# 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 77
1. ## Chemistry

I am sooo confused on how to solve this problem, can anyone help me understand? calculate the pH of 0.10 M HCI solution?

asked by Jessica on October 1, 2009
2. ## 7th grade math

Solve the inequality then graph the solution set on real number line. (2/5x)>7 2(x+7)-4>5(x-3)

asked by jerry on May 27, 2014
3. ## Algebra

|x+9| is greater than or equal to 0. Solve and graph the solution set on a number line.

asked by Anonymous on March 19, 2010
4. ## algebra

Solve the equations by finding the exact solution. a 3= x -3 what is x b In e = In like a check mark 7 with a 6 under the 7 -3 In e x is what Thank you very much for your time

asked by Mary Ann on May 29, 2014
5. ## algebra

solve x^4-8x^3+64x-105=0 given that 2-i is one solution. must be tired cause my steps are not calculating correctly

asked by student on June 24, 2013
6. ## Math

3. Explain how you can tell if an equation has no infinite solution, write an example and solve. I don't understand how you can tell, help?

asked by Ana on November 13, 2017
7. ## Math

1. Solve each inequality and express the solution set in interval notation. a. 3 < |(x-3)/2| < 5 b. 5 ≥ |(x+2)/3| > 1 2. 4 < 2x-8 ≤ 10 ans.: (a)(9,-3) (-7,13) (b) [-17,13] (1,-5) 2. (6,9]

asked by NR on October 30, 2016
8. ## Chemistry

The pH of a solution prepared by mixing 325 mL of 0.25 M NaOH and 675 mL of 0.20 M HClO3 is 6.50. Solve for Ka.

asked by Snoop Lion on January 29, 2014
9. ## Math

Solve each inequality and express the solution set in interval notation. a. 3 < |(x-3)/2| < 5 b. 5 ≥ |(x+2)/3| > 1 ans.: (a)(9,-3) (-7,13) (b) [-17,13] (1,-5)

asked by NR on October 30, 2016
10. ## algebra

This is how my book shows it, but I don't know solve the equation by factoring 35-x^2+2x=0 x^2 x^2 35+2x=x^2 -2x=-2x 35-35=x^2-2x-35 0=x^2-2x-35 (x-7)(x+5) (x-7)(x+5) x-7=0 x+5=0 x=7 x=-5 (7)^2-2(7)-35 -5^2-2(-5)-35 49-14-35 25+10-35 0 0 Solution set is

asked by Lisa on March 21, 2008
11. ## Algebra 2

what is the solution of the equation 8=(x-3)^3/4 It's not making sense I try to solve it but I don't get 8. below are the plug in choices. 16 13 19 11

asked by bubble dragon on May 15, 2016
12. ## MAth

I keep getting -28/19 for this problem, but it doesn't check with the solution in the back of the book. Help please.. solve the equation 7d-(1/2)(2d-4)=(-5/4)(d+4)

asked by Anonymous on September 6, 2012
13. ## algebra (inequalities)

solve the inequality, if possible. -2x-n+n then tell what type of equation it is. it is either x># (or a variation of this), all real numbers, or no solution.

asked by Bri on January 7, 2011
14. ## ALGEBRA 2

Solve the compound inequality.

asked by Anonymous on October 9, 2014
15. ## algebra

solve the inequality and write the solution set using interval notation. 4x+7

asked by Anne on September 15, 2012
16. ## Calculus

Solve the differential equation by using Laplace transforms. Find the particular solution that satisfies them of: y''+2y'+y =4e^(-t)

asked by Elyse on July 27, 2013
17. ## chemistry

What is the concentration when 60.0 mL of a 9.00 M HCl solution is diluted to 1.170 liters? and how do you solve this problem?

