Monday

October 20, 2014

October 20, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**math**

what is the halfway point between the following numbers 2000 and 4000
*Monday, September 15, 2014 at 3:54pm*

**Math**

It's greater than 700 000 The sum of all it's digits is 14 It has no zeros The hundreds digit is 3
*Monday, September 15, 2014 at 3:49pm*

**Math Proof**

Prove: Let a,b exist in the reals with a<b, (i) For the open interval E=(a,b) prove that the inf E=a and sup E=b (ii) for the closed interval F=[a,b], prove that inf F=a and sup F=b.
*Monday, September 15, 2014 at 3:47pm*

**math**

60x^4-5x^3+x^2-30/10
*Monday, September 15, 2014 at 3:28pm*

**Math**

Find the other endpoint given the first endpoint and the midpoint A = (3, 5) B = (5, -11) find C
*Monday, September 15, 2014 at 3:19pm*

**7th grade math**

Can you check the following? 1. A recipe for muffins needs 1/2 cup of milk. You are making 3/4 of the recipe. How much milk do you need? Ans: (1/2) / (3/4) = (1/2) x (4/3) = 2/3 cups 2. Betty is running on a track that is 2/3 of a mile long. So far she has run 1/2 of the way ...
*Monday, September 15, 2014 at 2:56pm*

**Math**

explain whether the following given are closed under addition: B={0, 1} T={0, 4, 8, 12, 16, ...} F={5, 6, 7, 8, 9, 10,...} {x|x E W and x>100}
*Monday, September 15, 2014 at 2:52pm*

**Math 221**

A distribution center receives shipment of a product from three different factories in the quantities of 60, 30 and 20. Three times a product is selected at random, each time without replacement. Find the probability that (a) all three products came from the second factory and...
*Monday, September 15, 2014 at 1:11pm*

**Math**

If I want to reflect f(x) = -3x + 5 over the x-axis, would the new equation be f(x) = 3x - 5? Or is it -f(-x) = 3x - 5?
*Monday, September 15, 2014 at 12:55pm*

**Math 221 Week3**

A probability experiment consists of rolling a 6 sided die. Find the probability of the event below: rolling a number less than 3? The probability is
*Monday, September 15, 2014 at 12:49pm*

**Math 221 Week3**

A distribution center receives shipment of a product from three different factories in the quantities of 60, 35 and 25. Three times a product is selected at random, each time without replacement. Find the probability that (a) all three products came from the second factory and...
*Monday, September 15, 2014 at 12:36pm*

**8th grade math **

what is 5² / 5⁵ = ? other options are: a) 5¹ b) 5³ c) 5⁴ d) 5² **** Is 5² right?
*Monday, September 15, 2014 at 12:15pm*

**Math**

The observation for three materials shows: Material A absorbs all the visible light (opaque) Material B is transparent to all the visible light (transparent) Material C absorbs blue light but is transparent to red light. (Blue light has wavelength 0.4 m, red light has ...
*Monday, September 15, 2014 at 10:48am*

**Math using quadratic equation**

The freight train runs 12miles per hour than a passenger train. It runs 65miles in the same time that the passenger train runs 165miles find the rate of each train. I dont really know the formula using quadratic im sorry
*Monday, September 15, 2014 at 7:36am*

**Math using Quadratic equation**

The area of a square is 196cm2(squared), find the measure of one side. Thank you,, this is my assign. In math1, im using the formula A=s*s but i need to solve this using quadratic equation.
*Monday, September 15, 2014 at 7:27am*

**math**

Suppose someone gives you 8 to 2 odds that you can not roll two even numbers with the roll of two fair dice. This means you win $8 if you succeed and you lose $2 if you fail. What is the expected value of this game to you? Should you expect to win or lose the expected value in...
*Monday, September 15, 2014 at 3:20am*

