Wednesday

July 30, 2014

July 30, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**math**

y=a-x solve for x
*Tuesday, May 27, 2014 at 2:43pm*

**math**

Where K is a constant to be determined. If it took Ian 45 minutes to exit the stadium when there were 5,000 people who drove and 1,500 people who took public transportation, how much time will it take Ian to exit if there are 12,500 people who drove and 4,00 who took public ...
*Tuesday, May 27, 2014 at 2:32pm*

**math**

Where K is a constant to be determined. If it took Ian 45 minutes to exit the stadium when there were 5,000 people who drove and 1,500 people who took public transportation, how much time will it take Ian to exit if there are 12,500 people who drove and 4,00 who took public ...
*Tuesday, May 27, 2014 at 2:31pm*

**7th grade Math (polynomials)**

How do you write a polynomial in standard form? Ex. 1.1x-8.5x^3
*Tuesday, May 27, 2014 at 2:08pm*

**math**

Write the number of permutations in factorial form. Then simplify. J K L M N O P 7! 720 8! 40,320 7! 49 7! 5,040 I think it is d.
*Tuesday, May 27, 2014 at 1:50pm*

**math**

factorize :x2-2X+xy-2y
*Tuesday, May 27, 2014 at 10:47am*

**7 grade math**

Consider two types of nonlinear equations. What unique quality does each possess and how does that quality cause the graph's unique shape? Name two unique examples of these shapes in real-world situations.
*Tuesday, May 27, 2014 at 8:29am*

**Math**

Find the derivative of the following function: (x^2)^sinx.
*Tuesday, May 27, 2014 at 6:32am*

**Math**

Q1. A population has a mean of µ = 80 with σ = 20. a. If a single score is randomly selected from this population, how much distance, on average, should you find between the score and the population mean? 20 because the standard deviation is 20 b. If a sample of n...
*Tuesday, May 27, 2014 at 6:17am*

**math**

A solid sphere of radius Xcm is placed in a cylinder of radius 2Xcm and height 2Xcm. The cylinder is then filled with water to the brim and the solid gently withdrawn. Find d volume of d water in d cylinder in cm3
*Tuesday, May 27, 2014 at 5:19am*

**math**

Aislyn decides to research attendance at sporting events for her project. She finds data on average attendance per game at San Diego Chargers (CA) football games and at Dallas Cowboy (TX) football games. The table shows the average attendance for each team for the 2000 season ...
*Tuesday, May 27, 2014 at 1:24am*

**math**

2 1/10* 2 1/7=
*Monday, May 26, 2014 at 11:59pm*

**math**

54. The volume of certain rectangular solid is 12x. If the dimensions of the solid are the integers x,y,and z,what is the greratest possible value of z? a. 36 b. 24 c. 12 d. 6 e. 4 please answer and explain
*Monday, May 26, 2014 at 10:38pm*

**math**

When x is divided by 3,the remainder is z.In terms of z, which of the following could be equal to x ? a. z-3 b. 3-z c. 3z d. 6+z e. 9+2z please answer and explain
*Monday, May 26, 2014 at 10:35pm*

**Math**

These two box and whisker plots show the results of a science test. Plot 1: Minimum:65, Maximum:95, Median:82, 1st Quartile:67, 3rd Quartile:88 Plot 2: Minimum:57, Maximum:100, Median:92, 1st Quartile:78, 3rd Quartile:93 What does this information tell you about the results? A...
*Monday, May 26, 2014 at 10:20pm*

**Math**

There are 30 seniors, 15 juniors, 12 freshman, and 10 sophomores in the club. When one student is picked randomly, what is the probability that a sophomore is not chosen? 57/67?
*Monday, May 26, 2014 at 9:19pm*

**math**

The question is there are 18 students in a class. Each day the teacher randomly selects three students to assist in a game: a leader, a recorder, and a timekeeper. In how many possible ways can the jobs be assigned? so first is 1 out of 18 then since one was picked, now it is ...
*Monday, May 26, 2014 at 9:09pm*

