Thursday

December 8, 2016
Total # Posts: 103,168

**precalculus**

Can you check my answer? If it is wrong can you please explain why and give the correct answer? Use Gaussian elimination to write the system of equations given below in row-echelon form. 2x+4y+z=-4 2x-4y+6z=13 4x-2y+z=6 answer:2x+4y+z=-4 8y-5z=-17 z=1

*November 30, 2016*

**pre calculus**

can you check this question? An object moving vertically is at the given heights at the specified times. Find the position equation s = at^2 + v0t + s0 for the object given the following conditions. •At t = 1 seconds, s = 48 feet •At t = 2 seconds, s = 64 feet •...

*November 30, 2016*

**Calculus**

Consider the function f(x) = {0, x = 0 and 1 - x, 0 <= x <= 1}. Which of the following statements is false? a. f is differentiable on (0, 1). b. f(0) = f(1) c. f is continuous on [0,1] d. The derivative of f is never equal to zero on the interval (0,1). B and D are true...

*November 30, 2016*

**English**

I got it...sent it in all ready.It is C....We all ready know God sees all and knows all, so that is not what is being reveled. Kugler regrets not finding the money is being reveled. Thanks for your help. :)

*November 30, 2016*

**English**

If you had read The Last Judgement could you please help me? God...."The fifth and sixth people were an old married couple;he finished them off with an axe and found practically no money, although they had more than twent thousand hidden away." Kugler jumped up: ...

*November 30, 2016*

**Math**

Find all solutions of the equation cot(theta)+1=0 through the interval [0,2pie).

*November 30, 2016*

**precalculus **

please check my answers 1.Use Gaussian elimination to write the system of equations given below in row-echelon form. 2x+4y+z=-4 2x-4y+6z=13 4x-2y+z=6 answer:2x+4y+z=-4 8y-5z=-17 z=1 2.Find the solution to the system of equations given below. x+y+z=2 -x+3y+2z=8 4x+y=4 answer: 0...

*November 30, 2016*

**Calculus**

Which of the following functions does not satisfy the conditions of the Mean Value Theorem on the interval [-1, 1]? a. 5th root of x b. 2x arccosx c. x/(x - 3) d. sqrt(x + 1)

*November 30, 2016*

**Chemistry 1**

Which shows equilibrium between solute and solvent? I'm stumped. a. 2 M CaCl2 b. 1 g Na2CO3 & 100 mL H2O c. 2 mL methanol & 4 mL hexane d. 1 mL H2O & 3 mL ethanol

*November 30, 2016*

**Chemistry**

A 26.3 gram sample of solid potassium chlorate decomposed and produced 9.45 grams of oxygen gas. What is the percent yield of oxygen?

*November 30, 2016*

**pre calculus**

Use Gaussian elimination to write the system of equations given below in row-echelon form. 2x+4y+z=-4 2x-4y+6z=13 4x-2y+z=6

*November 30, 2016*

**precalculus**

Write the form of the partial fraction decomposition of the rational expression. 1/9x^2-4

*November 30, 2016*

**michelle**

An object moving vertically is at the given heights at the specified times. Find the position equation s = at2 + v0t + s0 for the object given the following conditions. • At t = 1 seconds, s = 48 feet • At t = 2 seconds, s = 64 feet • At t = 3 seconds, s = 48 feet

*November 30, 2016*

**consumers math**

Sam Sounds received a $290 discount loan to purchase a stereo. The loan was offered at 16% for 90 days. Find the interest in dollars and the proceeds for the following problem.

*November 30, 2016*

**Math **

I am an odd number I am less than 100 The sum of my digits is 12 What am I

*November 30, 2016*

**math**

Town P is on bearing 315 degree from town Q. While town R is south of town P and west of town Q. If town R is 60km away from Q, how fara is R from P?

*November 30, 2016*

**precalculus **

write the equation of the parabola y=ax^2+bx+c that passes through the points(0,3), (1,4), and (2,3)

*November 29, 2016*

**precalculus**

write the system of equations in row-echelon form 2x+4y+z=-4 2x-4y+6z=13 4x-2y+z=6

*November 29, 2016*

**precalculus**

how do you determine when a system of equations is written in row-echelon form?

*November 29, 2016*

**precalculus**

write the form of the partial fraction decomposition of the rational expresion. (x^2-x+2)/x(x-1)^2

*November 29, 2016*

**precalculus**

write the form of the partial fraction decomposition of the rational expression (2x-4)/(x^2-1)

*November 29, 2016*

**physics**

why you expect the temperature of water at the bottom of Niagara falls to be slightly higher than the temperature at the top of the falls. Why?

