# Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 2x + 10y = 58 -14x + 8y = 140

91,718 questions, page 654
1. ## Science (planets/gravity)

What keeps all the planets the big ones and the small ones in orbit in our big solar system? A.The gravity from the sun. B.The gravity from the moon. C.The gravity between all the planets. D.The gravity from the beautiful our earth. What do all the planets

asked by Hot stuff on April 18, 2007
2. ## PHYSICS1

A particle moves along a circular path over a horizontal xy coordinate system, at constant speed. At time t1 = 4.90 s, it is at point (5.30 m, 5.30 m) with velocity (2.20 m/s) and acceleration in the positive x direction. At time t2 = 14.0 s, it has

asked by Bader on February 5, 2013
3. ## accounting

Trader sells 15 units for \$25 each on December 15. Eight of the sold units are from the December 7 purchase and seven are from the December 14 purchase. Trader uses a perpetual inventory system. Determine the costs assigned to the December 31 ending

asked by Airie on December 11, 2009
4. ## physics

A particle moves along a circular path over a horizontal xy coordinate system, at constant speed. At time t1 = 4.60 s, it is at point (4.30 m, 6.20 m) with velocity (3.30 m/s) and acceleration in the positive x direction. At time t2 = 13.0 s, it has

asked by hi on February 8, 2013
5. ## Physics

A particle moves along a circular path over a horizontal xy coordinate system, at constant speed. At time t1 = 4.80 s, it is at point (4.40 m, 6.20 m) with velocity (3.70 m/s) and acceleration in the positive x direction. At time t2 = 11.0 s, it has

asked by Nelson on October 3, 2011
6. ## Physics

"the total angular momentum of an object changes when a net external force acts on the system." This statement is: a)always true b) never true c) sometime true, it depends on the force's direction d)sometime true, it depends on the force's point of

asked by Andrea on November 7, 2007
7. ## Economics

The handmade snuffbox industry is composed of 100 identical firms, each having short – run total costs given by STC = 0.5q2 + 10q + 5 and short – run marginal costs by SMC = q + 10 where q is the output of snuffboxes per day. a) What is the short

asked by Pravinesh on November 2, 2011
8. ## AP Chemistry

a 5.15g sample of a hydrocarbon is burned in oxygen, producing 15.6g of carbon dioxide and 8.45g of water. Assuming an excess of oxygen, what is the empirical formula of the hydrocarbon? how do i set this problem up and how do i solve it?

asked by Ariday on September 13, 2011
9. ## Chemistry

Assuming that the smallest measurable wavelength in an experiment is 0.330 fm (femtometers), what is the maximum mass of an object traveling at 157 m·s^–1 for which the de Broglie wavelength is observable? mass = ? kg I know the formula but I don't know

asked by Anonymous on October 30, 2012
10. ## math

A jar contains 20 marbles: 4 red, 6 white and 10 blue. If you remove 1 marble at a time, randomly, what is the minimum number that you must remove to be certain that you have at least 2 marble of each color? I guessed the answer was 18 and it was correct

asked by john on August 6, 2014
11. ## Math

Gina works at a diner. She earns \$6 each hour plus tips.In one week,she worked 37 hours a week and earned \$43 in tips.How much did she make altogether? Write an equation. Use a variable for the unknown.Solve.

asked by Mikaela on December 7, 2016
12. ## physics

Two boat landings are 8.0 km apart on the same bank of a stream that flows at 2.8 km/h. A motorboat makes the round trip between the two landings in 50 minutes. What is the speed of the boat relative to the water? I think it is something along the lines of

asked by Delilah on August 10, 2014
13. ## Math

how do i figure out this equation? Joy knits a square blanket that has an area of 1,500 square inches. What is the approximate length of each side of the blanket? HELP !! Ms Sue! a 16 in b 27in 39 in 42 in i don't understand how to solve this!

