# Libby

Most popular questions and responses by Libby-
## math

You and your friend are selling tickets to a charity event. You sell 7 adult tickets and 16 student tickets for $120. Your friend sells 13 adult tickets and 9 student tickets for $140. What is the cost of a student ticket?

*asked on March 29, 2016* -
## Social Studies ASAP PLZ

1. Which of the following is the largest ethnic group in China? A. Han ** B. Tibetan C. Uighurs D. Hui 2. How is Xiao most like other Chinese people? A. He has only one brother B. He has chosen to live at home ** C. He works at a factory D. He is an

*asked on March 19, 2018* -
## Math

If triangle MNO is congruent to triangle PQR, which of the following can you NOT conclude as being true? A. line NO congruent to QR B. angle N is congruent to angle Q C. line MN is congruent to PR D. angle M is congruent to angle P

*asked on March 9, 2014* -
## Math

Find the circumcenter of angle EFG with E(4,4), F(4,2), and G (8,2).

*asked on March 10, 2014* -
## physics

A proper lifetime of a certain particle is 100.0ns. a) How long does it live in the lab frame if it moves at V=0.960c? b) How far does it travel in the lab during that time? c) What is the distance travelled in the lab frame according to an observer moving

*asked on March 10, 2011* -
## Geometry

What translation rule can be used to describe the result of the composition of T(X,Y) and T (X,Y)? A. T(X,Y) B. T(X,Y) C. T(X,Y) D. T(X,Y)

*asked on March 27, 2014* -
## Chemistry

6.00 g of hemoglobin was dissolved in 250.0 mL of solution. The resulting osmotic pressure was 6.80 mmHg at 23.0C. what is the molar mass of hemoglobin?

*asked on June 10, 2018* -
## chemistry 2

CaCl2, NaCl, and sugar derived from beet juice are all commonly used in winter to melt ice on streets. At the same molality, which of these would be most effective at this task and why?

*asked on June 7, 2018* -
## general chemistry II

a solution of a metal ion has a molar absorptivity (E) of 75M^-1 at 450 nm. a 10mL sample of this solution was withdrawn and diluted to 250mL. from this diluted solution, a 5 mL sample was withdrawn and diluted to 100 mL. the absorbance of the final

*asked on June 6, 2018* -
## Enthalpy Chemistry

Can someone make sure I did this write! What is the molar change in enthalpy when 100 g of ice is heated from -18.2 C to -72 C (Cp = 37.4 J/K*mol) 100g of ice = 100 g/-18.2 C = 5.56 mol 5.56 mol * 37.4 J/K * mol * 53.8 K = 1118 J

*asked on June 7, 2010* -
## chemistry

How many moles of carbon are needed to react with 5.01 mol SO2? How many moles of carbon monoxide form at the same time that 0.255 mol CS2 forms? How many moles of SO2 are required to make 125 mol CS2?

*asked on March 31, 2010* -
## Math/Pre-Algebra

Philip is going on a 4000-kilometer road trip with three friends. The car consumes 6 liters of gas per 100 kilometers and gas costs $1.50 per liter. If Philip and his friends want to split the cost of gas evenly, how much should they each pay?

*asked on December 16, 2018* -
## science

A 6.90 kg penguin runs onto a huge sheet of frictionless Arctic ice. At t=0 it is at x=0 and y=0 with an initial velocity of 0.47 m/s along the positive x-axis. It slides while being pushed by the wind with a force of 0.49 N directed along the positive

*asked on September 15, 2011* -
## physics

A proper lifetime of a certain particle is 100.0ns. a) How long does it live in the lab frame if it moves at V=0.960c? b) How far does it travel in the lab during that time? c) What is the distance travelled in the lab frame according to an observer moving

*asked on March 10, 2011* -
## Math

in triangle PQR, PQ=5.4, QR=3.6, and PR=6.2. to the nearest tenth, what is m

*asked on March 27, 2014* -
## Chemistry and I think some physics

Check my answers! This site needs a preview post option! And thanks for checking! 1. Classify each of the following pure substances as an element or a compound. A) carbon B) baking soda C) nickel D) gold My answers: A) element B) compound C) element D)

*asked on February 1, 2007* -
## Math 221

A chess club with 55 members is electing a new president. Ali received 33 votes. What percentage of the club members voted for Ali?

