# Posts by liz

Total # Posts: 1,325

**physics **

1. The weight in the following diagram has a mass of 0.750 kg and the cart has a mass of 0.52 kg. There is a friction force of 2.1 N acting on the cart. What is the tension in the string? a. 4.4 N b. 4.3 N c. 4.1 N d. 4.2 N 2. An 8.5 kg block is attached to a weight. The ...

**Physics**

yes, there is a pulley between the weight and the block

**Physics**

1. The weight in the following diagram has a mass of 0.750 kg and the cart has a mass of 0.52 kg. There is a friction force of 2.1 N acting on the cart. What is the tension in the string? a. 4.4 N b. 4.3 N c. 4.1 N d. 4.2 N 2. An 8.5 kg block is attached to a weight. The ...

**physics**

A large truck with a mass of 3200 kg is pulling a trailer with a mass of 2400 kg. Both are accelerating at a rate of 0.45 m/s^2 . Determine the tension force between the truck and the trailer, and determine the force with which the truck is pulling. I'm not sure how to ...

**chemistry- morality **

To what volume should 1.19 ml of an 8.00 m acetic acid solution be diluted in order to obtain a final solution that is 1.50 M? show all work

**algerbra**

i did my question already but i was wondering if someone could double check my work. the question says to graph the following function on the grpah f(x)={|x|, -3 is equal to or less than x less than 2} {2x-8, x less than or equal to 2} i dont know if its possible to show a ...

**Math MS. SUE PLEASE HELP!!**

Rolinda’s first five Spanish test scores are 85, 85, 60, 62, and 59. a. Find the mean, the median, and the mode of Rolinda’s Spanish test scores. Round your answers to the nearest tenth, if necessary. b. Which of these measures best supports Rolinda’s claim that...

**Math MS. SUE PLEASE HELP!!**

Thank you sooo much fr answering so quickly!

**Math MS. SUE PLEASE HELP!! **

What is true of a random sample? A) it is the only way to sample a population. B)Each member of the sample is a volunteer. C) It is always the easiest way to sample a population. D) Each member of the population has an equal chance of being selected. MS. SUE PLEASE HELP!!

**Social studies**

Buffalo

**Math, Algebra**

A square and rectangle have the same area. The length of the rectangle is five inches more than twice the length of the side of the square. The width of the rectangle is 6 inches less than the side of the square. Find the length of the side of the square.

**algerbra**

am i correct on this? question: solve and check square of 5x+6 is equal to x work and answer: square each side 5x+6=x^2 subtract 5x-6 on both sides 0=x^2-5x-6 (x+1)(x-6) x+1=0 subtract -1 on each side x= -1 is a reject x-6=0 add 6 on each side x=6 and 6 was my answer and the ...

**algerbra**

could you please double check my work question:find the roots of the equation 2x^2+8x=12 by completing the square. leave answer in simplest radical form. work and answer: c=(b/2)^2 c(4/2)^2=4 2x^2 +8x=12 divide everything by 2 x^2 + 4x=6 x^2+4x+4=10 (x+2)(x+2) square root of (...

**careers**

i know right

**help Writeteacher**

help writeteacher

**careers**

When John asked Melanie to babysit Saturday night, he told her that he would pay $7 per hour. She accepted and did the work but has not yet received the money. What type of contract was this? a. implied contract b. unilateral contract c. bilateral contract d. sales contract I ...

**Physical Science**

Determine how long it will take given the scenario below (in time and in distance) to react to the car in front of you. Assume that the car in front of you takes 3 seconds to change speeds. Reaction time 1.6 seconds Speed: 75 mph Initial velocity: 33.53 Final velocity: 29.06 ...

**math (venn diagrams)**

70% of 7 graders have iPhone and 60%are in chorus. However, 15% of 7th graders are neither in chorus or own phone. What % of students have an iPhone and are not in chorus

**History**

Oh okay, never mind I can figure it out on my own. Thanks anyways

**History **

Which number labels Yasmin's native country of Spain? A 1 B 2 C 4 D 6 Which number labels Yasmin's current home in Sweden? A 1 B 3 C 4 D 5 (I am new also :))

**math**

4cos^2 x - cosx-3 =0 0 to 2pi SORRY TYPED THE QUESTION WRONG PLESSE HELP

**math**

nvm dont reply

**state & local government**

1. Why have the powers of the governor increased in modern times?

**geography**

New Zealand and Papua New Guinea have a. huge manufacturing industries. b. lush, tropical climates that produce many kinds of tropical fruit. c. valuable timber resources. d. very limited timber resources and poor soil.

