Wednesday

November 26, 2014

November 26, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**English**

Hello! Can you tell me if I corrected these sentences properly? My answers are below each sentence I'm supposed to punctuate. Instructions/Hint: Semi-colons 1. The baby smelled like lavender, and she just had a bath. The baby smelled like lavender; she just had a bath. 2. ...
*Monday, November 17, 2014 at 12:11pm*

**math**

use the appropriate formula to find the amount for the investment. For (a) and (b) please round the answer to the nearest cent. $13,600 for 5 years at 4.5% compounded semiannually.
*Monday, November 17, 2014 at 8:28am*

**math**

use the appropriate formula to find the amount for the investment. For (a) and (b) please round the answer to the nearest cent. $13,600 for 5 years at 4.5% compounded semiannually.
*Monday, November 17, 2014 at 8:27am*

**math**

A three- digit number is eleven times the two-digit formed by using the hundreds and the units digit of the three - digit number respectively, in the tens and units place of the two - digit number. If the difference between the digit in tens place and the digit in hundreds ...
*Monday, November 17, 2014 at 6:03am*

**math**

There are 10 children (aged 1 to 10 years) who have equal amounts of money. In the first transaction the eldest child gives one rupee to every child younger to him. In the second transaction, the second eldest child gives one rupee to every child younger to him. This type of ...
*Monday, November 17, 2014 at 4:57am*

**Math**

Solve the nonlinear system by substitution {2x+y=5 {x^2+y^2=50
*Monday, November 17, 2014 at 2:40am*

**math (algebra)**

explain how to evaluate an expression with a variable when you are given a value for the variable
*Monday, November 17, 2014 at 1:24am*

**Math**

A jewelry box is designed such that its length is twice its width and its depth is 2 inches less than its width. The volume of the box is 64 cubic inches. Use synthetic division to find the roots of the polynomial equation. Are the roots all rational numbers? Ans: Yes, the ...
*Monday, November 17, 2014 at 1:05am*

**Chemistry **

Help needed with a calorimeter lab. I have to measure the enthalpy of a neutralization reaction between NaOH and HCl as well as find the concentration of NaOH the following ways. - using the mass and volume of NaOH - Using calorimetric data assuming no heat lost to calorimeter...
*Monday, November 17, 2014 at 12:36am*

**math**

A power station is on one side of a river that is 3/4 mile wide, and a factory is 8 miles downstream on the other side of the river. It costs $24 per foot to run power lines over land and $30 per foot to run them under water.(1 mile = 5280 feet) Write the total cost C to run ...
*Sunday, November 16, 2014 at 11:11pm*

**Math**

Find all possible rational roots using the rational root theorem. x^4 - 3x^2 + 12 = 0 Plus/minus 1, 2, 3, 4, 6, 12?
*Sunday, November 16, 2014 at 10:38pm*

**math**

solve for x x+√(31-9x)=5
*Sunday, November 16, 2014 at 10:31pm*

**math**

How do i find solutions to 20x^3-125x=0?
*Sunday, November 16, 2014 at 10:25pm*

**MATH 101**

Solve the equation. You will have three solutions. X^3-8=0
*Sunday, November 16, 2014 at 10:24pm*

**MATH 101**

Find f(x)if f(3) = 0 and f(−4) = 0.
*Sunday, November 16, 2014 at 10:23pm*

**math**

How do I solve x^2+2x+4>0 and what does the solution tell you?
*Sunday, November 16, 2014 at 10:22pm*

**Math**

Find all possible rational roots using the rational root theorem. 3x^3 + 2x^2 - 1 = 0 plus/minus 1/3 and plus/minus 1?
*Sunday, November 16, 2014 at 10:15pm*

**math**

how many cubic inches in 7'8"L, 12'2"W, 10'1" tall? please show how you get to the answer. I added up the feet (7+12+10=29 ft) and multiplied by 12 inches (29x12=348 in), then added on the remaining inches (8+2+1=11, 348+11) to come up with an answer...
*Sunday, November 16, 2014 at 10:13pm*

**Math**

Find the value of b, if any, that will make the function differentiable at x = 0 g(x)= { x+b, x<0 cos(x), x≥0 can you help, I got 0 but I don't know if that will make the function differential at x=0.
*Sunday, November 16, 2014 at 9:41pm*

