Thursday

October 23, 2014

October 23, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**Math. I have a question.**

Tom wants to build a pen in his yard for his dog. He buys 800 ft of fencing. He concludes that he can only build a rectangle with sides of 300 ft and 100 ft.
*Saturday, September 27, 2014 at 6:00pm*

**math**

I'm working on a school math project, and i need to make my own 2 plans, i know that you can split all 17.5 ct diamonds so that each pirate would get 4.375 ct diamonds but i want to know how i would split them up, like into to 1/2 s or 1/4 and i need another plan please ...
*Saturday, September 27, 2014 at 5:53pm*

**Math**

4. What is the value of the expression below? |-4 -3| - |6 -2| -11 -3 3 11 *** 5. Which word phrase could represent the variable expression 3d + 5? Let d = Beth's age. five more than Beth’s age times three three times Beth’s age minus five five times Beth’s ...
*Saturday, September 27, 2014 at 5:17pm*

**Math 2--questions**

7. Find the sum. –14 + 7 + (–3) –24 –18 –10 *** –4 8. A scuba diver descends 350 feet and then another 120 feet. Express the diver’s final depth as an integer. –420 ft 420 ft ** –470 ft 470 ft
*Saturday, September 27, 2014 at 5:07pm*

**Math**

1.) Find (f - g)(x) if f(x) = 2x - 5 and g(x) = 4. 2.) Given f(x) = 4 and g(x) = 2x - 1, find (f - g)(x). Thanks so much! :)
*Saturday, September 27, 2014 at 4:58pm*

**math**

midpoint (4,13) endpoint (0,6). find the other endpoint
*Saturday, September 27, 2014 at 4:56pm*

**Check my answers? Math help.**

2. Write an integer to represent owing your friend $10. –10 *** –2 2 10 3. Write the sum as a product, then simplify the product. (–8) + (–8) + (–8) + (–8) ( 2(–8) + 2(–8) = –30 4(–8) = –32 **** 4(–8) = 32 5(–8...
*Saturday, September 27, 2014 at 4:35pm*

**math**

are the length of a side of a square and the area of the square related proportionally?
*Saturday, September 27, 2014 at 3:10pm*

**math**

between which two square roots of integers can you find pi?
*Saturday, September 27, 2014 at 3:05pm*

**Personal Finance (Math)**

Becka borrowed $100 from her cousin at the rate of 6% per year. If the inflation rate was 2% that year, what is her cousin's actual rate of return on the loan? How do you work this out?
*Saturday, September 27, 2014 at 2:14pm*

**Math**

explain why the expression (x^2+6) / (x^2+3) which seemingly can be simplified, actually cannot be simplified.
*Saturday, September 27, 2014 at 2:09pm*

**Math**

Explain why the expression (x^2￼+ 6) ------- (x^3+3) , which seemingly can be simplified, actually cannot be simplified.
*Saturday, September 27, 2014 at 2:00pm*

**Math**

What is half of 850
*Saturday, September 27, 2014 at 1:01pm*

**math**

what is the prime factorization of 140
*Saturday, September 27, 2014 at 12:19pm*

**Math**

A bag contains three black balls, four white balls and five red balls. Three balls are removed without replacement. What is the probability of obtaining a one of each colour b at least two red balls ?
*Saturday, September 27, 2014 at 8:38am*

**Math**

Using the following cash flows for projects A and B, use payback period, discounted payback period, NPV, IRR, and MIRR to see if these are good projects or not. > Project A: (283,000); 46,000; 89,000; 104,000; 123,000; 187,000; and 72,000 > Project B: (318,000); 72,000; ...
*Saturday, September 27, 2014 at 7:03am*

**math**

Identify the solution(s) of the system of equations, if any. x + 5y = 6 6x - 15y = 18
*Saturday, September 27, 2014 at 2:22am*

**math**

A rocket ascends at an angle of 60.0˚ with the horizontal. After 1.00 min it is directly over a point that is a horizontal distance of 16.0 km from the launch point. Find the speed of the rocket.
*Saturday, September 27, 2014 at 1:02am*