**Math**

The probability of rolling a number less than 4 on a number cube is ____ 1/2?
*Monday, May 26, 2014 at 8:56pm*

**Math**

The underside of a bridge has a shape of a parabolic arch. It has a maximum height of 30m and a width of 50m. Can a sailboat with a mast of 28m above the water pass under the bridge 8m from the middle of the bridge?
*Monday, May 26, 2014 at 8:38pm*

**Math**

A 10m by 20m pool is to be surrounded by a deck of uniform width. The area of the deck is twice the area of the pool, what is the width of the deck?
*Monday, May 26, 2014 at 8:36pm*

**Math**

At a park, a landscaper wishes to plant a uniform border of tulips around the outside of a 18m by 12m rectangular garden. The garden will look best if the area of the tulip border is half the area of the garden. How wide should the border be?
*Monday, May 26, 2014 at 8:34pm*

**Math**

A model rocket is launched from a roof of a building. Its path is described by the relationship h=-5t*2+35t+10, where h is the height in metres and t is the time in seconds. How tall is the building? What is the maximum height that the rocket will reach? When will the rocket ...
*Monday, May 26, 2014 at 8:32pm*

**Math**

The altitude of a triangle is 2cm longer than its base. The area of the triangle is 60 cm*2. What are the dimensions of the triangle?
*Monday, May 26, 2014 at 8:30pm*

**Math**

The path of a basketball foul shot is modelled by the relation h=-0.44d*2+4.4d+7, where h is the height in feet and d is the horizontal distance in feet. At what height is the ball released? What was the maximum height the ball reached? The centre of the basket is 14 feet away...
*Monday, May 26, 2014 at 8:25pm*

**Math**

A rectangle garden measures 15m by 24m. A larger garden is to be made by increasing each side by the same amount. The resulting area is to be 1.5 times the original area. Find the dimensions of the new garden to the nearest tenth of a metre.
*Monday, May 26, 2014 at 8:22pm*

**math**

A rectangle has a perimeter of 23cm. Its area is 33 cm*2. Determine the dimensions of the rectangle.
*Monday, May 26, 2014 at 8:18pm*

**math**

Given: R=(1,2,3,4,) A=(0,2,4,6) P=(1,3,5,7) What is R U P U= the symbol actually is an upside down U. We didn't learn this symbol so I do not know what to do. Can you help? answer choices are: 1) (0,1,2,3,4,5,6,7) 2) (1,2,3,4,5,7) 3) (1,3) 4) (2,4) Thank you for helping ...
*Monday, May 26, 2014 at 8:05pm*

**math**

rachel drove 260 miles using 12 gallons of gas. at this rate, how many gallons of gas would she need to drive 286 miles?
*Monday, May 26, 2014 at 7:27pm*

**Math, grade 10**

Two whole numbers add to 17 and the sum of their squares is 185. What are the numbers
*Monday, May 26, 2014 at 5:29pm*

**Math, grade 10**

Two numbers add to 18. If you square the larger number and add 6 times the smaller number you get 163. What are the numbers. Solve with quadratic equation?
*Monday, May 26, 2014 at 5:04pm*

**math**

The slope of a bike is 1,9 and rises 4 feet. What is the horizontal distance covered by this jump?
*Monday, May 26, 2014 at 4:26pm*

**math**

A wheelchair ramp rises 5 feet over a horizontal distance of 15 feet. What is the slope of this ramp?
*Monday, May 26, 2014 at 4:25pm*

**math**

solve the inequality -5(x-7)<15 algebraically for x -5(x-7)<15 -5x+35<15 -35 -35 -5x,-25 -5 -5 divide both sides by -5 x=5 is this correct? Thanks for checking my work.
*Monday, May 26, 2014 at 4:03pm*

**math**

Oatmeal is packed in a cylindrical container The diameter of the container is 13cm and its height is 24 cm. Determine in terms of TT (pi), the volume of the cylinder, in cubic centimeters v=TTr^2h v=TT6.5^2(24) v=1014 TT(pi) Is this correct? Thanks for checking my work
*Monday, May 26, 2014 at 3:56pm*