**math**

A point,X ,is 25 feet from the center of a circle.If the diameter of the circle is 14 feet,what is the length (in feet)of a tangent from point X to the circle? a. square root 29 b. 18 c. 15 square root 2 d. 24 e. square root 673 please answer and explain
*Sunday, September 14, 2014 at 10:47pm*

**physics, math**

Part A & B are 0.10m apart. A point charge of +3.0*10^-9C is placed at A and a point charge of +1.0*10^-9C is placed at B. X is a point on the straight line through A and B. If a third charge C or charge 1.5*10^-9 is placed at X, where must X be for the resultant force to be ...
*Sunday, September 14, 2014 at 9:43pm*

**Math**

How do you write the transformation of a quadratic function two units right from its parent function? Is it y = (x + 2)^2?
*Sunday, September 14, 2014 at 9:14pm*

**Math**

A Social Security number has seven digits. How many Social Security numbers are possible?
*Sunday, September 14, 2014 at 9:14pm*

**Math**

An exam consists of six true-or-false questions. Assuming that every question is answered, in how many different ways can a student complete the exam? In how many ways may the exam be completed if a penalty is imposed for each incorrect answer, so that a student may leave some...
*Sunday, September 14, 2014 at 9:11pm*

**Math**

What is the definition of a multiple
*Sunday, September 14, 2014 at 9:07pm*

**math**

given the domain of g(x) is (-3,5) and the range of g(x) (-10, 10) find the domain and range of the transformed function 4g(x-7)+12
*Sunday, September 14, 2014 at 8:46pm*

**Math**

Use the quadratic formula to solve the equation for x in terms of y and y in terms of x. (Enter your answers as a comma-separated list. If there is no solution, enter NO SOLUTION.) 2x^2 + 7xy + 1 − y^2 = 0 (a) x in terms of y x = (b) y in terms of x y =
*Sunday, September 14, 2014 at 8:31pm*

**Math**

A box with an open top is to be constructed by cutting a-inch squares from the corners of a rectangular sheet of tin whose length is twice its width. What size sheet will produce a box having a volume of 32 in^3, when a = 2? width in length in
*Sunday, September 14, 2014 at 8:30pm*

**Math**

A pizza box with a square base is to be made from a rectangular sheet of cardboard by cutting six 1-inch squares from the corners and the middle sections and folding up the sides (see the figure). If the area of the base is to be 144 in^2, what size piece of cardboard should ...
*Sunday, September 14, 2014 at 8:28pm*

**Quick math help**

An angle with a measure of 89.9 degrees... Would it be a right or an acute angle?
*Sunday, September 14, 2014 at 7:51pm*

**PLEASE HELP! Math**

I really need help with this one question on my math pretests and I have no idea what to do! The question is: Mandy begins bicycling west at 30 miles per hour at 11:00 am. If Liz leaves from the same point 20 minutes later bicycling west at 36 miles per hour, when will she ...
*Sunday, September 14, 2014 at 7:40pm*

**Math**

12 cards are drawn with replacement from an ordinary deck of 52 cards. What is the probability that 4 queens of hearts, 4 aces of spades, and 4 kings of clubs are drawn?
*Sunday, September 14, 2014 at 7:34pm*

**Math evaluating expressions with rational numbers**

Liquid nitrogen freezes at -346 degrees F and boils -321 F. Janice gradually heats frozen nitrogen 1 1/2 degrees several times over an hour. 1)Define variables for the number of times Janice increases the temperature and the temperature of the liquid nitrogen after the ...
*Sunday, September 14, 2014 at 7:17pm*

**math**

How many gallons of water are needed to raise the level of a swimming pool 75' x 42' four inches above its present level? ( 1 cubic foot= 7 1/2 gallons )
*Sunday, September 14, 2014 at 7:11pm*

**math**

If 4% of motorists on the Turnpike leave at a certain exit and 5% of these go to one particular motel for lodging,out of every 10,000 motorists how many motorists may be expected to go to this motel?
*Sunday, September 14, 2014 at 7:08pm*