*November 29, 2016*

**Math**

The of stamps owned by Shirley, Mary and Daisy is in the ratio of 5: 6 7. The total number of stamps is 540. Mary gives so of her stamps to Shirley and 40 stamps to Daisy. Find the new ratio of their stamps.

*November 29, 2016*

**Math**

1. Use point-slope form to write the equation of a line that has a slope of 2/3 and passed through (-3,-1). Write your final equation in slope-intercept form. Is the answer y=2/3+-1 2. Write an equation of the line that passed through (2,-1) and is parallel to the graph of y= ...

*November 29, 2016*

**Math**

I have 2 questions that I need help with if someone could please help me step by step to figure out how to do this equation it would be very helpful. Thank you 1. Suppose y varies directly with x and, y=15 and x=5. Write a direct variation equation that relates x and y. What ...

*November 29, 2016*

**maths**

a) 11,250 mL b) $60

*November 29, 2016*

**Math**

Needs more information...

*November 29, 2016*

**Math**

1.125 hours or 9/8 hours

*November 29, 2016*

**American History**

In New England, the town is a major unit of local government. Except for a few major cities, each of the six states in the region is divided into towns. Each town generally includes all of the rural and the urban areas within its boundaries. Which best describes the ...

*November 29, 2016*

**social studies**

How were the lives of white people in the north and south alike and different? can someone help me please

*November 29, 2016*

**OPRE**

A producer is very proud of the peaches he grows. He claims that, on average, 10% or less of his peaches in a bushel are defective. You take a sample of 400 peaches and find that 50 are defective. If Î± = 0.025, what will be the decision?

*November 29, 2016*

**Math**

There are 24 students in mrs. garcia's class .she wants to divide the class evenly into groups of at least 4students .write ways in which she can divide the class

*November 29, 2016*

**pre calc**

Find all solutions to the equation 2 sin^2(?) ? sin(?) ? 1 = 0. Please explain throughly. Thank you so much :)

*November 29, 2016*

**Physics**

A 42-kg box slides down a frictionless inclined plane. The angle of the inclined plane is 34.0 degrees. The distance from the box to the bottom of the inclined plane is 3 m. Draw the free body diagram of the force vectors acting on the box. Determine: a. The weight of the box ...

*November 29, 2016*

**social studies**

At home on the hills of Vermont or in the woods of Maine or the Texan ranch comrade of Californians comrade of free north sweeteners of every hue caste am I of every rank and religion. Why did Whitman compose these lines? A. to point out the vastness of the United States B to ...

*November 29, 2016*

**Writing help**

I know how to write a thesis statement... I just need some examples of what I could use as the proposals for small businesses..

*November 29, 2016*

**Writing help**

This is a proposal also..

*November 29, 2016*

**Writing help**

I need ideas for a thesis statement with the topic of "Helping Small Businesses Succeed."

*November 29, 2016*

**social studies**

The answer for the second is d

*November 29, 2016*

**social studies**

At home on the hills of Vermont or in the woods of Maine or the Texan ranch comrade of Californians comrade of free north sweeteners of every hue caste am I of every rank and religion. Why did Whitman compose these lines? A. to point out the vastness of the United States B to ...

*November 29, 2016*

**math**

y+4=-2(x+6)

*November 29, 2016*

**social studies**

Thanks

*November 29, 2016*

**social studies**

We were worked in all weathers. It was never too hot or too cold it could never rain blow hail or snow too hard for us to work in the field. Work work work The longest days were short for him and the shortest nights too long for him. Which statements best paraphrases the view ...

*November 29, 2016*

**precalculus**

Write the form of the partial fraction decomposition of the rational expression. 2x-4/x^2-1

*November 29, 2016*

**pre calculus**

Use Gaussian elimination to write the system of equations given below in row-echelon form 2x+4y+z=-4 2x-4y+6z=13 4x-2y+z=6

*November 29, 2016*

**math volume**

Tommy decided to also make a sampler can with a diameter of 2 inches and a height of 3 inches. Tommy calculated that the area of the base was es002-1.jpg, and multiplied that by the height of 3 inches for a total volume of es002-2.jpg. Explain the error Tommy made when ...

*November 29, 2016*

**Latin**

how do you say we will love in Latin?

