# 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 785
1. ## Algebra

9. When doctors prescribe medicine, they must consider how much the drug’s effectiveness will decrease as time passes. If each hour a drug is 20% less effective as the previous hour, at some point the patient will not be receiving enough medicine and

asked by Daniela on July 13, 2015
2. ## Managerial Economics

Looking at controlling government roles in managing health risks in society it faces from exposure to environmental pollution. One major problem that was examined was the cleanup of hazardous waste sites. Some people were extremely critical of policymakers

asked by Sharon Williams on May 25, 2007
3. ## write a summary

on bill clinton's speech. i have In William Clinton's speech, "remarks to the Convocation of God in Christ," Bill Clinton argues for a better future for American Citizens. He continuously tries to persuade American Citizens to take action and make america

asked by Reina B. on October 23, 2013
4. ## statistics

=weight of oranges in a 5-lb bag ~ N(m,0.2); (a) How many customers get cheated, if E(X)=5? (proportion p=________?) (b) What should m equal so that (a) p

asked by Nicole on November 12, 2014
5. ## Reposting question- Pre-calc

HI, Function: y=5cot(-2x) can someone can please help me find the coordinates of the two halfway points of the principal cycles. Here are some answers that might help. -I found the interval: (0,pi/2) -The equation of the left vertical asymptote: x=0, and

asked by chizoba on August 9, 2016
6. ## Physics-ASAP

A plane has an airspeed of 200 {mph}. The pilot wishes to reach a destination 600 {mi} due east, but a wind is blowing at 50 {mph} in the direction 30 degrees north of east. a)In what direction must the pilot head the plane in order to reach her

asked by Fizza on September 28, 2011
7. ## physics

Consider an object on which the net force is a resistive force proportional to the square of it's speed? For example assume the resistive force acting on a speed skater is f = -kmv^2, where k is a constant and m is the skater's mass. The skater crosses the

asked by steve huerta on February 22, 2010
8. ## Math

A television manufacturer makes console and wide-screen televisions. The profit per unit is \$125 for the console televisions and \$200 for the wide-screen televisions. Write the objective function that describes the total monthly profit. Write a system of

asked by Bob on June 12, 2010
9. ## Physics! Help!

Vector A, a wind velocity vector, has a magnitude of 20 miles per hour and is blowing toward the North. A second wind velocity vector, Vector B, has a magnitude of 50 miles per hour and is blowing toward the Southeast. A third wind velocity vector, Vector

asked by Kayla on October 4, 2017
10. ## Physics

Vector A, a wind velocity vector, has a magnitude of 20 miles per hour and is blowing toward the North. A second wind velocity vector, Vector B, has a magnitude of 50 miles per hour and is blowing toward the Southeast. A third wind velocity vector, Vector

asked by Lala on October 4, 2017
11. ## Chemistry

calculate the freezing point of a solution containing 12.2 grams of benzoic acid, dissolved in 250 grams of nitrobenzene. the freezing point of nitrobenzene is 5.7 celsius and its freezing point depression constant is 7.0 celsius/m. please help

asked by Joshua on October 27, 2008
12. ## Physics

The incident ray comes at 30 degrees to normal at the air/glass boundary and is refracted at 18 degrees to normal. a) find index of refraction of glass b)find speed of light in glass c) under what conditions and for what angles will you have total internal

asked by Andrea on April 16, 2008

Contact: John Hemington, Human Resource director S+F Media is seeking a new member for our web design team. An innovator at the top of the field, S+F media has been delivering sleek, polished websites and user interfaces to our clients for more than 5

asked by Lili on May 10, 2019
14. ## Chemistry

Initially, 1.68 mol of PCl5(g) and 0.36 mol of PCl3(g) are in mixed in a 2.00 l container. It is later found that 1.44 mol of PCl5 are present when the system has reached equillibrium. Calculate the value of the equllibrium. This is what I did: Equation:

asked by Lena on July 19, 2009
15. ## Physics

A CD has a mass of 15.0 g, an inner diameter of 1.5 cm, and an outer diameter of 11.9 cm. Suppose you toss it, causing it to spin at a rate of 4.5 revolutions per second. (a) Determine the moment of inertia of the CD, approximating its density as uniform.

