Saturday

January 31, 2015

January 31, 2015

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**Math**

Solve this linear equation, y-x divided by 2=5 x-y divided by 5=13
*Sunday, January 11, 2015 at 2:36am*

**Math**

Would these simplified expressions by equivalent to these expressions: i)f(x)=-3(x+2)^2 ii)f(x)=x^2-x-2 / 3x^2+4x+1 Simplified expressions: i)-3x^2-13x-13 ii)(x-2)(3x+1) Please help me!
*Saturday, January 10, 2015 at 11:33pm*

**math**

7/8 + 3/4 + 1/16 =
*Saturday, January 10, 2015 at 10:50pm*

**math**

7/8 x 3/4 - 1/16 =
*Saturday, January 10, 2015 at 10:47pm*

**math**

The cash price of a cupboard is $3 000. An interest of 25% is charged if the cupboard is bought on hire purchase terms. Amina bought the cupboard on hire purchase terms. She paid a deposit and twelve equal installments. Each installment was $ 262.50. How much deposit did she pay?
*Saturday, January 10, 2015 at 10:30pm*

**math/hurry**

The ratio of boys to girls in a graduation class is 5:4. If there are 153 pupils in this class, how many boys are there?
*Saturday, January 10, 2015 at 9:27pm*

**math**

adi, john ,and hailee plant seedlings in their neighberhood park. adi plants 40% of the total number of seedlings, john plants 45% of the total number of seedlings and hailee plants the rest of the seedlings.if hailee plants 87 seedliings how maany seedlings do they plant ...
*Saturday, January 10, 2015 at 8:45pm*

**MATH**

an annuity has an initial balance of $5000. annual withdrawals are made in the amount of $800 for 9 years, at which point the account balance is zero. what annual rate of interest, compounded annually, was earned over the duration of this annuity? PV = $5000 R = $800 n = 9 i...
*Saturday, January 10, 2015 at 7:38pm*

**Math**

Simplify the expressions in each pair. (2 marks each) (Show your work) (x^2-2x)/(x+1)x (x^2-1)/(x^2+x-6) My work on simplifying the expressions x(x-2)/x+1 x (x+1)(x-1)/(x+3)(x+2) If I've gone wrong please help me understand where I went wrong and help me get the correct ...
*Saturday, January 10, 2015 at 7:14pm*

**Math**

Simplify each expression and state any non-permissible values. (4 marks - show your work) 4x-1/x^2+7x+12 divided by 2x-1/x^2+x-12 My work on simplifying the expressions: 4x-1/(x+3)(x+4)divided by 2x-1/(x+4)(x-3) If I've gone wrong please help me understand where I went ...
*Saturday, January 10, 2015 at 6:57pm*

**Math**

Simplify the expressions in each pair. (2 marks each) (Show your work) (x^2-2x)/(x+1)x (x^2-1)/(x^2+x-6) My work on simplifying the expressions x(x-2)/x+1 x (x+1)(x-1)/(x+3)(x+2) If I've gone wrong please help me understand where I went wrong and help me get the correct ...
*Saturday, January 10, 2015 at 6:53pm*

**Math**

So for these simplified functions would they be equivalent to these functions: Is -3x^2-13x-13 equivalent to f(x)=-3(x+2)^2 Is [(x-2)(x+1)]/[3x+1)(x+1] equivalent to f(x)=(x^2-x-2)/(3x^2+4x+1)
*Saturday, January 10, 2015 at 6:33pm*

**math**

Greg's number of pencils is 3/5 the number of Tom's pencils. Together they have 56 pencils.How many pencils does Greg have? How many pencils does Tom have? How many more pencils does Tom have than Greg?
*Saturday, January 10, 2015 at 6:03pm*

**Math Algebra**

Jessica is 4 years younger than Jennifer now. In 10 years, Jessica will be twice the age that Jennifer is now. Find the present ages of Jennifer and Jessica
*Saturday, January 10, 2015 at 5:38pm*