**math**

what would the graph of y=x^2+1 look like A. a straight line B. a parabola C. a dotted line D. none of the above
*Monday, May 26, 2014 at 12:19pm*

**math**

Mrs. Sue please help! A true-false test has 12 questions. What is the probability of guessing the correct answers to all of the questions? (1 point) 1 over 4096 1 over 144 one over twenty four 1over14
*Monday, May 26, 2014 at 11:50am*

**Math**

Mrs. Sue please help me! 7. A bag contains 7 green marbles, 9 red marbles, 10 orange marbles, 5 brown marbles, and 10 blue marbles. You choose a marble, replace it, and choose again. What is P(red, then blue)? (1 point) seventy-seven over one hundred sixty-four nineteen over ...
*Monday, May 26, 2014 at 11:27am*

**Math**

If a vehicle travels 1320 feet in seven seconds from a dead stop , how long does it take for that same vehicle to travel 1313 feet from a dead stop ?
*Monday, May 26, 2014 at 10:37am*

**business math**

Posted by bibi on Sunday, May 25, 2014 at 6:42pm. I need help can someone Help please. Thank everyone. I really appreciated. Break-even Analysis. the R from selling x units of a product is R=139.95x the Cost C of producing units is C=97X+850. In order to obtain a profit, the ...
*Monday, May 26, 2014 at 9:57am*

**math**

if i an 100' from a tree and the angle to the top is 24 degrees how tall is the tree
*Monday, May 26, 2014 at 9:37am*

**math**

what is the rule if input is 23 and output is 56
*Monday, May 26, 2014 at 7:06am*

**geometry math help**

"the inside of a carton is measured and is found to be width of 40cm, length 60cm and depth 30 cm. it is to be packed 2 layers deep with cylindrical tins that have a radius of 5cm and height of 15cm (outside measurements)." a) show that 48 tins can be packed into the...
*Monday, May 26, 2014 at 4:06am*

**math**

How much money I saved if I follow this number pattern 5,10,15,?20?30
*Monday, May 26, 2014 at 3:36am*

**math**

If a number increases from 2,000 to 2,610 what is the rate of increase?
*Monday, May 26, 2014 at 12:43am*

**math**

what is the slope of the line represented by the equation 4x+3y=12 1) 4/3 2) 3/4 3) -3/4 4)-4/3 I did 4x+3y=12 -4x -4x 3y=-4x+12 /3 /3 divide each side by3 y=-4/3x+4 so I got answer 4 because the -4/3 is the slope Is this correct? Thanks for checking my work
*Sunday, May 25, 2014 at 10:21pm*

**math**

the question is what is the solution of the equation x+2/2=4/x? 1) 1 and-8 2)2 and-4 3) -1 and9 4) -2 and4 I did x^2+2x+8 (x+4)(x+2) -4 -2 This is not one of the choices can you help me figure out where I went wrong. Thanks for your help
*Sunday, May 25, 2014 at 9:46pm*

**Math - Personal Finance**

Ina is negotiating a mortgage of $145 000 for her new house. Determine Ina's monthly payments for a mortgage at 5% annum, compounded semi-annually, amortized over 25 years. How much will Ina pay over the 25 years to pay off this mortgage?
*Sunday, May 25, 2014 at 9:29pm*

**math**

The Washington Monument is 169 meters high. Find the angle of elevation to the nearest degree to the top of the monumenmt from a point .5 km from the base.
*Sunday, May 25, 2014 at 8:49pm*

**math**

Draw a rectangle to show that 5(x+2) and 5x + 10 are equivalent.
*Sunday, May 25, 2014 at 6:55pm*

**business math**

Break-even Analysis. the R from selling x units of a product is R=139.95x the Cost C of producing units is C=97X+850. In order to obtain a profit, the revenue must be greater than the cost. A)complete the table x 10 20 30 40 50 60 R C B) for what values of x will this product ...
*Sunday, May 25, 2014 at 6:42pm*

