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October 31, 2014

October 31, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**math help**

Given f(x) = x 10. What is f(7) i think its -10
*Wednesday, October 8, 2014 at 10:36am*

**math**

The perimeter of a rectangle is 90 cm. Its width is half its length. Which equation could be solved to find the dimensions of the rectangle?
*Wednesday, October 8, 2014 at 10:18am*

**math**

25 – 5x = 80
*Wednesday, October 8, 2014 at 10:18am*

**math (need check answer)**

You are buying balloons for a party. A small balloon cost $3. A large balloon cost $4. Write an algebraic expression for the cost of x small balloons and y large balloons. Then find the total cost for 14 small balloons and 8 large balloons. Q1: An algebraic expression for the ...
*Wednesday, October 8, 2014 at 9:43am*

**Math**

What can you multiply an expression by to eliminate the imaginary part of the denominator? 1.) (2+4i)/3i= 2.) (1-2i)/2i=
*Wednesday, October 8, 2014 at 9:30am*

**math **

In how many ways can four aces be drawn from a deck of cards? (Order is not important.)
*Wednesday, October 8, 2014 at 2:39am*

**math **

In how many ways can a full house of three jacks and a pair of twos be obtained from an ordinary deck of cards?
*Wednesday, October 8, 2014 at 2:38am*

**Math**

1. Find the common ratio and 9th term of the sequence 6, -3, 3/2, -3/4, ..... 2. Find the 7th term of the sequence: 2, 6, 18, 54, ..... 3. Find the 11th term of the sequence 1, -1/2, 1/4, -1/8, .....
*Wednesday, October 8, 2014 at 2:17am*

**Math**

What is the answer to the equation 85.3 - 23.58 = ?
*Wednesday, October 8, 2014 at 12:56am*

**math**

if A 52 card deck of playing cards is shuffled, and one card is dealt from the top of the deck. What is the probability that it is a red ten? 52 cards in a standard deck. 13 Diamonds 13 Hearts all RED. Then have 13 Spades and 13 Clubs, all BLACK so 26 red cards total and 26 ...
*Wednesday, October 8, 2014 at 12:39am*

**math**

if a house is worth 85,000 what is is value in a year at 5%
*Wednesday, October 8, 2014 at 12:02am*

**math**

math estamate 56,225 divided by 48
*Tuesday, October 7, 2014 at 11:50pm*

**Math**

1. Find the 11th term of the geometric sequence 64, -32, 16, -8, … . 2. Find the 1st term of a geometric sequence with a 10th term -1024 and r = -2. 3. Find the sum of each infinite geometric series, if possible. a. 10 + 2 + 2/5 + ..... b. 1.2 – 2.4 + 4.8 – 9.6...
*Tuesday, October 7, 2014 at 11:21pm*

**Math**

1. A teacher teaches 8 students how to fold an origami model. Each of these students goes on to teach 8 students of their own how to fold the same model. If this teaching process goes on for 6 generations, how many people total will know how to fold the origami model? 2. By ...
*Tuesday, October 7, 2014 at 10:35pm*

**Math**

An airplane flys at a constant altitude of 2 miles and a constant speed of 600 miles per hour on a straight course that will take it directly over a kangaroo on the ground. How fast is the angle of elevation of the kangaroo's line of sight increasing when the distance from...
*Tuesday, October 7, 2014 at 10:33pm*

**algebra 2**

Graph the system of constraints and find the value of x and y that maximize the objective function. Constraints {x >= 0 y >= 0 y <= 3 y <= -x+5} Objective Function C=-5x+3y a) 0,0 b) 2,3 c) 5,0 d) 0,3 I am a mom going crazy. I did horrible in math in school. ...
*Tuesday, October 7, 2014 at 10:07pm*

**7th grade math**

Not really sure what to do for this problem. this was how it was worded on worksheet. Larue scored 10 points less than 3 times the number of points that Ross scored. Larue scored 11 points. How many points did Ross score?
*Tuesday, October 7, 2014 at 9:52pm*