asked by E.M on November 30, 2012
14. ## algebra

You earned the following scores on five science tests: 75, 82, 90,84, and 71. You want to have an average score of at least 80 after you take the sixth test. a. Write and solve an inequality to find the possible schores that you can earn on your sixth test

asked by Tyler on March 7, 2012
15. ## algebra

can someone help me solve this problem? What is the value of x? (3+2)(6-2)(7+1)=(4+4)(x) (5)(4)(8)=8x 8x=160 I don't get the last part x=20=8+12 where did the 12 come from? Perhaps I am missing something but I think the 8 + 12 is just another way of

asked by chrissy on August 2, 2007
16. ## Physics

How long will it take the voltage across the capacitor in an RC circuit to discharge 75% of its initial charged voltage if the resistor has a resistance of 450 kilo-Ohms and the capacitor has a capacitance of 49 micro-farads? How do I solve this problem?

asked by Greg on August 1, 2014
17. ## maths

solve the following by a quadratic equation and then solving it. a rocket is projected vertically upwards from ground level, its height "h" meters. how long does it take to reach 50 meters? you should have two answers, explain the meaning of the two

asked by Anonymous on April 30, 2017
18. ## Number stories

Aswan,Egypt is the driest inhabited place in the world.The average annual rain fall is 0.02 inch.Is this more or less than 1/4 inch per year? How do you solve this problem/ Duplicate post. Please do not post duplicates. less

asked by confuesed on November 6, 2006
19. ## physics

Suppose the fame of a gas burner stove emits light just like a blackbody. The flame appears blue,emiting most of its light at a wave lengh of 475nanometers. what is the temperature of the flame? How do I solve this?

asked by KatieSc on October 19, 2011
20. ## algebra

you receive a \$25 gift card card to a sporting goods store for your birthday. you are looking at skateboards and want to spend no more than \$85 of your own money. a. write and solve an inequality to find the prices(p)in dollars of skateboards you can buy

asked by blue13 on January 5, 2011
21. ## Chemistry step by step thank a lot

10L of hard water required 5.6g of line for removing hardness. hence temporary hardness in ppm of cac03. The answer is 1000 Pls solve it for me step by step Thank a lot all tutors for your help.

asked by ken on July 5, 2014
22. ## Math

For each babysitting job, Ashley charges \$2.50 for bus fare and \$8.00 per hour for each hour she works. She charged \$30.50 for her last babysitting jib. Write an equation representative if this situation. Do not solve it. What does the variable represent?

asked by Amy on September 19, 2016
23. ## Algebra

The cost C(n), in dollars, of making n large cheese pizzas in a night shift is given by a linear equation. There is a fixed cost of \$43.50. In addition there are wage costs of \$4.50 per pizza. Write the equation to solve.

asked by Sam S. on December 14, 2015
24. ## algebra

angela ate at the same restaurant four times each time she ate a salad and left a 5 dollar tip she spent a total of 54 dollars write and solve an equation to find the cost of each salad

asked by drew decker on October 19, 2011
25. ## currerent amd magnetism

An Aluminium wire of 1mm diammeter below the critical temperature of 1.2 K. iTS CRITICAL MAGNETIC FIELD IS 0.01t, What is the maximum current in Amperes that you can send down the wire for it to remain superconducting? what formular can I use to solve

asked by Tom on November 28, 2013
26. ## Chemistry

In a reaction Mg(s) + 2HCl(aq) → H2(g) + MgCl2(aq), 6.00 g of Mg was present at 0.00 min. After 3.00 min, 4.50 g of Mg remained. Express the average rate as mol of Mg consumed per minute. I was taught how to use molarity but this question does not tell

asked by Julia on April 30, 2017
27. ## Physics

A soccer ball accelerates from rest and rolls 6.5 m down a hill in 3.1 s. It then bumps into a tree. What is the speed of the ball just before it hits the tree? A formula to answer this question would be fine; you don't have to solve the whole thing.