**Physics**

A father and son were both pulling a red wagon at a magnitude of 61 lbs. at 139 degrees . The son pulled at a magnitude of 22 lbs. What was the magnitude of the fathers force ( component vector ?

**riddle**

moon

**Math**

It takes 2 hours to travel 30 miles by bike.how long will it take to travel 105 miles?

**trigonometry**

The angles of elevation to an airplane from two points A and B on level ground are 50? and 67? , respectively. The points A and B are 3.9 miles apart, and the airplane is east of both points in the same vertical plane. Find the altitude of the plane. Answer in units of miles. ...

**statistics**

A music industry researcher wants to estimate, with a 90% confidence level, the proportion of young urban people (ages 21 to 35 years) who go to at least 3 concerts a year. Previous studies show that 21% of those people (21 to 35 year olds) interviewed go to at least 3 ...

**Math**

The triangle in the trapezoid share a 15 inch base and a height of 10 inches. The area of the trapezoid is less than twice the area of the triangle. Find the values of X. X is greater than --- and x is less than 15 inches.

**lang. arts**

What is a catchy title for an essay about greed?

**Calc One**

44 gord with the top part

**Calc One**

The function C(m) = -.41m^2 + 6.7m - 44/ .7m represents Miles Traveled per lb. of CO 2 released as a function of speed(in MPH) for a hyundai Sontana. the domain of this function is [10,90]. A) calculate C'(m) B)find the critical points of C(m). C)Where does C(m) have ...

**algebra**

if sin alpha is 0.28° where 0° is less than or equal to alpha less than or equal to 90°, evaluate cos alpha, tan alpha, sec alpha, cosec alpha and cot alpha. please help, it's urgent.

**Chemistry**

The compound copper(II) nitrate is a strong electrolyte. Write the reaction when solid copper(II) nitrate is put into water:

**math**

uncle gives baby 25 dollars on her first birthday, 50dollars on second doubling act each year. I need help with an equation

**chemistry**

A solution contains a mixture of pentane and hexane at room temperature. The solution has a vapor pressure of 252 torr . Pure pentane and hexane have vapor pressures of 425 torr and 151 torr, respectively, at room temperature. What is the mole fraction of hexane? (Assume ideal...

**english**

Netta and Jim argued over their views of free trade. 2. Netta and Jim had different views on free trade. 3. Netta and Jim were sharply split over the issue of free trade. 4. Netta and Jim refused to discuss the issue of free trade. 16. In these four sentences, the word that&#...

**Math**

Compare the values of each of the digits 337 The 3 in the tens place is ---------the value of the 3 in the hundreds place.

**math**

A point P is 500m from the base of a pole. If the angle of elevation of the top of the pole to the point P is 40 degrees, find the height of the pole

**Chemistry**

2.42

**Maths - Year 10 - Simult. Equations**

50x + 20y = 310 x + y = 11 multiply bottom equation by 20 50x + 20y = 310 20x + 20y = 220 substitute into 1st equation via elimination 30x = 90 x = 90 ÷ 30 x = 3 solve for y 3 + y = 11 y = 11 - 3 y = 8 Answer: 3 50c pieces and 8 20c pieces

**Pre-Calculus**

Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists. Show your work. 4x - y + 3z = 12 x + 4y + 6z = -32 5x + 3y + 9z = 20 Please help me..

**Pre-Calculus**

That is exactly what I had for my answer but I was confused that I had an answer of 2 solutions.

**Pre-Calculus**

Solve the system by the substitution method. Show your work. 2y - x = 5 x2 + y2 - 25 = 0 I solved the problem but I got it wrong for some reason..can you solve it step by step?