**Algebra 2**

y-1 ____ x+3 = -3/4 (equivalent ratio) can you explain the steps which you use to get this answer and why you use them . I am sorry I am a disable student and it hard some time to grasp this math fo rme.
*Saturday, September 27, 2014 at 12:29am*

**math **

Find the sum of the first 60 terms of the arithmetic sequence whose first term is −15 and whose common difference is 7.
*Saturday, September 27, 2014 at 12:24am*

**Math one question?**

A scuba diver descends 350 ft and then another 225 ft. Express the diver’s final depth as an integer. –525 ft –575 ft 525 ft 575 ft
*Saturday, September 27, 2014 at 12:20am*

**Math--1 question**

Which word phrase could represent the variable expression 3d + 5? Let d = Beth's age. five more than Beth’s age times three three times Beth’s age minus five five times Beth’s age plus three three minus Beth’s age times five
*Friday, September 26, 2014 at 11:45pm*

**Math Homework**

1.) If f(x)=x^2 and g(x)=4x-5, then fg(x)=4x^3-5x^2? True or False? My answer: True 2.) If f(x) =1/x and g(x)=1/x^2, find (g/f)(x). My answer: I need help with this one.
*Friday, September 26, 2014 at 10:49pm*

**Math--1question**

write an integer to represent a loss of 5 yards in football. –7 –5 5 7
*Friday, September 26, 2014 at 10:48pm*

**math**

the price of a computer fell 20% this year, if the computer now cost $850, how much did it cost last year?
*Friday, September 26, 2014 at 8:30pm*

**Math**

I already know the angle of Eastdale which is 45° due to the turn from due east to the northwest. So therefore so I need to find the measures of angle c and angle n. I can use the Law of Sines. sin‹C/c=sin‹E/e sin‹C/18=(√2/2)/12.7308 sin‹C=18(&#...
*Friday, September 26, 2014 at 8:20pm*

**Math**

Is 2340 divisible by 90 and what is the divisible numbers for my question
*Friday, September 26, 2014 at 7:23pm*

**Math Help.**

write an integer to represent a loss of 5 yards in football. –7 –5 5 7 Write the sum as a product, then simplify the product. (–8) + (–8) + (–8) + (–8) 2(–8) + 2(–8) = –30 4(–8) = –32 4(–8) = 32 5(–8) = –40 ...
*Friday, September 26, 2014 at 6:44pm*

**Math**

Simplfy the following 10.2*1.4/4.8
*Friday, September 26, 2014 at 6:13pm*

**Math.**

write an integer to represent a loss of 5 yards in football. –7 –5 5 7 Write the sum as a product, then simplify the product. (–8) + (–8) + (–8) + (–8) 2(–8) + 2(–8) = –30 4(–8) = –32 4(–8) = 32 5(–8) = –40 ...
*Friday, September 26, 2014 at 5:51pm*

**Math help, anyone?**

Solve by multiplying or dividing integers. 1. –4(3) 12 –12 2. 27 ÷ (–3) 9 –9 3. –40 ÷ 8 5 –5 4. 6(–5) 30 –30 5. 3(–3) 9 –9 6. –56 ÷ (–7) 8 –8 7. –7(–2)(2) 28 –28 8. 18 ÷...
*Friday, September 26, 2014 at 5:29pm*

**Math **

Ivan has 6 times as many blue beads as red beads. He has 49 red and bye beads in all. How many blue beads does Ivan have in all
*Friday, September 26, 2014 at 4:35pm*

**math**

Indicate whether the following statement is True or False The number -3 is an integer and a rational number. True False Is the answer True?
*Friday, September 26, 2014 at 4:27pm*

**Math **

Ivan has 5 times as may blue beads as red beads he has 49 red and blue beads in all. how man blue beads does he have ? I am a mother of a 4th graded I need help trying to help her understand how to do this cause I can't figure it out I know it's a 2 step problem
*Friday, September 26, 2014 at 4:13pm*

**math**

Indicate whether the following statement is True or False The number -3 is an integer and a rational number. True False Is the answer True?
*Friday, September 26, 2014 at 4:09pm*

**math**

Which statement is true? A. All irrational numbers are also rational numbers. B. Half of the irrational numbers are also rational numbers. C. One-third of the irrational numbers are also rational numbers D. Irrational numbers cannot be classified as rational numbers. Is the ...
*Friday, September 26, 2014 at 4:05pm*