asked by katie on April 4, 2013
18. ## Algebra

Could someone please help me with this problem? Solve using the multiplication principle. Don't forget to check. -z=35. The solution is z=

asked by B.B. on February 22, 2010
19. ## Math

Solve the inequality. Other than , graph the solution set on a number line. 12x - 3 > 3(3x - 9)

asked by DK on March 8, 2010
20. ## intergrated math

Solve the equation for x. Write the solution set 3x2 + 5x2 – x – 7x2 = 0

asked by aj on May 17, 2011
21. ## maths

x^4+3x-2/(x^2+1)^3(x-4)=(Ax+B)/(x^2+1)+(Cx+D)/(x^2+1)^2+(Ex+F)/(x^2+1)^3+H/(x-4)+G/(x-4)^2.find ABCDEFGH?plz solve it a partial fraction i serious need the solution urgently

asked by anthony on July 28, 2015
22. ## math

solve the follow inequality. write your solution in interval notation. x^3-49x¡Ü0

asked by ladybug on October 1, 2012
23. ## pre-calculus

solve for the follow inequality. write your solution in interval notation. x^3-49x¡Ü0

asked by ladybug on September 30, 2012
24. ## calculus

solve the following inequality. write your solution in interval notation. x^3+9x^2-108 less than or equal to 0

asked by Crystal on December 22, 2012
25. ## Calculus

Solve the differential equation. t(dy/dt) + 2y= t^3 t>0, y(1)=0 I think I solved it properly, I'm just trying to check my final solution.

asked by Rachel on February 15, 2011
26. ## algebra

solve the inequality, if possible. -2x-n+n then tell what type of equation it is. it is either x># (or a variation of this), all real numbers, or no solution.

asked by Bri on January 7, 2011
27. ## Math

I am solving inequalities then graphing my solution. in a problem such as -2(c-1)

asked by Christina on May 1, 2011
28. ## Algebra

Solve the compound inequality.

asked by Anonymous on October 9, 2014
29. ## Math

Hi. please help me solve the ffg. differential equation: D^2y=3sinx-4y given y=0 and dy/dx=1 at x=pie/2 Need full solution. Tx

asked by Ash on February 27, 2013
30. ## Math

Given that dy/dx = μ(ax+by+c), where μ is an arbitrary function and a,b,c are constants. Find the solution of the differential equations. Hence and otherwise, solve dy/dx = (x+y+1)² - 2

asked by Naf on February 21, 2019
31. ## chem

Can someone help me I need to find out how to solve the following equation What is the PH/POH of a .0727m H3O+ Solution at 25 degrees c

asked by Help on April 28, 2010
32. ## pre-calculus

please help me with thisone thanks solve the inequality algebraically. Express the solution in interval notation. (x-8)^2/x^2-36 > 0

asked by dave on March 1, 2011
33. ## math,help

can someone help me with this i am lost now i've been doing math for the past 8 hrs. Problem # 1 solve: 4(x-10)-3x=x-40 Problem # 2 solve for t: a = p + prt Problem#3 translate to an algebraic equation 7 less than the quotient of a number and 3 is twice

asked by jasort20 on March 18, 2007
34. ## Algebra 1

How to factor 10k^2+35k+15 completely? I would start with the easy: factor five out. 5(5k^2 +7x +3) Now the three tells you that the factors are probably 3,1 and the five tells you that the factors are probably 5,1 5(5k+3)(k+1) wrong, wont work and

asked by Montie on March 31, 2007
35. ## chemistry

Calculate the concentrations of all species in a 1.67 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10–2 and Ka2 = 6.3× 10–8. I know how to find the Na^+ and SO3^-2 but I don't know how to find

asked by Johnny on June 17, 2012
36. ## math

Create your own word problem that uses a system of equations to solve. Your problem must include the following words: beach,hammock,dance,and troll.

asked by Nick on February 24, 2011
37. ## Physics

The motion of a block-spring system is described by x(t) = A sin(ùt). Find ù, if the potential energy equals the kinetic energy at t = 6.11 s. I'm really not sure how to solve this. It seems that you need more information, either x or A? I appreciate any

asked by Bruce on July 13, 2012
38. ## alg2 check?

