Friday

March 27, 2015

March 27, 2015

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**math**

When it is assembled, a flute is 28 inches long. The middle piece m is 5 inches less than twice as long as the first piece f. The last piece l is two-thirds as long as the first piece. Find the length of each piece of the flute
*Wednesday, March 4, 2015 at 4:07pm*

**math**

A number of circles touch each ather. The area of the smallest circle is 4n cm^2 and each consecutive circle has area 9/4 times that of the previous one. If the distance AB=665/8. Line AB passes at the centre of the circles. How many circles are there?
*Wednesday, March 4, 2015 at 3:33pm*

**Statistics Help**

Express the confidence interval (0.024, 0.112) in the form of p-hat – E < p < p-hat + E = __< p < __ I don't understand how to perform this formula. Please help I am about to graduate and this is my last class, and I am struggling as I only know basic Math...
*Wednesday, March 4, 2015 at 3:18pm*

** Math**

Can someone please help. How log will it take you to save $100,000 if you start saving 1597 every 3 months starting today? Assume and interest rate of 6% compounded quarterly. Business Calculator py/cy= 4 I=6% fv= 100,000 1597= PMT BGN is on
*Wednesday, March 4, 2015 at 3:18pm*

**math**

how do you create of six values that does not represent a linear relation. All the y-values must increase in value as x increase in value?
*Wednesday, March 4, 2015 at 1:52pm*

**Math Check**

Are my answers correct? Tell whether the system is inconsistent OR dependent. 1.) -7x+6y=-4 14x-12y=8 2.) 3x-y=7 -6x+2y=8 My answers: 1.) inconsistent 2.) Dependent
*Wednesday, March 4, 2015 at 1:32pm*

**statistics/Help Please!!**

In a sample of seven cars, each car was tested for nitrogen-oxide emissions (in grams per mile) and the following results were obtained:0.18, 0.12, 0.05, 0.19, 0.18,0.13, 0.15. Assuming that this sample is representative of the cars in use, construct a 98% confidence interval ...
*Wednesday, March 4, 2015 at 1:10pm*

**math**

what is the function rule? x= -2, -1, 0, 1, 2 y= 9, 4, -1, -6, -11
*Wednesday, March 4, 2015 at 1:03pm*

**math**

develop an equation and a set of 5 ordered pairs for equation: 1. the amount a sales person earns is a flat rate plus commission. 2. the volume of fuel in a snowmobiles tank related the distance travelled. 3. the cost of a hotel room is a flat fee plus a fee per adult ...
*Wednesday, March 4, 2015 at 10:30am*

**math**

the first term of the arithmetic sequence is -37 and the second term is-30 what is the smallest positive term of the sequence?
*Wednesday, March 4, 2015 at 10:30am*

**math**

the first term of the arithmetic sequence is -37 and the second term is-39 what is the smallest positive term of the sequence?
*Wednesday, March 4, 2015 at 10:28am*

**math**

Find D Varation Of D Following Number 2,4,6,8,10,10,12
*Wednesday, March 4, 2015 at 9:11am*

**Math Help**

Are my answers correct? Tell whether the system is inconsistent OR dependent. 1.) -7x+6y=-4 14x-12y=8 2.) 3x-y=7 -6x+2y=8 My answers: 1.) inconsistent 2.) Dependent
*Wednesday, March 4, 2015 at 9:06am*

**Math Check**

Hi! Can someone check my answers? Thanks! Directions: Solve each system by using the elimination method. Make sure to write your answer in (x,y) form. 1.) 3x-5y=2 2x+5y=13 2.) 3x+11y=4 -2x-5y=9 My answers: 1.) (3,7/5) 2.) (-17,5)
*Wednesday, March 4, 2015 at 9:05am*

**math**

Is the only way to check if a set of vectors are linearly indep. is if the det does not equal 0? I have a problem where v1= [1;2;1;-1] v2=[0;2;1;1] v3=[3 1 0 2] but this creates a 3X4 matrix and you can't find the det of this. I am really confused! thanks :D
*Wednesday, March 4, 2015 at 8:53am*

