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February 1, 2015

February 1, 2015

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**Math**

Which of the following is a decreasing function? a. y = 7^x - 2 b. y = 7^-x + 2 c. y = 3(5^x) - 5 d. y = 5(3^x) + 3 What function is the reflection of y = 10^x with respect to the y-axis? a. y = -10^x b. y = (-1/10)^x c. y = 10^-x d. y = -10^x
*Thursday, January 22, 2015 at 5:43am*

**Math**

There were 45 more boys than girls, 4/5 of the boys and 2/3 of the girls passed the test. 49 children failed the test. How many girls were there ?
*Thursday, January 22, 2015 at 4:14am*

**math **

if a man was x yrs old y yrs ago,how old is he z yrs from now? a. 35 b.36 c.38 d none
*Thursday, January 22, 2015 at 3:26am*

**math**

the length of the rectangle is increased by 50% by what percent would the width be increased to keep the same area. a.43/3 b.45/4 c.33-1/3 d.31-1/3
*Thursday, January 22, 2015 at 3:03am*

**Math**

Answer with Always, Sometimes or Never True. Kindly explain why so that I can understand. Thanks. 1. An interior angle and an exterior angle of a triangle are supplementary. 2. The bisector of an angle of an isosceles triangle is also a perpendicular bisector. 3. The sum of ...
*Thursday, January 22, 2015 at 2:53am*

**math**

cristy age 15 years ago equals the sum of 2/9 of her age 15 years hence and 1/6 of her age now. how old is she now?
*Thursday, January 22, 2015 at 2:44am*

**math**

[1+y/(x+y)]/[1-3y^2/(x^2-y^2)] a.x/y-x b.y/x-y c.x-y/y-2x d.x-y/x-2y
*Thursday, January 22, 2015 at 2:43am*

**math**

find the solution set 2x+(3x-(4x-5))=x/4-2 a.28/3 b.-28/3 c.9 d-9
*Thursday, January 22, 2015 at 2:38am*

**math**

the area of rectangle is 192 sq.meter its diagonal is 20 in.Find its length and width.
*Thursday, January 22, 2015 at 2:16am*

**math**

a gardener is making a triangle planting with 35 plants in row ,31 in the second row ,27 in the third row and so on . if the pattern is considered how many plants will be there in the last row?
*Thursday, January 22, 2015 at 2:14am*

**math**

Find the total number of possible squares on the chessboard
*Thursday, January 22, 2015 at 2:02am*

**math **

paul's pizza is having a sale on mozza melts.each order of mozza melts costs $0.99 including 5% tax how much will a customer pay for one order of mozza melts? please help me
*Thursday, January 22, 2015 at 1:49am*

**Math**

a conical vessel 6 meters across the top and 4 meters deep is filled with water. A portion was spilled out by slanting the cone such a way that its slant height is in vertical position. determine the cross section area of the water surface that remains on the tank.
*Thursday, January 22, 2015 at 12:14am*

**Chemistry/Math**

Calculate the following and round to the allowed number of significant figures 1. (18.00 x 1.5) / 0.00625 2.4.61 X 10^3 / 5.1008 x 10^-4 My answers 1. 4320 2. 9.037 x 10^-1 Please explain what I did wrong if I'm incorrect. Thank you
*Thursday, January 22, 2015 at 12:07am*

**Math**

Without looking, George pulls socks from a drawer containing 2 white socks, 3 black socks, and 5 yellow socks. With each pulll, a sock is removed from the drawer and is not replaced. find the probability of drawing a yellow, black, and white sock in that order.
*Wednesday, January 21, 2015 at 11:11pm*

**. 8th grade math **

. Mkay ! So, one molecule of nitrogen reacting w/3 molecules of hydrogen makes 2 of ammonia. How many molecules of nitrogen must react w/42 molecules of hydrogen to make 28,of ammonia?
*Wednesday, January 21, 2015 at 10:54pm*

**Math**

PLEASE SHOW YOUR WORK OR EXPLAIN... Mr. Webb gave his waiter a $5.60 tip on a $40 bill. What percent tip did he give the waiter?
*Wednesday, January 21, 2015 at 10:52pm*