**Math **

What is the sum of decimals? 0.28 + 0.62 = Write to explain how you found your answer.
*Tuesday, October 7, 2014 at 9:51pm*

**Math**

1.) If a = 2 and the vertex of a parabola is (3, -4), will there be a minimum or maximum value for the parabola? What is the value? 2.) If a = 2 and the vertex of a parabola is (3, -4), what is its axis of symmetry?
*Tuesday, October 7, 2014 at 9:45pm*

**math**

A solution contains 100 mg/mL of a drug, and the recommended dose is 50 mg/lb once a day. How much solution would be needed for one dose to be administered to a 20kg patient?'
*Tuesday, October 7, 2014 at 9:42pm*

**Math**

Carter got the following scores on Science tests: 78,82,88,90,93. What is the mean deviation?
*Tuesday, October 7, 2014 at 9:35pm*

**Math**

1. Find the value of k so that 2, k^2, 8 form a geometric sequence. 2. Water is leaking from a water tower. On the first day, two gallons were lost. The leak is getting progressively worse and the amount of water lost triples each day. How many gallons would be lost on the 8th...
*Tuesday, October 7, 2014 at 9:33pm*

**Math**

1. Find the common ratio and the 7th term of the sequence 2/9, 2/3, 2, 6, 18, ..... 2. The 3rd and 5th terms of a geometric sequence are 2 and 1/2 respectively. What is the first term? 3. Find the geometric mean between: a. 1/2 and 1/3 b. sqrt5 - sqrt2
*Tuesday, October 7, 2014 at 9:31pm*

**Math**

A bag contains 8 green marbles and 4 blue marbles. If two marbles are drawn in succession without replacing them in the bag, what is the probability of drawing a green marble on the second draw?
*Tuesday, October 7, 2014 at 9:28pm*

**math**

If a student scored an average of 60% on a test, what score would he/she need to average it out to a passing 80+. What formula would you use. This isn't a question on a test, it's one I've been trying to find. I am able to retake a test multiple times and will ...
*Tuesday, October 7, 2014 at 9:24pm*

**Math**

The ages in years of the houses on Kelly's block are: 20,26,11,2,28,18,2,27. Find the mean, median and the mode. Mean: 16.6 Median: 18.20 Mode: 2 Which measures should I use to represent the ages of the houses? Explain.
*Tuesday, October 7, 2014 at 9:00pm*

**MATH **

A boat on a river travels 16 miles downstream in only 2 hours. It takes the same boat 7 hours to travel 28 miles upstream. What are the speed of the boat and the speed of the current?
*Tuesday, October 7, 2014 at 8:52pm*

**Math**

in a rectangle the measures of the base and the altitude are in a ratio of 1:4. I f the rectangle is equal in area to a square with a perimeter of 60 feet, find the dimensions of the rectangle HELP PLEASE TYSM!!
*Tuesday, October 7, 2014 at 8:44pm*

**7th grade math**

Can you check my answers please. 1. Joe and his friends at 3/8 of pie. If the pie was cut into 8 pieces, how many pieces are left? Ans: 8/8 - 3/8 = 5/8 pieces left 2. Michaela walked 2/5 miles to the store in 1/4 hour. What's her walking pace? Ans: (2/5)/(1/4) = (2/5)*(4/1...
*Tuesday, October 7, 2014 at 8:36pm*

**7th grade math word problems**

While scuba diving Quentin descended 2 1/3 feet each second for 30 seconds. If Quentin ended up at a depth of -234 feet before he began his descent, what was his original depth? Do I multiply 2 1/3ft by 30 seconds?
*Tuesday, October 7, 2014 at 8:24pm*

**Math radical equations**

Please show me how to do these step by step because I have a test tomorow and I need to understand how to do these questions : 1. M-1 under the square root sign +5= m-2 2. 3n+10 under the square root = n+4 3. K-9 under the square root - (k under square root )=-1 4. 2h-5 under ...
*Tuesday, October 7, 2014 at 8:17pm*