asked by mymi on October 24, 2011
16. ## c++ programming

Solve the following problem. Apply all the steps i.e decomposition, Flowcharting and Pseudo code. Also write C++ program. Design and Write an interactive program that computes the salary in Rupees of a part-time employee based on: - Number of days worked.

asked by hafsa on March 20, 2012
17. ## Math

A ladder 20 m long rest against a vertical wall so that the foot of the ladder is 9 m from the wall a. Find, correct to the nearest degree, the angle that the ladder makes with the wall b. Find, correct to 1 decimal place, the height above the ground at

asked by Ayomide on May 9, 2019
18. ## Biology

Can someone please check if my answers are correct? 17. Functions of the nucleus include a. directing the function of the cell b. the partial assembly of ribosomes c. storing most of the hereditary information of the cell d. all of the above D? 18.

asked by mysterychicken on January 22, 2010
19. ## Spanish

Hi there, I need to answer a few questions and I want to make sure I wrote them out correctly. Can you please check my answers? 1. if you were president, what would be your most important decision Si yo fuera presidente, me gustaría bajar los impuestos 2.

asked by Jenny on October 31, 2015
20. ## History

Can someone please check my work? 18) Many wealthy American industrialists of the late 19th century used the theory of Social Darwinism to: a. Support the labor union movement b. Justify monopolistic actions c. Promote legislation establishing a minimum

asked by Abby on November 7, 2015
21. ## English

Here are the other sentences.Thank you. 1) She took on responsibility for the whole family.She forgot to turn down the gas and burned her dinner. 2) How many people turned up at your party? That child is bringing up food. She brought up three children

asked by Henry on February 29, 2012
22. ## math

Solve for x: x square root of 3-2=5x square root of 3?

asked by anonymous on May 31, 2010
23. ## math

600,000 - x / 600,000 = .10 solve for x.

asked by Any help me! on May 1, 2010
24. ## College Algebra

How do you solve 3 log(base 2)*(x-1)+ log(base 2)4=5

asked by Hope on November 12, 2012
25. ## Math

How do you solve this? 8-2(t-1)=t+7 The answer is suppose to be 1 u-8-3u=2u+7 The answer is suppose to be -15/4

asked by Veronica on February 3, 2010
26. ## math

how to solve: tan(sin(x))=tan(x)sin(x)?

asked by bob on February 27, 2013
27. ## Math

Solve the equation. log 6.44 + 3 log x - log x^2 = log 6.44 + 3

asked by Urgent!! on April 17, 2010
28. ## Algebra

Can someone help solve this step by step log2 4 + log2 (c-9) = 5

asked by Ash on February 21, 2019
29. ## Math

Solve log base 2 of (3x-1) - log base 2 of x = -2

asked by Lilly on December 17, 2013
30. ## chemistry

How do I solve this for c? Ka = (0.02c)(0.02c)/(c-0.02) 1.7x10^-5=(0.02c)(0.02c)/(c-0.02) Thanks.

31. ## Algebra 2

Solve using linear combinations. x - 5y = 6 3x + 4y = 18 What are linear combinations?

asked by Peter on October 3, 2011
32. ## Math

600,000 - x / 600,000 = .10 solve for x.

asked by Mark on May 1, 2010
33. ## wuzzles

asked by tommy on February 9, 2016
34. ## algebra

solve: the square root of (x) +2= the square root of (5-x) +3

asked by larissa on July 22, 2008
35. ## calculus

How to solve for "t" - step-by-step sqrt(2t-1) + sqrt(3t+3) = 5 Thank you very much.

asked by Jonathan on October 15, 2011
36. ## maths

solve the equation log(y)/log(2) + log(y)/log(4) = 6

asked by dan on April 10, 2016
37. ## calculus PLZ HELP!