**Math**

My work on simplifying this function: g(x)=(-3x^2-13x-13) g(x)=-3x^2-13x-13 (13x-13=x) g(x)=-3x^2-x Can someone help with the simplifying the function if I have got it wrong and also can someone tell me of it's equivalent to this function:f(x)=-3(x+2)^2-(x+1) Also I have ...
*Saturday, January 10, 2015 at 4:31pm*

**Math**

Simplify the expressions in each pair. (2 marks each) (Show your work) i) (x^2-x-2)/(x+1),g(x)=(x-2) My work on simplifying the functions: (x-1)(x+2)/(1) (x-1)(x+2) ii) (x^2-x-12)/(x+3), g(x)=(x^2-6x+8)/(x-2) My work on simplifying the functions: (x-2)(x+6)/(3) (x-4) Can you ...
*Saturday, January 10, 2015 at 4:17pm*

**math**

A salesman is paid a monthly salary of $6,000 and a 5% commission on goods he sells above $20,000 each month. In a certain month the salesman earned $13, 000. How much money was the sales of the goods that month?
*Saturday, January 10, 2015 at 4:07pm*

**Math**

Simplify the expressions in each pair. (2 marks each) (Show your work) i)f(x)=(x^2-x-2)/(x+1), g(x)=(x-2) ii)f(x)=(x^2-x-12)/(x+3), g(x)=(x^2-6x+8)/(x-2)
*Saturday, January 10, 2015 at 3:31pm*

**Math**

Simplify each expression and state any non-permissible values. (4 marks - show your work) (4x-1)/(x^2+7x+12)divided by (2x-1)/(x^2+x-12)
*Saturday, January 10, 2015 at 3:07pm*

**math**

I would need help with example: The sum of three consecutive terms of geometric progression is 9. The first number with no change, the second number plus 12 and the third number minus 3, are the 3 consequtive terms of arithmetic progression. What are the values of original 3 ...
*Saturday, January 10, 2015 at 2:38pm*

**math**

number sense is 7/8 or 11/10 closer to 1 how did you decide?
*Saturday, January 10, 2015 at 2:36pm*

**Math**

Simplify each expression and state any non-permissible values. (4 marks - show your work) (x^2-2x)/(x+1) x (x^2-1)/(x^2+x-6)
*Saturday, January 10, 2015 at 2:36pm*

**Math**

Simplify the expressions in each pair. (2 marks each) (Show your work) i)f(x)=(x^2)-(x)-2/(x+1),g(x)=(x-2) ii) f(x)=(x^2)-(x)-12/(x+3), g(x)=(x^2)-(6x)+8/(x-2)
*Saturday, January 10, 2015 at 2:32pm*

**math**

Writing in Math To find the sum of 4/9 and 7/12, Mario rewrites the fractions as 8/36 and 21/36. His answer is 29/36. Is Marion right? If not, show his error and correct it.
*Saturday, January 10, 2015 at 2:25pm*

**Math**

Have I done the predicting part of assignment, now I need help with the simplifying part of the assignment. Can you please help me? Here are the functions: g(x)=(-3x^2)-(13x)-13 g(x)=(x-1)/(3x+1)
*Saturday, January 10, 2015 at 2:22pm*

**math**

an annuity has an initial balance of $5000. annual withdrawals are made in the amount of $800 for 9 years, at which point the account balance is zero. what annual rate of interest, compounded annually, was earned over the duration of this annuity? PV = $5000 R = $800 n = 9 i...
*Saturday, January 10, 2015 at 1:38pm*

**Math**

Where did you get the two from in (3/2)?
*Saturday, January 10, 2015 at 12:32pm*

**Math**

you know that 8x = 5y you know that 3y=14z since 5 = (5/3)*3, 5y = (5/3)*(3y) so, 5y = (5/3)(3y) = (5/3)(14z) = (70/3)z now you have 5y, which is the same as 8x. You want 12x. since 12 = (3/2)*8, 12x = (3/2)*8x. 12x = (3/2)(8x) = (3/2)(5y) = (3/2)(70/3)z = (70/2)z = 35z Can ...
*Saturday, January 10, 2015 at 12:31pm*

