Saturday

April 18, 2015

April 18, 2015

**Branches of Math**

**Recent Math Questions**

**math**

If m=n,then m−n = n−m = 0. Give a counterexample to show that the conditional is false
*Sunday, March 22, 2015 at 11:09pm*

**math**

Find the angle of inclination of the equation 3x+2y+4=0
*Sunday, March 22, 2015 at 11:07pm*

**math**

The height of a baseball (h) in meters (t) seconds after it has been tossed out a window is given by the equation h= -5t^2 + 20t + 15. A boy shoots at the baseball with a trajectory of h= 3t +3. Will the paintball hit the baseball? If so at what height and time?
*Sunday, March 22, 2015 at 10:55pm*

**Math**

In a marketing survey involving 1,000 randomly chosen people, it is found that 630 use brand P, 420 use brand Q, and 210 use both brands. How many people in the survey use brand P and not brand Q? Answer choices: 210 people 420 people 630 people none of these is it 630?
*Sunday, March 22, 2015 at 10:32pm*

**Math**

How much more would there be at the end of 8 years if $4000 were invested at 14% compounded quarterly rather than semiannually? (Round your answer to the nearest cent.)
*Sunday, March 22, 2015 at 9:21pm*

**Math**

I had a table of values. X / Y -3/ 2.5 -2/ 5 -1/ 6.5 0 / 7 It asks without graphing. Does it open upward or downward. I got that in the quadratic equation. a= -0.5 And if a is smaller than 0. It opens downward However. The text book says it opens upward. So I'm confused
*Sunday, March 22, 2015 at 8:50pm*

**Math**

Pydrotinces comes in 50 mg/mL. A child is to get 2 mg. The volume in a miniscule of 0.04mL, which is really had to measure. Prepare a dilution so that final concentration is 5mg/mL. How much diluent well you need is the original products is 50mg/mL and you dilute the entire ...
*Sunday, March 22, 2015 at 8:29pm*

**Math**

a plane traveling at 400 mph leaves the philadelphia airport at 1pm heading due east. two hours later a second plane traveling at 600 mph leaves the airport heading in the same direction. at what time does the second plane overtake the first?
*Sunday, March 22, 2015 at 8:29pm*

**Chemistry**

I found this on the internet and I need an explanation. Q: You want to make sure a large weather balloon does not burst and wish to check the temperature at 3000 meters altitude. The balloon manufacture guarantees the balloon up to 60.0 Liters in size. Will the balloon make it...
*Sunday, March 22, 2015 at 8:15pm*

**Math**

Is this correct- 5 squared + 8 divided by 2 = 29
*Sunday, March 22, 2015 at 7:51pm*

**math**

If you have a bag of alphabet tiles that contains one tile for each letter of the alphabet. What is the probability that you will pull a vowel?
*Sunday, March 22, 2015 at 7:48pm*

**math**

2 lines are given by kx+6y-5=0 and 3x+2y+4=0 if they are parrallel what is the value of k
*Sunday, March 22, 2015 at 7:29pm*

**Math**

There are 47 students in the marching band. There are 5 students in te first row, and the rest are in equal rows of 6. How many students are in each of the 6 rows?
*Sunday, March 22, 2015 at 6:58pm*

**Math**

Horses are measured in units called hands. One hand equals 1/3 foot. A horse is 5 1/3 feet tall. How tall is this horse in hands?
*Sunday, March 22, 2015 at 6:27pm*

**Math**

1. In the xy-plane, a circle has its center at the point with coordinates (4,3), and the origin lies on the circle. The point with which of the following coordinates also lies on the circle? A. (-4,-3) B. (3,4) C. (6,8) D. (7,7) E. (9,8) How do you do this?
*Sunday, March 22, 2015 at 5:45pm*

**math **

Mr Lopez is putting a fence around his vegetable garden.The garden is shaped like a rectangle.The longer sides are 14 feet long and he shorter sides are 9 and a half feet long.How much fencing should he buy?
*Sunday, March 22, 2015 at 5:45pm*

**Math**

1. A door has a lock with a 5-digit keypad. To unlock the door, a person must enter a passcode consisting of three different digits, with each digit entered in the correct order. What is the probability that a randomly chosen passcode consisting of three different digits ...
*Sunday, March 22, 2015 at 5:05pm*

