Tuesday

October 21, 2014

October 21, 2014

Total # Posts: 833

**math**

the height of a ball thrown vertically upward from a rooftop is modelled by h(t)=-5t^2 +20t+50. Determine the maximum height of the ball.
*October 14, 2014*

**Physics**

Consider tension force on rope. When ball/cart is not moving, T = mbg. If ball swings to an angle theta, O, then the y-component of T is mbg cosO. The cart is also pulling on the crane of the rope with a Fapp that is opposite to the x-component of the T (mbg sinO). Newton'...
*October 12, 2014*

**Physics**

A cart of mass m (including the mass of the crane) has a pendulum hanging from a crane attached to the cart. There is no friction due to the normal force, u = 0, or wheel bearings of the cart wheels. The cart is experiencing and applied force to the left of 10N. The ball at ...
*October 12, 2014*

**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 .
*October 7, 2014*

**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.
*October 7, 2014*

**Physics**

Edit: Part 2 Find the angle of the third displacement.
*October 5, 2014*

**Physics**

A particle undergoes three displacements. The first has a magnitude of 15 m and makes an angle of 40 ◦ with the positive x axis. The second has a magnitude of 6.2 m and makes an angle of 158 ◦ with the positive x axis. After the third displacement the particle ...
*October 5, 2014*

**Math Help**

So the answer would be x = -10√1-y) + 2 or (96 + 4x - x^2)/100?
*October 4, 2014*

**Math Help**

Find the inverse of the following function algebraically. Show all work. f(x)=-5√-4x+4+2
*October 4, 2014*

**math**

Milk was purchased for $48.00. Due to the price increases, this was 2.3 times the cost of milk two years ago. What was the cost of milk two years ago?
*September 21, 2014*

**Pre-Calculus**

I'm kind of stuck on how to do this. Can someone help me? Thanks! Write the equation of the line with slope -2 that passes through the point (-1, -3) in slope-intercept form.
*September 14, 2014*

**math**

Which set of points are on the line y = 6x - 1? {(0, -1), (29, 5)} {(0, -1), (5, 29)} {(-1, 0), (29, 5)} {(-1, 0), (5, 29)}
*September 8, 2014*

**math**

Identify the solution(s) of the system of equations, if any. 6x + 4y = 0 y = 3 - 3x (–3, –2) (–3, 2) (–2, –3) (2, –3)
*September 8, 2014*

**math**

Simplify. (6x)2
*September 8, 2014*

**algerbra**

Identify the solution(s) of the system of equations, if any. 6x + 4y = 0 y = 3 - 3x (–3, –2) (–3, 2) (–2, –3) (2, –3)
*September 8, 2014*

**math**

Identify the solution(s) of the system of equations, if any. 6x + 4y = 0 y = 3 - 3x
*September 8, 2014*

**math**

Identify the solution(s) of the system of equations, if any. x + 3y = 7 6x - 9y = 6
*September 8, 2014*

**algerbra**

Identify the solution(s) of the system of equations, if any. -4x - 4y = 4 12y = -12x - 12 no solution (0, -1) (-1, 0) infinitely many solutions
*September 8, 2014*

**math**

Consider the following system of equations. y = 2x - 2 y - 2x = 7 What can you conclude about the system of equations? The system of equations is inconsistent. The system of equations is dependent. The system of equations is independent. none of these
*September 8, 2014*

**algerbra**

Which set of points are on the line y = 6x - 1? {(0, -1), (29, 5)} {(0, -1), (5, 29)} {(-1, 0), (29, 5)} {(-1, 0), (5, 29)}
*September 8, 2014*

**math**

A clothing store offers a 60% discount on all purchases. What is the discount in dollars (before tax) for an item originally costing $18.00 dollars?
*September 8, 2014*

**math**

the expression that is equivalent to -6(x - 6).
*September 8, 2014*

**algerbra**

The temperature on one day in January for Phoenix, AZ, is 56 degrees Fahrenheit. On the same day in Barrow, AK, the temperature is -31 degrees Fahrenheit. What is the difference between these two temperatures?
*September 8, 2014*

**Calculus**

Two points P and Q are connected by a straight road of length d. At time t = 0, a car starts driving from P to Q at a constant speed c. At t = 0, a bee starts flying from Q toward the car at a constant speed b > c, and takes a zig-zagging path, reversing direction each time...
*September 6, 2014*