Solve for x: log base 25 (log base 7 X)= -1/2

asked by Saiyuri on April 12, 2012
38. ## MATH

Look at this inequality 4m-9

asked by katie on December 30, 2011
39. ## math

asked by Jenna on May 17, 2009
40. ## geometry

solve for x if angle 1 and angle 2 are supplementary: angle 1= 5x+6 angle 2= 3x

asked by gman23 on October 15, 2012
41. ## algebra

Graph the equation y = 4 x + 8. How do you solve For y and x so I can graph the equation?

asked by Ruth on January 29, 2015
42. ## Math

square root (x-3)-square root(x)=3 can someone please solve this for me

asked by Jeffery Reffery on January 21, 2017
43. ## Algebra

F1 sin 30 + F2 sin 80 = M g F1 cos 30 - F2 cos 80 = 0 How would I solve for F1 and F2 here?

asked by Sarah on March 13, 2010
44. ## Physics

The truss structure ABCD is loaded with a concentrated force P = 2 kN applied at a 45° angle at joint D as indicated in the figure. All bars in the truss have equal cross sectional area and are made of the same homogeneous linear elastic material. The

asked by simonsay on May 14, 2013
45. ## science-chemistry

We performed a titration with NaOH solution with KHP. Now I need to calculate the average molarity of NaOH based on this data Weight of khp= 0.1083 g Volume of naoh = 6.4 ml Then if i get this how do i get the molarity of ch3cooh totrated in naoh with the

asked by cassy on April 23, 2014
46. ## math

how do i do x2+12x+32 x2+12x = 14x+32 subtract 14x from each side 14x=32 divide by 2 7x=16 x=16/7, which is 2 and 2/7 ok maybe you typed that question wrong? is it x^2 + 12x + 32 ? if it is then the solution is: (x+8)(x+4) because when you multiply them

asked by bob on February 14, 2007
47. ## Math

I have a math sheet for homework and most questions are similar to the following: Bob is making treat bags for his daughter's birthday party. he decided to use the recipe below for each bag. 1/3 cup peanuts 3/4 cup pretzels 1/5 cup raisins 2/3 cup popcorn

asked by Bryan on October 14, 2008
48. ## math

My son has been given the collinear problem below that has be stumped two folds. 1- By trying to solve the problem using (y2-y1)/(x2-x1)=slope -- and then, find the (b) in y=mx+b for two points takes way way too long to be a 7th grade probem. My son has

asked by sally on January 27, 2013
49. ## physics

The most convenient way to express vectors in the two dimensional plane is in the familiar (x,y) Cartesian coordinates. However, one can express vectors in other coordinate systems as well. For example, another useful coordinate system for the plane is

asked by raja harishchandra on June 13, 2013
50. ## physics

The most convenient way to express vectors in the two dimensional plane is in the familiar (x,y) Cartesian coordinates. However, one can express vectors in other coordinate systems as well. For example, another useful coordinate system for the plane is

asked by Anonymous on June 13, 2013
51. ## physics

The most convenient way to express vectors in the two dimensional plane is in the familiar (x,y) Cartesian coordinates. However, one can express vectors in other coordinate systems as well. For example, another useful coordinate system for the plane is

asked by rishabh on June 10, 2013
52. ## science

The most convenient way to express vectors in the two dimensional plane is in the familiar (x,y) Cartesian coordinates. However, one can express vectors in other coordinate systems as well. For example, another useful coordinate system for the plane is

asked by Abhishek on June 13, 2013
53. ## physics

The most convenient way to express vectors in the two dimensional plane is in the familiar (x,y) Cartesian coordinates. However, one can express vectors in other coordinate systems as well. For example, another useful coordinate system for the plane is

asked by raja harishchandra on June 12, 2013
54. ## physics

The most convenient way to express vectors in the two dimensional plane is in the familiar (x,y) Cartesian coordinates. However, one can express vectors in other coordinate systems as well. For example, another useful coordinate system for the plane is

asked by raja harishchandra on June 11, 2013
55. ## physics

The most convenient way to express vectors in the two dimensional plane is in the familiar (x,y) Cartesian coordinates. However, one can express vectors in other coordinate systems as well. For example, another useful coordinate system for the plane is

asked by raja harishchandra on June 13, 2013
56. ## science

The most convenient way to express vectors in the two dimensional plane is in the familiar (x,y) Cartesian coordinates. However, one can express vectors in other coordinate systems as well. For example, another useful coordinate system for the plane is

asked by raja harishchandra on June 14, 2013
57. ## physics

The most convenient way to express vectors in the two dimensional plane is in the familiar (x,y) Cartesian coordinates. However, one can express vectors in other coordinate systems as well. For example, another useful coordinate system for the plane is