**math **

What measures the spread of data?
*Saturday, January 10, 2015 at 12:04pm*

**Math**

When finding the perimeter of the figure on a grid why do you not count the space inside the grid
*Saturday, January 10, 2015 at 10:14am*

**Math**

Yancey collects plastic banks. He has three different banks: a pig, a cow, and a horse. How many ways can Yancey arrange his banks on a shelf
*Saturday, January 10, 2015 at 8:33am*

**Math (calculus)**

If y = 2x^3 - 4x and dx/dt = 4, find dy/dt when x = 1. Please show me how to solve this problem with steps.
*Saturday, January 10, 2015 at 6:32am*

**Math**

Pls..Help me Understand and to solve Phytogorean Theory
*Saturday, January 10, 2015 at 1:56am*

**math**

On a map of scale 1:100 000 a rectangular plot of land measures 7cm by 4cm. what are the actual lengths of the plot in kilometers
*Saturday, January 10, 2015 at 1:43am*

**math**

Fifteen painters can paint a number of houses in 12 days .if the number of painters is increased by 5, how many days less would it take the painters working at the same rate to paint the houses?
*Saturday, January 10, 2015 at 1:41am*

**math**

If someone could show me how to do this, I am very confused. thank you for your time. Find the y-intercept of the line whose equation is y = - 2.2x-7.7
*Friday, January 9, 2015 at 11:07pm*

**math**

Find first 8 terms of -2+6-18+...
*Friday, January 9, 2015 at 10:04pm*

**math**

A metal solid made up of a cylindrical bar fixed onto a cube. The cylindrical bar fixed onto a cube. The cylindrical bar is 20 cm long and has a diameter of 7 cm. Each side of the cube is 9 cm long. The surface of the solid was painted. What area in area in cm2 was painted? (...
*Friday, January 9, 2015 at 9:40pm*

**math**

Find first term and common difference of arithmetic sequence whose 13th them is 159 and 20th is 264.
*Friday, January 9, 2015 at 9:35pm*

**Math**

Solve and check. ( 3 marks) 5/(x-1) + 2/(x+1)=-6 Here's my work on it: 5/(x-1)+2/(x+1)=? 5/(-3/2-1)+2/(-3/2+1)=-6 Can you show how I would have found x in this situation and also if I went wrong anywhere.
*Friday, January 9, 2015 at 8:45pm*

**math**

The cylindrical bar is 20 cm long and has a diameter of 7 cm. Each side of the cube is 9 cm long. The surface of the solid was painted, what area in area in cm2 was painted? (Take π
*Friday, January 9, 2015 at 8:40pm*

**Math**

Can you please verify my simplified expressions and point out where I went out wrong if I made mistakes: (3x+1)/(2x^2-2) + (2x+2)/(2x^2-8x+6)=5x+1/2(x+1)(x-3)
*Friday, January 9, 2015 at 8:34pm*

**Math**

Solve and check. ( 3 marks) (5)/(x-1) + (2)/(x+1)=-6
*Friday, January 9, 2015 at 8:13pm*

**math**

A plot of land is in the shape of semicircle of diameter 28 meters. The plot fenced by erecting posts 4 meters apart. How many posts were used? (Take π =22/7)
*Friday, January 9, 2015 at 8:11pm*

**math**

Ron ran 450 meters round a trak in 3 minutes. What was his average running speed in km/h?
*Friday, January 9, 2015 at 7:29pm*

**math**

In a cupboard there are pencils, rulers and books. The number of pencils is 15 more than that of rulers. The number of books is three times that of rulers. If the number of pencils is p,write the equation to represents the total number of items in the cupboard?
*Friday, January 9, 2015 at 6:16pm*

