Friday

January 20, 2017
Total # Posts: 164

**Math**

How do I prove that sec? - tan?sin? = cos? So far I have LS 1/cos? - sin?/cos? (sin?) =1/cos? -sin^2/cos?

*January 19, 2017*

**To: Writeacher or any other english helper**

I had posted a question earlier about my essay but have received no help? is there no one who can help me? If you haven't seen the movie or read the book then i understand but please help if you can, really appreciated:)

*November 9, 2016*

**English**

I must write an essay based on the following question: compare the role of christy smith in helping Larry regain his memory in Somewhere in the night with the role of Margaret in helping Chris regain his memory in the return of the soldier. My thoughts are that both margaret ...

*November 9, 2016*

**Language Arts**

1. Which of the following is not part of the rising action in "Raymond's Run"? (1 point) A. Squeaky and Raymond confront Mary Louise and her friends on Broadway. B. Mr. Pearson hints to Squeaky that she should consider letting the new girl win. C. Squeaky is ...

*September 15, 2016*

**Math**

A mall charges 25pesos for the first hour or a fraction of an hour as parking fee. An additional 25pesos is charged for every additional hour, or a fraction of an hour of parking. The parking area operates from 7A.M. to 12 midnight every day. a. Write a function rule for the ...

*June 30, 2016*

**Physics**

When an 8-lb rifle is fired, the 0.02-lb bullet receives an acceleration of 10^5 ft/s^2 while it is the barrel? (a) How much force acts on the bullet? (b) Does any force act on the rifle? If so, how much and in what direction? (c) The bullet is accelerated for 0.007 s. How ...

*June 22, 2016*

**Math**

Sam is 9 years older than angel. Six years from now, Sam age will be thrice the age of angel 3 years ago. Find their present ages. Please help me with this. ASAP. Thanks

*March 2, 2016*

**Math**

Thank you Dylan :*

*March 2, 2016*

**Math**

a 40 years old mother has a 10 years old daughter. In how many years will the mother be twice as her daughter? Please help me with this. ASAP. Thanks

*March 2, 2016*

**Math**

The temperature starts at 70 degrees and drops by 1/10 every 2 minutes. What would the temperature be after 6 mins

*February 23, 2016*

**Math**

the explanatory variable would be X the square footage of a house which is .0686 and the response variable would be Y the asking price in thousands of the house which is 83.24 . I am confused on how to figure out the rest of the problem.

*December 17, 2015*

**Math**

x=square footage of a house y=asking price in thousands of the house. x goes from 1200 square feet to 1500 square feet. the regression equation is y^= .0686x+83.24 A. what are the explanatory and response variables? B. Interpret the slope. C. Is it reasonable to interpret the ...

*December 17, 2015*

**Math**

I got that but i am not sure how to do the bottom part. when i use normal approximation to commute it i get 0%

*December 16, 2015*

**Math**

There is a 100 question multiple choice test each with 5 choices. You randomly guess each question. Set up the binomial probability formula to find the probability of getting exactly 80 correct out of 100. Check to see if you can use the normal approximation to binomial ...

*December 16, 2015*

**Statistics**

Suppose a college entrance exam has a mean of 1200 and a standard deviation of 100. An Ivy league college will only take applicants in the 90% percentile or higher. what is the lowest score they would need on the entrance exam?

*December 16, 2015*

**St. Isaac Jogues Catholic School**

The ratio of cats to dogs at a pet show is 1:3,what percent of the pets at the show are cats?

*November 9, 2015*

**Algebra**

Twice a number increased by 28

*September 16, 2015*

**maths**

Cos square 30 degree cos square 45 degree + 4 sec square 60 degree + 1/2 cos square 90 degree - 2 tan square 60 degree

*June 1, 2015*

**physics**

A rectangular loop with a=2.9 cm, and b=1.9 cm, moving with a velocity v=3.8 cm/s into an area where the magnetic field is uniform, pointing into the page, and whose magnitude is B= 450 mT. a) What is in volts the induced emf in the loop when the loop is moving in a region ...

*February 28, 2015*

**physics**

Yes, I found the force to be 8.64x10^-19, but the speed I can not figure out.

*February 20, 2015*

**physics**

The magnetic field of the Earth is 0.50 x 10-4 T in a certain location. a) What will be in Newtons the force on a completely ionized carbon atom (Z = 6, A = 12) traveling with the solar wind with a velocity of 18.00 x 103 m/s perpendicular to the magnetic field? b) How fast ...

*February 20, 2015*

**physics**

A square bar with a mass of 0.830 kg and 19.3cm long (l) rests on two parallel horizontal rails that are 18.0cm apart (d) and 120.0cm long (L) as shown in the figure. (By horizontal it is meant that the rails lie in a plane perpendicular to the local gravitational field.) The ...

