Friday

January 30, 2015

January 30, 2015

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**Math**

How do I find the area of a wall? 15 feet by 9 feet
*Monday, January 12, 2015 at 4:51pm*

**math**

The value of.a telephone calling card decreases 20cents forma each minute used. Write en integer to express the change un the cards value for a 4 minute call.
*Monday, January 12, 2015 at 4:50pm*

**math**

In the following triangle, AB ⊥ CD and AC ⊥ BC CD is the bisector of triangle ABC If AD = 16m, and CD = 8m, find BD
*Monday, January 12, 2015 at 4:47pm*

**math**

Two cities on a map are 2 and 1/4 inches apart. The cities are actually 112.5 miles apart. How many miles is represented by one inch? What is the actual distance between two cities that are 4 and 3/4 inches apart? Use proportions
*Monday, January 12, 2015 at 4:31pm*

**math**

The temperature drops 5F each hour for 4 hours. Use en integer to express the total drop in temperature.
*Monday, January 12, 2015 at 4:24pm*

**Math**

Write an algebraic expression for the following verbal expression. Let n = the number Six less than the product of 12 and a number
*Monday, January 12, 2015 at 4:22pm*

**please help me in math**

The two-way table shows the number of people whose hobbies are reading or solving puzzles and who either ride a motorcycle or don’t ride a motorcycle. Among people whose hobby is reading, what is the relative frequency of not riding a motorcycle? Express your answer as a ...
*Monday, January 12, 2015 at 4:21pm*

**Math**

Out of 18 students at dance camp, 6 are boys. What is the ratio of girls to students at the dance camp, in simplest form.
*Monday, January 12, 2015 at 4:04pm*

**math**

what is 8/100, 3/5, 7/10 least to greatest
*Monday, January 12, 2015 at 3:55pm*

**Math**

Equation: t=5(logP/log0.5) P is the percentage of caffiene in the bloodstream related to t, time elapsed in hours Suppose you drink a cup of coffee at 9:00 a.m. What percentage of the caffiene will remain in your body at noon?
*Monday, January 12, 2015 at 3:16pm*

**12 U Math**

Solve and check for extraneous roots. log_2x+log_2(x+2)=3 * _2 is a subscript and (x+2) isn't a superscript*
*Monday, January 12, 2015 at 1:53pm*

**Math**

[Key: /= a fraction bar] Olga ran 5 kilometers in 37 minutes. Which could Olga use to determine m, the number of minutes she would take to run 25 kilometers at this rate? A. 37/5 = 25/m B. 5/m = 25/37 C. 37/5 = m/25 D. 5/m = 37/25
*Monday, January 12, 2015 at 1:51pm*

**math**

The scale balanced when n+20=80 Suppose the left side becomes n+3 How can I change the right side so that n+3=____ is equivalent to n+20=80 How can I change the right side to get an equivalent equation my choices are A. Add blank to the right side B. Divide the right side by ...
*Monday, January 12, 2015 at 1:07pm*

**Math**

The solution set to the inequality:-2x^2+8x-6>0 is ?
*Monday, January 12, 2015 at 12:56pm*

**Math**

How to simplify 5^(4/3)? by writing it in radical form?
*Monday, January 12, 2015 at 12:53pm*

**Math**

Is 2square root 6 the same as square root 6?
*Monday, January 12, 2015 at 12:46pm*

**Math**

A scientist is monitoring the temperature of a holding tank containing fish to be released into a river. In one 12-h period, the highest temperature was 10.4°C and the lowest temperature was 7.6°C. Write an absolute value equation that can be used to report the highest...
*Monday, January 12, 2015 at 12:31pm*

**Math**

The velocity of an object is given by the formula v=25t-80, where the time is expressed in seconds and the velocity is expressed in feet per second. Find the times when the magnitude of the velocity is equal to 60 ft/s. (3 marks)
*Monday, January 12, 2015 at 12:24pm*