**math**

Evaluate x5-13 if x =-2
*Sunday, September 14, 2014 at 6:27pm*

**math**

A company has determined that the profit, in dollars, it can expect from the manufacture and sale of tennis racquets is given by P = −0.01x2 + 130x − 180,000. How many racquets should the company manufacture and sell to earn a profit of $174,900
*Sunday, September 14, 2014 at 5:50pm*

**math**

In order to pass a physical education class at a university, a student must run 1.0 mi in 12.5 min. After running for 10.0 min (assume constant speed), she still has 510 yd to go. What constant acceleration does she need over the final 510 yd in order to make it?
*Sunday, September 14, 2014 at 5:45pm*

**math**

Clark is cooking a 12 pound ham. The ham needs to be cook 20 minutes for each pound. Clark wants to serve the ham at 5 p.m. What is the latest time he should place the ham in the oven.
*Sunday, September 14, 2014 at 5:29pm*

**math**

Riley wants to raise $2550 for a fundraiser walk. He needs to ask people to pledge money for each mile that he walks. How many people will he need to get pledges from in order to reach his goal.
*Sunday, September 14, 2014 at 5:20pm*

**math**

Complete the pattern 82,71,60,?,?
*Sunday, September 14, 2014 at 5:15pm*

**Math **

Ok so I need to write a equation for this jasmine paid $25 for 2 binders and 1 pack of pens. The pens cost $5. What equation could I write to find out the price per binder? Could it be 25-5=x
*Sunday, September 14, 2014 at 5:14pm*

**math**

Complete the pattern 4,13,22,?, ?
*Sunday, September 14, 2014 at 5:03pm*

**MATH**

Brenda donates part of her salary to the local childrens hospital each month by having $15 taken out of her monthly paycheck. Write an integer to represent the amount taken out of each paycheck. Find an integer to represent the change in the amount of money in Brenda's ...
*Sunday, September 14, 2014 at 4:56pm*

**math**

after how many complete rotations will a bicycle wheel with a diameter of 65cm cover a distance of 2km
*Sunday, September 14, 2014 at 4:53pm*

**math**

you are ordering pizza for a party. One pizza serves 8 people. You are expect that there be 35 people. How many pizzas should you order.
*Sunday, September 14, 2014 at 4:48pm*

**math**

The length of a rectangle is five less than three times its width. Find the dimensions of the rectangle if its area is 782. I get 18.84 x(3x-5)=782. The book says 17 m by 46 m
*Sunday, September 14, 2014 at 4:18pm*

**math**

The length of the shadow of a pole on the level ground increases by 60 meter when one angle of elevation of the sun changes 54° to 32°.calaulate the height of the pole,correct to three significants figures.
*Sunday, September 14, 2014 at 4:07pm*

**Math **

A box manufacturer wants to produce an open box for which the volume is 2 cubic meters and the length is twice the width. What actual dimensions of he box will require the least amount of material? Work: V = 2m^3 2m^3 = (w)*(2w)*(h) Possible dimensions: length width height ...
*Sunday, September 14, 2014 at 3:57pm*

**math**

how could you rewrite the expression (3+5)+8 using the Associative property of addition
*Sunday, September 14, 2014 at 3:51pm*

**math**

Amy is building a house. The basement floor is at -15 feet . The roof of the house is above the ground 25 feet . Express the comparison of heights as an inequality . Explain the meaning of the inequality
*Sunday, September 14, 2014 at 3:41pm*

**math**

(12^5)^3 = 12 ( I have to find the exponent) my answer is 15 for the exponent
*Sunday, September 14, 2014 at 2:05pm*

**Math**

Use distributive property and simplify the expression. 4 + 2(3x - 1) + 9 - 6x + 15 - 5x + 14 - 3x + 14 - 6x + 11 *my answer* I wanna make sure my answer is right. 3.82e+7 (there is no multiple choice) my answer is 38200000
*Sunday, September 14, 2014 at 2:01pm*