*November 29, 2016*

**Math**

A class of 12 students has taken an exam, and the mean of their scores is 71. One student takes the exam late, and scores 92. After including the new score, what is the mean score for all 13 exams?

*November 29, 2016*

**pre calculus**

solve 2x + y = 8 4x + 2y = 16

*November 29, 2016*

**PHYSICS**

A girl on a carousel has a centripetal acceleration of 21.3 m/s2. What is the acceleration of the girl if the carousel's angular velocity is doubled?

*November 29, 2016*

**precalculus**

solve 17-9x=18y 12y=11-6x

*November 29, 2016*

**precalculus **

how do you solve 2x + y = 8 4x + 2y = 16

*November 29, 2016*

**chemistry**

Find the volume of carbondioxide produced when 25grams ofCalcium carbonate was completely burnt

*November 29, 2016*

**chemistry**

Find the volume of carbondioxide produced when 25grams ofCalcium carbonate was completely burnt

*November 29, 2016*

**pre calculus**

Create systems of equations in two variables that have (a) no solution, (b) one distinct solution, and (c) infinite solutions. Show that each system has the indicated number of solutions by using a graph or solving the system.

*November 29, 2016*

**pre calculus **

Describe the advantages and disadvantages of The method of substitution”, “The method of graphing”, and “The method of elimination” of solving systems of equations

*November 29, 2016*

**precalculus **

Which of the following shows an inconsistent system of equations? ________________________________________ 4x - 2y = 10 ; y = 2x - 5 3x + 2y = 1 ; 2x - 3y = 1 2x + y = 2 ; y = -2x - 2 3x + 4y = 5 ; 6x + 8y = 10 Is 4x-2y=10 y=2x-5 the correct answer?

*November 29, 2016*

**precalculs**

how do you find all the solutions to the system of equations .2x^2-2x-y=14 .2x-y=-2

*November 29, 2016*

**precalculus **

how do you find all the solutions to the system of equations .x+y=0 .x^3-5x-y=0

*November 29, 2016*

**precalculus**

8. Solve the system of equations shown below. .3/4x-5/2y=-9 .-x+6y=28 x = 21.5, y = 8.25 x = -8, y = 6 x = 8, y = 6 x = -21.5, y = 8.25

*November 29, 2016*

**math**

ervin sells vintage cars. every three months, he manages to sell 13 cars. assuming he sells cars at a constant rate, what is the slope of the line that represents this relationship if time in months is along the x-axis and the number of cars sold is along the y-axis?

*November 28, 2016*

**Physics**

A gun is shot horizontally from a building that is 10 meters high at a velocity of 220 meters/ second: I need to know what Vx is and Vy along with answering Vx after 3 seconds Vy after 3 second. We were given these equations Vy= Vy0-9.8t y= y0+Vy0t-4.9t^2 x=Vxt ,but I'm ...

*November 28, 2016*

**math**

Suppose you want to build a house on the edge of a hill that overlooks a deep valley. what measures could you take to be sure your home will not have problems due to weathering or erosion?

*November 28, 2016*

**Math**

an at display includes two sound-effects speakers. They need to be positioned on the wall so that when you stand midway between the speakers, you are no closer than 7 feet to either speaker. each speaker should be the same distance from the corner. How far from the corner ...

*November 28, 2016*

**Math **

Write an equation in slope-intercept form of the line that passed through (-3,4) and (1,4). I think the answer is y=0/4x+4 Thank you

*November 28, 2016*

**probability**

Rolling a 5 on a fair number cube

*November 28, 2016*

**math**

11 is correct, I checked on a calculator.

*November 28, 2016*

**physics**

3.23x104J / 1.21x104 = 2.66

*November 28, 2016*

**Social Studies**

Thanks

*November 28, 2016*

**Social Studies**

Where can I find a good map of China from the california standards chapter 7 lesson 1-4?

*November 28, 2016*

**Algebra**

y= 3x + 13 2x= y -9

*November 28, 2016*

**Math word problems **

Sally has 108 muffins,which he needs to box up, 6 of which are blueberry, into dozens. How many boxes does he need

*November 28, 2016*

**Math**

How do I write 15 times 3.4 using the distributive property?

*November 28, 2016*

**World History**

How did the Shinto belief system develop in early Japan? A. Clans erected shrines to worship their ancestors. B. Buddhist ideas evolved into Shinto beliefs. C. Warriors built shrines to remember fallen comrades D. Clans honored powerful natural spirits and gods. Is the answer ...