*asked on July 6, 2014* -
## Math

If a an b are nonzero constant, simplify {√3 a sin (pi/b)}^2 + {√3 a cos (pi/b)}^2

*asked on May 13, 2014* -
## chemistry

An ideal gas is contained in a cylinder with a volume of 5.0 102 mL at a temperature of 30.°C and a pressure of 710. torr. The gas is then compressed to a volume of 27 mL, and the temperature is raised to 800.°C. What is the new pressure of the gas?

*asked on April 29, 2010* -
## Fiance

If you take out an $8,400 car loan that calls for 36 monthly payments starting after 1 month at an APR of 9%, what is your monthly payment?

*asked on March 14, 2015* -
## ALGEBRA I

Last spring Steve joined a health club. The club charges a one-time enrollment fee of $150.00 plus a $25.00 monthly fee. Let n represent the number of months Steve pays for membership. Which of the following best represents the domain of the situation?

*asked on February 15, 2018* -
## distributive property

5x+5y rewrite the expression as a product using parentheses

*asked on November 21, 2011* -
## math

The atmospheric pressure P in pounds per square inch (psi) is given by P = 14.7 e−0.21 awhere a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 11.11 psi, what is its altitude? (Recall that 1 mi = 5,280 ft.

*asked on November 23, 2014* -
## Math

Use a translation rule to describe the translation of triangle ABC that is 8 units to the right and 2 units down.

*asked on March 26, 2014* -
## Math 221

How do simplify 0.05(0.3m + 35n) – 0.8(-0.09n – 22m)

*asked on July 6, 2014* -
## algebra

The perimeter of a rectangular painting is 354 centimeters. If the width of the painting is 79 centimeters, what is its length?

*asked on July 4, 2014* -
## Chemistry II: equilibrium and thermodynamics

Ca(OH)2 dissolves exothermically in water and the molar solubility of Ca(OH)2 decreases as the temperature increases. What are the signs of delta H and delta S for dissolving Ca(OH)2?

*asked on July 18, 2018* -
## organic chemistry

is an α,β-Unsaturated ester CH2=CHCO2Et more or less reactive than an CH2=CHOEt in electrophilic addition and where do the two slot into the reactivity order of CH2=CH2 < CH2=CHMe < CH2=CHBr i think CH2=CHOEt is more reactive than the Br equivalent but

*asked on February 20, 2010* -
## Help with History

name 5–7 important events from Chinese, Mongolian, or Taiwanese history.

*asked on March 18, 2018* -
## Literature

12. When does the Narrative of Sojourner Truth take place? A. Before the Civil War* B. Right after the Emancipation Proclamation C. After the Civil War D. During the Civil War I think I got the answer - can you double check for me? Thanks!

*asked on May 11, 2015* -
## chemistry

An ideal gas is contained in a cylinder with a volume of 5.0 102 mL at a temperature of 30.°C and a pressure of 710. torr. The gas is then compressed to a volume of 27 mL, and the temperature is raised to 800.°C. What is the new pressure of the gas?

*asked on April 29, 2010* -
## trig

Find all values of [theta] in the interval 0°

*asked on May 23, 2010* -
## Math

The perimeter of a rectangular painting is 354 centimeters. If the width of the painting is centimeters, what is its length?

*asked on July 4, 2014* -
## Algebra

I want to know if this is correct. the question is: Marissa, Cassidy, and Shante went to a school party. Marissa brought 2 bags of Skittles, and Cassidy brought 3 bags of Skittles. Shante forgot to bring candy to the party. Each bag contained the same

*asked on April 29, 2008* -
## Math

How many times greater is the value of the digit in 1 in 183,607 than the value of the digit in 1 in 362,105, can someone help

*asked on February 3, 2016* -
## math

An oil-drilling company knows that it costs $25,000 to sink a test well. If oil is hit, the income for the drilling company will be $405,000. If only natural gas is hit, the income will be $125,000. If nothing is hit, there will be no income. If the

*asked on December 2, 2014* -
## Algebra

Two trains start from the same place at the same time. They travel i~ opposite directions. One averages 60 miles per hour and the other averages 80 miles per hour. After how long will they be 420 miles apart?

