Sunday

February 19, 2017
Total # Posts: 942

**Trigonometry**

Given that cos(3x)=acos^3(x)−bcos(x) is a trigonometric identity, what is the value of a+b

*April 23, 2013*

**Trigonometry**

Given that cos(3x)=acos^x−bcosx is a trigonometric identity, what is the value of a+b ?

*April 23, 2013*

**Trigonometry**

If sinx−cosx=1/2 then cot^2 (2x)=a/ b, where a and b are coprime positive integers. What is the value of a+b ?

*April 23, 2013*

**Numbers**

How many positive integers less than or equal to 1000 are common multiples of the three numbers 8,100, and 40

*April 23, 2013*

**Logarithms**

if loga(b)=1/48 what is the value of logb(a^2) ?

*April 22, 2013*

**calculus**

If x=t^3 and y=3t^5, where t is any real number, what is the derivative of y with respect to x at x=125 ?

*April 20, 2013*

**Algebra**

If the sum of 3 non-zero distinct real numbers a, b and c is 2 , and the two sets {a,b,c} and {1/a ,1/b ,1/c} are the same, what is the value of a^2 +b^2 +c^2 ?

*April 20, 2013*

**Trigonometry**

Given that tan84=T , how many solutions are there to tanx=T in the domain [0,1000] ?

*April 19, 2013*

**Trigonometry**

Let O be the origin and P be a point in the fourth quadrant on the x-y plane. Let 270<z<360 be the angle formed by OP with the positive x-axis. Similarly Q is a point in the fourth quadrant on the x-y plane where |OQ|=|OP| and the angle formed by OQ and the x-axis is 7z...

*April 19, 2013*

**Algebra**

Let S be the sum of all values of r such that the coefficient of the x^2 term in the expansion of (x−3)(rx+2)^3 is −6 . If S=a/b, where a and b are coprime positive integers, what is the value of a+b

*April 19, 2013*

**P&P**

Peter is walking from the library to school at a rate of 40 meters per minute. At the same time, Paul is walking from school to the library. After they meet each other, Peter still needs 6 minutes to get to school, while Paul is 200 meters away from the library. What is the ...

*April 19, 2013*

**Ratios**

If the ratio of x+y to x−y is 279/262 , then the ratio of y to x can be written as a/b where a and b are coprime positive integers. Find a+b

*April 19, 2013*

**Numbers**

What is the smallest possible natural number x>5 , that leaves a remainder of 5 whenever it is divided by 14 , 8 or 77

*April 19, 2013*

**Maths**

There are two complex roots to the quadratic equation z^2 +(1−16i)z+(−80+10i)=0 . What is the value of the larger of the two norms of the two roots?

*April 19, 2013*

**Math**

Find the sum of all primes q<1000 such that for some prime p<q , both q divides p^3 -1 and p divides q^3 -1

*April 19, 2013*

**Calculus**

p'(53) = (-.009)(20.6)e^(-.009(53)) = -.1854e^((-.477) = -.1854 * .62064 = -.115067 = -.115067 * 100 = -11.5067 % change in relocation rate

*April 9, 2013*

**physics**

A string of 15 identical Christmas tree lights are connected in series to a 127 V source. The string dissipates 58 W.What is the equivalent resistance of the light string? Answer in units of Ω

*April 8, 2013*

**physics**

A string of 15 identical Christmas tree lights are connected in series to a 127 V source. The string dissipates 58 W.What is the equivalent resistance of the light string? Answer in units of Ω

*April 8, 2013*

**Please help science**

Most organisms reproduce: Sexually Asexually By meiosis Is it asexually or sexually not sure I think it is asexually though

*April 8, 2013*

**Science**

Most organisms reproduce: A. Sexual B. asexual C. By meiosis Is it b not sure between b and a

*April 8, 2013*

**Science**

Most microrganisms reproduce: A. Sexually B. asexually C. By meiosis A or B not sure

*April 8, 2013*

**Math**

A study determines that 60% of the voters in a town intend to vote for the incumbent mayor. If a sample of 8 people is selected, using the binomial formula, what is the approximate probability that 6 of the 8 people surveyed intend to vote for the incumbent? A. 0.47 B. 1.28 C...

*April 6, 2013*

**maths**

perpendicular avenue is perpendicular to tangent street and passes through D(17,8).find its equation

*March 29, 2013*

**English**

The a in the word saving sounds like A. Ape B. pat C. Heated D. Naughty Is it a

*March 26, 2013*

**statistics**

I did not change names I have two children in college and they had different questions ask before you blame

*March 17, 2013*

**statistics**

The average age of a vehicle registered in the United States is 8 years, or 96 months. Assume the standard deviation is 16 months. If a random sample of a group of 48 vehicles is selected find the probability that the mean of the group’s age is between 90 and 100 months.

