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March 29, 2015

March 29, 2015

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**Math**

Express the function in the form f o g. (Use non-identity functions for f and g.) G(x)= cube root of (x/(9+x)) {f(x),g(x)}=?
*Wednesday, January 28, 2015 at 9:54pm*

**Math **

Find f o g o h f(x)= sqrt(x-5), g(x)=x^2, h(x)=x^3+6
*Wednesday, January 28, 2015 at 9:51pm*

**math**

After Khalil gave Benjamin 3/5 of the rocks in his collection, Benjamin had 70 rocks. If Benjamin had 25 rocks in the beginning, how many rocks did Khalil have in the beginning?
*Wednesday, January 28, 2015 at 9:30pm*

**Math**

Lela and pepe are playing a video game. The game scores are a ratio of 1:5. Lela completes a quest and earns 48 points. Their score ratio is now 5:9. What is pepe's score?
*Wednesday, January 28, 2015 at 9:22pm*

**Math**

What is 4+ 1000000.
*Wednesday, January 28, 2015 at 9:18pm*

**Math**

A variable star is one whose brightness alternately increases and decreases. For one such star, the time between periods of maximum brightness is 5.6 days, the average brightness (or magnitude) of the star is 5.5, and its brightness varies by ±0.30 magnitude. Find a ...
*Wednesday, January 28, 2015 at 9:16pm*

**math**

explain the error Janine tells her friend that ordered pairs have an x coordinate of 0 lie on the x axis. She uses the origin as an example. Describe Janine's error. Use a counterexample to explain why Janine statement is false.
*Wednesday, January 28, 2015 at 9:04pm*

**Math**

X-Y=5 X-Y=11
*Wednesday, January 28, 2015 at 8:54pm*

**math**

A roll of ribbon contains 92 inches of ribbon. If you need strips of ribbon 4/5 inches long, how many strips could you cut from this roll?
*Wednesday, January 28, 2015 at 8:52pm*

**math**

You are paid $40 an hour to wash windows. If you have worked for 4 4/5 hour, how much money have you earned?
*Wednesday, January 28, 2015 at 8:50pm*

**Math**

Five sixth plus one third
*Wednesday, January 28, 2015 at 8:02pm*

**Math**

Fred, Burt, Conrad, Otto, and Hugh run a race. All the runners can be taken to have the same level of ability, so it may be assumed that all of the possible orderings of the five runners are equally likely. Express your answers to the questions to two decimals. What is the ...
*Wednesday, January 28, 2015 at 7:52pm*

**math**

If Will gives Molly $9, he will have the same amount of money as her. If Molly gives Will $9, the ratio of the money she has to the money Will has will be 1 : 2. How much money does Will have in the beginning?
*Wednesday, January 28, 2015 at 7:47pm*

**Math**

Sam painted a wall in his. On Monday, he painted half of the wall. He painted 2/3 of the other half on Tuesday, and finished painting the wall o Wednesday. How much of the wall did Sam paint on Wednesday?
*Wednesday, January 28, 2015 at 7:43pm*

**math**

Adrian jogs 3/4 mile each morning. How many days will it take him to jog 3 miles?
*Wednesday, January 28, 2015 at 7:30pm*

**math, algebra**

If Will gives Molly $9 dollars he will have the same amount of money as her. If Molly give Will $9, the ratio of money she has to the money will has will be 1:2. How much money does will have in the beginning? Can you give me an explanation of each step, please? I'm having...
*Wednesday, January 28, 2015 at 7:28pm*

**Math**

A $1,600.00 principle earns 7% interest, compounded semiannually twice per year. After 33 years, what is the balance in the account. My answer is $112,992.00
*Wednesday, January 28, 2015 at 7:26pm*

**Math. **

1. Find the area of the given circle. Round to the nearest tenth. *theres a picture of a circle and the radius is 3.5* A. 22.0 cm *squared* B.38.5 cm *squared* C. 11.0 cm *squared* D. 42.8 cm *squared* 2.Find the circumference of the given circle. Round to the nearest tenth. *...
*Wednesday, January 28, 2015 at 7:15pm*

**Math**

Jose said all of the multiples of 8 are also multiples of 2? Manila said that all the multiples of 8 are also of 4. Who is correct?
*Wednesday, January 28, 2015 at 6:59pm*

**Math**

Find the product 8 1/3 x 3/5 in simplest form Find the product 5 1/2 x 3 1/3 in simplest form Use distributive property to find the product 4 2/5 x 10
*Wednesday, January 28, 2015 at 6:44pm*