**Math!**

1) What is the value of 19 + 5a^4 + 3b^2 when a = 2 and b = -4? (this is not a multiple choice question) but my answer is 147. 2)Combine the like terms to simplify the expression: 4 + 7xy^2 + 5y^3 + 10x -4xy^2 - 8x - 4y^3 + 9 - y^6 + 3x^2y^2 + 10x + 13 - y^3 + 3xy^2 + 2x + 13...
*Sunday, September 14, 2014 at 1:05pm*

**Math 221**

find the probability of the event rolling a number less than 6
*Sunday, September 14, 2014 at 12:56pm*

**Math**

In how many arrangements of the letters BERKELEY are all three E's adjacent? I think its (5!)*(6) i'm looking for some clarification.
*Sunday, September 14, 2014 at 12:29pm*

**Math**

If a plane has intercepts at 2a, 3a, and 4a along the three Cartesian coordinates where a is the lattice constant of the cubic cell, (i) find the Miller indices of the plane and (ii) find the distance between the neighboring planes parallel to this plane
*Sunday, September 14, 2014 at 12:27pm*

**8th grade homework**

Please help me I beg of you! My math teacher is awful and I have no idea how to do my pretest and she's picky about showing my work so it would be helpful if you could explain :) 1.six is subtracted from a number. The result is devided by four. This result is added to 10 ...
*Sunday, September 14, 2014 at 12:20pm*

**Math**

What is the answer to page 31 of pre-algebra with pizzazz (what do hair dressers do?) ?
*Sunday, September 14, 2014 at 11:27am*

**math**

The farmer wants to use the 500 m to an enclosure divided into two equal areas, What is the total maximum area that can is achieved with the 500 m fence. using differential calculus to the solution.
*Sunday, September 14, 2014 at 10:03am*

**Math**

6m by 5m by 4m , rectangular tank How do you know which one is the height?
*Sunday, September 14, 2014 at 9:37am*

**Math**

Mrs lim bought apples at a cost of $150 from the wholesaler. If she sells 1 pace of 5 apples at $2.40, what is the least number of apples she must sell in order to make a profit? I am kind of sure I need to use HCF(highest common factor) in this question.. I might be wrong ...
*Sunday, September 14, 2014 at 7:10am*

**math**

Determine the rule when gradient =2,x intercept =3 .can. anyone please explain,cause I know y intercept =c,but I don't know x intercept,thanks
*Sunday, September 14, 2014 at 6:13am*

**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 12.0 km from the launch point. Find the speed of the rocket.
*Sunday, September 14, 2014 at 5:49am*

**Math**

7^x-9=4^2x
*Sunday, September 14, 2014 at 5:38am*

**Math **

Find the equation of the graph of all points such that the difference of their distances from (10,0) and (2,0) is always 1.
*Sunday, September 14, 2014 at 4:55am*

**Math**

3^2x-3^x-24=0 Could you also teach me the process in answering it?
*Sunday, September 14, 2014 at 3:47am*

**Math**

Find how much interest $25,000 earns in 4 years in a certificate of deposit paying 8.5% interest compounded quarterly.
*Saturday, September 13, 2014 at 11:35pm*

**math**

Question 1.1. For each of the following questions, choose the correct answer. What is another word for rotation? (Points : 1) flip turn slide fall Question 2.2. What's another word for a translation? (Points : 1) flip turn slide fall Question 3.3. Maria slides a triangle ...
*Saturday, September 13, 2014 at 11:05pm*

**Math**

I wrote question you have not dissolved
*Saturday, September 13, 2014 at 10:56pm*