**math**

Sara wants to increase her training so that she does 70 sit-ups in week 2. Type an equation that shows how many more sit-ups Sarah would have to do in week 2 my answer is 65+t=70 the value of the t=5
*Sunday, March 22, 2015 at 3:39pm*

**Math**

1. Rishi ram obtained an installment loan for $3,000.00. He agreed to repay the loan in 6 monthly payments. His monthly payments is $516.50. What is the APR? MY ANSWER=0.33% 2. Tim Newman took out a simple interest loan of $1500 at a 10 percent interest for 12 months. After 4 ...
*Sunday, March 22, 2015 at 2:57pm*

**Math**

Hi. I have a few math questions I need some help with. Hamid Husain took out a $50,000, 5-year term policy at age 50. The premium per $1,000 was $4.80. He will be 55 years old this year. The premium per $1,000 will be $6.58. What is the percent increase? MY ANSWER 37.0833% (...
*Sunday, March 22, 2015 at 2:55pm*

**math**

A group of 15 of your friends wants to go to a concert. Unfortunately, you only have 10 tickets available to give to your friends. How many different groups of friends could you take to the concert?
*Sunday, March 22, 2015 at 2:21pm*

**math**

six cards are numbered 1 1 6 7 11 and 12 cards are chosen without replacement until a card number 1 is chosen. find the probability that this happens before the third card is chosen
*Sunday, March 22, 2015 at 2:19pm*

**Math**

A rectangular house measures 75ft by 50ft. Find the cost of installing gutters around the house if the cost is $4per foot?
*Sunday, March 22, 2015 at 2:00pm*

**Math**

What is the final volume of 100ml,2 oz, and 1 tsp ?
*Sunday, March 22, 2015 at 12:00pm*

**math**

Kool Klothes has determined that the revenue function for selling x thousand pairs of shorts is R(x) = -5x^2 + 21x. The cost function C(x) = 2x + 10 is the cost of producing the shorts. a) How many pairs of shorts must the company sell in order to break even
*Sunday, March 22, 2015 at 10:51am*

**Math**

Alicia has a flat platter shaped like a square with a semicircle of diameter 10 inches on each edge, as pictured. What is the number of inches in the side length of the smallest square ABCD that can contain the platter? I drew a diagram so far, but I don't know what to do ...
*Sunday, March 22, 2015 at 9:45am*

**math**

Squares of side x units are cut of the corners of a square piece of cardboard of side 6 units. The sides are then folded to make an open box. Calculate the volume of the box in terms of x.
*Sunday, March 22, 2015 at 9:33am*

**math**

3 times 2 and 2/5
*Saturday, March 21, 2015 at 9:55pm*

**Math**

Kool Klothes has determined that the revenue function for selling x thousand pairs of shorts is R(x) = -5x^2 + 21x. The cost function C(x) = 2x + 10 is the cost of producing the shorts. a) How many pairs of shorts must the company sell in order to break even
*Saturday, March 21, 2015 at 9:47pm*

**math**

For what values of k does the line y= x + k pass through the circle defined by x^2 + y^2 = 25 at: a) 2 points b) 1 point c) 0 points
*Saturday, March 21, 2015 at 8:54pm*

**MATH**

for what value(s) of k does the equation kx - 10 - 5x^2 have: a) one real solution b) two distinct real solutions c) no real solution
*Saturday, March 21, 2015 at 8:53pm*

**math**

The function h(t)= 2 + 50t - 1.862t^2, where h(t) is the height in metres and t is the time in seconds, models the height of a golf ball above the planet Mercury's surface during its flight. a) What is the maximum height reached by the ball b) How long will the ball be ...
*Saturday, March 21, 2015 at 8:51pm*

**Math**

Hi! My teacher wanted me to sketch the graph of solution set of each system. For the first question, she wants me to use the slope intercept form and the second question using a table of values, but, I'm a little lost. Can someone help? Thanks! 1.) 3x + 2y < 6 x > 0 ...
*Saturday, March 21, 2015 at 7:52pm*