**math**

Franklin Furniture Company sells chairs for $110 each and tables for $322 each. Last month the company sold 65 items for a total of $12,450. How many chairs and how many tables did they sell?
*Wednesday, January 28, 2015 at 6:39pm*

**math**

Jessica sold 210 magazine subscriptions during a fundraiser at her school. The subscriptions either cost $23 per year or $45 for two years. Her sales totaled $6,150. How many one-year and how many two-year subscriptions did Jessica sell?
*Wednesday, January 28, 2015 at 6:35pm*

**math**

The Downtown Theater group sold 650 tickets to its latest production. They sold only regular seats and box seats. Regular seats cost $12 each and box seats cost $18 each. Altogether, the theater collected $8,550 in ticket sales. How many regular seats and how many box seats ...
*Wednesday, January 28, 2015 at 6:31pm*

**Math**

In triangle ABC, the degree measure of angle A is 20 degree greater than the degree measure of angle B. Angle C is a right angle. What is the measure of angle B? Is it 70 degrees. 90-20=70
*Wednesday, January 28, 2015 at 6:30pm*

**Math**

A bamboo plant grew 3 feet and 6 inches in 3 days. If the plant grew the same amount each day. how many inches did plant grow each? 12 x3=36 36+6=42 42*3=126 126 inches
*Wednesday, January 28, 2015 at 6:01pm*

**math**

limit of x approaches -3. (2x^2 + 4x + 1)
*Wednesday, January 28, 2015 at 5:50pm*

**math**

9 feet equal how many inches
*Wednesday, January 28, 2015 at 5:30pm*

**math**

For every cup of seltzer you use, how much orange juice do you use?
*Wednesday, January 28, 2015 at 5:20pm*

**Math**

You are buying a fence to enclose a garden that has an area of 360 square feet. x + 9 The bottom of garden x side of garden a) What is the width of the area to be enclosed? Answer in units of ft b) How much fencing do you need? Answer in units of ft
*Wednesday, January 28, 2015 at 5:18pm*

**math**

1. How many milligrams (mg) are equal to 1000 micrograms (mcg)? 2. How many pounds (lb) are in one kilogram (kg)? 3. How many milliliters (mL) are in 1/2 of a household measuring cup? 4. Which of the following is an example of a correct conversion factor? a 50 ml/1oz b 1 cup/...
*Wednesday, January 28, 2015 at 5:08pm*

**math**

how many pounds are in one kilogram round to nearest tenth
*Wednesday, January 28, 2015 at 5:05pm*

**Math **

Monica paid sales tax of $1.50 when she bought a new bike helmet. If the sales tax was 5% how much did the store charge for the helmet before tax?
*Wednesday, January 28, 2015 at 4:45pm*

**help math algebra**

How do you find the GCF (greatest common factor) of -m^8n^4 and 3m^6n?
*Wednesday, January 28, 2015 at 4:33pm*

**math-algebra**

How do you find the GCF (greatest common factor) of -m^8n^4 and 3m^6n?
*Wednesday, January 28, 2015 at 4:03pm*

**Math**

In the equation c=9h, identify which variable is the independent variable and which is the dependent variable.
*Wednesday, January 28, 2015 at 4:00pm*

**Math**

Find the exact value: cos(pi/16)cos(3pi/16)-sin(pi/16)sin(3pi/16)
*Wednesday, January 28, 2015 at 3:58pm*

**Math 20-1**

The length of a rectangle is 5 cm more than its width. What are the possible dimensions of the rectangle if the area must be at least 84 cm^2? (2 marks)
*Wednesday, January 28, 2015 at 3:55pm*

**Math 20-1**

What is the solution for 2x^2-7x > always greater than -3 ? (2 marks) (Show your work)
*Wednesday, January 28, 2015 at 3:55pm*

**Math**

The product of 0.15 an an unknown factor is 1.38. What is the unknown factor?
*Wednesday, January 28, 2015 at 3:50pm*

**math**

Mr. Smith’s first period class had an average of 90% on the first test, and his 4th period class had an average of 82%. If there were 30 people in his first class, and 22 in his second, what is the average score of someone in his class?
*Wednesday, January 28, 2015 at 3:49pm*

**math**

AB = 8 cm, AC = 6 cm, AD = 7 cm, CD = 2.82 and CAB =50°. Find the length BC, angle ABC, angle CAD , area of triangle ACD.
*Wednesday, January 28, 2015 at 1:46pm*