**Math**

Please solve the Q look ( nina, math)
*Saturday, September 13, 2014 at 10:41pm*

**Math**

What is the parent function of h(x) = -x^2? Is it h(x) = x^2 or h(x) = -x^2? How can I describe h(x) = -x^3 as a transformation of the parent function of a cubic function? Do I just say that it is a reflection, or is there a way of saying it with numbers, as in h(x) = x^3 - 4?
*Saturday, September 13, 2014 at 10:13pm*

**math**

find two numbers whose difference is 153
*Saturday, September 13, 2014 at 10:06pm*

**Math Proof**

Find a rational number and an irrational number between x=8.9949926 and y=8.995
*Saturday, September 13, 2014 at 9:57pm*

**Math**

Analyze Greg saw these numbers on a license plate while driving: 2,4,5,3 and 9 . Write one possible number that could be on the license plate. Help me,,
*Saturday, September 13, 2014 at 8:17pm*

**Math**

Challenge Write a 6 - digit number that has a 5 in the ten thousand place , a 3 in the thousands place ,a 4 in the tens place , and one digit that is 0.underline the 5,3,4,and the 0 in your number .is this the only number you could have written ? Expllain your answer and ...
*Saturday, September 13, 2014 at 8:02pm*

**math**

Angles B and F are corrsponding angles formed by a treversal intersecting two parallel lines. Angle B has a measure of 44. what is the measure of Angle F?
*Saturday, September 13, 2014 at 7:47pm*

**math**

find the distance, to the nearest tenth, from T(4,-2) to U(-2,3).
*Saturday, September 13, 2014 at 7:10pm*

**math**

2.Calculate the growth rate of Asset J dividends, we have to assume that future dividend payments will grow at a constant rate into the future forever. This constant rate can be estimated by calculating the average growth rate from the past dividends. Calculate Asset J’s ...
*Saturday, September 13, 2014 at 7:10pm*

**math**

simplify and state any restrictions: 1. x+3/x^2+11x+24 - 2x+10/x^2+11x+30 answer: -x-10/(x+8)(x+6) 2. x-4/x^2-8x+16 + 3x+21/x^2+12x+35 answer: 4x-7/(x-4)(x+5) i dont uderstand how to do it. can you please show me the steps. thanks
*Saturday, September 13, 2014 at 6:56pm*

**math**

write the fraction in words 4/7 3/4
*Saturday, September 13, 2014 at 5:30pm*

**math (create equation)**

A homeowner wishes to fence in three adjoining garden plots, as shown in the figure. If each plot is to be 80 ft^2 in area, and she has 88 feet of fencing material at hand, what dimension should each plot have? ---------- I I I I I I I I I I I I ----------
*Saturday, September 13, 2014 at 4:51pm*

**math (create equation)**

Abbie paints twice as fast as Beth and three times as fast as Cathie. If it takes 60 min to paint a living room with all three working togather, how long does it take for Abbie if she works alone?
*Saturday, September 13, 2014 at 4:46pm*

**math**

A student claims that to divide a number with the units digit 0 by 10, she just crosses out the 0 to get the answer. She wants to know if this is always true and why and if the 0 has to be the units digit. How do you respond?
*Saturday, September 13, 2014 at 2:41pm*

**math**

convert the following to representative fractions. 0 90 |__| , 1 cm = 0.9 km and 1 cm= 2000 km. please help, thanks
*Saturday, September 13, 2014 at 2:22pm*

**math**

when you throw up a cricket ball foot ball tennis ball and a basket ball which will go to a maximum height
*Saturday, September 13, 2014 at 12:19pm*

**math**

(please help me to solve this question) solving equation (1+x)^2/3 + (1-x)^2/3 = 4(1-x²)^1/3 are, value of x is
*Saturday, September 13, 2014 at 11:31am*

**math**

(please help me to solve this question) solving equation x+√(12p-x)/x-√(12p-x)= √(p)+1/√(p)-1 following roots are obtained
*Saturday, September 13, 2014 at 11:08am*