**math problem (please help)**

Find ( f + g)(x). f (x) = 3x^2 – 2 g(x) = 2x^2 – x – 2 a. ( f + g)(x) = x^4 + x b. ( f + g)(x) = 5x^4 – x – 4 c. ( f + g)(x) = x^2 + x d. ( f + g)(x) = 5x^2 – x – 4 e. ( f + g)(x) = –5x^2 + x + 4
*Friday, September 26, 2014 at 3:51pm*

**math**

Which number is NOT rational? A. 5.85 B. 63.4 C. 8.52624*** D. 27.5 is the answer C?
*Friday, September 26, 2014 at 3:49pm*

**math problem (please help)**

Find the inverse function of f(x) = (7x-8)/(3x -1).
*Friday, September 26, 2014 at 3:48pm*

**Math Problem (please help)**

Evaluate the function at the specified value of the independent variable and simplify. f(x) = (2x^2 + 8x)/(5x^3 + 40) at x = 3.
*Friday, September 26, 2014 at 3:39pm*

**Math**

Which statement is false? A. Every integer is a real number*** B. The number zero is a rational number. C. Every irrational number is a real number. D. Every real number is a rational number Am I right about the a being the right answer? Thanks
*Friday, September 26, 2014 at 3:33pm*

**math**

Which of the following numbers is an example of an integer? A. -15 B. 3/5 C. √7 D. 0.252525 I choose answer A. Am I correct?
*Friday, September 26, 2014 at 3:25pm*

**math**

I am confused on how to solve this problem, can you help me? It says the distance around the outside of Cedar park is 0.8mile. Joan ran 0.25 of the distance during her lunch break. How far did she run? A. 0.2mile B. 0.25 mile C.1.05 mile D. 2 miles I did 0.80-0.25=0.55 so I ...
*Friday, September 26, 2014 at 3:22pm*

**math**

Sarah earned some money taking care of a dog. She charged $8.50 for washing the dog and $7 for walking the dog. She spent $1.15 on shampoo to wash the dog. What was Sarah’s profit from taking care of the dog?
*Friday, September 26, 2014 at 3:09pm*

**math**

A 500-litre water storage tank is situated at the top of a building at a height of 300 feet.The tank,which is completely full,has two outlet pipes and one inlet pipe.Veeru climbs up to the tank and opens an outlet which can empty a full tank in 10 minutes. At the same time jay...
*Friday, September 26, 2014 at 2:55pm*

**Business math**

Order for 620 dresses from China, cost is $40 a gown, markup based on selling is 76%, what is the selling price of each gown?
*Friday, September 26, 2014 at 2:46pm*

**Math Problem (please help)**

Find the following. f(x) = 7x − 9, g(x) = 8 − x A:(f + g)(x) = B:(f − g)(x) = C:(fg)(x) = D:(f/g)(x) =
*Friday, September 26, 2014 at 2:30pm*

**math**

A man,a woman and a boy can complete a piece of work in 20,30 and 60 days respectively.How many boys should join 2 men and 8 women to complete the work in 2 days?
*Friday, September 26, 2014 at 2:20pm*

**math**

A train 100m long travelling at 72 km/h overtakes another train travelling in the same direction at 54sec. Find the length of the second train
*Friday, September 26, 2014 at 1:07pm*

**Math(Algebra)**

Estimate the size of the bear population 50 bears, 1 year later 100 bears, 2 with taggs what is the estimated size of the bears can you Please wirite me the stepes so I cam understand what you did. Thank You so much foer your help.
*Friday, September 26, 2014 at 12:56pm*

**math**

Which equation is equivalent to 3x + y = 5? (Points : 1) y = 5 3x y = 5 + 3x y = 3x 5 y = 3x 5
*Friday, September 26, 2014 at 12:24pm*

**math**

if I have a 100,000 @8% how much would the payments be and for how long?
*Friday, September 26, 2014 at 11:35am*