**math **

11>2y-15
*Wednesday, January 28, 2015 at 12:46pm*

**math**

A circle has an area of 154cm2 what is the diameter of the circle
*Wednesday, January 28, 2015 at 12:04pm*

**Math**

A hardware store will deliver up to 6 items for a $25 delivery charge. There is a charge of $4 for each additional item to be delivered. Write a piecewise function for the cost of having x items delivered. I understand the answer is 25 for x <= 6 and 4x + 1 for x > 6. ...
*Wednesday, January 28, 2015 at 11:58am*

**MATH**

Two Trains are leaving Kansas City at noon. One is traveling northeast at 38MPH. The other is heading west at 46KPH. At what time in Los Angeles will the trains be 214 miles apart?
*Wednesday, January 28, 2015 at 11:41am*

**math**

19 > - n/5 + 9 3x + 4 < 19
*Wednesday, January 28, 2015 at 11:27am*

**Math**

What is -a^-2 if a equals -5
*Wednesday, January 28, 2015 at 11:19am*

**Math, trignometry,Algebra**

The curve y=sin(x)+pi/2 will experience which transformation from the function y=sin(x) 1)A shift pi/2units right 2)none of the above 3)A shift pi/2 united down 4)A shift pi/2 units up 5)A shift pi/2 units left
*Wednesday, January 28, 2015 at 11:05am*

**math**

A jug of milk holds 4 quarts. How many liters of milf does the jug hold. Round to the nearest hundredth of a liter. 1L= 1.06 qt A) 0.27 L B) 3.77 L C) 4.24 L D)5.06 L not sure on this one Garrett is 64 in tall. How many centimeters tall is he? Round your answer to the nearest ...
*Wednesday, January 28, 2015 at 10:46am*

**Math**

What decimal represents the probability that the spinner will stop on an orange section?
*Wednesday, January 28, 2015 at 10:16am*

**Math**

Find the equation of the line, with the given properties, in slope-intercept form. Slope=−4, through (722;7,7) The equation of the line is .
*Wednesday, January 28, 2015 at 10:08am*

**Math**

Hello! Can you check my answers for these 4 worksheet questions? Thank you in advance (: 1. The following ordered pairs give the scores on two consecutive 15-point quizzes for a class of 18 students. (7, 13), (9, 7), (14, 14), (15, 15), (10, 15), (9, 7), (14, 11), (14, 15), (8...
*Wednesday, January 28, 2015 at 10:01am*

**math**

5+c/9=31 9-n/5=19
*Wednesday, January 28, 2015 at 9:53am*

**math**

27=-2y+15
*Wednesday, January 28, 2015 at 9:48am*

**Math**

The area, A cm3 , of a circle increases at a constant rate of 2 cm2 ´ s -1 . If the initial area of A is 1 cm2 , show that the radius of the circle at time t is given by r=sqrt( 2t+1/ pi) sqrt on both denominator and numerator
*Wednesday, January 28, 2015 at 8:56am*

**Math**

The volume, V cm3 , of a cone height h is (pi)(h^3)/ 12. If h increases at a constant rate of 0.2 cm/sec and the initial height is 2 cm, express V in terms of t and find the rate of change of V at time t.
*Wednesday, January 28, 2015 at 8:53am*

**Math**

The volume, V cm3 , of a cube at time t seconds is given by V=(4 + 1/3t)^3 find the rate at which its volume is increasing at the instant when t = 2.
*Wednesday, January 28, 2015 at 8:52am*

**Math**

The amount of water,V cm3 , in a leaking tank at time t seconds is given by V = (15-t)^3 for 0<=t<=15 Find the rate at which the water leaves the tank when t = 4.
*Wednesday, January 28, 2015 at 8:50am*

**Math**

The radius, r cm , of a spherical balloon at a time t seconds is given by r = 3 + 2 / (1+t) What is the initial radius? Find the rate of change of r (w.r.t.t) when t=3
*Wednesday, January 28, 2015 at 8:49am*

**Math**

The length, l mm of an elastic string at time t seconds is given by l=t^3 / 3 - 4t +10 Find the instants (that is, the value of t ) when a) The length is increasing at a rate of 5 mm/Sec b) The length is decreasing at a rate of 4 mm/Sec
*Wednesday, January 28, 2015 at 8:47am*

**Math**

The radius r (cm) of a circle at time t seconds is given by r = 9t - t^3 . At each of the following instants, find the rate of change of the radius (w.r.t.'t') and state whether the radius is increasing or decreasing at these instants. a) t =1 b) t =2 c) t =2.5
*Wednesday, January 28, 2015 at 8:44am*