asked by Heather on September 28, 2016
28. ## Pre-calc Math

Use the Law of Sines to solve for all possible triangles that satisfy the given conditions. (If an answer does not exist, enter DNE. Round your answers to one decimal place. Below, enter your answers so that ∠B1 is smaller than ∠B2.) a = 78, b = 109,

asked by Anthony on December 23, 2016
29. ## Physics

A spring (k = 857 N/m) is hanging from the ceiling of an elevator, and a 5.9 kg object is attached to the lower end. By how much does the spring stretch (relative to its unstrained length) when the elevator is accelerating upward at a = 0.81 m/s2? force=

asked by Mary on March 29, 2007
30. ## quantum physics

Can anyone help me to solve this problem? Suppose we have a particle in 1-dimension, with wavefunction Ae^(âˆ’|x|2d). What is the probability to find the particle in the interval [0,d]? Please provide your answer in terms of A, d, mathematical

asked by Judy on October 7, 2013
31. ## Math

Gina works at a diner. She earns \$6 each hour plus tips. In one week, she worked 37 hours a week and earned \$43 in tips. How much did she make altogether? Write an equation. Use a variable for the unknown. Solve

asked by Miley on November 30, 2015
32. ## Physics! Help!

Two planets of mass 3 x 1025kg are release from rest 1.5 x 1012 m apart. What is the speed of the planets when they are half this distance apart? Help! I've been stuck on this for a good bit! I cant seem to find a formula that can help me solve this! I can

asked by James on December 12, 2017
33. ## Chemistry step by step thank a lot

10L of hard water required 5.6g of lime for removing hardness. Hence temporary hardness in ppm of cac03 The answer 1000 Who helps me to solve it for me step by step clearly Thank a lot all tutors

asked by Ken on July 13, 2014
34. ## math

arnold has 24m of fencing to surround a garden, bounded on one side by the wall of his house. what are the dimensions of the largest rectangular garden that he can enclose? how do i solve this question please help step by step solutions please

asked by sunny on September 27, 2014
35. ## Maths - Matrices

Given: |4 -2| X = 2|-4 -4| |-1 1| | 2 2| What is X? I solved this and couldn't get an answer - that is, the result was undefined/null, as it didn't like how the multiplication worked. I got this for every way I tried doing it, including by transposing the

asked by Hannelore on June 6, 2017
36. ## Physics

In outer space, a constat net force of magnitude 140 N is exerted on a 32.5 kg probe initially at rest. (a) what acceleration does thie force produce? (b) how far does the probe travel in 10.0 s... I got a which equals 4.31 m.s^2 but how do i solve for b

asked by Sarah on June 10, 2009
37. ## Algebra

A sequence is defined recursively by the following rules: f(1)=3 f(n+1)=2⋅f(n)−1 Which of the following statements is true about the sequence? Select all that apply. f(5)=33 f(3)=10 f(4)=18 f(6)=66 f(2)=5 I cannot seem to figure out what to do, I even

asked by Jean on February 22, 2019
38. ## chemistry step by step clearly

10L of hard water required 5.6g of lime for removing hardness. hence temporary hardness in ppm of cac03. The answer 1000ppm I really want all tutors to solve it form clearly step by step. Thank a lot

asked by Ken on July 20, 2014
39. ## Math

lee and his family are planning a hiking trip on the Appalachian trail. they are packing food in 2lb bundles. how many bundles can they make with 36 lb of food? write a number sentence to help you solve this problem.

asked by Vivian on May 20, 2013
40. ## Physics-Please check

If I had the old-fashion camera that had a focal length of 35mm(0.035m) and I take a picture of a person 6 m away, how far does the film need to be from the lens to record a clear image? I know that the equation is 1/f = 1/d(object) + 1/d(image) so would I

asked by Roberto on February 12, 2011
41. ## Chemistry

A sample of air occupies 3.8 L when the pressure is 1.2 atm. (a) What volume does it occupy at 7.3 atm? (b) What pressure is required in order to compress it to 0.050 L? (The temperature is kept constant.) I already know the answers to each question, but

asked by Alex on March 14, 2011
42. ## Information Retrieval Architecture and Algorithms

What is the primary problem in Information Retrieval (IR) and what is the objective of an IR system? For each of the “Ingest” steps discuss how decisions on it can affect the primary problem (e.g., can it reduce the problem or have no effect) and the

asked by Nany on April 27, 2015
43. ## Writing/English

I was wondering if someone could look over this softcopy resume Nicole Medina Campus Address Permanent Address Education [Click here and state your degree earned, year graduated, school attended] Courses Related to Major: Cake Decorator I started training

asked by Cole on October 28, 2007
44. ## physics

If a stationary cart is struck head-on by a cart with twice mass of the stationary one and a velocity of 5 m/s, what will be the new velocity of the stationary cart if the collision is inelastic? Show all calculations leading to an answer.