asked by anonymous on June 14, 2013
58. ## physics

The most convenient way to express vectors in the two dimensional plane is in the familiar (x,y) Cartesian coordinates. However, one can express vectors in other coordinate systems as well. For example, another useful coordinate system for the plane is

asked by Anonymous on June 14, 2013
59. ## Physics

You kick a soccer ball, compressing it suddenly to 2/3 of its original volume. In the process, you do 410 J of work on the air (assumed to be an ideal gas) inside the ball. (a) What is the change in internal energy of the air inside the ball due to being

asked by Baker on February 25, 2010
60. ## calculus

A trough is 9 feet long and 1 foot high. The vertical cross-section of the trough parallel to an end is shaped like the graph of y=x4 from x=−1 to x=1 . The trough is full of water. Find the amount of work in foot-pounds required to empty the trough by

asked by Catherine on January 29, 2015
61. ## Physics

a 5kg block is pushed 3m up a vertical wall with constant speed by a constant force of magnitude f applied at an angle of 30 degrees with the horizontal. if the coefficient of kinetic friction between block and wall is .3, determine the work done by a) f

asked by Annette on April 20, 2013
62. ## math

vector a is 8 ft., vector b is 2 ft, and theta is at 41 degrees. find the resultant and the direction. I drew a diagram that shows a connecting with b (head to tail), and they make the 41 degrees. I use law of cosines and got about 6ft, which doesn't sound

asked by Anonymous on November 18, 2009
63. ## Algebra

Need help plz. Don't really get this "reversing the digits" What is this really called in math language? Prob:Find the product of 32 and 46. Now reverse the digits and find the product of 23 an 64. The products are the same. Does this happen with any pair

asked by Katti on July 7, 2010
64. ## Math

Which probability interpretation is most reasonable to use: relative frequency, subjective, or classical? The probability your company's sales will exceed seven million dollars this year. Is this relative frequency? The probability that the S&P will

asked by Stacy on November 19, 2011
65. ## random

this website is so helpful but i am confused on some things 1) the people who answer questions is this their job or are they volunteering to for free and what do they gain out of this 2)do the tutors who answer questions sit at home and answer or at some

asked by ray on January 22, 2017
66. ## Math

Which probability interpretation is most reasonable to use: relative frequency, subjective, or classical? The probability your company's sales will exceed seven million dollars this year. Is this relative frequency? The probability that the S&P will

asked by Morris on November 19, 2011
67. ## Chemistry

A critical reaction in the production of energy to do work or drive chemical reactions in biological systems is the hydrolysis of adenosine triphosphate, ATP, to adenosine diphosphate, ADP, as described by ATP(aq)+H20(l)-->ADP(aq)+HPO4^2-(aq) for which

asked by ACDub on March 30, 2014
68. ## Chemistry!

Use the equation below and determine what volume of O2 at STP is needed to react with 1.5 moles of C2H4? Balanced equation: C2H4 + 3O2 --> 2CO2 + 2H20 So 1 mole of C2H4/3 mol O2 --> 1.5 mols/ 4.5 mols O2. So if its 1 mol equals 1 liter, than it should be

asked by Casey on July 10, 2010
69. ## P.E /.....

PLZ PLZ PLZ HELP. Trying to get over quiz Harvey has his heart set on making the state finals for his track team in the 100 yard dash. Although Harvey knows there are many factors to improving his time and becoming an elite sprinter, one skill is paramount

asked by Samantha on December 21, 2013
70. ## English language

Please help me. Identify each simple subject and each simple predicate in the following sentences using S. S. for simple subject and S. P. for simple predicate. A. My brother is going to college next year. B. That was a funny puppet show. C. My aunt is

asked by Banko on May 21, 2017
71. ## Chem 2

A mixture containing KCLO3, K2CO3, KHCO3, and KCL was heated, producing CO2, O2, and H2O (water) gases according to the following equations: 2KCLO3 -> 2KCL + O2 2KHCO3 -> K2O + H2O + 2CO2 K2CO3 -> K2O + CO2 The KCL does not reacnder the conditions of the