**math**

f(x)=(2x-3) (gof)(x)=4x2-16x+18 g(x)...?
*Wednesday, March 4, 2015 at 8:34am*

**math**

Solve it... [ ] [ ] [ ] = 30 fill the brackets using below numbers ( 1, 3, 5, 7, 9, 11, 13,15 ) you can repeat the numbers... Please help me! Many more people unsucceed to solve it
*Wednesday, March 4, 2015 at 5:23am*

**math**

How many square on a chess board? How to find out it? Please explain....
*Wednesday, March 4, 2015 at 5:14am*

**math 11**

Paula lent Ned $1200 to help him pay for a mountain bike that he desperately wants. She charged him 8%/a simple interest, payable weekly. Ned paid back the loan plus interest, in equal payments over 20 weeks. a) How much interest will Ned have to pay? [2 marks] b) What will ...
*Wednesday, March 4, 2015 at 2:49am*

**math **

May Ling borrowed $2500.00 for vehicle repairs from her parents. She agreed to pay back the loan plus 7.5% simple interest on the $2500 added on in equal monthly payments over the next 6 months. a) How much interest will May Ling have to pay? [2 marks] Monthly rate = ...
*Wednesday, March 4, 2015 at 2:47am*

**3rd garde math**

seth bikes 3 miles in 10 minutes and 30 miles in 100 minutes. How many miles does seth bike in 1000 minutes
*Wednesday, March 4, 2015 at 2:46am*

**math**

rearrange the numbers in a 4 x 4 array so that each row column and diagonal equal 10 using numbers 1-4
*Wednesday, March 4, 2015 at 2:04am*

**Math**

What is the volume of a square glass window with a side length of 1 3/4 ft and a width of .08 ft?
*Wednesday, March 4, 2015 at 1:34am*

**math**

A number of circles touch each ather. The area of the smallest circle is 4picm2 and each consecutive circle has area 9/4 times that of the previous one. If the distance AB=665/8. Line AB passes at the centre of the circles. How many circles are there?
*Wednesday, March 4, 2015 at 12:13am*

**math**

An antique clock takes 5.5 seconds to chime at 3 o'clock. How long does it take to chime at 9 o'clock ? 5.5/2= 2.75x8=22seconds
*Wednesday, March 4, 2015 at 12:01am*

**math**

A number of circles touch each ather. The area of the smallest circle is 4picm2 and each consecutive circle has area 9/4 times that of the previous one. If the distance AB=665/8. Line AB passes at the centre of the circles. How many circles are there?
*Wednesday, March 4, 2015 at 12:01am*

**math **

How do I round this to the nearest ten thousand 1,112,433
*Tuesday, March 3, 2015 at 11:54pm*

**math**

Susie uses 1/2 to help compare 1/3 to 3/5 and to help in comparing 3/7 with 2/3. Explain how 1/2 help determine which fraction is greater in each combination.
*Tuesday, March 3, 2015 at 11:44pm*

**math**

five friends went to a baseball game. three of the friends each bought a ticket for x dollars and a soda for six dollars the other two friends each bough only tickets. write and simplify and expression that represent the amount of money spent
*Tuesday, March 3, 2015 at 11:28pm*

**math**

Tony plans to install a window pane that has a length of 8 inches and a width of 6 inches. He decides that the length has to be reduced by z inches. He says that the new area of the window pane will be 48−z. Is Tony correct? Why or why not? THANK YOU!!!!!
*Tuesday, March 3, 2015 at 10:58pm*

**math**

Janice plans to build a rectangular table top with an area of 60+20r square inches. The width of the table top is 10 inches. What is the length of the table top?. THANK YOU
*Tuesday, March 3, 2015 at 10:48pm*

**math**

Emma's school plans to build a rectangular basketball court with an area of 150+175t square feet. The length of the basketball court is 25 feet.What is the width of the basketball court? Thank you!
*Tuesday, March 3, 2015 at 10:42pm*

**math**

Emma's school plans to build a rectangular basketball court with an area of 150+175t square feet. The length of the basketball court is 25 feet as shown in the following diagram. Thank you!
*Tuesday, March 3, 2015 at 10:35pm*