*March 17, 2013*

**statistics**

The amount that airlines speed on food per passenger is normally distributed with means $8.00 and standard deviation $2.00. What is the probability that a randomly selected airline spends more than $12.50?

*March 17, 2013*

**Program Logic Design**

The Chocolate Delights Candy Company needs to add the following functionality to its cash register: When a customer is checking out, the cash register needs to store the required data pertaining to each item the customer is buying. This data includes the item name, the price ...

*March 13, 2013*

**Quantum Physics**

Alice and Bob share a state a| + +> + b |- -> , where the first qubit is Alice's and the second qubit is Bob's. Alice measures her qubit in the standard basis and sends the measurement outcome to Bob. If Bob wants his qubit to end up in the state a |0> + b |1&...

*March 12, 2013*

**Calculus**

Evaluate [double intergal (R xy dA)] , where R is the region bounded by x^2 +y^2 <=16 , x>=0 and y>=0

*March 12, 2013*

**Integrals**

Evaluate è R xy dA , where R is the region bounded by x^2 +y^2 <=16 , x>=0 and y>=0

*March 12, 2013*

**Geometry**

ABC is a triangle with area equal to 20 . The incircle of triangle ABC has radius equal to 2 and the circumcircle of triangle ABC has radius equal to 6 . If sinA+sinB+sinC=a/b , where a and b are coprime positive integers, what is the value of a+b ?

*March 11, 2013*

**Geometry**

ƒ¡ is a circle with center O . A and B are points on ƒ¡ such that the sector AOB has perimeter 40 . What is the measure of ÚAOB (in radians) when the area of the sector AOB is maximized

*March 11, 2013*

**Trigonometry**

Let è be the angle between the x-axis and the line connecting the origin O(0,0) and the point P(−3,−4) , where 180<è<270. Given that sinè+cosè+tanè=−a/b, where a and b are coprime positive integers. What is the value ...

*March 11, 2013*

**MEchanics M-1 (Velovity time graphs)**

A dragonfly, at rest on a bullrush, decides to fly to a second bullrush 18 m away. It accelerates uniformly to a speed of. 5 m s-1, then immediately decelerates uniformly to rest on the second bulrish. Howlong the journey took?

*March 9, 2013*

**Physics**

We use a wrench to turn nuts on bolts because they require less force. Consider a hexagonal nut 1 cm in diameter. We can tighten this nut with one of two wrenches, wrench A with lever arm 10 cm and wrench B with lever arm 20 cm. Both wrenches have a very small mass, so you may...

*March 6, 2013*

**Trigonometry**

Let S be the sum of all the possible values of sin x that satisfy the following equation: 5-2cos^2(x)-7sin(x) = 0 S can be written as a/b, where a and b are coprime positive integers. What is the value of a + b?

*March 6, 2013*

**Calculus**

The location of a dot P at a given time t in the x-y plane is given by (x,y) = (t - sin t, 1 - cos t). What is the distance traveled by P in the interval 0 <= t <= 2pi

*March 6, 2013*

**algera 1A**

I thought the formula i was suppose to use is y2-y1 x2-x1 which equals to (-15,- -11)and(-20,- -2) Then I got -4/-18 which equals to -2/-9

*March 5, 2013*

**algera 1A**

find the slope, if it exists,of the line containing the pair of the points. (-2,-11) and (-20,-15). I came up with (-2,-9)is this correct?

*March 5, 2013*

**algebra 1A**

correction the pair are (-2,-11) and (-20,-15).

*March 5, 2013*

**algebra 1A**

find the slope, if it exists,of the line containing the pair of the points. (-2,-1) and (-20,-15).

*March 5, 2013*

**fractions**

stupid and thanks you a******

*February 26, 2013*

**Math**

a+p =5 p 11/4 >a

*February 24, 2013*

**Math**

2k+7=5k-k

*February 19, 2013*

**Math**

2k+7=5k-k

*February 19, 2013*

**Physics**

In order to measure the length of a long flourescent ceiling lamp, a student makes a very small hole in a piece of paper, holds the paper above the floor, measures the distance between the hole and the floor, and finally measures the length of the light's image on the ...