*November 28, 2016*

**precalculus**

Which of the following would be the best first step when solving the following system using the substitution method? • x - y = -4 ; • x + 2y = 5 x = -4 - y x = -4 + y 2y = 5 - x 2y = 5 + x I have solved the equation but I am unsure which is the best first step. x-y=-...

*November 28, 2016*

**precalculus**

Which of the following would be the best first step for solving the system of equations by elimination? • 6.3x + 7.2y = 5.4 • 5.6x + 6.4y = 4.8

*November 28, 2016*

**pre calculus**

A small fast food restaurant invests $4000 to produce a new food item that will sell for $3.50. Each item can be produced for $2.15. How many items must be sold in order to break even? Round to the nearest item.

*November 28, 2016*

**precalculus**

A small fast food restaurant invests $4000 to produce a new food item that will sell for $3.50. Each item can be produced for $2.15. Which of the following systems shows the cost and revenue functions for x items produced and sold?

*November 28, 2016*

**Math**

First, divide 56 by 14.That will give you the cost per each bottle. Then you multiply that cost by 50, to find the cost of the 50 bottles.

*November 28, 2016*

**Math**

If the inverses of two functions are both functions, will the inverse of the sum or difference of the original functions also be a function? Explain your reasoning.

*November 28, 2016*

**Math**

How does one solve this? A= LxW ;w This is exactly how it was written and I heard your supposed divide something but I don't know...

*November 28, 2016*

**Physics**

A 27.9 kg block (m1) is on a horizontal surface, connected to a 6.50 kg block (m2) by a massless string as shown in the figure below. The frictionless pulley has a radius R = 0.090 m and a moment of inertia I=0.060 kgm2. A force F = 192.1 N acts on m1 at an angle theta = 32.1&...

*November 28, 2016*

**maths**

A boy throws a ball vertically upwards with a velocity of 10m/s.What is the velocity of the ball when it is half way up?

*November 28, 2016*

**Math**

Jasmine has taken a quiz she ks on question 16 and has completed 20% of the quiz. How many questions does the quiz have?

*November 27, 2016*

**math**

In a football game, a touchdown with an extra point is worth 7 points and a field goal is worth 3 points. Suppose that in a game the only scoring done by teams are touchdowns please help!!!!

*November 27, 2016*

**pre calculus**

Find all of the solutions of the equation x4-625i=0 and represent the solutions graphically. what is the next step to answer the question? (x^2-25?i)(x^2+25?i) (x-5?i)(x+5?i)(x-5?i i)(x+5?i i) i = 1 cis ?/2 ?i = ?1 cis ?/8

*November 27, 2016*

**precalculus**

use the information to solve the triangle. If two solutions exist, find both solutions can you show how to work this out? A=150°,b=4.8,a=9.4

*November 27, 2016*

**Environmental Science please help**

9 is false not true but I got a 9/10

*November 27, 2016*

**Environmental Science please help**

Number nine is wrong. It should be false

*November 27, 2016*

**math**

If 3 people worked and earned $5554.52 in one day. How much does each person earn if one worked for 5 hours, the other worked 7 and the other worked 8 hours?

*November 27, 2016*

**pre calculus **

How do you use de Moivre's formulas to find ?i?

*November 27, 2016*

**precalculus **

How do you convert <12,13> to polar form?

*November 27, 2016*

**precalcalculus**

use the information to solve the triangle. If two solutions exist, find both solutions. How do you work this out? 1.A=36°, B=98°, c=16 2.a=4,b=8,c=10 3.A=35°,b=8,c=12 4.A=25°,b=28,a=18 5.B=130°,c=10.1,b=5.2 6.A=150°,b=4.8,a=9.4

*November 27, 2016*

**precalculus**

how do you convert to polar form?

*November 27, 2016*

**Physics **

A brick of mass 2kg just begins to slide down an inclined plane at an angle of 45 degree with horizontal.what will be the force of friction

*November 27, 2016*

**Math**

find the velocity and direction of flight of a plane that is headed at 126 degrees with a ground speed of 215 mph in a 34 mi wind from south 36 degrees west

*November 27, 2016*

**science**

What is the average speed of a race cow that travels 60 meters in 20 seconds?

*November 26, 2016*

**Instructional Materials**

exam 026039RR

*November 26, 2016*

**Math**

A cooperation must appoint a president, CEO, COO,and a CFO. It must also appoint a planning committee with 3 different members. There are 15 candidates and officers can also serve on the planning committee. How many different ways can the officers be appointed? How many ways ...

*November 26, 2016*