**math**

Roger ran for 1 hour 15 minutes at an average speed of 12 km/h. How many meters did he run?
*Friday, January 9, 2015 at 6:11pm*

**math**

if a person earns $388.01 a month in interest how do you calculate how much they have in their bank account?
*Friday, January 9, 2015 at 5:34pm*

**math**

In a cupboard there are pencils, rulers and books. The number of pencils is 15 more than that of rulers. The number of books is three times that of rulers. If the number of pencils is p, which one of the expressions below represents the total number of items in the cupboard?
*Friday, January 9, 2015 at 5:32pm*

**math**

A fundraising meeting for Jako, Bula, Jane and Abdi raised $ 108,000. Jako got three times as much as abdi. Jane got two-thirds of Jako's share while Bula got half as much as Jako. How much did Bula receive?
*Friday, January 9, 2015 at 5:29pm*

**Math**

The value of a particular investment follows a pattern of exponential growth. You invested money in a money market account. The value of your investment t years after your initial investment is given by the exponential growth model a=2600e^.08t. How much was initially invested...
*Friday, January 9, 2015 at 5:24pm*

**Math**

Write 5+7+9+11+13+15+17 in sigma notation.
*Friday, January 9, 2015 at 4:39pm*

**Math 6 help**

The length of a puppy on a scale is 6 cm. If the scale is 1:9cm, what is the actual length of the puppy? 14cm 54cm 48cm 15cm
*Friday, January 9, 2015 at 4:19pm*

**math**

Blake sold 52 tickets to the school play, and Jane sold 8 tickets. What is the ratio , in simplest form, of the number of tickets Jane sold to the number of tickets Blake sold? A)4/27 B)2/13 C)13/2 D)52/8 My answer is A. is that right? thanks.
*Friday, January 9, 2015 at 4:15pm*

**math**

What is the next number in the sequence 7, 16, 32, 57, ____?
*Friday, January 9, 2015 at 3:41pm*

**math**

The price of a radio was reduced by $630. This represented a 30% discount. What was the price of the radio after the discount?
*Friday, January 9, 2015 at 3:29pm*

**Math**

(8.86 + 1.0 * 10^-3) / (3.610 * 10^-3) Calculate the above formula, expressing the answer in scientific notation with the correct number of significant figures: 8.86 + 1.0 * 10^-3 = 8.86 + 0.0010 = 8.8610 = 8.86. 8.86/(3.610 * 10^-3) = 2454 2.454 * 10^3 Please confirm if I did...
*Friday, January 9, 2015 at 3:23pm*

**math**

Fifteen people working at the same rate would complete some work in 10 days. How many days would 6 people need to complete the same work?
*Friday, January 9, 2015 at 3:21pm*

**math**

The price of a radio was reduced by sh. 630. This represented a 30% discount. What was the price of the radio after the discount?
*Friday, January 9, 2015 at 3:18pm*

**math**

a metal container has the following dimensions: 2m * 2.5m * 1.5m how many litres of water can it hold?
*Friday, January 9, 2015 at 3:14pm*

**Math**

You want to make an investment in a continuously-compounding account over a period of three years. What interest rate is required for your investment to double in that time period? Round the logarithm value and the answer to the nearest tenth. is it 2.3
*Friday, January 9, 2015 at 2:45pm*

**Math**

Solve and check. ( 3 marks) (5)/(x-1)+(2)/(x+1)=-6 I need the help!
*Friday, January 9, 2015 at 1:28pm*

**math**

In a scale drawing of a house, the living room is 1 in. long. The actual length is 24 ft. The actual width of the living room is 18 ft. The width on the drawing is __________ in. (Find the width on the drawing). Show your work in every step to receive full credit.
*Friday, January 9, 2015 at 1:27pm*

**Math**

Simplify each expression and state any non-permissible values. (5 marks - show your work) (3x+1)/(2x^2-2) + (2x+2)/(2x^2-8x+6) Please help me!
*Friday, January 9, 2015 at 1:27pm*