*February 16, 2013*

**Help please edu.**

Young children with autism: A. Will never talk B. relate to people differently than typical children do C. get along better with older children D. like changes in their routine I think B am I correct

*February 14, 2013*

**Phsics**

What is the terminal speed for an 77.0kg skier going down a 44.0 degrees snow-covered slope on wooden skis uk= 0.060? Assume that the skier is 1.70m tall and 0.300m wide.

*February 14, 2013*

**Algebra 1- Math**

The sum of a smaller number and twice a larger number is 67. If the smaller number is increased by 5, the sum will equal the larger number. Find the numbers. A rectangles width is four more than twice its length. Its perimeter is 62. Find the dimension of the rectangle?

*February 6, 2013*

**Algebra 1- Math**

how do u solve 3x=y-5

*February 6, 2013*

**Algebra 1- Math**

what has the same slope but different y-intercept?

*February 6, 2013*

**Math**

Now-Next minus a negative 2

*February 5, 2013*

**Algebra 1- Math**

Can anyone please show me and explain how to solve 9x+2=3y? Thanks,Bye.

*February 5, 2013*

**Physics**

6.7²/(2g) + 9.1 = 11.39 m b) t = 2√[2H/g] = 3.05 sec; X = 6.6*t = 20.125 m c) Vf = (6.6i - 6.7j) m/s d) Θ = arctan[j/i] = arctan[-6.7/6.6] = -45.43°

*February 5, 2013*

**science**

The Sun.

*February 5, 2013*

**physics**

acceleration = force / mass A = 500/ 2000 a = 0.25 m/s/s

*February 5, 2013*

**physics**

calculate the acceleration of a 2000-kg single air plane just before takeoff when the thrust of its engine is 500 N

*February 5, 2013*

**physics**

A compact car, mass 875 kg, moving south at 16 m/s, is struck by a full-sized car, mass 1660 kg, moving east at 12 m/s. The two cars stick together, and momentum is conserved in the collision. The wreck skids along the ground and comes to a stop. The coefficient of kinetic ...

*February 4, 2013*

**chemistry**

1.00 g zinc and 0.80 g sulfur are allowed to react all the zinc is used up 1.50 g of zinc sulfide is formed and some unreacted sulfur remains what is the mass of unreacted sulfur

*February 3, 2013*

**Help please**

Number the items to show the most effective and the least effective to use to scratch the mineral to test its hardness. Use number 1 for the most effective and the 4 for the least efective. Chalk(1) Fingernail(2) Steel screw(4) Paper clip(3) Am I correct????

*January 28, 2013*

**Help please**

According to the textbook,an individual's most. Important decision that will effect the climate is: a. The choice to unplug an extra freezer that is rarely used b. looking for the energy star on new appliances c. Selecting a fuel efficient automobile d. Planting a tree I ...

*January 18, 2013*

**math**

if jay eats 1/3 of jelly beans and jack 1/4 of the jelly bean leveing bill with 10 jelly bean how many were there to start with

*January 18, 2013*

**Probability PLEASE CHECK**

What is the probability of a game being sold if 18,980,000 of that title was sold out of a total 68320,000 different video games Is it 19,989,000/68320,000 1890/6832 = 27.77% rounded to nearest tenth

*January 9, 2013*

**Math-truth table, please check my work!**

p -> ~q , p -> q Are these Equivalent statements? This is my try. Please let me know if these truth tables are correct. p -> ~q p q p -> ~q p q p -> q T T T T T T T F T T F F F T F F T F F F T F F T The statements are not equivalent.

*January 9, 2013*

**Cosmology**

Mass-energy curves space-time

*January 8, 2013*

**Cosmology**

Using large spectroscopic redshift surveys

*January 8, 2013*

**Math-Syllogism valid?**

Some snakes are poisonous. A rattlesnake is a snake. Therefore: a rattlesnake is poisonous. Is syllogism valid or invalid?

*January 8, 2013*

**math-Tiling a room**

How much does it cost to tile a room that is 420 sqft if the tiles used are 1 foot on a side and cost $0.95?

*January 8, 2013*

**statistics-expected value**

100 raffle tickets are sold for $3 with one grand prize of $200. Julie purchased one ticket. What is the expected value of her ticket? What is the fair value of a ticket?

*January 8, 2013*

**math**

100 raffle tickets are sold for $3 with one grand prize of $200. Julie purchased one ticket. What is her expectation? What is the fair value of a ticket?

*January 8, 2013*

**math**

4y X 4y = 16y squared

*January 8, 2013*

**math - expected value and fair price**

one hundred raffle tickets are sold for $3 each. one prize of $200 is to be rewarded.Lisa purchases one ticket. a- what is her expected value b- what is the fair price for a ticket?