*February 20, 2015*

**math**

The distance between -2 and 4 on the number line can be found by which expression?

*January 23, 2015*

**statics/physics**

The uniform 10-kg ladder in the figure rests against the smooth wall at B, and the end A rests on the rough horizontal plane for which the coefficient of static friction is 0.3. determine the angle of inclination of the ladder and the normal reaction at b if the ladder is on ...

*December 8, 2014*

**Trigonometry**

If the set is 25ft, and angle A is 22.5 degrees, the travel is how many ft?

*November 3, 2014*

**Rational Functions Word Problem**

A car travels at a constant speed and burns g(x) litres of gas per kilometer, where x is the speed of the car in kilometers per hour and g(x) = 1280 + x^2/320x a) If gas costs $1.29 per litre, find the cost function C(x) that expresses the cost of the fuel for a 200 km trip as...

*October 6, 2014*

**Engineering**

Oh okay, that makes sense. thank you!

*September 6, 2014*

**Engineering**

A box with an open top is to be made from a square piece of cardboard by cutting equal squares from the corners and turning up the sides. If the piece of cardboard measures 12 in on the side, find the size of the squares that must be cut out to yield the maximum volume of the ...

*September 6, 2014*

**college algebra**

to group some terms that is difficult to solve,then,when we group that terms they will be easy to solve.

*September 1, 2014*

**French**

it's et

*April 10, 2014*

**French**

Verbes: avoir et être Mets les phrases suivantes au passé composé. 1. Nous avons faim. 2. Il y a un visiteur dans la classe 3. As-tu de la chance?

*April 10, 2014*

**social studies**

Killjoy is correct. I got 7/7, thanks.

*February 27, 2014*

**Science**

Use the Particle Theory of matter to explain what viscosity in and why temperature affects viscosity.

*February 2, 2014*

**Science**

The terms diffusion and osmosis seem to have similar meanings. Explain how they are similar. Then give reason why scientists use two separate term.

*January 7, 2014*

**physical science**

A person has a mass of 50.0 kg. what is the pressure they exert on the blades of their ice skates if each skate blade is 15.0 cm long and 5.00 mm wide?

*September 26, 2013*

**science**

An astronaut on a space walk bumps the shuttle and starts moving away at a velocity of 0.02m/s. The astronauts mass is 100kg. He has takes a 1kg "safety week" and shoves it away in exactly the direction of his motion at a speed of 6m/s. What speed does the astronaut ...

*September 26, 2013*

**science**

an astronaut on a space walk bumps the shuttle and starts moving away at a velocity of 0.02m/s. The astronauts mass is 100kg. He has takesa 1kr "safety week" and shoves it away in exactly the direction of his motion at a speed of 6m/s. what speed does the astronaut ...

*September 25, 2013*

**science**

a man loads 1,000 sacks of flour into a truck in 30.0 minutes. Each sack has a mass of 20.0kg and the man must lift each sack 1.00m from the cart up onto the truck bed. how much power did the man develop.

*September 25, 2013*

**science**

an object who's mass 5.20kg has a gravitational potential energy of 10.3kj. how high above the ground is the object?

*September 25, 2013*

**Physics**

A hot-air balloon is descending at a rate of 1.7 m/s when a passenger drops a camera. If the camera is 44 m above the ground when it is dropped, how long does it take for the camera to reach the ground?

*May 28, 2013*

**Chemistry**

i got d.

*March 14, 2013*

**Chemistry**

Which of the following processes is exothermic? a.rolling a ball up a hill b.boiling water in a beaker to make steam c.allowing meat to thaw after taking it out of the freezer d.reacting hydrogen and oxygen gases to make water e.a popsicle melting on a warm summer day

*March 14, 2013*

**math-calculus**

The following equation shows the approximate relationship between the percentage y of total personal consumption spent on food and the corresponding percentage x spent on education. y = 38/x^0.38 percentage points; (6.5 ≤ x ≤ 17.5). According to the model, spending...

*December 20, 2012*

**Math Calculus**

The number of portable CD players you are prepared to supply to a retail outlet every week is given by the formula: q = 0.1p2 + 2p where p is the price it offers you. The retail outlet is currently offering you $50 per CD player. If the price it offers decreases at a rate of $...

*December 17, 2012*

**Chemistry**

how many grams of hydrogen occupy 40 ml at 300.15 K and 710 torr?

*October 22, 2012*

**Chemistry**

A sample of benzoic acid contaminated with NaCl and sand is to be recrystallized: Benzoid Acid: Solubility in water at 100 degrees Celsius in g/100 mL = 6.8, at 0 degrees Celsius in g/100 mL = 0.2. NaCl: Solubility in water at 100 degrees Celsius in g/100 mL = 39.1, at 0 ...