**Math help/check**

Suppose the functions f and g and their derivatives have the following values at x = 1 and x = 2. Let h(x) = f(g(x)). Evaluate h′(1). X | f(x) G(x) f'(x) g'(x) ____________________________ 1 | 8 2 1/3 -3 2 | 3 -4 2π 5 My answer: -6π
*Sunday, November 16, 2014 at 9:28pm*

**math**

52.36*0.3*5.65
*Sunday, November 16, 2014 at 9:20pm*

**Math**

The inflection point of the curve y = x4 − 8x3 + 24x2 + 7x − 3 is? So I got (1,21) I was wondering if this is correct because sometimes I will be doing something completely wrong and not even realize it.
*Sunday, November 16, 2014 at 9:19pm*

**math**

52.36*0.3*5.65?
*Sunday, November 16, 2014 at 9:14pm*

**Math**

Complete number line from 0 to 3 in thirds. In fractions.
*Sunday, November 16, 2014 at 9:04pm*

**math**

find the volume triangular pyramid: triangle base 20mm triangle height 22mm, pyramid height 14mm
*Sunday, November 16, 2014 at 8:59pm*

**Math**

Surveyors with a highway planning crew measure a section of proposed roadway to be 4.4 km. They measure the angle of inclination over the 4.4 km to be 8.5 degrees. Determine the change in altitude for drivers travelling from one end to the other. Answer to the nearest whole ...
*Sunday, November 16, 2014 at 8:23pm*

**math**

I need to figure coupon code. Code is 5 43000 18670 6. Do i subtract the 5 or add?
*Sunday, November 16, 2014 at 8:20pm*

**math**

Rainbow Harbor Cruises charges $16/adult and $8/child for a round-trip ticket. The records show that, on a certain weekend, 1400 took the cruise on Saturday and 1000 took the cruise on Sunday. The total receipts for Saturday were $18,400, and the total receipts for Sunday were...
*Sunday, November 16, 2014 at 8:15pm*

**sixth grade math**

Lindsay ate 7/8 of an apple. what percent of the apple did he eat? My answer is 875%. Is the answer 875% or 87.5%.
*Sunday, November 16, 2014 at 8:12pm*

**math**

the movie theater had 52 more occupied seats than empty seats. there are a total of 320 seats in the theater. How many seats were occupied?
*Sunday, November 16, 2014 at 8:06pm*

**math**

A farmer has twice as many chickens as ducks. After selling 166 chicken and 29 ducks, he has twice as many ducks as chickens. How many chickens did he have to start??
*Sunday, November 16, 2014 at 7:57pm*

**sixth grade math**

Lisa hiked 7 miles of a 21-mile trail. What percent of the trail did she hike?
*Sunday, November 16, 2014 at 7:26pm*

**math**

4 multiple choice questions with 3 possible answers. What is the probability of answering the first, third, and fourth question correctly? 1/3 x 1/3 x 1/3 1/3 = 1/81
*Sunday, November 16, 2014 at 6:37pm*

**Math Elementary Linear Algebra**

determine whether or not the given set forms a basis for the indicated subspace: #1 {1,1,0), (1,1,1)} for the subspace of R^3 of all (x,y,z) such that y= x+z #2 {[1,2,-1,3), (0,0,0,0)} for the subspace of R^4 of all vectors of the form (a,b, a-b,a+b) and #3 {(2,0,2), (1,1,1)} ...
*Sunday, November 16, 2014 at 6:17pm*

**math**

when a traffic light turns green, a car accelerates at a constant rate, the decelerates in the same manner to stop at the next traffic light. The speed of the car, s, is given by the equation, s=-10 /t-8/ + 80 where t is time. Find the time , t, it takes for the car to reach ...
*Sunday, November 16, 2014 at 6:13pm*

**Math 6th**

Andy ran a 5-kilometer race in 40 minutes. If Andy maintains that same place, how many kilometers did Andy run In 1 hour?
*Sunday, November 16, 2014 at 6:08pm*

**math fractions**

•math - Ms. Sue, Sunday, November 16, 2014 at 12:39pm 12 •math - bob, Sunday, November 16, 2014 at 12:56pm Ms. Sue can you tell me how you got that answer please. •math - Ms. Sue, Sunday, November 16, 2014 at 1:09pm Multiples of 6: 6, 12, 18, 24 Multiples of 4: ...
*Sunday, November 16, 2014 at 6:05pm*

**Math**

An equilateral triangle is inscribed in a circle. If the radius of the circle is 10 cm, calculate the length of a side of the triangle. Answer to nearest whole centimetre
*Sunday, November 16, 2014 at 6:02pm*

