# Libby

Most popular questions and responses by Libby
1. ## 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?

2. ## 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

3. ## 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

4. ## Math

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

5. ## 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

6. ## 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)

7. ## 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?

8. ## 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?

9. ## 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 a 10mL sample of this solution was withdrawn and diluted to 250mL. from this diluted solution, a 5 mL sample was withdrawn and diluted to 100 mL.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

10. ## 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

11. ## 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?

12. ## 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?

13. ## 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

14. ## 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

15. ## Math

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

16. ## 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)

17. ## 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?

18. ## Math

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

19. ## 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?

20. ## 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?

21. ## 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?

22. ## distributive property

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

23. ## 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.

24. ## Math

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

25. ## Math 221

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

26. ## algebra

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

27. ## 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?

28. ## 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

29. ## Help with History

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

30. ## 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!

31. ## 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?

32. ## trig

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

33. ## Math

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

34. ## 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

35. ## 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

36. ## 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

37. ## 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?

38. ## chemistry

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

39. ## 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.

40. ## 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!

41. ## 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

42. ## 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

43. ## 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?

44. ## 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?

45. ## Math 221

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

46. ## Math 221

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

47. ## Law

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

48. ## 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

49. ## math

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

50. ## Math 221

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

51. ## Math 221

2 5 - / - 9 12 / is divided by

52. ## 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.

53. ## 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

54. ## math

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

55. ## Algebra

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

56. ## Math

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

57. ## 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

59. ## 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

60. ## 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

61. ## 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

62. ## 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

63. ## 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.

64. ## 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?

65. ## 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

66. ## 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

67. ## Math

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

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

69. ## 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?

70. ## 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

71. ## 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?

72. ## Pre Calculus

FACTOR COMPLETELY 1) x^8-y^8

73. ## 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

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

76. ## 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

77. ## maths

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

78. ## 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

79. ## Crestwood

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

80. ## ALGEBRA /116

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

81. ## 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)}

82. ## math

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

83. ## 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,

84. ## 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

85. ## 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

86. ## math

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

87. ## 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

88. ## 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

89. ## Geometry

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

90. ## math

what is 2/3 divided by 3

91. ## science

why is Denver Colorado weather different then western new York?

92. ## 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.

93. ## 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

94. ## 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!

95. ## 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!

96. ## 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?

97. ## chemistry

What is the formula for barium chloride

98. ## science

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

99. ## math

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