**Math**

A rectangle has sides of length x cm and 2x - 4cm and the length x cm at time t seconds is given by x = 2 + 3t, (t>=0) . Show that the area, A cm^2 , the rectangle, in terms of t is A =12t + 18t^2 . Hence find the rate of change of the area at the instant when t = 2.
*Wednesday, January 28, 2015 at 8:40am*

**Math**

The radius, r cm, of a circle at time t seconds is given by r = 2t 2 + 1. Express its area, A cm2 , in terms of t and find the rate of change of the area at the instant when t=2. (Leave your answer in terms of p )
*Wednesday, January 28, 2015 at 8:38am*

**Math**

Water is poured steadily into an empty container. If the volume of water in the container after 5 seconds is 30 cm3 , find a) The rate of change of volume b) The volume of water after 12 seconds
*Wednesday, January 28, 2015 at 8:37am*

**math**

-32 is < or = to 24 - 2f 5+c/9 is > or = to -31
*Wednesday, January 28, 2015 at 7:40am*

**Math 6 grade**

If you need to find the percent of a number, explain how you can predict whether the part will be less than, greater than, or equal to the number. HELP PLEASE
*Wednesday, January 28, 2015 at 7:06am*

**math**

Prove the identity (sinx+cosx)^2 = 1+sin2x Thank you
*Wednesday, January 28, 2015 at 3:00am*

**math **

Bronze is an alloy or mixture of the metals copper and tin. The properties of bronze depends on the percentage of copper in the mix. A chemist decides to study the properties of a given alloy of bronze as the proportion of copper is varied. She starts with 7 kg of bronze that ...
*Wednesday, January 28, 2015 at 1:36am*

**math **

B . . . . . . . . . . . . . . C A Triangle ABC is right angled at A. The area of triangle is = ½bh. The area of the triangle is 3/2x^2 + 10x + 16cm^2 where x is a positive integer. The area of the triangle ABC can be written in the form 1/2 (x+a)(bx + c) . The value of ...
*Wednesday, January 28, 2015 at 12:55am*

**math**

The scale on a map i 1cm to 4km What does 4cm on the map represent ?
*Wednesday, January 28, 2015 at 12:51am*

**math **

An open box is to be made from a flat square piece of material 20 inches in length and width by cutting equal squares of length x from the corners and folding up the sides. (a) Write the volume V of the box as a function of x. Leave it as a product of factors; you do not have...
*Wednesday, January 28, 2015 at 12:33am*

**Math. Just checking**

Just making sure because im doing h.w over scientific notations and I know how to do them.. I'm just checking if I'm right.. in scientific notations the number has to be between 1 and 10 right?
*Wednesday, January 28, 2015 at 12:21am*

**Math **

1. is line "L" parallel to line "M"? *picture of a transversal.. lines L and M don't touch and one line crosses through line L and M to create a transversal. angles 124 and 118 are on the bottom left side of the transversal* I tried my best to explain ...
*Tuesday, January 27, 2015 at 11:33pm*

**math**

Karyn cuts a length of ribbon into 4 equal pieces, each 1 1/4 feet long. How long was the ribbon?
*Tuesday, January 27, 2015 at 11:17pm*

**Math**

find the sum of the interior angles of a nonagon. I know a nonagon has 9 sides.. A. 140 degrees B. 1,620 degrees C. 1,260 degrees D. 1,450 degrees If the question is asking for each interior angle then I think the answers A but if it's asking for the sum of ALL the ...
*Tuesday, January 27, 2015 at 10:44pm*

**Math**

If you need to find the percent of a number, explain how you can predict whether the part will be less than, greater than, or equal to the number.
*Tuesday, January 27, 2015 at 10:30pm*

**math**

Barb is making a bead necklace. She strings 1 white bead, then 3 blue beads, then 1 white bead, and so on. Write the numbers for the first eight beads that are white. What is the rule for the pattern?
*Tuesday, January 27, 2015 at 9:57pm*

**Math**

The average size 8 shoe is approximately 8 1/2 inches plus or minus a quarter of an inch . Write and solve an absolute value inequality that shows the range of possible lengths of a person'a foot that would wear a size 8.
*Tuesday, January 27, 2015 at 9:46pm*