**Math**

i) Predict whether the functions in each pair are equivalent by testing three different values of x. (3 marks each - show your work) ii) Determine whether the functions in each pair are equivalent by simplifying the expression on the right side. (2 marks each = show your work...
*Friday, January 9, 2015 at 1:17pm*

**Math**

Determine if the function f(x) is the simplified form of g(x). If it is, state the non-permissible values. If it is not, determine the corrected simplified form, including the non-permissible values. (2 marks) - Show your work g(x)=(2x^2-7x+3)/(x-3) f(x)=(2x+1)
*Friday, January 9, 2015 at 12:59pm*

**Math 6 help**

Do you add or subtract on square centimeters
*Friday, January 9, 2015 at 12:56pm*

**math angles and quadilaterals**

I need help it says what is the measure of right angle D
*Friday, January 9, 2015 at 12:53pm*

**Math**

Determine if the function f(x) is the simplified form of g(x). If it is, state the non-permissible values. If it is not, determine the corrected simplified form, including the non-permissible values. (2 marks - show your work) g(x)=(6x^2)+(x-12)/(2x+3),f(x)=3x-4
*Friday, January 9, 2015 at 12:36pm*

**Math**

Which of the following is another representation of the polar coordinate -9, -90 degrees? Is it 9,270 degrees
*Friday, January 9, 2015 at 12:36pm*

**Math**

Simplify each expression and state any non-permissible values. (4 marks - show your work) x^2-2x/(x+1) x x^2-1/(x^2+x-6) Please help me as I'm on a deadline to finish this course
*Friday, January 9, 2015 at 12:33pm*

**Math 6 help**

The city recreation department is planning their program for next year. They will conduct a survey to determine which sports they should offer. Which question would be beset for the survey? Do you want to play soccer next year? Are you a good basketball player? Have you ever ...
*Friday, January 9, 2015 at 12:28pm*

**Math**

Simplify each expression and state any non-permissible values. ( 3 marks - show your work) x/(x^2-3x-4) - 4/(x+1)
*Friday, January 9, 2015 at 12:26pm*

**math**

Given only an 11 liter jug and an 8 liter jug, each with no markings, find the method of using the two jugs to measure out eactly 1 liter of water while using the smallest amount of water. Argue clearly why you think that your procedure uses the smallest amount!
*Friday, January 9, 2015 at 12:11pm*

**Aristotle **

I know Aristotle studied a lot of things but was he a physicist as well? I feel like he wasn't really one quite yet because it wasn't really officially developed yet. But I know he was very into the math of astronomy and that's basically the first beginnings of ...
*Friday, January 9, 2015 at 11:37am*

**Math**

Find the quotient of the following expression: 7(cos 5pi/6 +isin 5pi/6) / -2(cos pi/2 +isin pi/2) I got -7/4+ 7 square root 3/4 i. Is this correct?
*Friday, January 9, 2015 at 11:28am*

**Math**

A shirt cost $97. Your mom and dad each gave you $50. Your change is $3. You give $1 to your mom and $1 to your dad, then you keep the last dollar. You owe each of them $49, then you you add your dollar. Where does the extra dollar go.
*Friday, January 9, 2015 at 11:24am*

**Math**

You earn $29,500 a year plus 4.1% commission on all sales. Last year you had $128,500 in sales. How much did you earn last year?
*Friday, January 9, 2015 at 9:14am*

**Math**

1. Using the following system of equations : 4x +2x = 6 2x + y= 3 A: Find the solution(s) algebraically showing all work (4 pts) B: State whether it is independent consistent, dependent consistent, or inconsistent. (2pts) C: Demonstrate how to check the systems of solutions, ...
*Friday, January 9, 2015 at 9:03am*

**Math**

Express -5(cos pi/2 +isin pi/2) in rectangular form. I got -5i. Is this correct?
*Friday, January 9, 2015 at 8:51am*