**Math**

Solve (16x^2)^-3/4 Please help using step by step. I don't understand how to do this. Thank you
*Sunday, November 16, 2014 at 5:07pm*

**Math**

A photocopy was made of Julie's watercolor painting. the photocopy resized the painting so that it measured 4 inches wide by 7 inches long. If the actual painting is 16 inches wide, what is the length?
*Sunday, November 16, 2014 at 5:01pm*

**math**

A cylindrical water tank has a diameter of 1.2 m and a height of 1.5 m.How many liters of water can it hold the nearest liter?
*Sunday, November 16, 2014 at 4:56pm*

**Math **

show that the set of all m-vectors whose first components is 0 (of R^m)
*Sunday, November 16, 2014 at 4:46pm*

**Elementary Math**

Miriam is four years older than Ricardo. Ten years ago Miriam was 3 times as old as Ricardo was then. How old are they now?
*Sunday, November 16, 2014 at 4:41pm*

**Math:Algebra**

Maya has 2 times as many apples as Ally if Ally has 87 apples how many apples dose Maya have now? Maya's sister takes some away. Write an algebraic expression that represents the amount of apples they have now?
*Sunday, November 16, 2014 at 4:35pm*

**Math**

An airplane travels 226 miles in 2 hours. At that rate, how far will the airplane travel in 8 hours?
*Sunday, November 16, 2014 at 4:14pm*

**Math**

The tank is 1/2 full of water. The. A spherical wrecking ball with radius of 2ft is dropped into the tank. How far will the water level rise once the sphere is completely submerged? I cant figure it out. I've been trying for two days now. And its due..
*Sunday, November 16, 2014 at 3:54pm*

**Math**

Connie wants to have an annuity payment of $2,000 at the END of every three months. How much should she deposit now at 6% interest, compounded quarterly, to yield this payment for 3 years?
*Sunday, November 16, 2014 at 3:46pm*

**Math**

Your bank pays 9% interest, compounded annually. Use the appropriate formula to find how much you should deposit now to yeild an annuity payment of $800 at the END of each year, for 10 years?
*Sunday, November 16, 2014 at 3:41pm*

**math**

which lap has the slowest time out of these- 1.59, 1.85, or 1.64
*Sunday, November 16, 2014 at 3:35pm*

**math**

Is this correct- 0.685 x 100 =68.5
*Sunday, November 16, 2014 at 3:33pm*

**Math **

Joan ran for 2.25 hours burning 3075.5 calories per hour how many total calories does he burn
*Sunday, November 16, 2014 at 3:19pm*

**Math (calculus)**

Prof gave us this question to practice but I do not know how to solve it. If you know please provide step by step with the answer so I can understand it. Thank you very much :) Suppose a rocket is launched from the ground with 10 seconds worth of fuel. The rocket has an upward...
*Sunday, November 16, 2014 at 2:32pm*

**Probabilitys Math**

After the last game of the season a football team goes out for ice cream. Each player orders a triple cup of ice cream with a topping.Each order has 3 diffrent flavors, order doesnt matter.The shop has 7 diffrent flavors and 2 toppings to choose from iss it possible for each ...
*Sunday, November 16, 2014 at 2:03pm*

**math**

A zoo kitchen's weekley grocery list shows the zoo orders 56 pounds of bannas each week.The zoo kitchen uses the same number of pounds of bannas each day.
*Sunday, November 16, 2014 at 1:48pm*

**Math**

Yes, it is I again, with yet another math problem. The question is; In a bag, there are 8 white marbles, 8 blue marbles, 7 red marbles, and 6 yellow marbles. How many marbles does it take to pull out 3 marbles of the same color. (A)6 (B)9 (C)12 (D)15 (E)I forgot the last one I...
*Sunday, November 16, 2014 at 1:20pm*

**math**

Tom is making meatloaf with 3/4 pound of turkey and 5/6 pound of ground beef. What is the LCM he should use to find the total number of pounds of meat? How many pounds of meat will be in the meat loaf? Show your work Completely.
*Sunday, November 16, 2014 at 12:35pm*

**math**

What is the GCF of 8 and 24? What is the LCM of 8 and 24?Write the sum of 8 + 24 as the product of its GCF and another sum.
*Sunday, November 16, 2014 at 12:27pm*

**math **

Darion needs 20 pieces of string 3/8 inch in length .He cut a 4 7/8 inch piece of string into pieces that are 3/8 of a inch long each. How many more pieces of string does he need?
*Sunday, November 16, 2014 at 12:05pm*