**Pre-Calculus**

Locate the foci of the ellipse. Show your work. x^2/36+y^2/11=1 c^2=a^2-b^2 c^2=36-11 c^2=25 c= ± sqrt25 c= ±sqrt5*5 is this correct?

**Pre-Calculus**

Find the vertical asymptotes, if any, of the graph of the rational function. Show your work. f(x) = (x-4)/(x(x-4)) (x-4)/x(x-4) the common factors cancel out and all is left is f(x)= 1/x... how do I solve this problem?

**History**

I think its b or c

**History**

Which factor contributed most to Florida becoming a U.S. territory? a. the outcome of the Seminole Wars b. the weakening of Spain's hold over its colonial possessions c. the desire of Southern politicians to expand slavery into new territories d. the development of the ...

**Pre-Calc**

Find the vertical asymptotes, if any, of the graph of the rational function. Show your work. f(x) = (x-4)/(x(x-4)) How would I show my work? the x-4 cancel out and I am left with 1/x. The vertical asymp. is x= 0

**Pre-Calc**

For the data set shown by the table, a. Create a scatter plot for the data. (You do not need to submit the scatter plot) b. Use the scatter plot to determine whether an exponential function or a logarithmic function is the best choice for modeling the data. Number of Homes ...

**Pre-Calc**

thank you!

**Pre-Calc**

Verify the identity. Show your work. cot2x + csc2x = 2csc2x - 1 1+cosec^2x +cosec^2x Cot^2x+cosec^x= 1+2 cosec^2x Would this be correct?

**Math**

Solve the equation on the interval [0, 2π). tan2x sin x = tan2x would it be 0, pi/2 ?

**Math**

Solve the equation on the interval [0, 2π). cos x + 2 cos x sin x = 0 would the answer be 7pi/6 , 11pi/6 ?

**Math**

The pH of a solution ranges from 0 to 14. An acid has a pH less than 7. Pure water is neutral and has a pH of 7. The pH of a solution is given by pH = -logx where x represents the concentration of the hydrogen ions in the solution in moles per liter. Find the pH if the ...

**Math**

yup!

**Math**

In the formula d=rt d represents distance in miles, r represents average speed in miles per hour, and t represents time in hours.What is an automobiles average speed if it travels 60 in 1 1/2 hours?

**maths**

ken has 4 times as much money as Jake. if Jake gave Ken £360 he would still have more money than Ken. whats the least money Ken will have?

**Math**

A car dealer makes a 12% commission on every car sold. If the dealer sells a car for $10,000, how much does he make in commission?

**Math**

If 100 students are surveyed, about how many students own 2 or more pets? Explain please 0 pets __________ 1/20 1 pet __________ 1/2 2 0r more _______ 9/20 Thank you very much

**Biology**

How do I set up a trihybrid punnett square if the cross is TTRRPp x TtRrPp?

**History Help???**

I believe the answer is D

**cHEMISTRY**

What mass of AgCl(143.32g/mol) is formed from the reaction of a 0.109 M MgCl2 solution with excess AgC2H3O2?

**Math**

The total income amount is about 983 because 59 is 6% of 983.

**Geometry**

How would one solve similar right triangles if the first triangle has y and x as legs and a (altitude) as hypotenuse, and the second triangle has one leg of 50, the other is a, and the hypotenuse is 100. I solved for a, and it came out to be 86.6? Is this correct? How do I ...

**Calculus**

x=0, pi/3, 5pi/3

**Algebra**

The sum of measures of angle X and angle Y is 90. If the measure of angle X is 30 less than twice the measure of angle Y, what is the measure of angle X?

**Math**

got it thank you

**Math**

inverse laplace transform of {5/(s-4)^3}

**spanish**

Alyssa, did you ever figure it out? I don't see it in the lesson.

**business calc.**

The management of Ditton Industries has determined that the daily marginal revenue function associated with selling x units of their deluxe toaster ovens is given by the following where R '(x) is measured in dollars/unit. Rtext( )'\(x\) = -0.1x + 40 (a) Find the daily ...