**Math**

If -f(x), or reflection across the x-axis, is done on .7x - 4, then is the new equation -.7x + 4?
*Wednesday, January 21, 2015 at 10:45pm*

**math**

Andes wants to collect data about the preferences of the people who work for him. He wants to pick every fourth person in a list of all employees. Which of the following is the best way to organize the list? Age,pay rats,last name or date of hire? Is the answer by last name??
*Wednesday, January 21, 2015 at 10:31pm*

**Math**

PLEASE SHOW YOUR WORK.. Marty paid $72 for a jacket that had been marked down 20%. Create a linear model to represent this and use it to calculate the original price of the jacket.
*Wednesday, January 21, 2015 at 10:27pm*

**math**

In Carl's drawer, he has white,gray,and black socks. In his closet,he has black brown,and blue shoes. I need to make a diagrdiagram to display the sample space for Carl choosing a sock and shoe color. Is this right White/black,brown blue Gray/black,brown,blue Black/black ...
*Wednesday, January 21, 2015 at 10:25pm*

**Math**

Which of the following is a decreasing function? a. y = 7^x - 2 b. y = 7^-x + 2 c. y = 3(5^x) - 5 d. y = 5(3^x) + 3 What function is the reflection of y = 10^x with respect to the y-axis? a. y = -10^x b. y = (-1/10)^x c. y = 10^-x d. y = -10^x
*Wednesday, January 21, 2015 at 10:20pm*

**Math**

!!PLEASE SHOW YOUR WORK!! My recipe makes 96 cookies, but I'll only need 24 for the party, what will I multiply each ingredient by to make just 24 cookies? Explain.
*Wednesday, January 21, 2015 at 10:17pm*

**Math**

Which function is increasing? a. y = -2^x b. y = 2 (1/2^x) c. y = 3 (4^-x) d. y = -4 (2^x) What is the y-intercept of the function y = 4(2^x) - 2? a. 2 b. -2 c. 4 d. 1 In the function y = 4(3^x) - 1, the graph is asymptotic to ..... a. y = 1 b. y - axis c. y = -1 d. x - axis
*Wednesday, January 21, 2015 at 10:17pm*

**math**

Olga knows that, if she leaves a tray of ice cubes on the counter all night,they are going to melt.Which of the following best describes the probability that the ice cubes will melt if they are left on Olga's kitchen counter all night? 0,0.1,1 or 100....is the answer 0.1?
*Wednesday, January 21, 2015 at 10:14pm*

**math**

I need help on this question. Can someone help me get through with these question The area of canada is approximately 1x10(Exponent)7, and the area of Mexico is approximately 2x10 (exponent)6 square kilometers. The area of Canada is approximately how many times the area of ...
*Wednesday, January 21, 2015 at 10:03pm*

**Math-please help**

One concert ticket is $5 and the other is $9. There are 500 seats. My expenses are estimated at $4000. Determine equations for income, profit, and expenses if all 500 seats are filled. Are my equations- expenses:y=400 income:4x+2500 profit:y=4x-1500
*Wednesday, January 21, 2015 at 9:58pm*

**math **

Justin has a deck of cards with letters on them. The table below shows the results of justin randomly drawing a card,putting it back,shuffling the deck,and randomly drawing another card many times. Letter of card/frequency A/15 E/19 I/13 O/8 U/6
*Wednesday, January 21, 2015 at 9:57pm*

**math**

The lists below show the players who will be competing in two different games.Both games are pure chance;it is equally probable for any player to with either game. Game 1:Jen,Fred,Monique,Darryn Game 2:Craig,Sarah,Yvonne,Allan What is the probability that Craig will win both ...
*Wednesday, January 21, 2015 at 9:34pm*

**Math please help**

Harry ran for 5 miles. He started at 10:30 and finished at 11:20. What was Harry's average speed in miles per hour? I got the answer: 6.25mph But the answer i have to choose from are: 3 4 5 6
*Wednesday, January 21, 2015 at 9:32pm*