**Math**

In a coordinate plane, Brittany labeled the coordinates for point m as (-31/2,2). Sade tells Brittany to reflect point m over the x axis to point r. What are the coordinate of point r?
*Sunday, November 16, 2014 at 12:04pm*

**MATH**

The table below represents the volume of a liquid sample as a function of its temperature: Temp (C) Volume (ml) x f(x) 11 95 16 100 21 105 26 110 The average rate of change of f(x) between x=11 to x=21 is _____ ml per C ((degrees)) and represents the rate of change of volume ...
*Sunday, November 16, 2014 at 11:54am*

**Math**

16 dogs share a bowl of food. Each dog eats half a cup. Write & solve a division equation to find how much dog food was in bowl. Would this be c=16/2 c=8 (c=cups) Thanks for your help.
*Sunday, November 16, 2014 at 11:53am*

**math/fractiom**

One-fifth of your art-supply money goes for brushes. If you also spend 1 2 of your money on paint, what fraction of your money will you have left?
*Sunday, November 16, 2014 at 12:49am*

**1210 Math**

A projectile follows a parabolic path whose height, in meters, is given by the function f(x) =-x^+2x+2, find the maximum horizontal distance that the projectile may cover
*Sunday, November 16, 2014 at 12:17am*

**Business Math**

How is math and recycling related?
*Sunday, November 16, 2014 at 12:11am*

**Math**

How is math and recycling related?
*Sunday, November 16, 2014 at 12:07am*

**Math (Algebra 1)**

Juan’s first 3 exam scores are 85, 93, and 87. What does he need to score on his next exam to average 90 for all 4 exams? let x represent the score on his next exam (put this in a multi-step equation) PLEASE HELP
*Saturday, November 15, 2014 at 10:48pm*

**Math**

I am in 6th grade but to me, that doesn't matter because I have high hopes for myself. My question is; How many distinct letter arrangements can be made from the word LETTER with each T on each side? (A) 6 (B) 12 (C) 24 (D) 120 (E) 720 I think it is 24 because if an ...
*Saturday, November 15, 2014 at 9:02pm*

**Math**

A road rises 1m for every 15m measured along the road. a. What is the angle of inclination of the road to the nearest degree? b. How far does a car travel horizontally when it travels 15m along the road? Give the answer to the nearest tenth of a metre.
*Saturday, November 15, 2014 at 6:49pm*

**Math**

If 3/8 of my money is 12.00 how much money do I have
*Saturday, November 15, 2014 at 6:49pm*

**math fractions**

Brent divided 3 1/5 by a number and got 4 1/2. What number did he divide by?
*Saturday, November 15, 2014 at 5:33pm*

**Math**

Suppose that a water wheel has a radius of 22 feet and makes a complete revolution every 14 seconds. The bottom of the water water wheel is 1 foot above the ground level. One step of the water wheel is painted red to be able to determine the amount of time for one complete ...
*Saturday, November 15, 2014 at 4:13pm*

**math**

The volume of a pyramid varies jointly with the base area of the pyramid and its height. The volume of one pyramid is 24 cubic inches when its base area is 24 square inches and its height is 3 inches. What is the volume of a pyramid with a base area of 10 square inches and a ...
*Saturday, November 15, 2014 at 3:54pm*

**math**

Melina walked her dog 2 1/5 miles. Cathy walked her dog 1 3/4 times as far as Melania did. How many more miles did Cathy walk her dog?
*Saturday, November 15, 2014 at 3:46pm*

**math**

Let X be a Binomial random variable with parameters n and 0 < p < 1. Show that lim E(1 + X) · E(1/1 + X)= 1. n→∞
*Saturday, November 15, 2014 at 1:40pm*

**math**

cuboid dimension 3in x 12in x 4in wrapped present has two loops of ribbon around it. each loop goes completely around the box once and always runs down the middle of a face. The two loops overlap each other at a right angle, but ends of the ribbon do not overlap when making ...
*Saturday, November 15, 2014 at 12:50pm*

**math**

find the inverse. f(x)=√3+4
*Saturday, November 15, 2014 at 12:03pm*

**Math**

Can a trend line go on forever if so why
*Saturday, November 15, 2014 at 11:31am*

**math**

7 nails has a of 50g how many nails have a mass of 1/2kg
*Saturday, November 15, 2014 at 10:17am*