**Math**

For the first of two basketball games the price of each reserved seat was $1.50,the price of each unreserved seat was 5 cents, and the number of reserved seats sold was 1/25 of the number of unreserved seats sold.If, at a second game, the price of the reserved seats is to be ...
*Tuesday, March 3, 2015 at 10:18pm*

**Math**

Come pleat the table to represent each part of the formula. The data values have been put in ascending order. ---- X, (X, - x) 2 30 ? 32 ? 33 35 49 50 50 71 73 77
*Tuesday, March 3, 2015 at 10:15pm*

**Math **

What is 8 3/4 - 5 5/6 = Is 24 the Denominator for this problem? Show all the work.
*Tuesday, March 3, 2015 at 10:03pm*

**math**

what percent of student perform at the national average. there are 32 kid
*Tuesday, March 3, 2015 at 9:36pm*

**math**

You need at least 5 pounds of potatoes and onions. Potatoes cost $4 per pound and onions cost $2 per pound. You can spend at most $18. a) define the variables b) a system of linear inequalities that represents this situation.
*Tuesday, March 3, 2015 at 9:34pm*

**Math Check**

Can someone check my answers? Thanks! Tell whether the system is inconsistent OR dependent. 1.) -7x+6y=-4 14x-12y=8 2.) 3x-y=7 -6x+2y=8 My answers: 1.) inconsistent 2.) Dependent
*Tuesday, March 3, 2015 at 8:51pm*

**Math**

Solve each system by using the elimination method. Make sure to write your answer in (x,y) form. 1.) 3x-5y=2 2x+5y=13 2.) 3x+11y=4 -2x-5y=9
*Tuesday, March 3, 2015 at 8:50pm*

**math**

bobs monthly phone bill is made up of a 10.00 fee plus $0.05 per min.bobs phone bill for july was 22.00 write an equation to model the situation using m to represent the number of min. solve the bequation to determine the number of phone mins.bob used in july
*Tuesday, March 3, 2015 at 8:49pm*

**math derivatives**

derivative of ln[(1+v)^(1+v)(1-v)^(1-v)] I know my log rules allow me to rewrite this as ln[(1+v)(1+v)+(1-v)(1-v)] but what I do from there i dont know.... Wolfram says it is ln(v+1)-ln(v-1)but i dont know how to get that...
*Tuesday, March 3, 2015 at 8:47pm*

**Math **

What is 13 3/5 - 6 1/4 =? Show me the work please.
*Tuesday, March 3, 2015 at 8:03pm*

**Math**

What is 8 3/4 - 5 5/6 =? Shouldn't the denominator be 24 ? What is this answer please show the work.
*Tuesday, March 3, 2015 at 8:01pm*

**Math**

Which relation is a function? (Points : 1) A.(1, 2), (1, 5), (1, -1), (1, 4)} B. {(8, -1), (2, -1), (3, 8), (2, 5} C. {(-3, 4), (-2, 5), (0, 9), (0, 12)} D. {(7, 12), (1, -5), (3, -10), (2, -5)} Is its C :P?
*Tuesday, March 3, 2015 at 7:56pm*

**Math**

Sara long jump was 10 feet. That is 5/6 foot longer than Tom's long jump. Did Tom jump more or less than 10 feet? I think I have to multiply and so Tom's jump was less by . I think his jump was 8 1/2 feet. Is tis correct?
*Tuesday, March 3, 2015 at 7:53pm*

**math**

emily pays $93 each year to belong to a photography club. next year, the membership fee will increase by 12.5%. emily estimates that the membership will just be under $100 each year after the increase. what is a true statement about emily's estimate? a. her estimate is ...
*Tuesday, March 3, 2015 at 7:44pm*

**math**

I am less than 20 I am an odd number I am the square root of 225 I am
*Tuesday, March 3, 2015 at 7:44pm*

**Math**

Bill plays ball for 9 hours each week. His friend Mark spends as much time playing ball. Who plays more ball? I think I have to divide. So I think Mark plays more ball by 10 4/5 hours. Is this correct? Thank you so very much for your help Ms. Sue.
*Tuesday, March 3, 2015 at 7:32pm*