**business math**

the annual sales S (in billion of dollars) of oracle corporation from 2004 through 2009 can be approximated by the linear equation S= 2.903t-1.98, 4 is less than proximally T less than proximally 9, where t represents the year, with t=. use the model to 4 corresponding to 2004...
*Sunday, May 25, 2014 at 6:31pm*

**business math**

Salary Increase.you accept a new job with a starting salary of 34,800. you are told that you will receive an annual raise of at least 1,500. what is the maximum number of years you must work before your annual salary will 45,000
*Sunday, May 25, 2014 at 6:04pm*

**math**

write each product using an exponent. then find the value: 7 to the 4th power
*Sunday, May 25, 2014 at 4:25pm*

**need help1 what function to use? math**

An airplane approaches a runway at a 3 degree angle of depresssion. If the plane is flying at 30,000 ft., find the ground distance from the airport to the point directly below the plane when the pilot begins the descent. Round your answer to the nearest foot.
*Sunday, May 25, 2014 at 4:06pm*

**math**

write an integer to represent each piece of data: Jan earned 7 dollars interest in her savings account last month.
*Sunday, May 25, 2014 at 3:57pm*

**math**

2n + m n = 1/2 m = 2/5
*Sunday, May 25, 2014 at 3:23pm*

**math**

An object is thrown or fired straight upwards at an initial speed of v_0 ft⁄s will reach height h feet after t seconds, where h and t are related to the formula h=-16t^2-v_0 t Suppose the object is fired straight upwards with an initial speed of 800ft⁄s, What is ...
*Sunday, May 25, 2014 at 3:09pm*

**math question**

How do i solve this? If it helps i think its B. from how i did it but i dont think i worked it out right X/4 + 1= -6 A.2 B.-4 C.-22 D.-28
*Sunday, May 25, 2014 at 2:40pm*

**math**

Evaluate for each expression m = 2/5 and n = 1/2 1) 2m + n 2) 2m - n Please explain so I can understand the rest of the questions.
*Sunday, May 25, 2014 at 2:38pm*

**Business Math**

Ace Formalwear buys tuxedos from a supplier and has an invoice amount of $27,700. The terms of the sale are 3/20, n/30. If Ace sends a partial payment of $7,400 on the discount date, what is the net amount still due?
*Sunday, May 25, 2014 at 2:36pm*

**Math**

Helping grandson with math. I would like to know how to do it before he does. "How many different rectangles can be made with a perimeter of 20 units? (Remember, a square is also a rectangle.)"
*Sunday, May 25, 2014 at 1:05pm*

**Math functions help**

given f(x) = 1-2x, and g(x) = x^2+1, find: a) g(-2) ---- i get 5 ? b) f(x+1) c) g`f(x) --- there is like a degree symbol circle between g and f.. d) f^-1(x)
*Sunday, May 25, 2014 at 9:02am*

**quadratics math**

the height of a triangle is 4cm shorter than its base. if the triangle has an area of 48cm2, find the length of the base of the triangle.
*Sunday, May 25, 2014 at 8:27am*

**logarithm math help**

express: In(√x / y^2z ) thanks :)
*Sunday, May 25, 2014 at 8:15am*

**math quadratic equations**

a) expand and simplify: (4x-3)(x+1) i get 4x^2+x-3 ? b) factorise: 2x^2 + 13x + 15 c) find y-int, x-int and vertex of: y= x^2-3x-4 i get y-int = -4, but loose it from there :(
*Sunday, May 25, 2014 at 7:12am*

**math trig**

a 3.8m ladder rests against a vertical wall and makes an angle of 38 degrees with the wall. how far does the ladder reach up the wall?
*Sunday, May 25, 2014 at 6:58am*

**Math binomial formula and sequence**

a) use the binomial formula to find the 5th term of the expansion (2x - 3)^8 ------ i got 90720x? b) Find a_n, the general term for a geometric sequence, given that the fourth term, a_4 is 16 and the seventh term is -128 c) Find the sum of 8+12+16+20+24+.....to 15 terms thanks!
*Sunday, May 25, 2014 at 6:02am*