*asked on April 2, 2012* -
## chemistry

How many moles of chlorine are needed to react with 3.30 moles of aluminum?

*asked on March 31, 2010* -
## math

Can someone explain the Triangle Similarity, Or the AA Similarity, Theorem? We're doing proofs, and I don't think I understood the wording.

*asked on April 15, 2009* -
## Algebra 1

using a constant rate, you can saw a log into 3 pieces in 12 minutes. At the sam constant rate, how long will it take you to cut a siliar log (if the same size) into 6 pieces? would you do a rate formula or what? I'm really stuck on this one!

*asked on May 20, 2008* -
## Algebra 1

Your uncle buys a new car that comes with seven new tires, one for each wheel, and three spares. He decides to be economical by using the three spares as much as the other four. If he drives 22, 750 miles and each tire has been used equally, what will be

*asked on May 7, 2008* -
## physics

An incident X-ray photon of wavelength 0.2800nm is scattered from an electron that is initially at rest. The photon is scattered at an angle of 180.0degrees and has a wavelength of 0.2849nm. Use the conservation of linear momentum to find the momentum

*asked on April 29, 2008* -
## Math

My 3 digit number has 4 in the hundreds place.It has a greater digit in the tens place than in ones place.The sum of the digits is 6.What is my number?

*asked on October 23, 2018* -
## math

Tarot cards are used for telling fortunes, and in a reading, the arrangement of the cards is as important as the cards themselves. How many different readings are possible if five cards are selected from a set of nine Tarot cards?

*asked on November 30, 2014* -
## Math 221

How do I simplify 2w – 3 + 3(w – 4) – 5(w – 6)

*asked on July 6, 2014* -
## Math 221

How do I simplify 2a(a-5)+4(a-5)

*asked on July 6, 2014* -
## Law

, list two pros and two cons of Uniform Crime Report (UCR) data and two pros and two cons of self-report data.

*asked on July 7, 2011* -
## Algebra 1

a girl that was 4 and a half feet tall was standing next to a telephone pole. at one 'o clock, her shadow was 8 ft. long, and the pole's was (i think) 36 ft. long, how tall was the pole? this is from memory, since i forgot to bring the paper home. but i

*asked on May 15, 2008* -
## math

estimate a range for the sum of 4.987, 28.27, 0.098

*asked on October 21, 2018* -
## Math 221

2 5 - / - 9 12 /-means divided by What is the simplest form?

*asked on July 6, 2014* -
## Math 221

2 5 - / - 9 12 / is divided by

*asked on July 6, 2014* -
## Math

An isosceles triangle has an area A, an apex angle 2 theta, and a height of h. Determine an expression for theta in terms of A and h.

*asked on May 28, 2014* -
## math

Original Question is: how many 1/2 miles are in 12 miles? write the division question 12 divided by 1/2= 24 what multiplication question could the model also answer? 12 x 2 =24 This is the one I didn't understand Write the question given as a

*asked on December 10, 2013* -
## math

5 CUPS EQUAL HOW MANY PINTS (x1pt/2c) I thought 10?

*asked on November 24, 2013* -
## Algebra

If a trend line has equation y = -2x + 5, what type of association would you expect the data to have?