Graph the system of inequalities then substitute the (x,y)order pair into both inequalities. y>3x+1 y

asked by tyneisha on July 18, 2013
39. ## Grammar

Circle the nouns that can be used with the verbs on the right . Engine-consumption-dependence (reduce) Answer : consumption and dependence Solution-dependence-alternative (find) Answer:solution and dependence Resources-technology-stocks(deplete)

asked by Maryam on June 6, 2013
40. ## MATH HELP

Solve the following system of equations: x − 2y = 6 2x − 4y = 10 Infinitely many solutions No solutions (0, 0) (6, 10) is it A

asked by Oscar on December 21, 2015
41. ## algebra 2

Use substitution to solve the system 3x + 7y = −3 (1) 7x + y = −53 (2) Find the value of x. (part 2 of 2)Find the value of y.

asked by briana on February 17, 2011
42. ## Math

Use linear combinations to solve the system of linear equations. 5x=4y-30 2x+3y+-12

asked by Sarah on January 18, 2011
43. ## math

PLEASE!!!!i need help on these 4: *4y=15-3x 2y=3x+21 *4x=5y-14 y=-6x-9 *5x=4y-30 2x=3y=-12 *2/3y=10+4x 5x=1/3y-8 use linear combinations to solve the system of linear equations thank you!!!

asked by HELP me please asap!! on January 24, 2011
44. ## algebra

Need help with this problem 8x-5y=20 5y-8x=-20 Please help me with this problem Solve the system of equations by graphing.

asked by jspurlock on April 5, 2009
45. ## math

PLEASE!!!!i need help on these 4: *4y=15-3x 2y=3x+21 *4x=5y-14 y=-6x-9 *5x=4y-30 2x=3y=-12 *2/3y=10+4x 5x=1/3y-8 use linear combinations to solve the system of linear equations thank you!!!

asked by HELP me please asap!! on January 24, 2011
46. ## Math

use linear combinations to solve the system of linear equations. 2x+y=4 x-y=2

asked by Crystal on February 6, 2008
47. ## algebra 2

How does writing equivalent equations help you solve a system of equations?

asked by cj on September 25, 2015
48. ## Math logs

Solve the system of equations: y= (lnx)^2 + 2 (lnx^2) y = 3ln(1/x^2)+24 Im not sure what to do..

asked by Mike on October 14, 2009
49. ## math

solve the system in interval [o,2π): y=sin^2(x)+cos^2(x) or x+π=cos^-1(y)

asked by KCS on July 13, 2011
50. ## AP CHEM

Please help me with thses AP CHEM homework problems and show the steps to how to find the solutions: Solid Liquid Titrations: Determine the concentration of the indicated liquid unknown given the mass of a solid standard and the buret data for the

asked by shylo on July 31, 2008
51. ## Math

The measure of (Angle)D is 5 times the measure of (Angle)E. The two angles are supplementary. Find the measure of each angle. My Method: x+x*5=180 I tried this but it didn't work, any correct steps?

asked by Katelyn on November 13, 2017
52. ## math

Loan Amount: \$15,000 Method of payment: discount basis Amount of Interest : \$650 Term of loan: 1 year Effective Rate of Interest (to the nearest tenth): I tried to work this out but I got it completely WRONG !!

asked by sarah on July 10, 2013
53. ## chemistry.