**Math**

What transformation happens from In x to 3 In x? Also, I had thought that 3 In x and In x^3 are the same, but the graphics calculator shows otherwise.
*Monday, January 12, 2015 at 12:12pm*

**Math**

If I were to compare -(-9)and -[-9] would it be less than, more than or equal to? I say it is equal to. Would I be right? Thank You for your help.
*Monday, January 12, 2015 at 12:04pm*

**Math**

What rational number is less than 0 but greater than -1/2? I think its negative 1/4 would I be right? Thank You for your help.
*Monday, January 12, 2015 at 11:33am*

**math**

May takes 12 hours to type a report. Her friend helps her and together they finish the job in 4 hours. How long would it take her friend had she worked alone? Representation: Equation: Solution: Conclusion:
*Monday, January 12, 2015 at 9:57am*

**Currently doing Math,life science,geography and ph**

I am thinking of changing physical science and do business with math,life science,business and geography what career can i pursue?
*Monday, January 12, 2015 at 9:40am*

**Math**

how to understand and visualize 0.7X0.7 and (1/4)X(4/5) in terms of repeated addition?
*Monday, January 12, 2015 at 9:29am*

**math**

find the simple interest on naira 28 for 25 years at 1 percentage per annum.
*Monday, January 12, 2015 at 8:00am*

**math**

The temperature outside was 3 degrees Fahrenheit at midnight. During the next hour the temperature fell 7 degrees. What was the temperature at 1 A.M. Can u explain to me how to do it please
*Monday, January 12, 2015 at 12:41am*

**Reiny**

Just a question for you. How do you remember all this. I'm wondering because I'm in precalc and I always seem to forget how to do the problems a couple weeks after the test. You seem to know everything without even hesitating. Side note- I found this site by googling a...
*Sunday, January 11, 2015 at 10:12pm*

**math**

4x^2+4y^2-16x-24y+51=0 is the equation of a circle. where is the center of the circle and what is it's radius? A. center (2,3) radius=1/4 B. center (2,3) radius=1/2 C. center (-2,-3) radius=1/4 D. center (-2,-3) radius=1/2
*Sunday, January 11, 2015 at 9:32pm*

**math**

simplify: square root (4/3)-square root (3/4) A. 2-sqaure root(3)/2 square root (3) B. square root (7/12) C. square root (3)/6 D. 2/square root (3) which answer? this is what i got square root (16/12)- square root (9/12)= square root (7/12)
*Sunday, January 11, 2015 at 9:31pm*

**math**

simplify: (y+1)(y/1-y^2) which answer: A. Y/y-1 B. y/1-y C. y+1/y-1 D. -1 this is what i got y+1/1* Y/1-y^2=-1
*Sunday, January 11, 2015 at 9:28pm*

**math**

simplify: 6-y/6/1/6-1/y 6-y/6*6y/y-6= 6y/6=y Is this correct help i need help!!
*Sunday, January 11, 2015 at 9:19pm*

**math**

simplify: square root (4/3)-square root (3/4) A. 2-sqaure root(3)/2 square root (3) B. square root (7/12) C. square root (3)/6 D. 2/square root (3) which answer? this is what i got square root (16/12)- square root (9/12)= square root (7/12)
*Sunday, January 11, 2015 at 9:18pm*

**math**

simplify: 6-y/6/1/6-1/y 6-y/6*6y/y-6= 6y/6=y Is this correct help i need help!! answers: A. -y B. y C. -6/y D. -1/y which one?
*Sunday, January 11, 2015 at 9:16pm*

**math**

simplify: (y+1)(y/1-y^2) which answer: A. Y/y-1 B. y/1-y C. y+1/y-1 D. -1 this is what i got y+1/1* Y/1-y^2=-1
*Sunday, January 11, 2015 at 9:16pm*