asked by Pat on September 13, 2007
72. ## Chemistry

That worked out perfectly! I understand where you're going now! THANK YOU SO MUCH!!! Use the electron-dot symbols to show how the bonding (covalent or ionic) takes place. Use as many of each atom as needed for: 1. Carbon and Hydrogen 2.Silicon and Fluorine

asked by Megan on January 8, 2007
73. ## STATISTICS

Who is the king of the late night TV? An internet survey estimates that, when given a choice between David Letterman and Jay Leno, 52% of the population prefers to watch Jay Leno. Suppose that you randomly select three late night TV watchers and ask them

asked by Hayli on September 29, 2010
74. ## algebra

The volleyball team at West View High School is comparing T-shirt companies where they can purchase their practice shirts. The two companies, Shirt Box and Just Tees, are represented by this system of equations where x is the number of T-shirts and y is

asked by joanne on May 23, 2016
75. ## Algebra 2 Problem

You own a computer store selling two types of laser printers. The first type,A, costs \$141 and you make a \$45 profit on each one. The second type,B, costs \$110 and you make a \$35 profit on each one. You expect to sell at least 100 laser printers this month

asked by Grace on October 27, 2011
76. ## maths-probability

The diagram shows a spinner with six numbered sections.(where it has number 2 twice, # 1 triple & # 6 once ) Some of the sections are shaded. Each time the spinner is spun it stops on one of the six sections. It is equally likely that it stops on any one

asked by pooja on March 17, 2012
77. ## chemistry

What is the expected freezing point of a 3.50 m (m standing for molality)aqueous solution of BaCl2(Kfp= 1.86 degrees Celsius/m)? What is the expected boiling point(Kbp= 0.512 degrees Celsius/m)? which is effected to the greater extent, the boiling point or

asked by Patricia on April 7, 2013
78. ## trig

Solve the equation for cos theta-tan theta=0 for greater than or egual to zero but less than 2pi. Write your answer as a multiple of pi, if possible form the following choices: pi , 5pi A. --- ---- 4___ 4 B. pi 3pi 5pi 7pi ----- '----- '-----'----- 4_____

79. ## physics

A copper (Young's modulus 1.1 x 1011 N/m2) cylinder and a brass (Young's modulus 9.0 x 1010 N/m2) cylinder are stacked end to end, as in the drawing. Each cylinder has a radius of 0.38 cm. A compressive force of F = 6100 N is applied to the right end of

asked by S on November 12, 2014
80. ## math

Susie designed an excersise program for herself. One part of the program requires her to walk between 25 to 30 miles each week. She plans to walk the same distance each day five days a week. What is the range of miles that she should walk each day? Write

asked by robert on December 27, 2007
81. ## math

Which strategies can be used to solve this problem? Kathleen invited 28 people to her party. She plans to seat 8 people at the dining room table. She will put the rest at round tables with 4 people at each table. What is the fewest number of round tables

asked by April lanneau on March 8, 2019
82. ## Statistics

Solve this statistic question? A survey of 250 lobster fishermen found that they catch an average of 32.0 pounds of lobster per day with a standard deviation of 4.0 pounds. If a random sample of 36 lobster fishermen is selected, what is the probability

asked by Anonymous on June 7, 2018
83. ## math

I'm working on a project that says "a common bit of financial wisdom is that a car payment should be no more than 20% of your monthly take-home pay. Set up and solve an equation to determine how much you would need to be making in take-home pay each year

asked by Ariana on May 15, 2019
84. ## Math

Explain a real-world problem that you used math to solve. What mathematical expressions did you use in your problem solving? Define your variables and explain your expression. My real-world situation would be making a cake and converting the cups into oz.