**Math! Please check!**

Consider the statement: If two whole numbers are even, then their sum is odd. What assumption should be made to prove the statement indirectly? A- The numbers are equal. B- The numbers are not equal. C- Their sum is not odd. D- Their difference is even. My choice is C.
*Tuesday, October 7, 2014 at 7:51pm*

**Math **

Luke walks 1 3/4 miles each way to school. Tuesday before he realized he left his lunch at home and had to go back to get his lunch. How many miles did luke walk on wednesday to and from school? A: 3 1/2 B: 4 C: 4 1/2 D: 2 3/4 I dont understand tis one. what do i do to solve ...
*Tuesday, October 7, 2014 at 7:50pm*

**Math! Please check!**

What is the hypothesis of the conditional statement? If you are not there, then I will leave. A-you are there B- you are not there C- I will leave D- I will not leave My choice is B. What is the converse of the conditional statement? If it is Tuesday, then I walk to the park. ...
*Tuesday, October 7, 2014 at 7:46pm*

**Math**

What is amount of money on $40,500 with 6.2 interest rate for a year
*Tuesday, October 7, 2014 at 7:39pm*

**Math**

For the most recent year available, the mean annual cost to attend a private university in the United States was $20,082. Assume the distribution of annual costs follows the normal probability distribution and the standard deviation is $4,500. Ninety-five percent of all ...
*Tuesday, October 7, 2014 at 7:38pm*

**math**

A jar contains 120 pennies. A bigger jar contains 1 1/4 times ss many pennies. What is the value of the pennies in the jar?
*Tuesday, October 7, 2014 at 7:33pm*

**math(fractions) **

6/5 times 15/4 =90/20 but i cant figure out what the answer is on my answer sheet i have to simplfly. please help thanks you ms.sue and brady .
*Tuesday, October 7, 2014 at 7:33pm*

**Math! Please check!**

Which statement best describes inductive reasoning? A- It uses previously proven or accepted properties to reach a conclusion. B- It uses observation of patterns and past events to reach a conclusion. C- It uses any convenient method to reach a conclusion. My choice is B. ...
*Tuesday, October 7, 2014 at 7:16pm*

**math**

Carla Compra borrowed $800 at 14% for one year. She paid a $15 processing fee. The interest paid will be $. Thus, the total finance charge (the interest plus the processing fee) will be $ Therefore, to the nearest tenth, the APR = total finance charge ÷ amount borrowed...
*Tuesday, October 7, 2014 at 7:15pm*

**math**

grace made 6 out of 10 shots at the basket ball game. what percentage of shots did she make?
*Tuesday, October 7, 2014 at 7:02pm*

**math **

Evaluate: -3/4 - 1 3/8 A: - 17/8 B: -1 C: 17/8 D: -5/8 I put C but its was incorrect. I'm to sure what the correct answer would then be. can you show me how to solve it and how to achieve the correct answer?
*Tuesday, October 7, 2014 at 6:56pm*

**Math**

a truck can be rented from company a for 100 a day plus 0.60 per mile and company b charges 50 a day plus 0.80 per mile to rent the same truck. find the number of miles in a day at which the rental costs for company a and b are the same. Please answer in miles
*Tuesday, October 7, 2014 at 6:52pm*

**math help**

What are the domain and range of the relation {(4, 2), (0, 1), (0, 5), (8, 10)}?
*Tuesday, October 7, 2014 at 6:49pm*

**Math**

Having a lot of trouble with this one: Q) Tidal volume is the volume of air displaced in the lungs between inhalation and exhalation (the amount of air in a breath). The residual volume is given by the remaining in the lungs even after the deepest exhalation (ie the minimum ...
*Tuesday, October 7, 2014 at 6:48pm*

**math(fractions) **

what is 9/10 times 25/6.i got 225/60 but its not on my answer sheet.i need to simplify. It's not on my answer sheet. please help. its a puzzle.
*Tuesday, October 7, 2014 at 6:47pm*