**math**

if 3abs(x+4)=8, then x=? A. {-10,2} B. {-2,2} C. {-19,11} D. {-22,-14} which one? idek
*Sunday, January 11, 2015 at 9:16pm*

**math**

if 1-1/x=2-2/x, then 3-3/x=? A. -3 B. -1/3 C. 0 D. 1/3 E. 3 idek how to do it?
*Sunday, January 11, 2015 at 9:15pm*

**math**

4x^2+4y^2-16x-24y+51=0 is the equation of a circle. where is the center of the circle and what is it's radius? A. center (2,3) radius=1/4 B. center (2,3) radius=1/2 C. center (-2,-3) radius=1/4 D. center (-2,-3) radius=1/2
*Sunday, January 11, 2015 at 9:15pm*

**math**

the number line below shows an estimate for the sum of 6/13 and 1/8. explain why the sum is greater than 1/2.
*Sunday, January 11, 2015 at 9:03pm*

**Math**

Jill wrote the number 40. If her rule is add 7, what is the fourth number in Jill's pattern? How can you check your answer?
*Sunday, January 11, 2015 at 8:22pm*

**math**

circle smallest fraction in each set. 4/7 3/8 2/3
*Sunday, January 11, 2015 at 7:39pm*

**math**

penny farthing had a large front wheel radius 65cm and a small back wheel radius 25 cm. how many times did the back wheel turn for each turn of the front wheel?
*Sunday, January 11, 2015 at 7:23pm*

**math**

1. What is the slope of the line that passes through the points (-2, 5) and (1, 4)? a) -3 b) -2 c) -1/3 d) 1/3*** 2) a line has slope -5/3. Through which two points could this line pass? a) (12, 13),(17, 10) b) (16, 15), (13, 10)*** c) (0,7), (3, 10) d) (11, 13), (8,18) 3) The...
*Sunday, January 11, 2015 at 7:16pm*

**math**

hey umm what is 2.4*-0.39
*Sunday, January 11, 2015 at 7:13pm*

**Math**

Solve the equation. Check for extraneous roots. 4^2x-4^x-20=0
*Sunday, January 11, 2015 at 7:13pm*

**12 Math**

Solve exactly. a)3^x-2=5^x b)2^k-2=3^k+1
*Sunday, January 11, 2015 at 7:12pm*

**math**

Together Marc and Paul have $32 Marc has $4 less than twice the amount Paul has. How much does each man have? How do I set this up -4+2x=32 ??
*Sunday, January 11, 2015 at 6:41pm*

**math**

joshua has 735 stamps. megan has more stamps than nikki but less than Joshua. give a possible number of stamps for megan.
*Sunday, January 11, 2015 at 6:39pm*

**Currently doing Math,life science,geography and ph**

I am thinking of changing physical science and do business with math,life science,business and geography what career can i pursue?
*Sunday, January 11, 2015 at 5:53pm*

**Math**

A scientist is monitoring the temperature of a holding tank containing fish to be released into a river. In one 12-h period, the highest temperature was 10.4°C and the lowest temperature was 7.6°C. Write an absolute value equation that can be used to report the highest...
*Sunday, January 11, 2015 at 5:47pm*

**Math**

I have the ratio for this question but I need help with finding the value of ratio using the ratio I came up with: ratio of V/SA=x/(100+2x) Here's the question: d) Find the value of the ratio for the box for each value of x. (1 mark each) i) 10 cm ii) 20 cm iii) 30 cm
*Sunday, January 11, 2015 at 5:12pm*

**MATH**

The shop sold 264 inflatable rafts in 24 days. What was the average number of rafts sold each day?
*Sunday, January 11, 2015 at 4:18pm*

**MATH**

A portable music player is on sale for 20% off its original price. The sale price is $96. What was the original price of the music player?
*Sunday, January 11, 2015 at 3:44pm*

