise charged her $ 40 per day plus $0.25 per miles. The total charge was $142.75. How many miles did she drive the truck?
*Friday, February 20, 2015 at 12:37am*

**math(5th grade)**

A poor farmer is going to market with his faithful hungry dog, two plump geese to sell, and three bags of corn. The farmer knows that unless he is right there, the dog will eat a goose or a goose will eat some corn. Traveling carefully, he avoids trouble until he comes to a ...
*Friday, February 20, 2015 at 12:24am*

**Math**

Using an experimental probability is just as accurate as using the theoretical probability. True or False?
*Friday, February 20, 2015 at 12:20am*

**math**

A pyramid has a height of 5 in. and a surface area of 90 in ^2. Find the surface area of a similar pyramid with a height of 10 in. Round to the nearest tenth, if necessary. A.360 in. ^2 B.180 in. ^2 C.22.5 in. ^2 D.3.6 in. ^2 I think the answer is A but I don't know how to...
*Friday, February 20, 2015 at 12:18am*

**Math**

There are 4150 dogs in animal shelters in a particular state. A sample of 100 dogs is taken and 7 of those dogs are white. How many dogs in all the shelters are white?
*Friday, February 20, 2015 at 12:13am*

**Math**

If a sample of 100 cars has 87 with grey interiors, how many in a second sample of 220 cars should have grey interiors?
*Friday, February 20, 2015 at 12:11am*

**Math**

A sample of 50 children had one child that is left-handed. If there are 750 children in a school, how many should be left-handed?
*Friday, February 20, 2015 at 12:09am*

**Math**

If we know the number of black cats in a town, we can use the experimental probability to find out how many black dogs there are. True or False?
*Friday, February 20, 2015 at 12:09am*

**Math**

A standard deck of cards contains 52 cards. Of these cards there are 13 of each type of suit (hearts, spades, clubs, diamonds) and 4 of each type of rank (A – K). Four cards are pulled in order from this deck of 52 playing cards. What is the probability that the cards ...
*Thursday, February 19, 2015 at 11:52pm*

**Math**

A square piece of paper is folded in half to make a rectangle. The perimeter of the rectangle is 24.9 cm. What is the side length of the square piece of paper?
*Thursday, February 19, 2015 at 11:47pm*

**Math**

A rectangular prism has a width of 92 ft and a volume of 240 ft^3. Find the volume of a similar prism with a width of 23 ft. Round to the nearest tenth, it necessary. I know the answer is 3.8 feet because I got it wrong. But why is that the answer. If you cab please help me ...
*Thursday, February 19, 2015 at 11:43pm*

**Math (Probability)**

A standard deck of cards contains 52 cards. Of these cards there are 13 of each type of suit (hearts, spades, clubs, diamonds) and 4 of each type of rank (A – K). Two cards are pulled in order, without replacement from this deck of 52 playing cards. What is the ...
*Thursday, February 19, 2015 at 11:32pm*

**math**

Please check 6 more than a number n 6(n)+9 A number m multiplied by 7 7xm 9 less than a number w 9-w The sum of a number a and 9 9+a A number k minus 7 K-7 5 times a number h,plus 12 5*h + 12 5 increased by a number g 5+g
*Thursday, February 19, 2015 at 10:38pm*

**math**

A bucket of paint holds 3 1/2 gallons of paint. Marci uses 2/3 of a bucket of paint. How many gallons of paint does she use?
*Thursday, February 19, 2015 at 10:31pm*

**math**

Greg bought four greeting cards,all the same price, and. A package of wrapping paper for $1.79. He spent a total of $5.29. How much was greeting card.
*Thursday, February 19, 2015 at 10:29pm*

**math**

x + 3 + 2X =X+3 can someone help with this?
*Thursday, February 19, 2015 at 10:12pm*

**math**

Emma os using connecting cubes to make a rectangular model with a height of one connecting cube. With her cubes she can make the model in exactly 3 different ways. If Emma has more than 12 but fewer than 17 cubes how many cubes does she have
*Thursday, February 19, 2015 at 10:01pm*

**Math**

840 stickers were given to 42 children. ⅔ of the children were boys, and each of them received the same number of stickers. Each girl received twice as many stickers as each boy. How many stickers did each girl receive? Explain how you got your answer. Sorry I posted ...
*Thursday, February 19, 2015 at 9:44pm*