**math**

A nine digit number having all its digits distinct and none being zero can be partitioned into two as per well. It turns out that every time the left part is always divisible by the number of digits it has. Which of the following number satisfies this property? a. 183654927 b...
*Friday, September 26, 2014 at 11:22am*

**math**

Think of a 135 digit number formed by writing the first 72 natural number side by side in a string.(i.e.) 1 2 3………70 71 72. Find the remainder when it is divided by 12. a. 2 b. 9 c. 0 d. 5
*Friday, September 26, 2014 at 11:15am*

**Math Problem (please help)**

A rectangular classroom seats 252 students. If the seats were rearranged with three more seats in each row, the classroom would have two fewer rows. Find the original number of seats in each row.
*Friday, September 26, 2014 at 3:19am*

**math**

word problem--If car A is going 50mph and is 15miles ahead of car B who is going 60mph, how long will it take car B to catch up with other? 50x+15=60 -15=15 50x=45 x=10 -
*Thursday, September 25, 2014 at 10:59pm*

**Math URGENT QUICK QUESTION**

factor 9-6x-3x^2 The expression x^2-8x+k cannot be factored if k has the value A.)7 B.)0 C)-7 D)-9 Please show me how to do these questions step by step so that I can understand & learn
*Thursday, September 25, 2014 at 10:15pm*

**math**

two students are playing a math game . the object of the game is to make the least possible number by arranging the given digits inside absolute value bars on a card . in the first round , each player will use the digits 3,5,and7 to fill in the card. One student arranges the ...
*Thursday, September 25, 2014 at 9:20pm*

**math**

Can 50/99 be simplified
*Thursday, September 25, 2014 at 8:21pm*

**Financial Math **

A young executive deposits $400 at the end of each month for 9 years and then increases the deposits. If the account earns 6%, compounded monthly, how much (to the nearest dollar) should each new deposit be in order to have a total of $400,000 after 25 years? Thank you for ...
*Thursday, September 25, 2014 at 8:03pm*

**Math**

Scores on a marketing exam are known to be normally distribute with mean and standard deviation of 60 and 20, respectively. The syllabus suggests that the top 15% of the students will get an A in the course. What is the minimum score required to get an A?
*Thursday, September 25, 2014 at 7:20pm*

**math...**

A. Solve a-9=20 I did 20+9=29 29-9=20 a=29 Part b solve b-9>20 I did b-9>20 b-9+9>20+9 b>29 Part c how is solving the equation in part a similar to solving the inequality in part b? I put They are both using the same numbers. Part D I put A is equal to and b is ...
*Thursday, September 25, 2014 at 7:00pm*

**math**

1. 3w - 10w A, 13w B. -7w** C. -7 D. 7w 2. y + 2y + 3z A. 2y + 3z B. 3y + 3z C. 2y^2+3z D 6yz 3. 6r + r - 5r A. 2r B.1r + r C. 0r D. 7r - 5r 4. 5x + 2(x + 6) A. 7x + 6 B. 7x^2 + 12 C. 7x + 12 D. 7x (x + 6) 5. -3m + 3(m +6) A. 6 B.-6m + 6 C. 6m + 18 D. 18 Help please
*Thursday, September 25, 2014 at 6:45pm*

**math...**

Julia is allowed to watch no more than 5 hours of television a week. So far this week, she has watched 1.5 hours. Write and solve an inequality to show how many hours of television Julia can still watch this week. I did. 5÷1.5=3.33 T=time T<3.33 Julia can watch 3 ...
*Thursday, September 25, 2014 at 6:29pm*

**math**

Farmer john has hens, geese, ducks, and two goats the number of hens equals the number if geese and ducks combined . There are 5 fewer geese than ducks. If the total number of animals is 40 how many are ducks
*Thursday, September 25, 2014 at 6:22pm*

**Math-please check**

Determine if a true bioconditional can be written from each conditional statement. If not, gove a counterexample. 1. If a = b then |a| = |b| Is this true? 2. If y^2= 64 then 3y=24 Is this false? Because if you do -8 both of them aren't equal
*Thursday, September 25, 2014 at 6:13pm*

**Math-please check**

The supershots scored over 75 points in each of ten straight games. The newspaper predicts that they will score more than 75 points tonight. Which form of reasoning is this conclusion based on? A. Deductive reasoning, because the conclusion is based on logic B. Deductive ...
*Thursday, September 25, 2014 at 6:06pm*