*October 21, 2012*

**Physics**

1/[T]3

*September 2, 2012*

**Math**

The probability that Aaron sees Hannah on any given day is 1/2. What is the probability that he sees her 3 out of all 5 days this week?

*July 31, 2012*

**Advanced Algebra**

Express the infinite series below using sigma notation and then find the sum. 64 + 40 + 25 + 15.625... Any explanation would be excellent. Thank you so much.

*April 30, 2012*

**Math**

If an object is launched straight up into the air from a starting height of h_{0} feet, then the height of the object after t seconds is approximately h=-16t^2+v_{0}t+h_{0} feet, where v_{0} is the initial velocity of the object. Find the starting height and initial velocity ...

*April 8, 2012*

**Applied Calculus**

If an object is launched straight up into the air from a starting height of h_{0} feet, then the height of the object after t seconds is approximately h=-16t^2+v_{0}t+h_{0} feet, where v_{0} is the initial velocity of the object. Find the starting height and initial velocity ...

*April 8, 2012*

**Applied Calculus**

If an object is launched straight up into the air from a starting height of h_{0} feet, then the height of the object after t seconds is approximately h=-16t^2+v_{0}t+h_{0} feet, where v_{0} is the initial velocity of the object. Find the starting height and initial velocity ...

*April 8, 2012*

**Applied Calculus**

Thank you, I got a very similar trying to do it the way our homework assignments were done. But your way seems much simpler. I got 25.8198898 by 30.76923077. C=3x+3x+5y =6x+5y xy=800 y=800/x c(x)=6x+5(800/x) =6x+4000/x c'(x)=6-4000/x^2 Find the critical value 6-4000/x^2=0 ...

*April 8, 2012*

**Applied Calculus**

A hardware store owner chooses to enclose an 800 square foot rectangular area in front of her store so that one of the sides of the store will be used as one of the four sides of the fence. If the two sides that come out from the store front cost $3 per running foot for ...

*April 8, 2012*

**Applied Calculus**

An underground electricity cable is to be laid between two boat docks on opposite banks of a river. One boat dock is 600 feet downstream from the other. The river is 200 feet wide. If the cost of laying the cable is $50 per foot under water and $30 per foot on land, how should...

*April 8, 2012*

**Calculus**

Okay, so im not understanding how you went from V'(x)=(12-2x)²+2x(12-2x)(-2) to V'(x)=12(x²-8)... ive done this problem many times and am stuck on this part. i always end up with V'(x)= 12x²-96x+144 => 12(x²-8x+12) so i end up with x=2 and x=...

*March 8, 2012*

**physics**

A man with a mass of 62 kg skis down a frictionless hill that is h = 3.3 m high. At the bottom of the hill the terrain levels out. As the man reaches the horizontal section, he grabs a 20-kg backpack and skis off a 2.0-m-high ledge. At what horizontal distance from the edge of...

*March 1, 2012*

**physics**

A man with a mass of 62 kg skis down a frictionless hill that is h = 3.3 m high. At the bottom of the hill the terrain levels out. As the man reaches the horizontal section, he grabs a 20-kg backpack and skis off a 2.0-m-high ledge. At what horizontal distance from the edge of...

*March 1, 2012*

**math**

In Triangle ABC, AC = BC and mC = 62°. The longest side of the triangle is: AC BC AB AM

*January 16, 2012*

**Math**

In Triangle ABC, AC = BC and mC = 62°. The longest side of the triangle is: AC BC AB AM

*January 16, 2012*

**calculus**

Find the center of mass of the region bounded by the curve y = x3 - 4x2 +3x ; the x-axis ; x = 0 ; x = 1

*December 1, 2011*

**University of Phoenix**

How do I write a 150- to 200-word paragraph to explain the importance of purpose, audience, tone, and content in academic writing

*November 27, 2011*

**Algebra**

Thank you

*November 14, 2011*

**Algebra**

I have two questions-- 1.What is the population of a town after 6 years if it is increasing annually by 3.5%. The population is at 6,000 people right now. I did6000x(1+0.035)^6 = 7375.53 or 7376 people 2. The value of car is 28,000 dollars. If car depreciate at 20% per year, ...

*November 14, 2011*

**algebra**

also Ms. Sue thanks for your help with that other problem!

*September 29, 2011*

**algebra**

"Tanya's age is ten years greater than half Aarons age. If the sum of their ages is 55, how old is Tanya?" can who ever solves this explain how to do it too???

*September 29, 2011*

**algebra**

can anyone at least explain the question??

*September 29, 2011*

**algebra**

I don't know why i don't understand this stuff. its just so frustrating!