**health information law and ethics**

Advance directives are defined by your readings as written instructions recognized under state law, such as living wills or durable powers of attorney for health care, that relate to the kind of health care the patient wishes to have or not have when incapacitated. Also know ...

**Math**

Lindsay has 10 inches of ribbon. She buys another three lengths of ribbon, each 5 inches long. How much ribbon does she have now?

**Chemistry**

wow, okay. Thank you!

**Chemistry**

Determine the number of grams of water in 7.00 g of copper(II) sulfate pentahydrate.

**Chemistry**

An experiment requires 0.34 M NH3(aq). The stockroom manager estimates that 15 L of the base is needed. What volume of 15 M NH3(aq) will be used to prepare this amount of 0.34 M base?

**Math**

Working together two people can cut a lawn of grass in 5 hours. One person can do the job alone in 1 hour less than the other. How long would it take the faster person to do the job?

**AP Statisics**

Joe scores 1770 on the SAT. Assuming that both tests measure the same thing, what score on the ACT is equivalent to Jose's SAT score? Explain.

**chemistry**

When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 14.4 g of carbon were burned in the presence of 55.2 g of oxygen, 16.8 g of oxygen remained unreacted. What mass of carbon dioxide was produced?

**Math**

193.75 miles

**public speaking**

when deciding on the topic, it is important to consider

**Chem**

Lead Silicon Iodine

**Math**

Describe a real-world problem that can be solved using the expression 29 divided by (3/8 + 5/6). Find the answer in the context of the situation. I know the answer is 24, however I cannot think of an expression to go along with this.

**Math**

Amy is building a house. The basement floor is at -15 feet. The roof of the house is above the ground 25 feet. Express the comparison of heights as an inequality. Explain the meaning of the inequality.

**Math**

Amy is building a house. The basement floor is at -15 feet. The roof of the house is above the ground 25 feet. Express the comparison of heights as an inequality. Explain the meaning of the inequality.

**Physics**

What will be the unit?

**Physics**

A force of 64 N is applied on a body producing an acceleration of 2.4 m/s^2. What is the mass of a body?

**Math**

Decompose 28*6 to make it easier below. Paula had a block of cream cheese that was 2 inches wide, 5 1/2 long and 1 1/2 inches tall. Paula used 1/2 of the cream cheese in her recipe. How many cubic inches of cream cheese did she use?

**math**

Which symbol is used to make -6? |-8| a true statement? A. > B. < C. = Is the answer B? Thank you

**Math**

Oops sorry thank you.😊

**Math**

Which set of integers are in the right order from least to greatest? A. -8,8,6,|-7|,5 B. |-7|,-8,8,6,5 C. -8,5,6,|-7|,8 D. 5,6,8,-8,|-7| Is the answer b? Thank you

**Chemistry**

Calculate the pH of a potassium phosphate buffer if the pKa of KH2PO4 is 7.2 and the acid-base ratio is 2:1 I took Chemistry 7 years ago and am in a review for a Biochem course I am takin. I do not remember the basics so any help with how to get started or what equations to ...

**Algebra**

I have a problem that reads as: -4x-2y=12 4x+8y=-24 And when solved the answer is (2,-2), but I checked the answer in the back and it says (6,-6) How does that WORK??

**Social studies.**

Thank you

**Social studies.**

The earliest type of trade was A. Bartering B. Currency C. Economies D. Cowry shell currency Is the answer A? Thank you

**Language Arts**

Identify the antecedent for the underlined pronoun in the sentence below. The boy was excited about his date with Sheila, but he didn't know how (it) would turn out. It is underlined A. boy B. date C. Sheila Is the answer B? Thank you

**Math**

What is the 11th term of the following geometric sequence? Enter a whole number 7/9,-7/3,7,-21,63

**stats**

1)Suppose that the weight of tomato juice in mechanically filled cans follows a normal distribution with a mean of 464 grams and a standard deviation of 8 grams. a)A random sample of size n = 18 cans is taken. Will the sampling distribution of the sample mean weight be normal...

**philosophy**

What is the notion “good” mean for Kant? How does this lead him to the categorical imperative (provide and fully explain at least two formulations)? Provide example(s) of your own regarding how one might use the categorical imperative to determine a course of action...