**Math - Ratio**

a) on a map the scale used is 1: 10,000. if two towns are separated by a straight 2.5 km road, what will be the distance between them on the map? b) on a map 2.5 km is represented as 0.5 cm. what scale is being used on the map? thanks heaps!
*Sunday, May 25, 2014 at 4:45am*

**math**

solve the equation for x. 3^2x - 3^x+2 +8 =0 Ps. The topic is logarithmic and exponential functions
*Sunday, May 25, 2014 at 3:50am*

**Math - Logarithms**

can someone pleaaase help me with these "solve for x": a) log_x 100 = 5 b) 3^x+5 = 81 c) log (4x + 2) - log 2 = log 6x thanks heaps!
*Sunday, May 25, 2014 at 3:28am*

**7th math**

If the actual figure is a rectangle that is 120 meters by 400 meters, what are the dimensions of a scale drawing in centimeters?
*Sunday, May 25, 2014 at 12:00am*

**Math**

When rolling a standard number cube twice, what is the probability of rolling two even numbers? I'm pretty sure the answer is 1/4, but the solutions says that this is wrong.
*Saturday, May 24, 2014 at 5:53pm*

**Math**

A ball is thrown 16 m into the air. The ball falls, rebounds to half its previous height, and falls again. If the ball continues to rebound and fall in this manner, find the total distance the ball travels until it hits the ground for the sixth time.
*Saturday, May 24, 2014 at 5:27pm*

**Math**

Marvin was supposed to make three payments of $2000 each—the first one year ago, the second one year from now, and the third three years from now. He missed the first payment and proposes to pay $3000 today and a second amount in two years. If money can earn 4.5% ...
*Saturday, May 24, 2014 at 5:03pm*

**Math **

An ordinary (fair) die is a cube with the numbers 1 through 6 on the sides (represented by painted spots). Imagine that such a die is rolled twice in succession and that the face values of the two rolls are added together. This sum is recorded as the outcome of a single trial ...
*Saturday, May 24, 2014 at 4:06pm*

**math**

if there are 45 pieces of fruit and there are twice as many bananas as there are apples. How many of each kind of fruit are there?
*Saturday, May 24, 2014 at 3:47pm*

**Math 1 question**

There are 35 marbles in a bag: 9 blue marbles, 8 green marbles, 4 red marbles, 8 white marbles, and 6 yellow marbles. Find P(red). Write the probability as a fraction in simplest form, a decimal, and a percent. four over thirty-one, 0.129, 12.9% four over thirty-five, 0.114, ...
*Saturday, May 24, 2014 at 2:04pm*

**math**

1/4 divide into a percentage
*Saturday, May 24, 2014 at 1:21pm*

**Math**

A G.p is such that the 3rd term is 9 times the first term, while the second term is 124 of the fifth. Find the fourth term
*Saturday, May 24, 2014 at 4:31am*

**Math - Linear Equations **

"the period of a pendulum, T (in seconds) varies directly with the square root of the length of the pendulum, L (in centimeters)". Given that a pendulum of length 9cm has a period of 0.63 seconds, find: a) The period of a pendulum of length 25cm b) The length of a ...
*Saturday, May 24, 2014 at 4:05am*

**Math**

Kelly's scores on the first three tests in her physics class are 79, 84, and 68. Determine all scores on the fourth test that will yield an average test score of at least 80.
*Saturday, May 24, 2014 at 1:40am*

**Math**

Identify the sequence as arithmetic. geometric, or neither.. explain your answer 1.6, 0.8, 0.4, 0.2....
*Friday, May 23, 2014 at 11:57pm*

**Math - Linear Equations **

"A trucking firm has 8 trucks, some carry a load of 10 tonnes and others carry a load of 5 tonnes. When all 8 trucks are carrying a full load, the total load is 70 tonnes." Develop and solve simultaneous equations to determine the number of trucks of each size that ...
*Friday, May 23, 2014 at 11:47pm*

**Math - Variation**

under certain conditions, the thrust T of a propeller varies jointly as the fourth power of it's diameter, d, and the square of the number, n, of revolutions per second. What happens to the thrust if n is doubled and d is halved?
*Friday, May 23, 2014 at 11:16pm*