**math...**

Solve b-9>20 I did 29-9>20 But I'm not sure that's right.
*Thursday, September 25, 2014 at 6:02pm*

**math**

Is 3/7 greater or less than 15/56
*Thursday, September 25, 2014 at 5:54pm*

**math...**

Graph.. <-3,-2,-1,0,1,2,3,4> the circle is on 2 and is an open circle. Which inequality matches the graph? A. 6w+6>18??? B. 6w+6>=18 C. 6w-6>18 D. -6w+6>14 The answer is A right?
*Thursday, September 25, 2014 at 5:50pm*

**Math! URGENT**

Describe the number of solutions for the equation. -2(x-1)=2x-2 A. Infinite solutions B. One solution C. No solution Is the answer B?
*Thursday, September 25, 2014 at 5:22pm*

**Math! URGENT**

Describe the number of solutions for the equation. 5(x-9)=5x A. No solution B. One solution C. Infinite solutions Is the answer B? Thank You for any help.
*Thursday, September 25, 2014 at 5:18pm*

**Math Help. **

Which inequality matches the graph. <-4,-3,-2,-1,0,1,2,3,4> The dot is on the 1 and is a filled in circle with the arrow going to -4. A. 3x+1>4 B. 3x+1>/4 C. 3x+1<4 D. 3x+1</4 Is the answer C?
*Thursday, September 25, 2014 at 4:43pm*

**Math! URGENT**

Solve the inequality -5p>-30 A. p>6 B. p<6 C. p>-35 D. p<35 Is the answer B?
*Thursday, September 25, 2014 at 4:37pm*

**Math**

For the given point and line, find by projection the point on the line that is closest to the given point and use perp to find the distance from the point to the line. P (3,-5) line: x = (2,-4)+t(3,-4)
*Thursday, September 25, 2014 at 4:32pm*

**Math! URGENT**

-9-6(w+5) Simplify this expression A. -15w+5 B. -15w+30 C. -6w-39 D. -6w+21 Is the answer C?
*Thursday, September 25, 2014 at 4:27pm*

**math**

Hawaii's lowest temperature on record is -11degrees Celsius. What would you expect to be true about the elevation of the site where this temperature was measured.
*Thursday, September 25, 2014 at 4:08pm*

**Please math help**

A: I am choosing an integer. I then subtract 10 from the integer, take the opposite of the result, add -3, and find the opposite of the new result. My result is -3. What is the original number? B: Judy wants to do the activity in part (a) with her classmates. Each classmate ...
*Thursday, September 25, 2014 at 4:04pm*

**Math--3 questions. Plz help.**

3. Write a numerical expression to represent the following: Margot took $45 with her to the amusement park. She spent $20 on lunch and spent $5 to rent an inner tube. Then find the sum. 45 + (–20) + (–5); 15 45 + (–20) + 5; 30 (–45) + (–20) + (–5...
*Thursday, September 25, 2014 at 3:04pm*

**Math**

While hiking, Kristen went up 300 feet. If Kristen started at 100 feet above sea level, what is her elevation now? I need help with this question?
*Thursday, September 25, 2014 at 2:27pm*

**Math**

Why would you use square roots in the following question: Chang is participating in a charity bicycle road race. The route starts at Centreville and travels east for 13 km to Eastdale. He then makes a 135° turn and heads northwest for another 18 km, arriving at Northcote. ...
*Thursday, September 25, 2014 at 2:26pm*

**Math**

State the side length of a square with an area of 27 cm2 in simplified radical form.
*Thursday, September 25, 2014 at 1:44pm*

**Math**

What is ^4 square root 1280r^8 t^12 in simplified form?
*Thursday, September 25, 2014 at 1:30pm*

**Math**

Find a scalar equation of the plane that contains the given point P=(-3,-3,1)and the given normal vector n = (-1,4,7)
*Thursday, September 25, 2014 at 1:29pm*