**Math**

A submarine begins at -125 below sea level. If the submarine travels at 20 feet per minute, how many minutes would it will take the submarine to rise to the surface and then defend to -104 feet? A: 6 1/4 B: 11 2/9 C: 5 1/5 D: 11 9/20 I said C but it was wrong. how do i solve ...
*Tuesday, October 7, 2014 at 6:43pm*

**Math**

At noon, a hot air balloon was at an elevation of 2,400 feet. One hour later it was at an elevation of 1,400 feet. A: write an expression you can use to find the altitude from noon to one. B: solve the expression. i am not sure what to do on this.
*Tuesday, October 7, 2014 at 6:31pm*

**math/physics**

A 0.600-kg ball traveling 4.00 m/s to the right collides with a 1.00-kg ball traveling 5.00 m/s to the left. After the collision, the lighter ball is traveling 7.25 m/s to the left. What is the velocity of the heavier ball after the collision?
*Tuesday, October 7, 2014 at 6:25pm*

**MATH**

THE AMOUNT OF CLOTH USED TO MAKE FOUR CURTAINS IS GIVEN BY THE FUNCTION A=-4X^2 + 40X WHERE X IS THE WIDTH OF ONE CURTAIN IN FEET AND a IS THE TOTAL AREA IN SQUARE FEET. FIND THE WIDTH THAT MAXIMIZES THE AREA OF THE CURTAINS. WHAT IS THE MAXIMUM AREA?
*Tuesday, October 7, 2014 at 6:06pm*

**math**

writing to explain write a story problem using ten $100 bills,nine$10 bills,and twenty $1 bills.
*Tuesday, October 7, 2014 at 5:42pm*

**Math**

A piece of wood is 8 and 7/8 in. long is cut a piece 45 1/2 in. long. If 1/16 is wasted for the cut, how much wood is left.
*Tuesday, October 7, 2014 at 5:38pm*

**math**

a fish tank that holds 80 gallons of water is 55 percent full how many gallons are in the tank now and how many more gallons are needed to fill the tank
*Tuesday, October 7, 2014 at 5:34pm*

**Math**

How to find the slope of a STRAIGHT Line
*Tuesday, October 7, 2014 at 5:32pm*

**Math**

How do you find the slope of a line? And how can you tell which point is x or which one is y
*Tuesday, October 7, 2014 at 5:30pm*

**math**

A band played 3 concerts and earned a total of $321.00. The band earned about the same amount for each concert. Estimate how muchthe band earned each night.
*Tuesday, October 7, 2014 at 5:28pm*

**math**

When Kaitlin divided a fraction by 1/2,the result was a mixed number.Was the original fraction less than or greater than 1/2? Explain your reasoning
*Tuesday, October 7, 2014 at 5:10pm*

**Math **

leslie is in charge of packing snacks for her class. she has 30 cookies and 20 apples. she wants to put the same number of cookies and the same number of apples in each pack. what are the possible numbers of packs she can make? how many items are in each bag?
*Tuesday, October 7, 2014 at 5:02pm*

**Math**

A projectile is shot upward from the earth with an initial velocity of 320 ft/sec. (a) What is the velocity after 5 secs.? ft/sec. (b) What is the acceleration after 3 secs.? ft/sec^2.
*Tuesday, October 7, 2014 at 5:02pm*

**Math**

For this problem, a person standing on the edge of a cliff throws a rock directly upward. it is observed that 2 secs later the rock is at its maximum height (in feet) and that 5 secs after that (meaning 7 seconds after being thrown) the rock hits the ground at the base of the ...
*Tuesday, October 7, 2014 at 5:00pm*

**Math**

If a ball is thrown vertically upward from the roof of 48 foot building with a velocity of 80 ft/sec, its height after t seconds is s(t) = 48+80t-16t^2 What is the velocity of the ball when it hits the ground?
*Tuesday, October 7, 2014 at 4:50pm*

**Math**

Is 0.600 kg lighter than 1.00kg?
*Tuesday, October 7, 2014 at 4:29pm*

**Math**

How does estimating help you add two digit numbers
*Tuesday, October 7, 2014 at 4:19pm*