**math**

8sin^4(x)
*Tuesday, March 3, 2015 at 7:26pm*

**Math**

Hank's fish bowl holds 9/10 gallon of water. It is now 2/3 full. How much water is in the bowl? I subtracted and my answer is 7/30. Is this correct?
*Tuesday, March 3, 2015 at 7:23pm*

**Math**

I can throw a ball 10 1/3 yards. My cousin can throw a ball 13 1/12 yards. How much farther can my cousin throw the ball? I think I have to subtract and my answer is 2 3/4 yards farther. Is this correct?
*Tuesday, March 3, 2015 at 7:18pm*

**Math**

Amy uses 8 cups of flour to make 3 identical loaves of bread.How much flour is in each loaf? I think it is division and I got 2 2/3 cups of flour. Is this correct?
*Tuesday, March 3, 2015 at 7:14pm*

**MATH**

In Mrs.Marshall'd classroom, 6/7 of the students play sports. Of the students who play sports, 4/5 also play as instrument. If there are 35 students in her class, how many play sports and an instrument?
*Tuesday, March 3, 2015 at 7:10pm*

**Math**

Sue's kitten eats 1/12 pound of food everyday. If Sue buys food in 5 pound bags, how many days does one bag of food last? I think I would divide and the answer would be 60 days is this correct?
*Tuesday, March 3, 2015 at 7:10pm*

**math**

At a school camp, 30% of the students were boys. When 87 students left the camp after the second day, half the original number of boys were left behind, and the number of girls decreased by 20%. How many girls were at the camp in the beginning?
*Tuesday, March 3, 2015 at 7:08pm*

**Math**

Find the area of the basketball court. The length of the rectangle is 100m and the radius of the seni-circle is 25m.
*Tuesday, March 3, 2015 at 7:06pm*

**Math**

Bill can ride his bike 7 1/2 miles in a hour. a. How far will he ride in 3 hours? b. How far will he ride in 1/3 of an hour? I think for a. the answer is multiply so it would be 22 1/2 miles and for b. it would be 2 1/2 miles. Is this correct?
*Tuesday, March 3, 2015 at 7:06pm*

**Math**

The area of a rectangular field is given by the trinominal t^2-4t-45. The length of the rectangle is t+5. What is the expression for the width of the field? A) t-9 B) t-5 C) t-11 D) t-7 Can someone please help? Thank you!
*Tuesday, March 3, 2015 at 6:42pm*

**math**

A number of circles touch each ather. The area of the smallest circle is 4picm2 and each consecutive circle has area 9/4 times that of the previous one. If the distance AB=665/8. Line AB passes at the centre of the circles. How many circles are there?
*Tuesday, March 3, 2015 at 6:25pm*

**Math**

Ms. Henderson’s 5 art classes are turning in their final projects for the year. The table shows the numbers and type of project turned in during her first 4 classes. Part A Write the ratio of paintings to sculptures for each class in simplest terms. Class A(8 to 12): 2:3...
*Tuesday, March 3, 2015 at 5:46pm*

**math**

if u buy 15 bags of chips and it only costs $20 and u have $62 how much change are going to get back
*Tuesday, March 3, 2015 at 5:20pm*

**math**

Here are linear equations Find the value of x and y 1/2x + 1/3y = 8 3/2x - 4/3y = -4 I got y= -72/7 and x= 160/7
*Tuesday, March 3, 2015 at 4:55pm*

**Math**

Several friends each have 2/5 of a bag of peanut left over they should bought 2 fewer bags
*Tuesday, March 3, 2015 at 4:23pm*

**7th Grade Math.**

I have been trying to work this out but just cant. Find the function rule. X -2 -1 0 1 2 Y 9 4 -1 -6 -11 Thanks, ~JH
*Tuesday, March 3, 2015 at 4:11pm*

**Math**

Warren poured some chips of the Pringles can, 6 chips were broken which represents 8% of the can. In all, how many chips were in the Pringles can?
*Tuesday, March 3, 2015 at 4:05pm*

**math**

explain how you can use a number line to show that 3/6 and 1/2 are equivalent fractions?
*Tuesday, March 3, 2015 at 4:03pm*

**math**

If you buy two DVDs for $8 each and one poster for for $6 and there was a 40% store discount what was the sales price of the purchase How do I get started I am confused???
*Tuesday, March 3, 2015 at 3:31pm*