**Math conversion **

21.0cm^3=___in^3
*Thursday, September 25, 2014 at 12:32pm*

**MATH**

1. WHICH SYMBOL WILL MAKE THE NUMBER SENTENCE -|16| ? 16 TRUE? A. = **** B. < C. > 2.WHICH SET OF NUMBER IS FROM LEAST TO GREATEST A. 7,|-4|,-7,0,-|3|,3 B. -|3|,-7,0,3,7,|-4| C. -7,-|3|,0,3,|-4|,7 D. 7,|-4|,3,0,-|3|,-7 3. WHICH SYMBOL WILL MAKE |-6| ? -6 TRUE? A. >...
*Thursday, September 25, 2014 at 12:11pm*

**Math**

Mrs. Warren is making a snack for her class. The recipe calls for chocolate chips and peanuts in a ratio of 4:2. If Mrs. Warren needs 15 cups of the snack, how many cups of the chocolate chips does she need?
*Thursday, September 25, 2014 at 11:25am*

**math**

75ft^2= ___m^2
*Thursday, September 25, 2014 at 11:12am*

**MATH**

How do i find the center of a circle using 3 points. Also need to find the radius and the equation of the circle.... My 3 points are (2,8) (-4,6) (1,-1) I found the Equation of the perpendicular bisector of the line between the first and second point which was y=(3/2)x + 5 And...
*Thursday, September 25, 2014 at 11:07am*

**MATH **

1. WHICH SYMBOL WILL MAKE THE NUMBER SENTENCE -|16| ? 16 TRUE? A. = **** B. < C. > 2.WHICH SET OF NUMBER IS FROM LEAST TO GREATEST A. 7,|-4|,-7,0,-|3|,3 B. -|3|,-7,0,3,7,|-4| C. -7,-|3|,0,3,|-4|,7 D. 7,|-4|,3,0,-|3|,-7 3. WHICH SYMBOL WILL MAKE |-6| ? -6 TRUE? A. >...
*Thursday, September 25, 2014 at 10:57am*

**Math**

0.34divided by 100
*Thursday, September 25, 2014 at 10:23am*

**math**

23456782313%98
*Thursday, September 25, 2014 at 6:58am*

**Math (Quadractic function)**

Hi can you help me find the solution for this one? I have the answers at the end but I want to study how did it end with that. Thanks :) The number N of bacteria in a refrigerated food is given by N(T) = 10T^2 - 20T + 600, 1 ≤ T ≤ 20 where T is the temperature of ...
*Thursday, September 25, 2014 at 6:48am*

**math**

Evaluate the following expression using BODMAS rule (90/3*3+5)/(-2*3+9)
*Thursday, September 25, 2014 at 4:32am*

**Please Help! Math**

How to find the center and radius of a circle using 3 points... My 3 points are (2,8) (-4,6) (1,-1) I found the Equation of the perpendicular bisector of the line between the first and second point which was y=(3/2)x + 5 And the Equation of the perpendicular bisector of the ...
*Thursday, September 25, 2014 at 1:52am*

**math**

A boy of height 95 cm is walking away from base of a lamp post at a speed of 1.5 m/s.If the lamp post is 3.8 m above the ground, find the length of his shadow after 5 seconds.
*Thursday, September 25, 2014 at 12:29am*

**Math questions?**

Write a numerical expression to represent the following: Margot took $45 with her to the amusement park. She spent $20 on lunch and spent $5 to rent an inner tube. Then find the sum. 45 + (–20) + (–5); 15 45 + (–20) + 5; 30 (–45) + (–20) + (–5...
*Thursday, September 25, 2014 at 12:07am*

**Oliver Springs**

Please help,Math,Problem;John and George together raked 7/8 of the yard. John raked 3/4 of that amount. What part of the yard did John rake?
*Wednesday, September 24, 2014 at 11:36pm*

**Math**

which two square roots are used to estimate 47? I think its the square root of 49 and 36.
*Wednesday, September 24, 2014 at 11:25pm*

**Math**

A souvenir consisting of a cube with an inserted sphere is made to represent Earth. Both pieces are made out of solid crystal. The sphere replaces one quarter of the volume of the cube. Calculate the volume of the souvenir piece. The sphere has diameter of 4 cm and the cube ...
*Wednesday, September 24, 2014 at 11:13pm*

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