*January 7, 2013*

**Statistic- Average**

A mean average of 60 on 6 exams is needed to pass a course. on his first 5 exams, Adam received grades of 46,73,73,63 and 70. If the lowest grade of the exams already taken is to be dropped, what grade must he receive on his last exam to get a C in the Course?

*January 7, 2013*

**solve for x with inequality**

(387-46)+x/6=> or = to 70 (341)+x = or > than 70

*January 7, 2013*

**algebra**

(387-46)+x/6=> or = to 70

*January 7, 2013*

**statistics**

A license plate is to have 3 digits followed by 2 uppercase letters. What is the number of different license plates possible if repetition of numbers and letters is not permitted?

*January 7, 2013*

**statistics-?mean average with lowest number out?**

A mean average of 60 on 7 exams is needed to pass a course. on his first 6 exams, Adam received grades of 46,74,70,59,66 and 72. if his lowest grade of the exams already taken is to be dropped,what grade must he receive on his last exam to pass?

*January 7, 2013*

**statistics-?mean average with lowest number out?**

A mean average of 60 on 7 exams is needed to pass a course. on his first 6 exams, Adam received grades of 46,74,70,59,66 and 72. if his lowest grade of the exams already taken is to be dropped,what grade must he receive on his last exam to pass?

*January 7, 2013*

**math**

A mean average of 60 on 7 exams is needed to pass a course. on his first 6 exams, Adam received grades of 46,74,70,59,66 and 72. if his lowest grade of the exams already taken is to be dropped,what grade must he receive on his last exam to pass?

*January 7, 2013*

**math**

how many different committees can be formed from 6 teachers and 31 students if the committee consists of 4 teachers and 4 students?

*January 7, 2013*

**English I Speech**

Can anyone tell me 3 reasons why fracking is either good or bad and 3 supporting details? Please, thank you It's urgent

*December 24, 2012*

**English I Speech**

Can anyone please share their idea of a strong, powerful hook, background information and thesis about fracking? Please this urgent. Be quick like your life depends on it.

*December 24, 2012*

**Algebra 1- Math**

At the ocean's surface the pressure is 1 atmosphere. At 66 feet below seal level, the pressure is 3 atmosphere. The Relationship between the pressure and the depth is linear. a. find the independent and dependent variable. b. create 2 ordered pairs. c. find the slope. d. ...

*December 14, 2012*

**Algebra 1- Math**

A software company started with 2 employees. In 6 months, the company had 14 employees. The number of employees increased at a steady rate. a. create 2 ordered pairs. b. find the slope. c. Interpret the meaning of the slope. d. Find the prediction equation.

*December 14, 2012*

**wireless communications**

what is the period of the space shuttle traveling at 250km above the earth and what is its velocity

*December 2, 2012*

**7th grade social studies Ms. Sue please**

that is cool Ms. Sue because I am in 7th grade.

*November 29, 2012*

**Fractions**

Solve by drawing a diagram. A Tour bus travels 7 1/2 mi south, 3 1/2 east, 4 1/3 mi north, and 11 1/2 mi west. How far has the tour bus traveled when it crosses its own path?

*November 14, 2012*

**Math**

40.15

*November 13, 2012*

**geography**

thank you for your help:)

*November 8, 2012*

**geography**

the list i gave you

*November 8, 2012*

**geography**

i need to know what influences they had

*November 8, 2012*

**geography**

i need to know the influences they had

*November 8, 2012*

**geography**

Central asia Complete the following: Describe what influence the former invaders of this region brought into the regions culture. a. Turkic b. Arabs c. Mongols under Genghis Khan D. Mongols under Timur e. Russians f. Soviet

*November 8, 2012*

**geography**

in Centrel Asia why are temperatures in this region often really cool at night, but sweitering hot during the days?

*November 8, 2012*

**science**

Calculate the heat of combustion of this wax in kJ/mol. How much energy is produced per carbon? What is the limiting reagent? I have the Q=m*C*deltaT equation to be 10460.45 joules using 100.1 grams C25H52, 25 degrees C, and 4.18 J/gC. I don't know how to find how much ...

*November 7, 2012*

**Math,Statistics**

Johnny suffers from Flu an average of 5 times per week. However, Tony claims that Johnny rarely suffers from fewer than 15 bouts flu per week. If Johnny has been suffering from flu for 180 weeks, at a minimum, how many of those weeks has he suffered from fewer ￼￼...

*November 3, 2012*

**Computers**

The answer is one that you must learn for yourself my friend...

*October 24, 2012*

**Information Technology**

The answer is one that you must learn for yourself my friend...

*October 23, 2012*