**Math **

Explain how to solve the following system of equations. What is the solution to the system? 2x+2y+z=-5 3x+4y+2z=0 x+3y+2z=1
*Wednesday, January 21, 2015 at 9:31pm*

**Math**

One concert ticket is $5 and the other is $9. There are 500 seats. My expenses are estimated at $4000. Determine equations for income, profit, and expenses if all 500 seats are filled.
*Wednesday, January 21, 2015 at 9:29pm*

**Math**

Addison is making caramel apples. She has 2 1/2 bags of apples. One full bag has 8 apples, and each apple weighs 5 ounces. Write an expression that could be used to find the total number of ounces of apples Addison has. Then find the total number of ounces.
*Wednesday, January 21, 2015 at 9:20pm*

**Math**

6% of what number is 10 1/2? Who would you solve this question?
*Wednesday, January 21, 2015 at 9:18pm*

**Math**

A circle has the circumference 28.26cm. What is the area of the circle? use PI as 3.14. i am confused in how to even solve with the circumference to get the area. Please help
*Wednesday, January 21, 2015 at 9:15pm*

**math**

A grocery store is having a promotion for a new brand of milk.Every gallon has a 20% chance of having a coupon for a free box of breakfast cereal under the cap. If Valeria buys 3 gallons of milk,what is the probability that exactly one of them will win her a free box of cereal?
*Wednesday, January 21, 2015 at 9:13pm*

**math**

The ratio of Jane's number of soda to Pat's number of soda is 2 to 3. If Jane has 16 cans of soda, how many cans of soda does Pat have?
*Wednesday, January 21, 2015 at 9:02pm*

**math**

triangle QRS ~ triangle EFG. Find the measures of the missing sides. QR = ? EF = 10 QS = 24 EG = 5 RS = 45 FG = ? Im having trouble setting up the equations. Please help!!
*Wednesday, January 21, 2015 at 8:56pm*

**Math**

Q. Hectors extended family was gathering a reunion. There were 8 sets of aunts and uncles. There were twice as many cousins as uncles. There were two grand parents,and than there was Hector's family of five. How many people were at the reunion? - A. Do I just add them all ...
*Wednesday, January 21, 2015 at 8:49pm*

**Math**

Sarah was trying to figure out her grades for her math course. she only knew the grade of 4 of the tests she had taken, However the class had taken 5 tests total. She scored a 94, 67, 83, and 93. If Sarah ended up with a grade of 90, what did she get on the 5th and final test...
*Wednesday, January 21, 2015 at 8:45pm*

**Math**

Kelly was helping a friend with cleaning her bedroom. Kelly spent two hours and cleaned 80% of the room. what fraction of the room did Kelly help clean? How would I solve this - divide?
*Wednesday, January 21, 2015 at 8:41pm*

**math**

I have one cookie left at my party!! and 3 of my friends want the last cookie. who schould i give it too? BREANNA, KIRA, or JACK? THIS IS A TRUE STORY RIGHT NOW!! WHO SCHOULD I GIVE THE LAST COOKIE TOO?!?
*Wednesday, January 21, 2015 at 8:36pm*

**Math please help**

Amy jogs 1/3 of a mile in 1/15 of an hour, while John takes 1/30 of an hour to jog 1/5 of a mile. If they continued at this rate who would jog farther in one hour and by how much?
*Wednesday, January 21, 2015 at 8:35pm*

**6th Grade Math**

My son has to solve equations with mixed numbers in them. we are in dispute about the problem below: 6 3/8 = t - 4 3/4 - 2 1/16 I solved it by adding 2 1/16 to both sides, then adding 4 3/4 to both sides. My answer was 13. My son solved it by subtracting he mixed numbers on ...
*Wednesday, January 21, 2015 at 8:34pm*

**math**

what is the temperature of the week the ,if the temperature of monday is 33 tuesday is 32 wednesday is 32 thursday is 34 friday is 31 saturday is 30 sunday is 31 , what is the temperature of a week
*Wednesday, January 21, 2015 at 8:32pm*

**Math**

Stephen was taking photographs of 71 different locations. At each location Stephen too 24 different pictures. How many pictures did Stephen take total? Is this answer correct 71 X 24 = 1704?
*Wednesday, January 21, 2015 at 8:32pm*