**math **

Point X is on side of line AC of triangle ABC such that <AXB = <ABX, and <ABC - <ACB = 39 degrees. Find <XBC in degrees.?
*Saturday, March 21, 2015 at 7:40pm*

**Math**

1. Rishi ram obtained an installment loan for $3,000.00. He agreed to repay the loan in 6 monthly payments. His monthly payments is $516.50. What is the APR? MY ANSWER=0.33% 2. Tim Newman took out a simple interest loan of $1500 at a 10 percent interest for 12 months. After 4 ...
*Saturday, March 21, 2015 at 7:36pm*

**math**

A box contained some red, blue, and green markers. For every 5 red markers, there were 2 blue markers. For every 3 blue markers, there were 5 green markers. a.Find the ratio of red markers to blue markers to green markers. b.When 6 red markers were removed...
*Saturday, March 21, 2015 at 7:31pm*

**math**

There are 32 more apples than oranges in a box. 3/5 of the oranges and 1/3 of the apples are overripe. If the number of overripe apples and the number of overripe oranges are the same, how many pieces of overripe fruit are there?
*Saturday, March 21, 2015 at 7:30pm*

**Math help check **

Which polynomial does the model represent? The model shows 1 black square block, 2 white thin blocks, 1 black thin block, 1 white small square block, 3 black small blocks. a –x³ + 2x² – 3x + 2 b. x² + x – 2 c. –x² – x + 2 d. –x...
*Saturday, March 21, 2015 at 6:26pm*

**Math check **

1.(2x)(10x) A)20x* B)12x C)20x^2 D)5x 2.-3m(m + 8) A)-3m^2 + 24 B)-3m^2 - 24m C)-24m D)-4m + 5* 3. 4d(2d-9) A)8d - 36d* B)-d C)-28d^2 D)8d^2 - 36d 4. (3x + 4)(x-2) A)3x^2 - 2x - 8 B)x - 8 C)3x - 2x - 8* D)3x^2 + 2x + 8 5. (2y - 1)(4y - 3) A)-2y + 3* B)8y^2 - 10y - 3 C)8y^2 - ...
*Saturday, March 21, 2015 at 5:41pm*

**Math**

1. Michael Koepler received his bank statement and canceled checks for October. His previous balance was $998.41. In October, he deposited $177.00 and wrote checks totaling $378.00. What was the ending balance for that month? MY ANSWER- I am unsure if the answer is $797.41 or...
*Saturday, March 21, 2015 at 5:08pm*

**math**

What would be the final cost of a theater ticket that cost $6.00 and a discount rate of 15 percent was added to it?
*Saturday, March 21, 2015 at 3:26pm*

**Math**

Amanda Sabino's taxable income is $20,900.00. How much will she pay in state tax? Tax Table- First $2,000: 2.0% rate Next $4,000: 3.0% rate Next $4,000: 4.5% rate Over $10,000: 6.0% rate My answer-$1254 Am I correct? Thank you!!
*Saturday, March 21, 2015 at 2:45pm*

**Math**

Hello I need some help with these questions. A survey of 115 children found that 39 liked The Little Mermaid 43 liked 101 Dalmatians 56 liked Mickey Mouse 7 liked The Little Mermaid and 101 Dalmatians 10 liked The Little Mermaid and Mickey Mouse 16 liked 101 Dalmatians and ...
*Saturday, March 21, 2015 at 2:41pm*

**Math**

A document that measures 28 centimeters by 20 centimeters is enlarged by a scale factor of 3/2. What are the dimensions of the enlarged documents?
*Saturday, March 21, 2015 at 2:32pm*

**math**

adult tickets are $17, student tickets are $9. how many adult and student tickets need to be sold to make a profit of $4,400?
*Saturday, March 21, 2015 at 1:53pm*

**Math**

Hi! My teacher wanted me to sketch the graph of solution set of each system. For the first question, she wants me to use the slope intercept form and the second question using a table of values, but, I'm a little lost. Can someone help? Thanks! 1.) 3x + 2y < 6 x > 0 ...
*Saturday, March 21, 2015 at 12:40pm*