*asked on November 25, 2012* -
## Math

How many different arrangements of seven letters can you make if you have seven distinct letters

*asked on September 13, 2012* -
## algebra

As you are leaving the community, you notice another new community just down the street. Because you are in the area, you decide to inquire about it. a. The sales representative here tells you they also have two floor plans available, but they only have 38

*asked on June 21, 2011* -
## Science

Express your answer as a balanced net ionic equation. Identify all of the phases in your answer

*asked on February 28, 2011* -
## Algebra

there are 3 corners in a triangle. one is 44 degrees, another is 4x degrees, and the other is (2x+16) degrees. find the value of x

*asked on August 18, 2010* -
## math

for ax^2 + bx + c with gradient 4x + 2 and a stationary value of 1 find a b and c and nature of point i think that its a minima and that its 2x^2 + 2x +2 but im not sure can someone check this please

*asked on February 28, 2010* -
## chemistry/physics Urgent!!

how do i calculate the substrate concentration needed relative to Km to produce a rate relative to Vmax which is 0.1 x Vmax ?? I think i need to manipulate the michaelis menton eq but when i do it im left with [s] in the amount please help lib

*asked on February 25, 2010* -
## Algebra 1

It takes a lot of snow ofr the federal government in Washington D.C. to shut down, but even they experienced a two-hour delay last Friday. This is to allow people to take it slow in thier way to work. A commute to work that usually takes someone 24 minutes

*asked on February 7, 2008* -
## Algebra

Solve the equation using the Quadratic Formula 5xsquared+13x-6=0 i think it is -2/5,3 5x^2 + 13x -6 (5x -2)(x +3)=0 You are correct. From Bob Pursley's work you can see that his solution gives +2/5 and not -2/5. The +2/5 is correct. drbob is right on that.

*asked on December 14, 2006* -
## Algebra

suppose a,b,c and d are different positive integers whose sum is 100, and a-c=5. what is the greatest possible value of ab-cd?

*asked on September 1, 2016* -
## math

Judy has 3/4 yards of yarn. For each scarf she makes, she needs 1/2 yards of yarn. Does she have enough fabric to make 2 scarfs? I say no because 3/4 divided by 1/2 = 1 1/2 am I right

*asked on December 18, 2013* -
## math

There is a winter storm and the snow is falling at a rate of 4 inches/hour. Write 3 equivalent ratios associated with the following rate 4/inches/hour. How many inches will fall between 8pm and 12pm? I haven't a clue

*asked on November 24, 2013* -
## Math

WHAT WOULD 18/100 BE IN RATIO FORM, I THINKING 18:100 BUT NOT SURE?

*asked on November 23, 2013* -
## science please help

Also why don't we accept the Metric System as it in now used in other countries?

*asked on September 30, 2013* -
## Science

Why can't companies make standard measured products to sell within the USA and make metric measured products to sell outside the United States?

*asked on September 30, 2013* -
## Math

I need help solving a problem, I am stuck on this one. Write 128 in each one of the following bases a.Five b. Two c. Twelve

*asked on September 13, 2012* -
## Algebra

You invested $1 0,000 on two stocks paying 8% and 10% annual interest, respectively. At the end of the year, the total interest fiom these investments was $940. How much was invested at each rate?

*asked on April 3, 2012* -
## Pre Calculus

FACTOR COMPLETELY 1) x^8-y^8

*asked on September 13, 2011* -
## algebra

1. Imagine you are in the market for a new home and are interested in a new housing community under construction in a different city. a. The sales representative informs you that there are 56 houses for sale with two floor plans still available. Use x to

*asked on June 21, 2011* -
## 9th grade

what is the study of interactions of biological, cultural, geographical and historical aspects of humankind?

*asked on August 25, 2009* -
## Science

What is the life cycle of the pohutukawa? Please please help.

*asked on June 12, 2009* -
## physics

Drift velocity is best defined as a. the relationship between current and current density b. the number of mobile electrons per volume c. the number of mobile electrons per length d. the flux of the current density through a given area e. the average speed

*asked on March 23, 2008* -
## maths

find the stationary points of the following function f(x)=x^3-3x^2-24x-7

*asked on February 12, 2008* -
## US History

Unlike a small business, a corporation... a) is owned by stockholders b) passes liability for its debts to its stockholders c) depends upon an owner or owners for its existence d) is not publicly owned or traded on the stock market i think it is a. I

*asked on December 14, 2006* -
## Crestwood

A bag contains 3 yellow, 4 white, and 8 blue marbles. How many samples of 2 marbles are possible?