**thank u**

thank u steve
*September 4, 2014*

**7th grade math**

identify a value of x for which sum of 3+x is positive
*September 3, 2014*

**7th grade math**

when x is nonzero integer the sum 0f 3+x is sometimes negative and sometimes positive. Identify a value of x for which the sum of 3+x is negative.
*September 3, 2014*

**math**

dentify the solution(s) of the system of equations, if any. 3x-2y=6 5x=5-25y
*September 1, 2014*

**algerbra**

Identify the solution(s) of the system of equations, if any. -3x-4y=2 8y=-6x-4
*September 1, 2014*

**algerbra**

Identify the solution(s) of the system of equations, if any. x=1 y=1
*September 1, 2014*

**algerbra**

Identify the solution(s) of the system of equations, if any. 3x+2y=4 5x-4y=3
*September 1, 2014*

**algerbra**

Identify the solution(s) of the system of equations, if any. -3x-4y=2 8=6x-4
*September 1, 2014*

**math**

At the school carnival, Carmen sold 3 times as many hot dogs as Shawn. The two of them sold 152 hot dogs altogether. How many hot dogs did Carmen sell?
*September 1, 2014*

**math**

Identify the solution(s) of the system of equations, if any. -2x - 4y = 8 8y = -4x - 16
*September 1, 2014*

**algerbra**

Consider the following system of equations. y = 4x - 4 y - 4x = 3 What can you conclude about the system of equations?
*September 1, 2014*

**algerbra**

A line passes through the points (-10,-4) and(-1,2) . What is the y-intercept of the line? a)(0,8/3) b)(8/3,0) c)(0,-4) d)(-4,0)
*August 25, 2014*

**algerbra**

Which of the following is an equation of a line that passes through the point (0, 5) and has a negative slope? y = 5x + 5 y = 5x y = -5x - 5 y = 5x - 5 y = -5x + 5
*August 25, 2014*

**algerbra**

thats not one of the answers
*August 25, 2014*

**algerbra**

A plumber charges customers $48 for each hour worked plus an additional $9 for travel. If h represents the number of hours worked, which of the following expressions could be used to calculate the plumber's total charge in dollars? 48 + (9 * h) 48 + 9 + h (48 * 9) + h 48...
*August 25, 2014*

**algerbra**

The temperature on one day in January for Phoenix, AZ, is 54 degrees Fahrenheit. On the same day in Barrow, AK, the temperature is -17 degrees Fahrenheit. What is the difference between these two temperatures?
*August 11, 2014*

**Management**

Which one of the following is a defensive strategy?
*July 28, 2014*

**Management**

When a manager performs symbolic duties as the head of an organization, that manager is called a
*July 28, 2014*

**Business**

in the u.s. economy,_____are considered the reward for risk of entering business.
*July 28, 2014*

**Physics**

A student is skateboarding down a ramp that is 8.33 m long and inclined at 24.5° with respect to the horizontal. The initial speed of the skateboarder at the top of the ramp is 4.12 m/s. Neglect friction and find the speed at the bottom of the ramp.
*July 8, 2014*

**math**

Suppose a football team's offense which passes 58% of the time (and rushes the rest), averages 6.9 yards per pass and 4.4 yards per rush. In a game with 65 offensive plays, how many yards would you expect them to gain
*June 28, 2014*

**Chemistry**

A balloon contains 0.350 mol of Ar at 5.00°C and 68.0 kPa pressure. What is the volume of the gas?
*June 23, 2014*

**chemistry**

Indicate which of the following quantum states are allowed and which are disallowed under the rules governing the electronic structure of atoms. n = 2, l = 1, ml = 0, ms = ½ n = 3, l = 3, ml = -2, ms = -½ n = 4, l = 3, ml = -2, ms = ½ n = 3, l = 2, ml = 2...
*June 22, 2014*

**English**

Skateboarding originated in Venice, California. the time was the mid-seventies. There was a drought. The swimming pools were empty. A)Skateboarding originated in Venice,California,there was a drought, swimming pools were empty,the time was the mid-seventies. it says combine ...
*June 13, 2014*

**English**

cumulative sentences or periodic pattern Periodic sentence Unable to eat dinner, do my homework, or get any sleep, I could think only of my mother's surgery the next morning Cumulative sentence All I could think about was of my mother's surgery the next morning, I was ...
*June 13, 2014*

**Cumulative sentences english**

Able to think only of my mother's surgery the next morning, I could not even eat my dinner, much less get any sleep, nor could I do my homework. My Answer First one is periodic sentence Unable to eat dinner, do my homework, or get any sleep, I could think only of my mother...
*June 13, 2014*