**math**

John tosses a penny 10 times and finds that 2 of those times the penny comes up heads and 8 of those times the penny comes up tail. What should John conclude? a.That the expected relative frequency probability of getting heads when tossing a penny is 2/10. b. That it is more ...
*Tuesday, October 7, 2014 at 4:10pm*

**Math**

Does 1.645 round to 1.65?
*Tuesday, October 7, 2014 at 4:05pm*

**Math**

The New York State Lottery advertises that for its instant lottery games there is a 4 in 21 chance of winning. If you buy only 1 instant lottery card, what is the chance you will win? I think the answer is 4/21 but am not sure.
*Tuesday, October 7, 2014 at 4:04pm*

**math**

a 20 metre length of cloth is cut into two pieces in the ratio 1:9. how long is each piece?
*Tuesday, October 7, 2014 at 3:15pm*

**MATH**

Solve the following equations for x where 0 ≤ x < 2π. tan(x)sin(2x) = √3 sin (x) and cos(2x)−cos(x) = −sin2(x)+1/4 Stuck on these particular types. Have no idea how to start.
*Tuesday, October 7, 2014 at 3:15pm*

**math**

find the sum of 2 1/2 and 2/5 which of the following makes the statement true? 1/5^0 the area of a certain state is 840,000 square miles. what is this area in scientific notation? which is irrational? A. 0.11711711711... B. o.8596873205... C. 0.812812812812... D. 0....
*Tuesday, October 7, 2014 at 2:37pm*

**math**

A 12-foot tree casts a 22-foot shadow. Find the angle of elevation from the tip of the shadow to the top of the tree. Round the answer to the nearest tenth.
*Tuesday, October 7, 2014 at 2:18pm*

**Math**

What is -3.702 + -9.78?
*Tuesday, October 7, 2014 at 1:58pm*

**Math**

A ball that is hit or thrown horizontally ball that is hit or thrown horizontally with a velocity of v metres per second will travel a distance d metres before hitting the ground, where d=v square root h/ 4.9 and h is the height, in metres, from which the ball is hit or thrown...
*Tuesday, October 7, 2014 at 1:46pm*

**Math**

If I spoke to someone for 60 minutes and then spoke to them again for 41 minutes, would that mean I spoke to them for 1 hour 41 minutes? 60+41=101 minutes?
*Tuesday, October 7, 2014 at 11:58am*

**math**

Jonah wants to buy two copies of a book. Which algebraic expression could Jonah use to find the value of the items?
*Tuesday, October 7, 2014 at 10:43am*

**Math**

Eleanor and Max used two rectangular wooden boards to make a set for the school play. 1 board was 6 ft long, the other was 5 1/2 ft long. The 2 boards had equal widths. The total area of the set was 60 3/8 square ft. What was the width?
*Tuesday, October 7, 2014 at 7:48am*

**math**

234 X 323
*Tuesday, October 7, 2014 at 4:26am*

**Math**

If the area of the ceiling is 129 square feet with one side measuring 10 3/4 how much trim does we need for the ceiling
*Tuesday, October 7, 2014 at 4:04am*

**math**

calculate, to 1 decimal place, the amount of fencing you would need to enclose a square garden that is 42m squared
*Tuesday, October 7, 2014 at 12:29am*

**math**

calculate, to one decimal place, the amount of fencing you would need to enclose a square garden of 6m squared
*Tuesday, October 7, 2014 at 12:28am*

**math**

there are 6 rows with 18 chairs in each row. in the center of the chairs, 4 rows of 6 chairs are brown. the rest of the chairs are blue. how many chairs are blue?
*Monday, October 6, 2014 at 11:13pm*

**Math Question **

f(x)=-5√-4x+4+2. Find the inverse of this function.
*Monday, October 6, 2014 at 10:25pm*

**math**

eva wants to make two pieces of pottery. She needs 3/5 pound of clay for one piece and 7/10 pound of clay for the other piece. She has three bags of clay that weigh 4/5 pound a piece. How many bags of clay will eva need? How many pounds of clay will she have left over?
*Monday, October 6, 2014 at 10:25pm*