**math**

Christopher made three and one fourth dozen cupcakes . He added vanilla icing to one third and chocolate to the rest . How many cupcakes in dozen have chocalote icing ? I need answer and show work pls
*Tuesday, March 3, 2015 at 3:08pm*

**math**

A trainer for a professional football team keeps track of the amount of water players consume throughout practice. The trainer observes that the amount of water consumed is a linear function of the temperature on a given day. The trainer finds that when it is 90 degrees the ...
*Tuesday, March 3, 2015 at 2:39pm*

**Math, Analytic Geometry**

Derek wants to determine the height of the top of the backboard on the basketball goal at the playground. He places a standard 12-inch ruler next to the goal post and measures the shadow of the ruler and the backboard. If the ruler has a shadow of 10 inches and the backboard ...
*Tuesday, March 3, 2015 at 2:24pm*

**math**

sasha has a bag of l red sock, 1 blue sock, 1 white sock, and 1 green sock. she pulls a sock out of the bag without looking, puts it back, and pulls out another sock out of the bag without looking. What is the probability that she will pull out a white sock both times?
*Tuesday, March 3, 2015 at 2:20pm*

**Math - Geometry - Triangle Medians and Altitudes**

Points D, E, and F are the midpoints of sides BC, CA, and AB, respectively, of triangle ABC. Points X, Y, and Z are the midpoints of EF, FD, and DE, respectively. If the area of triangle XYZ is 21, then what is the area of triangle CXY?
*Tuesday, March 3, 2015 at 1:19pm*

**math**

Points $D$, $E$, and $F$ are the midpoints of sides $\overline{BC}$, $\overline{CA}$, and $\overline{AB}$, respectively, of $\triangle ABC$. Points $X$, $Y$, and $Z$ are the midpoints of $\overline{EF}$, $\overline{FD}$, and $\overline{DE}$, respectively. If the area of $\...
*Tuesday, March 3, 2015 at 1:17pm*

**math**

anne spent half of her money on CDs. After se spen half of what was left on stickers
*Tuesday, March 3, 2015 at 1:12pm*

**6th Grade Math**

A deep-sea diver must descend and ascend in short steps to equalize pressure on his body. If the diver rises toward the surface too fast, he may suffer from a physical condition called "the bends". Suppose the diver started at 82 feet below the surface and rose in ...
*Tuesday, March 3, 2015 at 12:46pm*

**Math**

line segment AB is parallel to line segment CD and AB is not equal to CD. Prove that A, B, C, and D must lie in a plane and form a trapezoid. I really don't understand and i need help, thanks.
*Tuesday, March 3, 2015 at 12:12pm*

**math**

3000 for 3 years at 1.8% compounded monthly
*Tuesday, March 3, 2015 at 11:11am*

**6TH GRADE MATH**

The value of the dependent variable in a function is always __________ the value of the independent variable. 1.GREATER THAN 2.DEPENDENT ON 3.LESS THAN 4.EQUAL TO
*Tuesday, March 3, 2015 at 10:32am*

**math**

16. A picture of a star has 6 identically matched points. What is the least number of degrees that you can rotate the star onto itself? (1 point) 60° 120° 180° 240 How do i figure this out?
*Tuesday, March 3, 2015 at 10:19am*

**using skills**

All of the following are math materials except A. two-dimensional cutouts. B. wipe-off folders. C. paper and pencil. D. sand and clay. b. is my answer
*Tuesday, March 3, 2015 at 10:04am*

**Math**

Prove that if the sides of one angle are parallel to the sides of another angle, the angles are congruent. Given: BA||ED, BC||EF, AND BEG Prove:angle ABC is congruent to angle DEF
*Tuesday, March 3, 2015 at 9:45am*

**Math**

Hi! I need help with this. Thank you! Directions: Solve this equation by doing it twice; one time using the substitution method and one time using the graphing method. -2/3 x + y = 2 2x – 3y = 6
*Tuesday, March 3, 2015 at 8:51am*

**math**

James has a board that is 3/4 foot long. He wants to cut the board into pieces that's each 1/8 foot long. How many pieces can James cut from the board? My work; 👈--0-----:-----1/4-----:-----1/2-----:-----3/4 |____________|_________|__________| |____________|...
*Tuesday, March 3, 2015 at 8:35am*