asked by Ciara on April 5, 2015
45. ## exponents ,factor,fraction

The glee club has a set of 48 classical CD and a set of 42 show tune CD. Each set can be divided equally among the club member.what is the greatest possible number of club member. A.12. B.3. C.6. D.336

asked by lily on January 5, 2015
46. ## Chem

Complete combustion of 8.30 g of a hydrocarbon produced 26.7 g of CO2 and 9.10 g of H2O. What is the empirical formula for the hydrocarbon? My Work: First I tried to find the Amount of C and H in the product... Which I got 1 Mole of Carbon and 2 moles of

asked by Dan on October 21, 2015
47. ## physics

You have three metals - lithium, aluminum, and mercury. Their work functions are: 2.30, 4.10eV, and 4.5eV respectively. Light with a frequency of 1 x 10^15 Hz is incident on all three metals. Determine (a) which metals will emit electrons and (b)the

asked by daniela on March 21, 2012
48. ## Chemistry

Increasing the surface area will increase the reaction rate in: 1. N2(g) + O2(g) -> 2NO(g) 2. 2Mg(s) + O2(g) -> 2MgO(s) 3. CaCO3(s) + 2H+(aq) -> Ca2+(aq) + H2O(l) + CO2(g) MY WORK: I think it is 2 & possibly 3. 1 is a homogeneous reaction but is 3 a

asked by katie on October 16, 2014
49. ## physics

A sled with mass 20 kg is given a shove up a frictionless incline which makes an angle of 28 degrees with the horizontal. eventually the sled comes to rest at height of 1.35 m above where it started. a)calculate its initial speed. b)find the work done by

asked by unknown on June 13, 2011
50. ## Physics

A man drinks a bottle of beer and proposes to work off it's 460 kj by exercising with a 20-kg barbell. If each lift of the barbell from chest height to over his head is through 60 cm and the efficiceny of his body is 10 percent under these circumstances,

asked by Aly on December 31, 2009
51. ## Physics

Please help!! I know how to work the problem to find velocities, but this one has me stumped! A 2.0kg block slides along a frictionless surface at 1.0m/s . A second block, sliding at a faster 4.4m/s , collides with the first from behind and sticks to it.

asked by Bonnie on October 18, 2014
52. ## social studies

Please help me answer these questions, as I have no idea about it. 1) Why do naturalist movements tend to be fractured (why don't they work out...) 2) How does this affect the post-colonial administration of successor states? Please help answer, or provide

asked by Raven on January 14, 2011
53. ## physics

A person takes in a breath of 27C air and holds it until it warms to 36.5C. The air has an initial volume of 0.39 L and a mass of 0.00077 kg. Determine the work done by the air on the lungs if the pressure remains constant at 1 atm. Answer in units of J

asked by scott on February 19, 2013
54. ## Chemistry

What is the percent by mass of C in methyl acetate (C3H6O2)? The molecular weight of carbon is 12.0107 g/mol, of hydrogen 1.00794 g/mol, and of oxygen 15.9994 g/mol. Answer in units of %. Please work it out for me so I totally understand it. Thanks!

asked by Randy on December 6, 2009
55. ## Confidentiality of Health Information

Jane Doe does not want her violent boyfriend to know shes getting an abortion. She asks Dr. John to send all communications to her to a post office box and to phone her only at work. If he doesnt, Dr.John could be endangering her. What should Dr. John do,

asked by Ella on May 19, 2009
56. ## Calculus

A biker is slowing down according to the following table of velocities: Time (secs) 0 1 2 3 4 Velocity (feet/sec) 25 20 16 12 10 Approximate the distance traveled, in feet, during these 4 seconds using 4 rectangles and a Left Riemann Sum. A. 20.75 B. 58

asked by Justin on July 9, 2019
57. ## Chemistry

Why are the hydrogen bonds of a certain molecule weaker in solution (with water as a solvent) than in a vacuum? I'm supposed to have three reasons, and so far all I can come up with is that the water lowers the activation energy required to form the bond