*September 29, 2011*

**algebra**

no that's where i've been getting stuck :(

*September 29, 2011*

**algebra**

Ms. Sue thanks a ton for solveing my last problem. But now I have another one. Can you help??? "Tanya's age is ten years greater than half Aarons age. If the sum of their ages is 55, how old is Tanya? also do you think you could explain how to do this so I can do it to?

*September 29, 2011*

**algebra**

thank you!

*September 29, 2011*

**algebra**

The length of a certain rectangle is 4 m greater than five times it's width. What are the dimensions of the rectangle if its perimeter is 20m??? please help i have no idea how to do this!

*September 29, 2011*

**Math**

i know u included the couples sitting side by side but still

*September 29, 2011*

**Math**

uhhhhhhhh are you sure cause that doesn't sound posible. especialy if the couples have to sit side by side

*September 29, 2011*

**Math**

if the couples have to sit side by side then i count 32

*September 29, 2011*

**Math**

I count 64 posibilitys: p=person s=seat p ssssssss p ssssssss p ssssssss p ssssssss p ssssssss p ssssssss p ssssssss p ssssssss

*September 29, 2011*

**4th grade math**

352 958 first add the 2 and 8 and get 10 and put the 10 to the side for later. then add the 50's. you will get 100 add the ten to this and get 110 and put it to the side. then add the 300 to the 900. you will get 1200. add the 110 to this. you will end up with 1310

*September 29, 2011*

**ENGLISH RIDDLE**

im guessing love but it could also be hate

*September 29, 2011*

**ENGLISH RIDDLE**

i have to agree. that post made my eyes hurt

*September 29, 2011*

**Math**

Determine whether or not the function is one-to-one. 1. f(x) = 2x - 7 2. f(x) =(11x − 5)

*August 31, 2011*

**math**

Form the composites of the following two functions. f(x)=x2 +7x--4 and g(x)=3x--12 5. (f g)(x) 6. (g g)(x) thanks!

*August 31, 2011*

**Math**

Perform the indicated operations with the following two functions. f(x)=x2 +7x-4 and g(x)=3x-12 3. f(x) + g(x) 4. f(x), g(x)≠ 0 g(x) thanks for the help!

*August 31, 2011*

**Algebra**

4(r-6)+1>5(r+3)-25 the solution set is ?

*August 1, 2011*

**Financial Accounting**

ane Doe of Creative Marketing was recording transactions into the accounting records to prepare financial statements for the bank in a loan application. Her expenses were higher than anticipated and she was concerned about the effects on net income. As she was recording $3,000...

*July 18, 2011*

**Life orientation**

5 ways in which poverty impacts on the environment

*May 2, 2011*

**Chemistry**

Element X has two natural isotopes:X-6 (6.015amu) and X-7 (7.016amu). calculate the atomic mass of element X given the abundance of X-7 is 92.5%. a)12.5amu b)6.50amu c)6.09amu d)6.52amu e)6.94amu

*March 6, 2011*

**Math**

Write the equation of the line satisfying the given condition. Perpendicular to x = 4 and passing through the point (7, 2)

*February 15, 2011*

**physics**

*is given by E=(3000i-600j) N/C the question doesnt include whether x or y is perpendicular to the places

*January 26, 2011*

**physics**

At some instant the velocity components of an electron moving between two charged parallel plates are vx = 1.5 × 105 m/s and vy = 3.0 × 103 m/s. Suppose the electric field between the plates is given by In unit-vector notation, what are (a) the electron's ...

*January 26, 2011*

**algebra**

Given the function G(v)=5v+7, find each of the following, G(2)=, G(-7)=, G(6.5)=

*January 23, 2011*

**MATH**

what is 881/5 as a mixed number

*January 18, 2011*

**math**

I STILL DON'T UNDERSTAND CAN YOU BREAK IT DOWN

*January 18, 2011*

**math**

15 1/2 divided by 3 4/7 =

*January 18, 2011*

**math**

I mean 881/5

*January 18, 2011*

**math**

what is 881/1 as a mixed number

*January 18, 2011*

**trigonometry**

80

*December 5, 2010*

**Geography**

Can you suggest some legends stories for South Sumatra?

*November 25, 2010*

**Physics**

I understand the basics of the center of mass, but I'm having a hard time with this wire one: "A uniform piece of wire, 20 cm long, is bent in the center to give it an L-shape. How far from the bend is the center of mass?" If you could help that'd be great. ...

*November 22, 2010*

**PHYSICAL SCIENCE**

WHAT IS THE KINETIC ENERGY OF A BALL WITH THE MASS OF 5KG ROLLING AT 10M/S

*November 2, 2010*