**Math**

If I have 87% in a course. What's my mark after my exam worth 15% in which I got 85%?
*Wednesday, January 21, 2015 at 8:31pm*

**Math**

Four of the angles of a pentagon measure 85 degrees, 110 degrees, 135 degrees, and 95 degrees. Find the measure of the missing angle. A. 115 degrees B. 95 degrees C. 135 degrees D. 85 degrees Is the answer D?
*Wednesday, January 21, 2015 at 8:31pm*

**Math**

Find the sum of the interior angles of a nonagon. A. 140 degrees B. 1,620 degrees C. 1,260 degrees D. 1,450 degrees Is the answer C?
*Wednesday, January 21, 2015 at 8:26pm*

**Math **

Maya has 5 sheets of paper. She cuts each sheet into 3 equal sized rectangles. The rectangles are shared equally among 6 students. How many rectangles does each student get?
*Wednesday, January 21, 2015 at 8:16pm*

**math**

Solve: Check your solution. 3y - 7 = -3y + - 19
*Wednesday, January 21, 2015 at 8:10pm*

**Math**

Ms.Groves has trays of paint for students in our class each tray has five colors one of the colors of purple what fraction of the colors in 20 trays of purple
*Wednesday, January 21, 2015 at 8:05pm*

**Math**

If -f(x), or reflection across the x-axis, is done on .7x - 4, then is the new equation -.7x + 4?
*Wednesday, January 21, 2015 at 7:55pm*

**math**

Johnny is jogging along a track. He has already jogged 1 2/3 miles. He plans to jog a total of 3 1/4 miles. How many miles does he have left to jog?
*Wednesday, January 21, 2015 at 7:55pm*

**Math**

Thomas was making iced tea with his mother. the recipe called for 1/2 a cup of sugar. However, Thomas and his mother wanted to cut the recipe in half. How much sugar should they add into the recipe? Would the answer be 1/4.
*Wednesday, January 21, 2015 at 7:45pm*

**Math**

Kara Maria poured herself a glass of 16 ounces of water. She drank 1/2 of her water in the morning. At lunch time she took the remaining water and drank 1/2 of that. How much water did she have left/ Would my answer be 1/4.
*Wednesday, January 21, 2015 at 7:42pm*

**Math proportions**

If the wait time in line to ride a roller coaster is 20 minutes for 150 people how long is the wait time for 240 people? 240-150 = 90 people 150 people = 20 minutes 90 people= 40 minutes?
*Wednesday, January 21, 2015 at 7:41pm*

**Math**

Frank teacher was teaching the class about fractions. She posted the fractions 1/7 and 3/9 on the board. Frank was supposed to answer what the least common multiple of the two fractions was. What did he answer? Help
*Wednesday, January 21, 2015 at 7:34pm*

**math**

The perimeter of a rectangle is 39centimeters. The perimeter of a circle is 39 inches. Which statment is correct about the two shapes is correct? The rectangle/The circle/ or both
*Wednesday, January 21, 2015 at 7:30pm*

**Math**

How could you use an area model to identify the binomial factors of a trinomial?
*Wednesday, January 21, 2015 at 7:29pm*

**Math **

The height was 30, the width was 25,and the length is 20. What is the volume, in cubic inches, of the block of ice? I think you multiply 30x25x20 and get 15,000. The answer is 15,000 cubic inches. Harry wants to make another block of ice with the same volume. He needs one ...
*Wednesday, January 21, 2015 at 7:28pm*

**Math**

There are two fractions that are given. The two fractions are 3/12 and 7/12.what answer so you come up with if you were to add these two fractions together? Would my answer be 10/12.
*Wednesday, January 21, 2015 at 7:23pm*

**grade 6 math**

13 more than product of m and 5
*Wednesday, January 21, 2015 at 7:16pm*

**Math**

Delia has 493 stamps in her stamp collection. She can put 16 stamps on each page of an album. How many pages can she fill completely?
*Wednesday, January 21, 2015 at 7:12pm*