**math**

Two coworkers picked up some writing instruments at the office supply store. Shane selected 3boxes of pencils and 1box of pens, paying $8. Terrell spent $6 on 1box of pencils and 1box of pens. What's the equation for shanes total cost? Equation for Terrell total cost? Thanks
*Tuesday, January 27, 2015 at 9:44pm*

**Math**

Number of packages of red peppers to number of packages of green packages is ratio of 8:13. Peppers are sold in 2-pound packages. What is the least possible weight of red peppers in bin?
*Tuesday, January 27, 2015 at 9:44pm*

**Math**

How many feet across is a circular playground that has a fence
*Tuesday, January 27, 2015 at 9:43pm*

**Math**

Ratio of tickets Mark to Julia is 4:3. Julia has 36 tickets. How many tickets did they have together?
*Tuesday, January 27, 2015 at 9:40pm*

**math 4th grade**

llene is making smoothies. The recipe calls for1 1/4 cups of strawberries. How many cups of strawberries, written as a fraction greater than one, are used in the recipe?
*Tuesday, January 27, 2015 at 9:23pm*

**Math**

Hector gas tank was 3/4 full. What percent was emdpty
*Tuesday, January 27, 2015 at 9:07pm*

**Math**

A piece of wire 27/32 inches in length is cut into 3 equal pieces . How long is each piece 27/32 , 3/1 =81/32 =27 Is this right
*Tuesday, January 27, 2015 at 8:59pm*

**Math**

Alana spent $21 of her $300 paycheck on a gift. What percent of her paycheck was spent on the gift?
*Tuesday, January 27, 2015 at 8:45pm*

**math**

6y-15+8=2y 75=m/3+10 10x-16=14
*Tuesday, January 27, 2015 at 8:39pm*

**math**

3x + 4 < 19 5 +c/9(greater than/equal)-31
*Tuesday, January 27, 2015 at 8:31pm*

**Calculus II (Math)**

integral of 5e^(-0.7x)
*Tuesday, January 27, 2015 at 8:28pm*

**Math**

Of the coins in Tricia's bank, 5/7 are quarters. If Tricia has 95 quarters in her bank, how many coins does she have in all. Is this correct? 5/7*x = 95 (7/5)(5/7)*x = 95 x= 95*7/5 95x7 = 665 665/5=133 x=133 Thanks from a Grandma helping w/4th grade math
*Tuesday, January 27, 2015 at 7:46pm*

**math**

A store has 300 televisions on order and 80% are high definition. How many televisions on order are high definition?
*Tuesday, January 27, 2015 at 7:44pm*

**math**

Mindi planted beans in 4/10 of her garden. What fraction of the garden has beans or peas?
*Tuesday, January 27, 2015 at 7:42pm*

**math**

andrew read 24 pages of a book on Monday. He read 5/12 of the book on Monday and completed the remaining 1/4 on Tuesday. How many pages are in the book?
*Tuesday, January 27, 2015 at 7:31pm*

**Math**

The area of a parallelogram is 84 cm² the base of the figure is 12 cm what is the height?
*Tuesday, January 27, 2015 at 7:18pm*

**Math**

Will I use the distance formula for this problem. A airplane traveling at 390 km/hr in still air encounters a 65 km/hr headwind. How long will it take the plane to travel 725 km into the wind? 390=r*65
*Tuesday, January 27, 2015 at 7:08pm*

**Math**

Directions: Find the Location on Unit Circle, Period & General Solution for this problem>>>>>>> sin^2x=3cos^2x What I have so far: sin^2x=3cos^2 sin^2x/cos^2=3 tan^2x=3 tanx=+and- sqrt3
*Tuesday, January 27, 2015 at 6:09pm*

**Math**

The average size 8 shoe is approximately 8 1/2 inches plus or minus a quarter of an inch . Write and solve an absolute value inequality that shows the range of possible lengths of a person'a foot that would wear a size 8.
*Tuesday, January 27, 2015 at 6:06pm*

**Math **

At a parade 1/4 of the participants have red hair, 1/6 of them have brown hair, and the rest of the participants have black hair. What fraction of the participants have black hair?
*Tuesday, January 27, 2015 at 6:02pm*

**Math**

Madison buys 2 3/5 pounds of meat. Her neighbor buys 3/4 pound more meat than Madison. How many pounds of meat do they buy altogether?
*Tuesday, January 27, 2015 at 5:57pm*

**Math**

Leena bakes a loaf of bread. She eats 1/8 loaf of bread and give 1/6 of it each of her 3 friends. What fraction of the loaf of bread is left?
*Tuesday, January 27, 2015 at 5:56pm*

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