**math**

solving equation z²-6z+9=4√(z²-6z-6) following roots are obtained
*Saturday, September 13, 2014 at 11:00am*

**Math**

The maximum number of arbitrary constants is equal to a. Number of derivatives in the differential equation b. Degree of differential equation c. Order of differential equation e. None of the above I don't understand this, but my guess it's letter A. Please help.
*Saturday, September 13, 2014 at 9:56am*

**-Math-Desperate**

An investment adviser invested $14,000 in two accounts. One investment earned 4% annual simple interest, and the other investment earned 2.5% annual simple interest. The amount of interest earned for 1 year was $458. How much was invested in each account? looking for the ...
*Friday, September 12, 2014 at 11:11pm*

**MATH**

The length of a rectangle is 3 feet less than twice the width of the rectangle. If the perimeter of the rectangle is 144 feet, what is the length?
*Friday, September 12, 2014 at 10:52pm*

**In Response to Previous Math Question**

What parent function describes the set (-1, -1), (0, 0), (1, -1) (-2, -8), (2, -8)? So should I write f(x) = x^2 or f(x) = -x^2 for the parent function?
*Friday, September 12, 2014 at 9:51pm*

**Math(Geometry) beware its hard for sixth graders!**

In order to rescue Sela's cat, her mother propped a 19 foot long ladder against a tree at a 42° angle with the ground. How many feet above the ground was their cat? Round your answer to the nearest tenth of a foot? 1. 21.2 ft 2. 14.4 3. 12.7 4. 28.4 I NEED THE ANSWER ...
*Friday, September 12, 2014 at 9:44pm*

**Math**

A plane leaves Chicago headed for Los Angeles at 520 mph. One hour later, a second plane leaves Los Angeles headed for Chicago at 620 mph. If the air route from Chicago to Los Angeles is 1800 miles, how long will it take (after the first plane takes off) for the first plane to...
*Friday, September 12, 2014 at 9:39pm*

**Math**

An investment adviser invested $14,000 in two accounts. One investment earned 4% annual simple interest, and the other investment earned 2.5% annual simple interest. The amount of interest earned for 1 year was $458. How much was invested in each account? Need the amount at 4...
*Friday, September 12, 2014 at 9:37pm*

**math**

Every marble in a jar has either a dot, a stripe or both. The ratio of striped marbles to non-striped marbles is 3:1, and the ratio of dotted marbles to non-dotted marbles is 2:3. If six marbles have both a dot and a stripe, how many marbles are there all together?
*Friday, September 12, 2014 at 8:59pm*

**math**

v = 1/3 pie^2 h; solve for h
*Friday, September 12, 2014 at 7:14pm*

**math**

A plane leaves Chicago headed for Los Angeles at 520 mph. One hour later, a second plane leaves Los Angeles headed for Chicago at 620 mph. If the air route from Chicago to Los Angeles is 1800 miles, how long will it take (after the first plane takes off) for the first plane to...
*Friday, September 12, 2014 at 7:12pm*

**math**

Running at an average rate of 4 meters per second, a sprinter ran to the end of a track. The sprinter then jogged back to the starting point at an average rate of 2 meters per second. The total time for the sprint and the jog back was 2 minutes 6 seconds. Find the length of ...
*Friday, September 12, 2014 at 7:12pm*

**math**

An investment adviser invested $14,000 in two accounts. One investment earned 4% annual simple interest, and the other investment earned 2.5% annual simple interest. The amount of interest earned for 1 year was $458. How much was invested in each account
*Friday, September 12, 2014 at 7:11pm*

**math**

an object weighing 40 tons hits an object at 40 MPH what is the force of the impact?
*Friday, September 12, 2014 at 6:50pm*

**math**

Write .4(5) as a fraction. The parenthesis represent it as a repeating decimal: .455555555555555555555 But what is it in a fraction?
*Friday, September 12, 2014 at 6:47pm*

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