**math **

Solve the initial value problem d^2x/dt^2+2dx/dt-3x = 0, x(2π) =1, x(2π) = 13
*Saturday, March 21, 2015 at 12:35pm*

**math **

Rectangle WXYZ is drawn on triangle ABC, such that point W lies on segment AB, point X lies on segment AC, and points Y and Z lies on segment BC, as shown. If <BWZ=26 degrees and <CXY=64 degrees, what is<BAC, in degrees?
*Saturday, March 21, 2015 at 12:24pm*

**math**

ABC is an isosceles triangle inscribed in a circle. If AB and AC equal to 2.5cm and BC is 14cm find the radius of the circle
*Saturday, March 21, 2015 at 11:54am*

**math**

Assume that on a weekday one telephone number out of every ten being called is busy. If 6 randomly selected numbers are called what is the probability that at least three of them be busy?
*Saturday, March 21, 2015 at 11:50am*

**math**

If a power failures occur according to a poisson distribution with an average of 3 failures every twenty weeks,calculate the probability that there will not be more than one failure during a particular week.
*Saturday, March 21, 2015 at 9:40am*

**Math, Intergration**

C(T)=0.78125-0.5e^(-0.64T) (T+1.5625) Using this equation, I don't understand 'Intergration by parts' to show this and what it means Any help is appreciated!
*Saturday, March 21, 2015 at 9:26am*

**Math**

Hi I'm having a bit of trouble if anyone is able to help, thanks! Using the substitution u =1-2t^2, show that A = -1/4 ∫_1^(-7)▒e^u du
*Saturday, March 21, 2015 at 7:33am*

**math**

Calculate the mean value for the number of heads appearing in a simultaneous throw of 3 coins.
*Saturday, March 21, 2015 at 7:04am*

**math**

The arrow is spun several times until it stops at a number 4. Find the probability that this happens on the third spin.
*Saturday, March 21, 2015 at 6:54am*

**math - URGENT**

I'm don't understanding how to solve this question: The graph of a line passes through the x-intercept of y-20=2/11(x-31) and is perpendicular to the line y=1/7x+7 . The equation of the line, written in Slope-Point form, is y-p = m(x-q). what is the value of m*q ?
*Saturday, March 21, 2015 at 2:43am*

**MATH!!!**

What is the equation for the line that passes through W(-10,-9) and is parallel to y=5/32x-10 ? Thank you....
*Saturday, March 21, 2015 at 2:34am*

**math -ans check**

two points on the graph of a linear function are (-3,5) and (-1,4). Determine the equation of the function in slop-point form. ans: m=-1/2 I pick a point (-1,4) y-y1=m(x-x1) y-4=-1/2(x-(-1)) y-4=-1/2(x+1) Thank you ^^
*Saturday, March 21, 2015 at 1:35am*

**math _ HELP !!**

two points on the graph of a linear functions are (-3,5) and (-1,4). Determine the equation of the function in slope form ? can someone help explain in step ? Thanks
*Saturday, March 21, 2015 at 12:15am*

**Math**

Skate boarding boys= 2 girls=1 What percentage of the total students chose skateboarding? A. 10% B. 20% C. 30% D. None of these Is the answer D? Thank you
*Saturday, March 21, 2015 at 12:01am*

**Math**

a horse race has 14 entries and one person owns 3 of those horses. assuming that there are no ties, what is the probability that those three horses finish first, second and third?
*Friday, March 20, 2015 at 11:36pm*

**math**

if I bought 3 items at 24.95 and 2 items at 45 and they were all 30% off, If I had bought these 5 items without the 30$ off what would I have paid
*Friday, March 20, 2015 at 10:55pm*

**math**

There are 32 more apples than oranges in a box. 35 of the oranges and 13 of the apples are overripe. If the number of overripe apples and the number of overripe oranges are the same, how many pieces of overripe fruit are there?
*Friday, March 20, 2015 at 9:21pm*

**math**

A box contained some red, blue, and green markers. For every 5 red markers, there were 2 blue markers. For every 3 blue markers, there were 5 green markers. a.Find the ratio of red markers to blue markers to green markers. b.When 6 red markers were removed...
*Friday, March 20, 2015 at 9:20pm*