asked by Sarah on December 14, 2017
58. ## calculus

Please help . confused here. The rate of change of an investment account earning continuous compound interest is given by dA/dt=kA where k is a positive constant. The initial account value was \$2500. At the end of the third year, the account value was

asked by mikey2 on March 11, 2013
59. ## math

The lists below show the players who will be competing in two different games.Both games are pure chance;it is equally probable for any player to with either game. Game 1:Jen,Fred,Monique,Darryn Game 2:Craig,Sarah,Yvonne,Allan What is the probability that

asked by kennedy on January 21, 2015
60. ## Pre-Calc

A rectangular package to be sent by a delivery service can have a maximum combined length and girth (perimeter of a cross section) of 120 inches. a. Show that the volume of the package is V(x)= 4xsquared(30-x) b. Use your graphing calculator to find the

asked by Hannah on September 26, 2010
61. ## Electricity - question for bobpursley

www.jiskha.com/questions/1791803/In-a-series-circuit-there-are-4-resistor-with-one-battery-cell-theres-no-diagram on the website above this message, you said: On r3, get current by P=I^2/R Then if you circuit current, so you know Rtotal (100/current) then

asked by anonymous on April 14, 2019
62. ## Physics

in his attempt,a long jumper took off from the spring board with a speed of 8ms^-1 at 30° to the horizontal. He makes a second attempt with the same speed at 45° to the horizontal.Given that the expression for the horizontal range of the projectile is

asked by Sebastian on June 9, 2019
63. ## Economics

Willy's widgets, a monopoly, faces the following demand schedule (sales of widgets per month): Price \$20 30 40 50 60 70 80 90 100 Quantity 40 35 30 25 20 15 10 5 0 Calculate marginal revenue over each interval in the schedule (for example, between Q = 40

asked by KEN on November 26, 2006
64. ## english

Use at least five adverbs and five adjectives to write a brief review of a movie, sporting event, musical performance, or television show. • Bold each adverb. • Underline each adjective. • Compare the event to one or more similar events. When

asked by rene on October 30, 2010
65. ## Biology

10. Which of the following is NOT true about the digestive system of annelids? a. It contains setae to move the food through the anus b. It is similar to an open tube c. It passes nutrients through the intestinal wall to the bloodstream d. It stores soil

asked by mysterychicken on March 9, 2010
66. ## Biology

10. Which of the following is NOT true about the digestive system of annelids? a. It contains setae to move the food through the anus b. It is similar to an open tube c. It passes nutrients through the intestinal wall to the bloodstream d. It stores soil

asked by mysterychicken on March 9, 2010
67. ## Math sin/cos

On a piece of paper draw and label a right triangle using the given sides, solve for the unknown side and write the trigonometric functions for angles A and B, if a=5 and c=7. I already found side b which equals 2 sqrts of 6. Now I need to find the sin/cos

asked by Anonymous on March 10, 2007
68. ## Physics

A particle of mass m1 = 2.5 kg moving along the x axis collides with a particle of mass m2 = 4.9 kg initially at rest. The incoming particle is deflected in the direction 22 degrees above the x axis, whereas the target particle moves off at 15 m/s at 37

asked by Ana on November 5, 2016
69. ## Geometry

I keep getting the same answer but it is wrong. How do I work this? M is the midpoint of AB. The coordinates of A are (-4, -2) and the coordinates of B are (9,-6). What are the coordinates of M?

asked by Sandra on September 28, 2014
70. ## Humanities of Arts and Culture

Complete a virtual tour of an art museum exhibition located on the Internet. Post a 350-700 word response discussing the museum exhibition and your reaction to the visit. Your response should include the following: 1. Name of the museum, 2. URL for the

asked by B.B. on January 25, 2009
71. ## Chemistry

Calculate the number of grams of solid Mg(OH)2 that will dissolve in 650 mL of water. For Mg(OH)2, Ksp = 1.5 x 10-11. Assume no volume change for the solution when the solid is added. A. 0.0093 B. 0.0059 C. 0.012 D. 0.019 E. 0.060 I got 0.0059, but I'm not