**Math**

You have a 5/16 in. drill bit. Will it drill a hole large enough to fit a 5 mm bolt? Show two different ways to answer this question. Explain your thinking. I couldn't even figure out the first way. Please help!
*Monday, October 6, 2014 at 10:24pm*

**Math**

The height of a pop can is 15 cm and its shadow is 20 cm long. A carton of milk next to the can is 0.25 m tall. Determine the length of the carton's shadow, to one tenth of a centimeter. I did 100cm*0.25... but the answer is 33.3cm How did they get that?
*Monday, October 6, 2014 at 9:32pm*

**Math**

When Synthetically dividing to find a real root out of all Possible Roots, what must the remainder be in order to prove that the PR is an actual root? A.1 B. 0 C.-1 D.Sq root of 1 E. i My answer is B. 0. Am I correct?
*Monday, October 6, 2014 at 9:31pm*

**Math**

If a flew flew an estimated distance of 800 kilometers what is the greatest distance the plan could have flown
*Monday, October 6, 2014 at 9:02pm*

**Math**

A family size pizza is 24$ and costs 3 times as much as a small pizza. How much does the small pizza cost?
*Monday, October 6, 2014 at 8:52pm*

**Math**

Forty members of a group are making candles. One member drops out and the rest have to make three more candles each to make up. Each member makes the same number of candles. How many candles do they make altogether.
*Monday, October 6, 2014 at 8:49pm*

**math**

an office manager is renting a local hall for un upcoming event. The hall costs $200. The food costs $14 per person. The office manager is not sure how many people will attend. Which quantity is not a variable quantity - the cost to rent the hall, the number of people who will...
*Monday, October 6, 2014 at 8:40pm*

**Math**

Marla and her mom cooked 21.3 liters of spaghetti sauce. They used 18 jars of the same size to can it. About how much did each jar hold?
*Monday, October 6, 2014 at 8:31pm*

**MATH**

We now have d dx [x5 + y8] = 5x4 + 8y7y' = d dx [9] = 0. Rearranging this, we get 8y7y' = ?????????? ------------------------------------- A table of values for f, g, f ', and g' is given. x f(x) g(x) f '(x) g'(x) 1 3 2 4 6 2 1 8 5 7 3 7 2 7 9 (a) If h(...
*Monday, October 6, 2014 at 8:18pm*

**math.**

Sally had saved 5 quarters from washing cars. How many cents does Sally have? // Sam has saved one thousand nine hundred cents from selling lemonade. How many dollars does Sam have?
*Monday, October 6, 2014 at 8:16pm*

**math**

Valerie and Bret have a total of 24 dog show ribbons.Bret has twice as many ribbons as Valerie.How many ribbons does each have?
*Monday, October 6, 2014 at 8:07pm*

**Math**

Melanie has 84 muffins, which he needs to box up, 9 of which are blueberry, into dozens. How many boxes does she need?
*Monday, October 6, 2014 at 8:01pm*

**math**

5^5/5^2 A. 5^1 B. 5^2 C. 5^3 D. 5^4 Is the answer B? Thanks a bunch
*Monday, October 6, 2014 at 8:00pm*

**Math**

Tim has forty five books. Jason has forty two times more books than Tim. How many books does Jason have?
*Monday, October 6, 2014 at 7:56pm*

**Math**

I'm trying to solve this without using the gcf. 23/525. X 63/92
*Monday, October 6, 2014 at 7:50pm*

**math 1 question**

A student measures a rectangular room to be 20.0m x 17.16m. Which of the numbers below represents the room's area with the correct number of significant figures? 340m^2 343m^2 343.2m^2 343.20m^2 the correct answer is c but it says sig fig so is it b??? im having trouble ...
*Monday, October 6, 2014 at 7:46pm*

**math**

w^12/w^18 A. w^30*** B. w^-30 C. w^6 D. w^-6 A?
*Monday, October 6, 2014 at 7:44pm*

**math**

what pattern can you use to multiply a number and 9 if you know 10 times the number? give an example.
*Monday, October 6, 2014 at 7:43pm*

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