**Math**

Find the following product -5(cos pi/3 +isinpi/3)*2(cos pi/6+ isin pi/6' I got 10i. is this correct?
*Friday, January 9, 2015 at 8:50am*

**Math **

What is the smallest integer that can possibly be the sum of an infinite geometric series whose first term is 9? Please explain in steps.
*Friday, January 9, 2015 at 7:55am*

**math**

Radii of two circles are in the ratio of 2/3. Find the ratio of their circumferences
*Friday, January 9, 2015 at 4:31am*

**math**

Total students=50 How many girl in class when there is 16 more boys than girls?
*Friday, January 9, 2015 at 3:09am*

**Math**

Amelia's soccer team won 3/4 of outgrew its games.The team won 18 games.How many games did the team play? Equation:3/4g=18 ,g is the total number of games. Possible solution: g=18×4/3,g is 24?
*Friday, January 9, 2015 at 12:59am*

**math(5th grade)**

if an elephant's heart beats 25 time a minute, how many days does it take to beat a million times?
*Friday, January 9, 2015 at 12:38am*

**math**

Mary spent $5.39 on apples, if the cost is$0.98 per pound, how many pounds did Mary buy?
*Thursday, January 8, 2015 at 11:37pm*

**MATH**

MY MATH PROBLM 7(x-2)= 7x+14 Answer 0 -10(x-1) = 10-10x Answer x=-1 AM I correct
*Thursday, January 8, 2015 at 11:13pm*

**math**

Mary spent$5.39 on apples. If the cost is $0.98 per pound, how many pounds did Mary buy?
*Thursday, January 8, 2015 at 11:11pm*

**math **

How do you express the sum in simplest form for 1/10plus1/5
*Thursday, January 8, 2015 at 10:43pm*

**6th grade math**

A sperm whale can stay under water 7 times as long as x minutes more than a platypus can. Write and equation that states the relationship of the minutes these two mammals can stay under water. Sperm Whale- 112 Platypus-10 My answer: 7x+10 x=112 Is my answer correct?
*Thursday, January 8, 2015 at 9:41pm*

**MATH**

At a party, married people came with their husbands or wives. if half the women and 1/6 of the men in the party were single, what percentage of the people in the room were married?
*Thursday, January 8, 2015 at 9:03pm*

**6TH GRADE MATH **

A sea cow can stay under water y minutes. This is 11 minutes longer than one - third the time of a hippopotamus can. Write an equation that states the relationship of the minutes these two mammals can stay under water. Complete the table with 16 or 56. Sea cow - 0 Hippopotamus...
*Thursday, January 8, 2015 at 8:47pm*

**6TH GRADE MATH **

A sperms whale can stay under water 7 times as long as X minutes more than a platypus can. Write an equation that states the relationship of the minutes these two mammals can stay under water. Sperm whale - 112 Platypus - 10 my answer is 7*X+10 X=112 Did I solve the problem ...
*Thursday, January 8, 2015 at 8:41pm*

**math**

How to complete the function table for each equation
*Thursday, January 8, 2015 at 8:07pm*

**Math**

How to simplify e^27x?
*Thursday, January 8, 2015 at 7:53pm*

**Math**

a pool 5 feet deep with a diameter of 40 feet is filled with water in 50 minutes. how long will it take to fill a pool that is 6 feet deep with a diameter of 36 feet?
*Thursday, January 8, 2015 at 7:14pm*

**math**

In a box there are 20 balls.7 of the balls are white. The first ball drawn from the box is white. What is the probability that the second ball will be white
*Thursday, January 8, 2015 at 7:10pm*

**math**

Ke is twice as old as Amy. Seven years ago, the sum of their ages was 31. How old is each person this year.
*Thursday, January 8, 2015 at 7:02pm*

**Math**

In the cafeteria's refrigerator, cups of yogurt are kept in stacks of 9. If each worker carries no more than one stack, what is the least number of workers needed to carry cups of yogurt for a class of 42?
*Thursday, January 8, 2015 at 7:00pm*

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