**Math**

There are red and blue marbles in a jar. There are 2 more red marbles than blue. There are 8 marbles in all. How many red marbles? How many blue marbles?
*Friday, March 20, 2015 at 9:03pm*

**math**

Silvia has twice as much money invested at 5% simple interest as she does at 4%. If her yearly income from the two investments is $266, how much does she has at each rate? 4% = 5% =
*Friday, March 20, 2015 at 7:25pm*

**College Math**

An open-topped rectangular box is to be constructed from a 24 inch by 36 inch piece of cardboard by cutting out squares of equal sides from the corners and then folding up the sides. What size squares should be cut out of each of the corners in order to maximize the volume of ...
*Friday, March 20, 2015 at 6:07pm*

**math**

A store mixes peanuts worth $10 per pound and biscuit worth $13 per pound. The mixture is to sell for $12 per pound. Find how much of each should be used to make a 432 pound mixture.
*Friday, March 20, 2015 at 4:27pm*

**math**

Mary and John are 128 miles apart. A car leaves Mary traveling towards John and another car leaves John at the same time traveling towards Mary. The car leaving Mary averages 10 miles per hour more than the other car and they meet after 1 hour and 36 minutes. What are the ...
*Friday, March 20, 2015 at 4:22pm*

**math**

Seven people rowed 12 miles downstream with the current in 1.5hrs. Coming back upstream against the current covered the same distance but took 4 hours. Find the people rowing rate in the still water and the rate of the current
*Friday, March 20, 2015 at 4:16pm*

**math**

Beans meal is 16% protein flour meal is 8% protein. How many pounds of each should be mixed together to get 32 pounds mixture that is 13% protein how many pounds of the flour meal should be in the mixture
*Friday, March 20, 2015 at 4:12pm*

**math**

June has twice as much money invested at 5% simple annual interest as she does at 4 %. If her year income from the two investment is $315 how much does she have at each rate?
*Friday, March 20, 2015 at 4:05pm*

**math**

Mr Jacob has twice as much money invested at 5% simple annual interest as he does at 4%. If his yearly income from the two investment is $126, how much does he has at each rate?
*Friday, March 20, 2015 at 3:24pm*

**math**

A conducting rod of mass 30 g and length 48 cm has holes drilled near each end so that it is free to slide in a vertical direction along two conducting rails as shown in the figure below. A current of 240 A is made to flow through an identical rod at the bottom of the assembly...
*Friday, March 20, 2015 at 2:19pm*

**math**

My car gets 26 miles per gallon, I have to drive 36 miles, gas price is $3.10 per gallon. How much money will I need?
*Friday, March 20, 2015 at 1:31pm*

**math**

Trent wants to build a rectangular pen for his animals. One side of the pen will be against the barn; the other three sides will be enclosed with wire fencing. If Trent has 400 feet of fencing, what dimensions would maximize the area of the pen?
*Friday, March 20, 2015 at 12:06pm*

**Math**

Connie made deposits of $2000 at the beginning of each year for four years. The rate she earned is 5% annually. What is the value of Connie's account in four years?
*Friday, March 20, 2015 at 10:51am*

**Tsi math**

A rectangular room measures 20 by 7 feet Find the cost of installing a strip of wallpaper around the room if the wallpaper costs $0.98
*Friday, March 20, 2015 at 9:42am*

**math**

3/5 of the people at a funfair were children. 3/4 of the remaining people were men. There were 140 more children than women. How many people went to the funfair?
*Friday, March 20, 2015 at 9:26am*

**math**

Sam had 80 foreign stamps and local stamps. After giving away13of his foreign stamps and 10 local stamps, he had an equal number of foreign stamps and local stamps left. How many local stamps did he have in the beginning?
*Friday, March 20, 2015 at 9:25am*

**math**

Solve the following ordinary differential equations. I) (2y+x^2+1)dy/dx+2xy-9x^2=0 ii) d^2/dx^2+3day/DX+2y=x^2
*Friday, March 20, 2015 at 5:12am*

**math**

An object of mass 100g is thrown vertically upward from a point 60cm above the earths surface with an initial velocity of 150cm/sec. It rises briefly and then falls vertically to the earth, all of which time it is acted on by air resistance that is numerically equal to 200v (...
*Friday, March 20, 2015 at 2:23am*