**math**

the sum of the squares of two consecutive numbers is 265. find the numbers
*Tuesday, March 3, 2015 at 5:43am*

**math**

The range of the of the ages of the Glee club officers is 5. this means that a.) the difference of all ages of the officers is 5 b.) one qualifies to be an officer if he is 5 yrs below the mean age. c.) one qualifies to be an officer if he 5 yrs above the mean age d.) the ...
*Tuesday, March 3, 2015 at 5:39am*

**math**

1.39 1.61 1.6 1.53 1.62 1.61 1.64 1.59 1.62 1.51 1.52 1.6 the mean height of the students is 1.57 meters. what does it imply? a.) there are more students whose heights are below 1.57 meters b.) the average height of the students is 1.57 meters. c.) most of the students have a ...
*Tuesday, March 3, 2015 at 5:27am*

**Math~HURRY!**

There is an icsosles triangle and one side is 70 degrees, and there is congruent side. The top side is x...what is X? EXPLAIN PLEASE
*Tuesday, March 3, 2015 at 4:40am*

**Math**

Mr. Tankard’s minivan has a 21 gallon tank. He can travel 354 miles on one tank of gas. How many miles per gallon does the minivan get? How many tanks of gas will he need to travel 870 miles?
*Tuesday, March 3, 2015 at 3:36am*

**math **

Please help me on linear relation. I have tries but I am really stuck on the creating table and graphing. 1. provide a table of six values that represent a linear relation. All the y-values must be less then zero. 2. provide a table of six values that does not represent a ...
*Tuesday, March 3, 2015 at 2:15am*

**Math **

provide a table of six values that represent a linear relation? 6 values mean that 6 number on each side x and y value?
*Tuesday, March 3, 2015 at 1:53am*

**Math**

An unfair coin with Pr[H] = 2/3 is flipped. If the flip results in a head, then a marble is selected from an urn containing 9 red, 1 white, and 1 blue marbles. If the flip results in a tail then a marble is selected from an urn containing 10 red and 3 white marbles. If the ...
*Monday, March 2, 2015 at 11:20pm*

**Data Management **

Could you help me with this math question. The mean of 4 numbers is 5 and the mean of 3 different numbers is 12. What is the mean of the 7 numbers combined? Produce an algebraic solution.
*Monday, March 2, 2015 at 10:43pm*

**Math- Data Management **

How would you solve this problem. The mean of 10 numbers is 8. If an 11th number is now included, the mean becomes 9. What is the value of the 11th number? Make an algebraic solution.
*Monday, March 2, 2015 at 10:41pm*

**math **

Check plz Jake Vought a hammer for $11.70 and four pieces of paneling for $7.95 each. If the sales tax rate is 6%_ how much change will he receive from $50.00 7.95*4=31.80 11.70+31.80=43..50 43.50*.06=2.61 43.50+2.61=46.11 50.00-46.11=3.89
*Monday, March 2, 2015 at 10:29pm*

**Math- MDM4U data Managment**

How do you solve this question. I literally have no idea on where to start. "If the mean of the following numbers is /7, find the c value. Produce an algebraic solution. Numbers: 12, 18, 21, c, 13 Please help.
*Monday, March 2, 2015 at 10:22pm*

**math**

Check plz There are shirts on sale for 25% off. The sale price is 12.75. What is the original price. $12.75 *.25=3.19 $12.75+3.19=15.94
*Monday, March 2, 2015 at 10:17pm*

**math**

Rick has a collection of 6 video games. He lets his best friend borrow: of his video game collection. Write two equivalent to this number Explain how you came fractions up with the fractions.
*Monday, March 2, 2015 at 10:15pm*

**business math**

Israel signed a simple discount promissory note for $15,000. The discount rate is 7.5%, and the term of the note is 120 days. What are Israel’s proceeds on the loan?
*Monday, March 2, 2015 at 10:13pm*

**math**

Tom's town has a population of $25,000. If the population increases. 12% next year,how many people will be living there.
*Monday, March 2, 2015 at 10:08pm*

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