**English Sentence Clarity**

Sentence Clarity When in Florence, be sure to see the city's famed cathedral, and many tourists also visit Michelangelo's statue David. My answer Tourists when in Florence, be sure to see the city's famed cathedral and Michelangelo's statue David.
*June 11, 2014*

**maths**

3^n-1=2^n+1 how can i solve this problems, please help?
*May 28, 2014*

**Chemistry**

A truck has 5.9L diesel engine in it. 5.9L of the overall displacement in 6 cylinders each 102mm bore (diameter) and 120mm stroke (length). Engine operates at 16.3:1 compression ratio and with 6psi (0.41atm) of boost cruising at 1600rpm. 1.) The air mixture has an average ...
*May 5, 2014*

**Math**

Two vehicles are moving at a velocity of 100km/hr and 60km/hr the magnitude along the road is 500km and the vehicle with a vehicle with a velocity of 100km/hr began the journey 2.5 hrs ealier.CALCULATE the distance the vehicle with 60km/hr travelled to catch up the other
*May 3, 2014*

**math**

given a Gp below, find the values of m, and the next 2 terms: m, m+3, m^2+3
*May 1, 2014*

**math**

given a GP below, find the values of m, and the next 2 terms: m, m+3, m^2+3 Help me please
*May 1, 2014*

**math**

factorise 1-16(1-y)^2 please help me
*May 1, 2014*

**physics**

explain to me the process doping. what is it? how is it done?
*April 26, 2014*

**physics**

can you please explain how the process of doping is conducted.
*April 26, 2014*

**biology**

how can i construct a dichotomous key that can be used to identify the following: mango leaf, tridax procumbent leaf, cassia leaf, grass leaf, and cassava leaf.
*April 24, 2014*

**math**

i still have some problems
*April 23, 2014*

**math**

sweets are shared equally among 20 children at a party. if there were 1 more sweet and 1 more child, each child would get 1 sweet less. how sweets were shared at the party? thats how the question ends.
*April 23, 2014*

**math**

find the inverse of the function, f(x)=x-1
*April 23, 2014*

**math**

the first three terms of a GP are the first, fourth and tenth terms of an AP. given that the first term is 6 and that all the terms of a GP are different, find the common ratio.
*April 21, 2014*

**math**

which figure must have both parallel and perpendicular sides.
*April 10, 2014*

**math**

john ordered a new sign for her store. The sign has 4 sides . It also has 2 right angles. 1 acute angle , and 1 obtuse angle . What is the shape of the sign.
*April 10, 2014*

**math**

how many weeks in 3 years, explain your answer.show the work
*April 10, 2014*

**C++ Programming**

Create a class that holds robot warriors. Each has a string for their name, a number of hit points (an float), armor (a defensive modifier(an int)), and weaponry (an offensive multiplier(another int)). You will create 5 robots with a random number in each category (500 – ...
*April 7, 2014*

**Statistics**

. A 2003 Harris Poll of 993 randomly selected American adults found that 69% believed in capital punishment (death penalty). A sample size of 1010 American adults in 2000 found that 64% believed in capital punishment. Write the hypotheses for a significance test to determine ...
*March 29, 2014*

**Math**

-12i
*March 24, 2014*

**PRE-CALC**

c) .4
*March 24, 2014*

**statistics**

Smith is a weld inspector at a shipyard. He knows from keeping track of good and substandard welds that for the afternoon shift 5% of all welds done will be substandard. If Smith checks 300 of the 7500 welds completed that shift, what is the probability that he will find ...
*March 18, 2014*

**algebra**

9x+y=11
*March 14, 2014*

**Probability**

totally lost!!
*March 7, 2014*

**Physics 130**

A 20kg child slides down a long slide in a playground. She starts from rest at a height of 25m. When she is part way down the slide at a height of 10m, she is moving at 16m/s. Calculate the mechanical energy lost due to friction.
*February 25, 2014*

**math**

It tells you how many recieved a better than average grade so... 24/50= *100
*February 25, 2014*

**Physics 130**

Thank you so much!
*February 25, 2014*

**Physics 130**

can you explain the 20sin30?
*February 25, 2014*

**Physics 130**

It says nothing about friction, so assume its frictionless.
*February 25, 2014*

**Physics 130**

you push a 15kg cart with a force of 20N, 30 degrees below the horizontal. what is the normal force? Please help test tomorrow.
*February 25, 2014*