**math**

barry had a pan of brownies 2/5 full his friends came over and ate 1/4 how much is left
*Saturday, November 15, 2014 at 9:08am*

**math**

solve √ ̅m+3 + √ ̅m-2 =5 (show step by step process of solving the equation)
*Saturday, November 15, 2014 at 4:37am*

**math**

the measure of the sides of a rectangle are ( 4 √ ̅2 - √ ̅3cm) by ( √ ̅6 + 2 cm). Find the measure of its diagonal.
*Saturday, November 15, 2014 at 4:37am*

**MATH**

√ ̅m+3 + √ ̅m-2 =5 How do you call equation like that?
*Saturday, November 15, 2014 at 4:35am*

**math**

if the square root of twice a number is diminished by three, the result is 5. what is the number?
*Saturday, November 15, 2014 at 4:31am*

**math**

a man 5 ft tall casts a shadow of 6 ft. The angle of elevation f the sun is?
*Saturday, November 15, 2014 at 1:11am*

**math**

find the value of the variable that would make the equation true.. 1.) 5x = 15 2.) -3x = 21 3.) 9x = -27 4.) -7x = -12 5.) 2/3 x = 8
*Friday, November 14, 2014 at 11:37pm*

**Math**

Condense the expression to the logarithm of a single quantity. 5lnx-6ln(x+2)
*Friday, November 14, 2014 at 10:42pm*

**Math Help Respond To @Steve**

So for this question: The number of bacteria present in a culture is given by the following model B=1000e^0.276t; where t= time in minutes. Find the time required to have 6000 bacteria present. Then, round your answer to the nearest tenth of a minute; would my answer be 6.5?
*Friday, November 14, 2014 at 10:42pm*

**Math**

What is 8 and 2 over 20 minus 6 and 8 over 20 8 2 - 20 8=? 2=? 20=?
*Friday, November 14, 2014 at 9:29pm*

**math**

a city is served by two newspapers-the Tribune and the Daily News. Each Sunday a reader purchases one of the newspapers at a stand. The following transition matrix contains the probabilities of a customers buying a particular newspaper in a week given the newspaper purchased ...
*Friday, November 14, 2014 at 7:57pm*

**math**

Find the inverse f(x)= -2+7
*Friday, November 14, 2014 at 7:36pm*

**Art Help!**

How is this artistic creation an example of a combination of art and science? It is a picture of an oragomi shrimp made out of brown paper with black eyes. A. It is a creative sculpture of a shrimp. B. It is not anatomically correct. C. It is made with recycled paper. D. It ...
*Friday, November 14, 2014 at 6:49pm*

**math**

(2+3i) / (4-2i)
*Friday, November 14, 2014 at 6:42pm*

**math**

Find the inverse of f(x) f(x)=3-1/2x
*Friday, November 14, 2014 at 6:38pm*

**Math**

Simplify (16x^8)^-3/4 1) 16^-3/4*(x^8)^-3/4 2) -12*x^-6 3) -12*1/x^6 4) -12/x^6 Which step is incorrect? Please help!!
*Friday, November 14, 2014 at 6:34pm*

**Math**

What is an interquartile range? What is a mean absolute deviation?
*Friday, November 14, 2014 at 6:10pm*

**Math Help!**

Sometimes scale drawings are shown on graph paper. Each square on this graph papers is 1/4 inch. Use the scale drawing of the living room to answer each question. Scale= 1/4=18 inches What is the width of the sofa in inches? The sofa has 10 full squares and 5 half squares. A. ...
*Friday, November 14, 2014 at 6:03pm*

**Math**

Simplify (27t^2)^2/3
*Friday, November 14, 2014 at 5:59pm*

**Math Help!**

Sometimes scale drawings are shown on graph paper. Each square on this graph paper is 1/4 inch, Use the scale drawing of the living room to answer each question. What is the lenth of the fireplace in inches? The fireplace has 5 squares. A. 90 inches B. 45 inches C. 180 inches ...
*Friday, November 14, 2014 at 5:50pm*

**MATH**

The average of 30 numbers is 65. If one of these numbers is 65, the sum of the remaining number is... A.65*64 B.30.64 C.29*30 D. 29*64 E. 29 *65 Is it A?? If not, can you explain
*Friday, November 14, 2014 at 5:10pm*

**math**

The average height of 3 students is 68 inches. If 2 of the students have heights of 70 inches and 72 inches respectively, thenw hat is the height (in inches) of the third student?
*Friday, November 14, 2014 at 4:58pm*

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