**Math**

Write an inequality for the following. A swimmer dove off a 25 ft. Platform. He submerged 14 feet below the water.
*Wednesday, January 21, 2015 at 6:53pm*

**Math**

I am asked to graph f(x) = (x+3)^2 + 7 and then f(x) + 2. Is this the same as graphing f(x) = (x+3)^2 + 7 and f(x) = (x+3)^2 + 9?
*Wednesday, January 21, 2015 at 6:30pm*

**math**

repost find unknown number in the equation 9/10 - x = 1/5
*Wednesday, January 21, 2015 at 6:29pm*

**7th grade math**

Can you check these simple interest problems? 1. If you borrow $421 for nine years at an interest rate of 4%, how much interest will you pay? Ans: I = prt I = $421*.04*9 I = $151.56 2. If the balance at the end of 8 years on an investment of $630 that has been invested at a ...
*Wednesday, January 21, 2015 at 6:22pm*

**math**

find unknown number in the following equation 9/10 - x +1/5 what is x
*Wednesday, January 21, 2015 at 6:19pm*

**math**

the wheel of a bicycle has a diameterof 72 cm and are rotating with an angular velocity of 12 rad/s. determine how much time the bicycle takes to travel 100m.
*Wednesday, January 21, 2015 at 6:18pm*

**Math**

The container is coated with 2 layers of specialty paint that costs $6.05 per jar. Each jar of paint covers 800cm^2. How much does the paint cost?
*Wednesday, January 21, 2015 at 6:12pm*

**Math**

An ice cream stand has nine different flavors. A group of children come to the stand and each buys a double scoop cone with two flavors of ice cream.If none of the children choose the same combination of flavors ,but all possible combinations of flavors are used, how many ...
*Wednesday, January 21, 2015 at 6:06pm*

**Math**

Every year in Delaware there is a contest where people create cannons and catapults designed to launch pumpkins as far in the air as possible. the equation y=15+110x-16x^2 can be used to represent the height, y, of a launched pumpkin, where x is the time in seconds that the ...
*Wednesday, January 21, 2015 at 5:59pm*

**math**

Please help! The area of a parallelogram is ( x^2 + x - 12) and the length of its base is ( x +4). what is the height of the parallelogram?
*Wednesday, January 21, 2015 at 5:52pm*

**Math (factors and products)**

what are the factors of p^2 + 11p - 42 ? Thank You.
*Wednesday, January 21, 2015 at 5:49pm*

** Math**

Raymond puts the money he inherited in an investment that earns 4.4% per year, compound semi-annually. After 12 years his investment had grown to $35,402.06. Raymond then invested the $35,403.06 at 5% per year, compound quarterly for the next 5 years.
*Wednesday, January 21, 2015 at 5:46pm*

**Math**

What is an equation of the line, in point-slope form, that passes through the given point and has the given slope? a. y-9=4/9(x+3) b. y-9+4/9(x-3) c. y+3=4/9(x-9) d. y-3=4/9(x-9)
*Wednesday, January 21, 2015 at 5:46pm*

**Math**

If there is 5 meters per second how much many is in a meter?
*Wednesday, January 21, 2015 at 5:35pm*

**12 Math**

f(x)=2x^4+5x^3-x^2-3x+1 a)Determine the average slope between the points where x=1 and x=3. b)Determine the instantaneous slope at each of these points.
*Wednesday, January 21, 2015 at 5:19pm*

**Math**

Amy jogs 1/3 of a mile in 1/15 of an hour, while John takes 1/30 of an hour to jog 1/5 of a mile. If they continued at this rate who would jog farther in one hour and by how much?
*Wednesday, January 21, 2015 at 5:13pm*

**Math**

Harry ran for 5 miles. He started at 10:30 and finished at 11:20. What was Harry's average speed in miles per hour?
*Wednesday, January 21, 2015 at 5:12pm*

**math**

Lisa works 7 hours a day, 7 days a week. How many hours does Lisa work in 6 weeks?
*Wednesday, January 21, 2015 at 5:05pm*