asked by Jessica on December 26, 2012
72. ## Chemistry

(a) What is the pH of 50 mL of a 0.2M glycolic acid aqueous solution after adding 5 mL of 0.25 M KOH? The pKa of glycolic acis is 3.83 at 25 Celsius. (b) Classify each of the following compounds as either "acidic", "basic", or "amphoteric" (able to act as

asked by Chemgam on January 11, 2013
73. ## Chem-HELP

Can you please help me with these questions. I tried looking up information online and in my textbook but I could not find sufficient information to help me. 1. What is an aliquot of a sample? 2. What is the filtrate in a gravity procedure? 3. How full

asked by Zef on September 9, 2015
74. ## chemistry

In an experiment, 95.0 mL of 0.225 M silver nitrate was mixed rapidly with 47.5 mL of 0.225 M calcium chloride in a coffee cup calorimeter. If a reaction occurred, was it exothermic or endothermic? If the reaction started at 23.7 °C, what is the final

asked by - on April 22, 2016
75. ## Chemistry105

When 50.0 Ml of 1.00 m chi was mixed with 50.0 ml of 1.00 m NaOH in a calorimeter the temperature rose from 25.0 c to 32.0 c calculate the heat change for the reaction assuming that the total volume of the solution is 100.0 ml and the specific heat is 1.00

asked by Mira on December 2, 2012
76. ## chemistry

Write the balanced molecular, complete ionic, and net ionic equations for the following reactions in aqueous solution: a. magnesium chloride reacts with potassium carbonate b. sulfuric acid reacts with sodium hydroxide

asked by gold on October 13, 2011
77. ## chem

Sulfuric acid reacts with sodium hydroxide according to this equation: H2S04 + 2 NaOH Na2(SO4) + 2 H2O A 10.00 mL sample of the H2SO4 solution required 13.71 mL of 0.309 M NaOH for neutralization. Calculate the molarity of the acid.

asked by Liang9506 on November 21, 2012
78. ## Chemistry105

When 50.0 Ml of 1.00 m chi was mixed with 50.0 ml of 1.00 m NaOH in a calorimeter the temperature rose from 25.0 c to 32.0 c calculate the heat change for the reaction assuming that the total volume of the solution is 100.0 ml and the specific heat is 1.00

asked by Mira on December 2, 2012
79. ## AP Chemistry

What acid and what strong base would react in aqueous solution to produce the following salts in the formula equation? Write the balanced formula equation for each reaction. a. potassium perchlorate b. cesium nitrate c. calcium iodide

asked by Angel on November 8, 2009
80. ## Chemistry

In an experiment, 95.0 mL of 0.225 M silver nitrate was mixed rapidly with 47.5 mL of 0.225 M calcium chloride in a coffee cup calorimeter. If a reaction occurred, was it exothermic or endothermic? If the reaction started at 23.7 °C, what is the final

asked by Nick on October 12, 2017
81. ## chemistry...

thanks for the last help, i got the right answer!! i got this wrong... (answer is supposed to be 0.165 but i put 0.0652) A sample of Na2CO3 weighing 0.2863 g is dissolved in 50 mL of water and an endpoint is reached when 32.83 mL of HClO4 has been added.

asked by mark on November 16, 2007
82. ## ap chemistry

How many moles of sodium acetate (NaCH3COO) must be added to 1.000 liter of a 0.500M solution of acetic acid (CH3COOH) to produce a pH of 5.027? The ionization constant of acetic acid is 1.8 × 10−5. Answer in units of mol

asked by gabriella on February 4, 2014
83. ## chemistry

a solid sample of impure Ba(OH02 is added to .4000L of .5000M of HBr. the remaining solution was acidic, it was then titrated to equivalence point with .1200L of .5000M NaOH. what mass of pure Ba(OH)2 was present in the sample?

asked by mel <3 on February 26, 2011
84. ## Chemistry

3) A student dissolves a 1.18g aspirin tablet in water and titrates the solution with a .265M NaOH. 22.05mL of NaOH are required to reach the equivalence point. Calculate the percentage of acetylsalicylic acid in the tablet.