**MAth**

840 stickers were given to 42 children. ⅔ of the children were boys, and each of them received the same number of stickers. Each girl received twice as many stickers as each boy. How many stickers did each girl receive? Explain how you got your answer.
*Thursday, February 19, 2015 at 9:32pm*

**math**

A cylinder is rolled three complete revolutions to create a rectangular shape 32 inches long and 12 inches wide. Write an expression for the area of the rectangle in terms of the diameter of the cylinder. Show how you could use this expression to find a formula for the surface...
*Thursday, February 19, 2015 at 8:46pm*

**Math**

The movie mike watched lasted 1 hour 26 minutes.how many minutes did the movie last?
*Thursday, February 19, 2015 at 8:45pm*

**math**

a 10 foot ladder is leaning againts a wall the base of the ladder is 2 feet from the base of the building, how far up the building does the ladder fall?
*Thursday, February 19, 2015 at 8:01pm*

**inequalities (math)**

write an inequality for this sentence the roller coaster is less than 3 minutes
*Thursday, February 19, 2015 at 7:55pm*

**math**

There is a slide in the park that is 18 feet long. The ladder to the top of the slide is 7.5 feet long. If the ladder and the slide are perpendicular, what is d, the distance from the top of the slide to the ground? If necessary, round to the nearest tenth
*Thursday, February 19, 2015 at 7:45pm*

**Math**

kristen has saved $20 in cash to spend at the mall.if she has 8 bills, how many of each kind of bill does she have?
*Thursday, February 19, 2015 at 7:42pm*

**Math **

If Javier bought 48 sports cards and 3/8 are baseball cards. How many are baseball cards
*Thursday, February 19, 2015 at 7:33pm*

**Math**

How do you go about solving this? If you got paid $15 for 3 hours of work one day and $45 for 8 hours of work on another day, find your hourly rate of pay for the 2 days
*Thursday, February 19, 2015 at 7:31pm*

**Math**

Tell whether the difference between the two integers is always, sometimes, or never positive. 1)Two positive integers. Never 2)Two negative integers. Sometimes. 3)A positive integer and a negative integer. Sometimes. 4)A negative integer and positive integer. Sometimes. Is ...
*Thursday, February 19, 2015 at 7:29pm*

**math**

cody has five coins that total $1.10. what are the coins?
*Thursday, February 19, 2015 at 7:26pm*

**Math**

q. Scott has different chores depending on the season. During the 5 warm months he mows the lawn, which takes about 1 in a half each week. During the 7 cold months, he shovels the snow when needed. This winter he shoveled show for total of 6 hours. How many chores did he do ...
*Thursday, February 19, 2015 at 7:22pm*

**math **

explain comparing fractions 21/25?
*Thursday, February 19, 2015 at 7:03pm*

**Math**

Posted by Marissa on Thursday, February 19, 2015 at 6:32pm. I am having difficulties trying to do rational expressions. I have to use the words Domain, Excluded Value, Set, Factor, and Real Numbers to show how I got the answer. Can someone please help me solve this one? g^2-6g...
*Thursday, February 19, 2015 at 6:58pm*

**math**

If 3000 dollars is invested in a bank account at an interest rate of 9 per cent per year, find the amount in the bank after 5 years if interest is compounded annually
*Thursday, February 19, 2015 at 6:35pm*

**Math 222**

I am having difficulties trying to do rational expressions. I have to use the words Domain, Excluded Value, Set, Factor, and Real Numbers to show how I got the answer. Can someone please help me solve this one? g^2-6g-55 ___________ g
*Thursday, February 19, 2015 at 6:32pm*

**math**

a recipe calls for 2/3 cup of flour i am making a amount that is 3/7 of the recipe how much flour do i need
*Thursday, February 19, 2015 at 6:28pm*

**Math**

In the formula d = rt, the time t varies inversely with the rate r. A student running at 5 miles per hour runs one lap around the school campus in 8 minutes. If a second student takes 10 minutes to run one lap around the school, how fast is she running?
*Thursday, February 19, 2015 at 6:19pm*

**Math**

List the numbers in least to greatest: 1/2,0.4,30%
*Thursday, February 19, 2015 at 6:13pm*

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