*asked on June 18, 2015* -
## ALGEBRA /116

Solve the inequality -5x/7-2>-1 1.x4.2 3.x-1.4

*asked on April 7, 2015* -
## algebra/116

Which set of points are on the line y=6x-6 1.{(0,-6),(12,3)} 2.{(0,-6),(3,12)} 3.{(-6,0),(12,3)} 4.{(6,0),(3,12)}

*asked on April 7, 2015* -
## math

Solve sec to the power of 2 times x minus 1 = 3, x such that [0,2pi).

*asked on January 26, 2015* -
## math

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 165 and a variance of 9. The material is considered defective if the breaking strength is less than 157.8 pounds. What is the probability that a single,

*asked on December 9, 2014* -
## chemistry

A mixture of ammonia and oxygen is prepared by combining 0.330 L of NH3 (measured at 0.710 atm and 22°C) with 0.200 L of O2 (measured at 0.740 atm and 51°C). How many milliliters of N2 (measured at 0.740 atm and 100. °C) could be formed if the following

*asked on December 3, 2014* -
## math

Give the probability in decimal form (correct to two decimal places). A calculator may be helpful. Last semester, a certain professor gave 15 As out of 396 grades. If one of the professor's students from last semester were selected randomly, what is the

*asked on December 2, 2014* -
## math

Evaluate the expression. 11! 6! 4! 2! 3! 1!

*asked on November 30, 2014* -
## math

Let U = {9, 10, 11, 12, 13, 14, 15}, A = {9, 10, 11, 12}, B = {9, 10, 13, 14}, and C = {11, 13, 15}. List all the members of the given set. (Enter your answers as a comma-separated list.) (A ¾ B) ¿ C

*asked on November 9, 2014* -
## Biology

In snapdragon plants, neither one of the petal colors is dominant to the other. The hybrids have a intermediate phenotype. If a homozygous red flower is crossed with a homozygous white flower, What will the offspring’s phenotype

*asked on May 16, 2014* -
## Geometry

Write an equation in slope-intercept form of the line through points S(-7,-6) and T(10,8).

*asked on March 9, 2014* -
## math

what is 2/3 divided by 3

*asked on December 29, 2013* -
## science

why is Denver Colorado weather different then western new York?

*asked on December 17, 2013* -
## Algebra

The perimeter of a rectangle equals the sum of its lengths of its 4 sides. If the width of a rectangle is 4 inches and its perimeter is 38 inches, find the length of the rectangle.

*asked on March 16, 2013* -
## Geometry

Forest rangers use degree measure to identify directions and locate critical spots such as fires. A forest ranger at tower A observes smoke at a bearing of 149 degrees (clockwise from the north) while another forest ranger at tower B observes the same

*asked on December 4, 2012* -
## Algebra

Need help rewriting this as a decimal. 5*10^3 + 2*10^2 + 4*10^-1 = If you can please show me how to do this that would be so helpful!

*asked on October 29, 2012* -
## Math/Algebra

Need help rewriting this as a decimal. 5*10^3 + 2*10^2 + 4*10^-1 = If you can please show me how to do this that would be so helpful!

*asked on October 29, 2012* -
## Math/Algebra

If the first term of a finite geometric sequence is .4 and its ratio is .3 what is the sum of the first 5 terms?

*asked on October 29, 2012* -
## chemistry

What is the formula for barium chloride

*asked on October 14, 2012* -
## science

why are the hydrogen atoms in a water molecule are attracted to Cl− ions in sodium chloride (NaCl)?

*asked on April 1, 2010* -
## math

how do i simplify this further x^2/sqrt(x^2+y^2)+y^2/sqrt(x^2+y^2)

*asked on February 18, 2010* -
## Comp I

How do use annotation on a newspaper article? What are the guide/rules for using underlining/boxing/circling wors, use of special characters such as *, etc.?

*asked on August 17, 2009*

## Pages

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