**Math**

A square sheet of cardboard 100 cm by 100 cm is to have corners of side length x cut out. These cutouts will create flaps that can be folded up to form a box with no lid. The length and width of the base of the box are given by the expression (100 – 2x), and the height of...
*Sunday, January 11, 2015 at 3:32pm*

**Math**

A square sheet of cardboard 100 cm by 100 cm is to have corners of side length x cut out. These cutouts will create flaps that can be folded up to form a box with no lid. The length and width of the base of the box are given by the expression (100 – 2x), and the height of...
*Sunday, January 11, 2015 at 2:42pm*

**Math**

Workers at the camp cut mosquito netting into lengths of 250 cm. How many of these lengths can be cut from 30 m of mosquito netting?
*Sunday, January 11, 2015 at 2:16pm*

**Math**

The campout was open 312 days. During that time, 17,160 m of rope were sold. What was the average amount of rope sold each day?
*Sunday, January 11, 2015 at 2:15pm*

**MATH**

The shop sold 264 inflatable rafts in 24 days. What was the average number of rafts sold each day?
*Sunday, January 11, 2015 at 2:12pm*

**Math**

A set of 6 tent pegs is included with each pup tent sold. How many tent pegs were needed for 54 pup tents?
*Sunday, January 11, 2015 at 2:11pm*

**Math**

Since 2007, a particular fund returned 13.8% compounded monthly. How much would a $4000 investment in this fund have been worth after 4 years?
*Sunday, January 11, 2015 at 1:48pm*

**math**

The temperature on one day in January for Phoenix, AZ, is 62 degrees Fahrenheit. On the same day in Barrow, AK, the temperature is -29 degrees Fahrenheit. What is the difference between these two temperatures?
*Sunday, January 11, 2015 at 1:40pm*

**math**

okay, sorry for last post but this one i'm stuck on. Use the vertical line test to determine if the relation {(–6, –2), (–2, 6), (0, 3), (3, 5)} is a function. Explain your response sorry that i cant put the graph down. those numbers are points in a graph. ...
*Sunday, January 11, 2015 at 1:31pm*

**math**

A taxi company charges passengers $1.00 for a ride, and an additional $0.30 for each mile traveled. The function rule C = 0.30m + 1.00 describes the relationship between the number of miles m and the total cost of the ride c. If the taxi company will only go a maximum of 40 ...
*Sunday, January 11, 2015 at 1:26pm*

**Math**

A 13.5 gallon tank is 4/5 full. How many gallons will it take to fill the tank?
*Sunday, January 11, 2015 at 11:00am*

**Math**

Tom and Wendy both do three test and their marks have the same mean. The range of Tom's marks is twice the range of Wendy's marks. Copy and complete the table. |Tom's marks |__|60|__ |Wendy's marks|55|60|65
*Sunday, January 11, 2015 at 7:13am*

**math**

A ladder is 3.5 m long. It leans against a vertical wall when placed on horizontal ground . The ladder rest at a point on the wall that is 3m above the ground. What angle will the ladder make with the horizontal?
*Sunday, January 11, 2015 at 7:01am*

**math**

I would need help with example: The three numbers are consecutive terms of arithmetic progression and the sum of their second powers is 126. The first number 3 times smaller, the second number with no change and the third number 4 times greater, are the 3 consequtive terms of ...
*Sunday, January 11, 2015 at 6:21am*

**math**

if we consider multiplication as repeated addition then it is simple to visualise 3x4=12 as 4 being added three times which is basically repeated addition , a general definition of multiplication.But it is difficult for me to understand or visualize questions like 0.3x3 and (2...
*Sunday, January 11, 2015 at 4:38am*

**math**

3 PART PROBLEM: Jen bought some sesame bagels and some plain bagels. The ratio of the number of sesame bagels to the number of plain bagels is 1:3. a)What fraction of the bagels are plain? b)What percent of the bagels are plain? c)If Jill bought 2 dozen bagels, how many of ...
*Sunday, January 11, 2015 at 4:09am*

**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*

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