**HELP MATH !!**

Melanie charges $4.50 per hour when she washes cars, plus $5.00 for supplies. Which function rule represents the amount y Melanie charges to wash cars for x hours? (1 point) a) y = 0.50x b) y = 4.50x + 5.00 c) y = 5.00x + 4.50 d) y = 9.50x The sale price of apples at a local ...
*Friday, May 23, 2014 at 10:48pm*

**math**

which table shows a proportional relationship? A)x=1,3,4,6 y=2,4,6,7 B)x=1,2,5,8 y=-2,0,6,12 C)x=2,3,5,6 y=-4,-6,-10-12 D)x=2,4,6,8 y=2,3,4,5 Is the answer C
*Friday, May 23, 2014 at 9:27pm*

**Math**

What are the solutions of the system? y = x2 + 3x – 4 y = 2x + 2 Don't understand
*Friday, May 23, 2014 at 9:23pm*

**Math**

What is the degree of the monomial? 6x^5
*Friday, May 23, 2014 at 9:21pm*

**math**

1. Mandy kept track of the trade-in value of a collector’s coin for several months through February of this year. She determined the line of best fit for the data was y = 4x + 12, where y is the trade-in value, in dollars, x months after February of this year. According ...
*Friday, May 23, 2014 at 9:10pm*

**math**

31. Solve the equation by completing the square. Round to the nearest hundredth if necessary. x2 – 6x = –8
*Friday, May 23, 2014 at 9:04pm*

**math**

use integer values of x from -3 to 3 to graph the equation y= {-X} Help me graph this by helping me with the coordinates.
*Friday, May 23, 2014 at 8:48pm*

**math**

what way would the line face with the linear equation y=-1/3x+5? A)A line going through the 5 up to the right B)A line going down from 5 c)A line going thru -5 and up D)A line going through positive 1 and to the left. Is it d
*Friday, May 23, 2014 at 8:42pm*

**Math**

20. The time t required to drive a certain distance varies inversely with the speed, r. If it takes 2 hours to drive the distance at 67 miles per hour, how long will it take to drive the same distance at 55 miles per hour? a. about 1.64 hours b. about 134.00 hours c. about 2....
*Friday, May 23, 2014 at 8:31pm*

**Math**

State the types of graphs that you could use to present each set of data below.Which type of graph do you think is most appropriate? Data
*Friday, May 23, 2014 at 8:27pm*

**Math**

What are the minimum, first quartile, median, third quartile, and maximum of the data set? 40, 7, 2, 35, 12, 23, 18, 28 Please help me.
*Friday, May 23, 2014 at 8:19pm*

**Math**

A confectioner perchased several boxes of candy for $6. He gave five boxes to his children, and sold the rest at 10 cents more per box than he had paid for them, and made a profit of 25% on his original cost. How much did a box of candy cost him?
*Friday, May 23, 2014 at 8:03pm*

**English 4 **

1. Which of the following displays a correct use of pronouns? A. Soung spent more money than me B. Jamal was as interested as her C. Claudia has always been better at math than I. 2. Read the following sentence and determine which sentence in each set of three is punctuated ...
*Friday, May 23, 2014 at 7:44pm*

**math**

Find the monthly payment for the loan. (Round your answer to the nearest cent.) $700 loan for 12 months at 12%
*Friday, May 23, 2014 at 6:37pm*

**math**

6. Kevin wants to calculate the value of the expression below. Which shows an equivalent way Kevin could write this expression? - 17 + 3 a) - (17 + 3) b) - (17 - 3) c) (- 3 + 17) d) ( - 3 - 17)
*Friday, May 23, 2014 at 6:34pm*

**Math**

2. A jar contains blue, red, yellow, and green marbles. P(blue)=1/4. What type of probability is illustrated and why? A. Experimental; the result is based on the number of possible outcomes. B. Experimental; the result is found by repeating an experiment. C. Theoretical; the ...
*Friday, May 23, 2014 at 6:23pm*

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