**Math**

1. A carton contains b boxes of paper plates, and each box contains n plates. If the carton costs c dollars, what is the cost per paper plate, in dollars, when the plates are bought by the carton? a. cbn b. c/bn c. bn/c d. cn/b e. n/cb I do not know which. I got something like...
*Friday, March 20, 2015 at 2:07am*

**math**

building A is 180 feet shorter than building B. The total height of the two building is1480 feet. find the length of each building
*Friday, March 20, 2015 at 1:51am*

**math 5th grade**

A snail is crawling up the side of a wall that is 3 meters high. Each day, he crawls up 40cm. The first night, he slips back down 2cm; the second night he slips down 4cm; the third night he slips down 6cm; and so on at the same rate.(He was getting more tired each night!) How ...
*Friday, March 20, 2015 at 1:00am*

**math **

Point X is on side AC of triangle ABC such that <AXB =<ABX, and <ABC - <ACB = 39 degrees. Find <XBC in degrees.
*Thursday, March 19, 2015 at 10:53pm*

**math(Discrete)**

Give the negation of the statement ∃! x ∈ U [P (x)].
*Thursday, March 19, 2015 at 10:51pm*

**math **

Point X is on side AC of triangle ABC such that <AXB =<ABX, and <ABC - <ACB = 39 degrees. Find <XBC in degrees.
*Thursday, March 19, 2015 at 10:46pm*

**math **

This can be proven by using congruent triangles. Because ACX=YCB are two adjacent angles, one angle is <ACB and the other being an angle that forms an equilateral triangle (which is 60 degrees), it means that ACX=<YCB=<ACB+60. Now we can see that AC=YC, and CX=CB, ...
*Thursday, March 19, 2015 at 10:31pm*

**math(Discrete)**

Determine whether the statement ∀x ∈ Z, ∃y, z ∈ Z[x = 5y + 7z] is true or false. Explain.
*Thursday, March 19, 2015 at 9:54pm*

**Math Help Please!!!**

Use the function rule to complete the table Table= x= -2, -1, 0, 1, 2 y= (figure out y) Function rule= -10x+y=4
*Thursday, March 19, 2015 at 9:42pm*

**math**

Travel 35mph,to reach spot 27 miles away, traveling 2/3 of hour will I reach spot? How long will it take to reach spot?
*Thursday, March 19, 2015 at 9:26pm*

**Math**

A rectangular garden dimensions 30m by 20m and is divided into 4 parts by two pathways that run perpendicular from its side. One pathways has a width 8dm and 7dm. What is the total useble area of the garden?
*Thursday, March 19, 2015 at 7:55pm*

**Math**

A taxi ride costs $3 plus $2.50 per mile. Write the equation.
*Thursday, March 19, 2015 at 7:43pm*

**math**

on a weekend road trip the jensen family drove 210 miles on highways, where their car gets 35 miles for each gallon of gas and 54 miles on city streets where their car gets 18 miles for each gallon. How many gallons of gas did they use?
*Thursday, March 19, 2015 at 7:04pm*

**math**

The sum of two consecutive integers is –49. Write an equation that models this situation and find the values of the two integers.
*Thursday, March 19, 2015 at 7:03pm*

**Delete Question**

Is it possible to have this question deleted since I figured out how to do it? Thanks! Subject: Math Date: Thursday, March 19, 2015 Time: 3:13 PM
*Thursday, March 19, 2015 at 6:49pm*

**Math**

Determine whether the statement ∀x ∈ Z, ∃y, z ∈ Z[x = 5y + 7z] is true or false. Explain.
*Thursday, March 19, 2015 at 6:39pm*

**Math**

Give the negation of the statement ∃! x ∈ U [P (x)].
*Thursday, March 19, 2015 at 6:34pm*

**Math**

Zain goes swimming. He swims the first length of the pool in 2.5 minutes. The time he takes to swim each length is 10 seconds more than he took to swim the previous length. A. Find the time Zain takes to swim the fifth length. B. Find the time taken for Zain to swim a total of...
*Thursday, March 19, 2015 at 6:28pm*