**physics**

A 2.5kg solid homogenous ball is rolling without slipping at 3.0 meters per second to the right on a level surface. The diameter of the ball is 80 centimeters. What is the total kinetic energy of the ball? Can someone give me the equation for this?
*February 24, 2014*

**Physics**

A 2.5kg solid homogenous ball is rolling without slipping at 3.0 meters per second to the right on a level surface. The diameter of the ball is 80 centimeters. What is the total kinetic energy of the ball? Can someone give me the equation for this?
*February 24, 2014*

**chemistry**

If 1.87 g of acetic acid(CH3CO2H) reacts with 2.31 g of isopentyl alcohol(C5H12O) to give 2.96 g of isopentyl acetate(C7H14O2), what is the percent yield of the reaction?
*February 23, 2014*

**Physics**

First start with an isothermal expansion at 2.0 atm from 1.0 L to 4.0 L. If this now is adiabatically compressed back to its original volume, what is the change in internal energy here? Also what are some examples of these processes?
*February 18, 2014*

**english**

romance
*February 4, 2014*

**physics**

sin inverse of .032
*January 28, 2014*

**physics**

Voltage=12V. R1=2.0ohms and R2=4.0ohms. Find the power used by R2.
*January 26, 2014*

**science**

A car of mass 1500 kg accelerates up a hill of incline 8 degrees, increasing its speed from 4 ms to 16 ms over a distance of 90m. Assuming a total frictional resistance of 1000 N, calculte: a) the tractive effort between the wheels and the road surface b)the work done during ...
*January 26, 2014*

**Physics**

Earlier I posted the tension question I knew how to get the equation of 50*9.81 = 2 (4360) sin A. I just don't know how to find (sin A) from here.
*January 20, 2014*

**physics**

The combined mass of a man and a chair suspended at the midpoint of a rope of negligible mass is 50 kilograms. The rope is connected to a weight of 4360 newtons hanging from a massless frictionless pulley. Find the angle.
*January 20, 2014*

**Physics -- URGENT**

Estimate the force a person must exert on a string attached to a 0.200 kg ball to make the ball revolve in a circle when the length of the string is 0.600 m. The ball makes 1.40 revolutions per second. Do not ignore the weight of the ball. In particular, find the magnitude of ...
*January 8, 2014*

**Physics AP**

A conical pendulum is formed by attaching a 50 g mass to a 1.2m string. The mass swings around a circle of radius 25cm. A claculate the speed of the mass. B Calculate the acceleration of the mass. C calculate the tension in the string
*December 19, 2013*

**grade 12 Functions**

A ferris wheel with a diameter of 60m rotates at a constant speed three times every 1.5pie minutes and reaches a maximum height of 62m from the ground. if you started the ride when it is at its highest point, on what internal of time would you be more than 58m above the ground...
*December 17, 2013*

**Physics Classical Mechanics**

A person of mass m2= 85.0 kg is standing on a rung, one third of the way up a ladder of length d= 4.0 m. The mass of the ladder is m1= 15.0 kg, uniformly distributed. The ladder is initially inclined at an angle θ= 40.0∘ with respect to the horizontal. Assume that ...
*December 12, 2013*

**math**

The bases of trapezoid ABCD are \overline{AB} and \overline{CD}. Let P be the intersection of diagonals \overline{AC} and \overline{BD}. If the areas of triangles ABP and CDP are 8 and 18, respectively, then find the area of trapezoid ABCD.
*December 8, 2013*

**Math**

An article in the local paper states that 30% of the students at Oak Grove Middle School earned a place on the Silver Honor Roll. If there are 920 students at Oak Grove, how many are on the Silver Honor Roll? USE A PERCENT RULER TO HELP YOU DECIDE. SHOW ALL YOUR WORK... I DONT...
*October 30, 2013*

**physics**

A stone is dropped off a cliff, the last 1.5 seconds before it reaches the ground it travels 30 meters. Find the height from which it dropped & final velocity
*October 7, 2013*

**science of speed and acceleration **

You are traveling at a speed of 42 miles in .75 hours and slow to a speed of 42 miles in 1.25 hours. What is your rate of deceleration?
*September 24, 2013*

**science**

You are traveling at a speed of 42 miles in .75 hr and slow to a speed of 42 miles in 1.25 hr. What is your rate of declaration?
*September 24, 2013*

**College Algebra**

If a ball dropped from the top of a 400 ft building to hit the ground, how long would it take in seconds?
*September 8, 2013*

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