**Math**

Q. Hectors extended family was gathering a reunion. There were 8 sets of aunts and uncles. There were twice as many cousins as uncles. There were two grand parents,and than there was Hector's family of five. How many people were at the reunion? - A. Do I just add them all ...
*Wednesday, January 21, 2015 at 5:01pm*

**math**

Camp Oaks gets 32 boxes of orange juice and 56 boxes o apple juice.Each shelf in the cupboard can hold 8 boxes of juice. What is the least number o shelves needed for all the juice boxes?
*Wednesday, January 21, 2015 at 4:54pm*

**Math**

Evaluate 52-2(14-4)-4 Is this the correct answer 506?
*Wednesday, January 21, 2015 at 4:41pm*

**math**

There are 6 muffins in a package.How many packages will be needed to feed 48 people if each person has 2 muffins? A.4 B.8 C.16 D.24
*Wednesday, January 21, 2015 at 4:31pm*

**Math (Greatest common factor) **

Please Help! I dont understand the question asking. The greatest common factor of 12m^5n^3 + 18m^3n^3 - 24m^2n^3 is Am^bn^c, where A,B and C are whole numbers?
*Wednesday, January 21, 2015 at 4:29pm*

**Math**

Invisible braces cost $500 more than metal braces. Metal braces cost $4,800. How muchdo invisibles braces cost?
*Wednesday, January 21, 2015 at 4:28pm*

**Math**

Complete the following statements. Round to the nearest hundreds if necessary. 1.) 6.4in. Is about _ centimeters. 2.) 4qts is about _ L 3.) 10kg is about _ lbs Thanks.
*Wednesday, January 21, 2015 at 4:22pm*

**MATH (factors and product)**

The hypotenuse of a right triangle is 27.5cm. If one leg is 22cm then the other leg is?
*Wednesday, January 21, 2015 at 4:20pm*

**Math**

Evaluate this 52-2(14-4)-4 Is this correct 506?
*Wednesday, January 21, 2015 at 4:16pm*

**math**

I would like some help simplifying and adding this fraction problem please help me I am so confused 7 2/3 + 8 5/6
*Wednesday, January 21, 2015 at 3:54pm*

**math**

five kids and three adults are going to the circus. kids tickets are on sale for half the price of adult tickets. the total cost is $60. how much is one kids ticket? how much is one adult ticket?
*Wednesday, January 21, 2015 at 3:53pm*

**Math**

When I write the inverse function for y = 3x - 7, can I change y to f^-1(x)?
*Wednesday, January 21, 2015 at 3:38pm*

**math**

Describe the vertical asymptote(s) and hole(s) for the graph of .y=(x-3)(x-1)/(x-1)(x-5) A. asymptote: x = 5 and hole: x = 1 B. asymptote: x = –5 and hole: x = –1 C. asymptote: x = –3 and hole: x = 5 D. asymptote: x = 5 and hole: x = –1
*Wednesday, January 21, 2015 at 3:23pm*

**math**

Designer Dolls, Inc. found that the number N of dolls sold varies directly with their advertising budget A and inversely with the price P of each doll. The company sold 5200 dolls when $26,000 was spent on advertising and the price of a doll was set at $30. Determine the ...
*Wednesday, January 21, 2015 at 3:07pm*

**math**

(1 pt) At the surface of the ocean, the water pressure is the same as the air pressure above the water, about 15lb/in2, Below the surface the water pressure increases by about 4.24lb/in2 for every 10 ft of descent. Write a function f(x) which expresses the water pressure in ...
*Wednesday, January 21, 2015 at 2:32pm*

**Math**

How to find the inverse of y = log(4)x^2
*Wednesday, January 21, 2015 at 2:20pm*

**math**

The distance from City Y to City Z is 2.25 inches on the map. The actual distance is 45 miles. The distance from City X to City Y is 1.75 inches on the map. What is the actual distance, in miles, from City X to City Y?
*Wednesday, January 21, 2015 at 2:19pm*

**math**

i think you have to find it by quadractic way or b- {b2-4ac] divided by 2 times a. i get what you mean but the answer is not right. h(t)=-4.9t2 +16.9t+0.5
*Wednesday, January 21, 2015 at 2:05pm*

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