asked by Juliet on October 25, 2010
85. ## ochem lab

What is the expected observed rotation of a 9.1 x 10-5 M solution of compound X? Note: compound X has a specific rotation of [α]D20 = -49o and a molecular weight of 235.2 g/mol. In addition, the path length of the cell used to take the polarimetry

asked by cn on April 2, 2012
86. ## Chemistry

A student titrated a solution containing 3.7066 grams of an unknown triprotic acid to the end point using 28.94 milliliters of 0.3021 M KOH. What is the molar mass of the unknown acid? And write a balanced equation for the reaction.

asked by Cassie on March 26, 2011
87. ## Chemsitry II

50.00 mL of 1.0 M HCl and 50.00 mL of 1.0 M NaOH are mixed. The temperature is observed to increase by 10.0 degrees C. How much energy (in J) was absorbed by the calorimeter? Assume a density of the reaction mixture of 1 g/mL. Specific heat of the solution

asked by Sarah on May 31, 2011
88. ## Chemistry

Can someone please help me out here? I've tried several times and i keep getting the wrong answer :( lol A small crucible is filled with 100.00 mL of n-hexadecane (MW (226.44 g/mol), density (0.7703 g/mL)) and 2.10 L of 7-octenyltrichlorosilane (MW (245.65

asked by Tawnya on January 21, 2013
89. ## chemistry

A student adds .137 grams of nickel(II) hydroxide powder to 10.0 L of distilled water at 25C with vigorous stirring. Did all of the powder dissolve? If not, how much powder remains undissolved? If so, how much more powder can be dissolved before a

asked by Tyler on July 17, 2011
90. ## Inverse Trigonometric Functions

If sin-1(x/a) + sin-1(y/b) = sin-1(c^2/ab) then show that b^2x^2 + 2xy(a^2b^2 + c4) + a^2y^2 = c^4.

asked by Ranajoy on July 25, 2015
91. ## MATHEMATICS

a) Given that A+B =120¢ª and cos A + cos B = 1/¡î2 show that cos(A+B)/2 =1/¡î2

asked by ceasar on June 21, 2011
92. ## Trig

How do we show (sin 10)^2 + (sin 50)^2 + (sin 70)^2 = 3/2 ??? I can't even think of a way to start this..

asked by Ashley on December 1, 2017
93. ## mathematics

Given that A+B =120¢ª and cos A + cos B = 1/¡î2 show that cos(A+B)/2 =1/¡î2

asked by CHRYSTABELLE on June 21, 2011
94. ## college calculus

lim x->a f(x)= 0 , lim x->a g(x)=infinity show that lim x->a [f(x)]^(g(x))= 0

asked by Anonymous on February 8, 2012
95. ## algebra

Marcella and Rupert bought party stuff. Marcella bought 3 packs of ballooons and 4 packs of favors for a total of \$14.63. Rupert bought 2 packs of balloons and 5 packs of favors for a total or \$16.03. Find the price of each and write a system of equations

asked by Melissa on November 8, 2009
96. ## Accounting 100 Receivables

During October, German Imports had sales of \$180,000, which included \$120,000 in credit sales. October collections were \$90,000. Other data include September 30 debit balance in Accounts Receivable 28,000. September 30 credit balance in allowance for

asked by Cindy on November 21, 2006
97. ## algebra

solve the equation or formula for the indicated variable R=ts^2+3 a)s=under radical R-3/t (not under radical b)s=everything under radical R-3/t c)s=R (under radical)-3/t d)s=everything under radical R/t-3 Thanks again I feel really stupid not being able to

asked by Kandy on August 28, 2014
98. ## Algebra

I had to solve the function g of f where f is x^2+1 and g is sq. root of x. I wrote this out as the sq. root of x^2+1. The ^2 and the sq. root canceled each other out, so I was left with x + sq. root of 1. But my book got sq. root of x^2+1. Was the further

asked by Adriana on October 28, 2009
99. ## Math

Solve for the length of the unknown side in the following right triangle. (Side AC is the hypotenuse.) Round your answer to two places, where applicable. Side AB ? Side BC=12 Side AC=19

asked by Jim on July 18, 2012