asked by Stacy on April 20, 2014

book says: (4-4.00x + x^2)(6.00x10^-6C)= x^2(15.0x10^-6C) they got: 3.00x^2+ 8.00x-8= 0 I don't get how they got that quadradic equation. (I mulitplied over and then divided the 15.0x10^-6 over and I didn't get what the book got) (my problem that I'm doing

asked by ~christina~ on April 2, 2008
86. ## math

Which strategies can be used to solve this problem? Kathleen invited 28 people to her party. She plans to seat 8 people at the dining room table. She will put the rest at round tables with 4 people at each table. What is the fewest number of round tables

asked by ? on March 8, 2019
87. ## Geometry

Suppose a chord of a circle is 9 inches long and its midpoint is 6 inches from the center of the circle. Find the length of the radius. How in the world do you figure that out? You have a right triangle (centercircle, centercord, radius) You know two of

asked by Emily on March 13, 2007
88. ## Chemistry

Determine the mole fraction of acetone in a solution prepared by adding 0.456 kg of (CH3)2CO to 0.899 L of C4H8O. Molar Mass (g/mol) (CH3)2CO 58.05 C4H8O 72.12 Density (g/ml): (CH3)2CO 0.7899 C4H8O 0.8892 Name/Formula: acetone (CH3)2CO tetrahydrofuran

89. ## Chemistry

Use the periodic table to answer this question. A student dissolves 24.2 g of NaCl in 500 mL of water. Another student dissolved 24.2 g of KI in 500 mL of water. Why do the two solutions have different molarities? The volumes of the solutes differ. The

asked by Noah Love on June 24, 2016
90. ## Chemistry

In a mountainous location, the boiling point of pure water is found to be 95 degrees Celsius. How many grams of sodium chloride much be added to 1 kg of water to bring the boiling point back to 100 degrees Celsius? Assume that sodium chloride behaves

asked by Mike on September 14, 2010
91. ## Chemistry

1.What is the pH of a solution containing 0.042 M NaH2PO4 and 0.058 M Na2HPO4 ? The pKa of sodium phosphate is 6.86. pH = 6.86 + log [0.058] / [0.042]; pH = 6.86 + 0.14; pH = 7.00 That is my answer to the above question. The following question is what I am

asked by Blake on January 27, 2013
92. ## chemistry

1.Name the type of solution 45g of NaCl in 100g of water at 80 degree celcius. 2. 39g of NaCl in 100g of water at 80 degree celcius

asked by karthik on November 6, 2016
93. ## Analytical

Calculate the pH of 7.2 × 10-8 M HCl. Report your answer to the hundredths place. Next, What fraction of the total H in this solution is from the HCl? Report your answer to the hundredths place.

asked by Chris on September 27, 2012
94. ## College Algebra

Graph the inequality on the number line and then write it in interval notation. 12x+4(x-3)

asked by Anonymous on September 6, 2017
95. ## Physics

You are standing 7 feet from one speaker and 10 feet from another. Both speakers are producing the same sound. If the combined sound from both speakers is barely audible at your location, which of the following could be the wavelength of the sound? Choose

asked by Shae on March 3, 2018
96. ## algebra

For every dime spent, Sam receives 15 food pebbles to feed the animals at the zoo. Sam fed the animals a total of 135 food pebbles. Write and solve an equation to find the number of dimes Sam spent at the zoo.

asked by Regan on December 18, 2013
97. ## Precalculus

A movie theater charges \$ 8 for adults and \$ 6 for seniors. On a particular day when 336 people paid an admission, the total receipts were \$ 2598. How many who paid were adults? How many who paid were seniors? I got this two equation (8x+6y=2598 and second

asked by Lilo on February 1, 2016
98. ## Algebra

The depth of the water in Jeanne's hot tub varies directly with the number of minutes that the faucet is turned on. At 8.15 A.M Jeanne's started filling her circular hot tub with water. At 8.59 A.M there was a foot of water in the tub. When will the hot

asked by Jynessa on November 10, 2013
99. ## algebra. help!

1. 3x+10≥4 a. x≥-2 b. x≤ 2 c. x≤-2 d. x≥ 2 ** 2. The tennis team is selling key chains as a fundraiser. If its goal is to raise at least \$180, how many key chains must it sell at \$2.25 each to meet that goal? Write and solve an inequality. a.

asked by Hannah on October 27, 2014
100. ## chemistry

How much ethanol C2H50H in liters d = 0.789g/ml must be dissolved in water to produce 190.5 of 1.65M C2H50H? Molarity problem. My calculation 0.789g/ml x 1000ml/46.06 = 17.12M 17.12M = 190.05 x 1.66 17.12m = 314.325 x= 314.325/17.12 x=18.36 I am not sure

asked by Fai on August 11, 2012