They are__________Mol of carbon atoms in 4 mol of Dimedthysulfoxide A: 2 B: 6 c: 8 D: 4 E: 3 My answer is C:8 but can any one help me with the method to show the right answer. 2. There are ___________Sulfur atoms in 25 molecules of c4H4S2. My answer is

asked by Richard on September 12, 2009
54. ## science

Are there any websites that explain Mendelian genetics and show how to solve such problems in an easy, concise manner at an AP Bio level? Thank you

asked by Jason on March 18, 2015
55. ## Math

How do I show that the sum of 3 consecutive odd integers is a multiple of 3? Can you please help me answer this question? My teacher didn't explain on how to solve it very well.

asked by Anonymous on September 18, 2016
56. ## mathematics

show step solve the Sturm Liouville problem Y"+hY=0, NB: h means lambda y(0)+y'(0)=0 y(1)+3y'(1)=0 obleck plz explain better again or damon can you help

asked by luis on February 8, 2019
57. ## Someone Please Help me- PreCalc

Determine the missing coordinate of the point (4/7,y) that lies on the graph of the unit circle in quadrant IV. Please show the steps because I need to solve more. Thank you.

asked by chizoba on July 24, 2016
58. ## Mathematics

How do i solve the pair of simultaneous equations y=x^2-3x-12 and y=2x-16 and epxress y=x^2-3x-12 in the form y=(x-h^2)+k, where h and k are constants Hence determine the minimum value of the function y=x^2-3x-12 I have a few of these to do, so if someone

asked by Raquel on June 25, 2009
59. ## Math

Note: Enter your answer and show all the steps that you use to solve this problem in the space provided. Find the function rule. [x| -2| -1| 0| 1| 2] [y| 9| 4| -1| -6| -11] PLEASE HELP!!!

asked by you know it on March 13, 2019
60. ## Algebra

Linear Equations (solve for y to put it into slope intercept form...y = mx+b). Are these 2 correct, please show me what I did wrong if not, thank you... A) y-5 = -2(x-3) y-5 = -2x+6 (add +5 to both sides) y = -2x+11 B) if m = -2/1 = -2 y-0 = -2(x+4) y =

asked by KERN1 on October 21, 2016
61. ## Engineering

What is the critical buckling force that will buckle a 9 foot tall 2 x 4 (K = 1.0)? Please show how to set up the problem and the steps to solve. I do not understand. Thank you.

asked by Nabil on September 29, 2013
62. ## CHEMISTRY

Calculate the volume of 0.6M HNO3 necessary to neutralize 28.55 cm3 of 0.45M KOH. PLEASE SHOW ME STEPS SO THAT I CAN UNDERSTAND HOW TO SOLVE THIS PROBLEM. THANK YOU.

asked by jj on March 15, 2009
63. ## Algebra

I don't understand how to do this problems: Solve for the variable r, C=2PIr (PI is the pi symbol thing then r is next to it) and this problem solve for the variable l, S=B+1/2Pl please help :) When you solve for a variable, you want that "letter" on one

asked by Avalon on November 18, 2006
64. ## Chemistry

A buffer system contains 0.25M NH4+ and 0.19M NH3. pka of NH4 is 9.25. How many moles of NaOH must be added to 1.00L of this solution to increase the pH to 9.25?

asked by June on July 19, 2012
65. ## Physics (URGENT!)

-vehicle 1: 2,060lbs -vehicle 2: 5,800lbs -both roads are 45mph -The cars were impacted at right angles -roadway was dry, 69 degrees -friction between tire & road: .60=mu -skid marks (PRIOR to impact): v1=20ft, v2=7ft. *you can find the entire problem w/

asked by Esora on January 18, 2011
66. ## Science

Which statement is true of an organ system? A. It supports all part of the organism. B. it is not necessary for the survival of the organism. C. One organ system can take over for another organ system. D. It has no connection with other organ system in the

asked by Daisy on February 17, 2015
67. ## PHYSICS

Kinetic Energy and the Work/Energy Theorem: 1.) How much kinetic energy does a 700-gram baseball have that is travelling at 20 m/s? What would be the kinetic energy if you doubled the mass? What would be the kinetic energy if you doubled the velocity?

asked by S.A on March 21, 2016
68. ## Algebra

1.What is the sum of 5/6 + 2/3? (1 point) MY ANSWER C. a.1 1/3 b.1 1/2 c.1 2/3 d.1 3/4 2.Sue needs 2 1/3 cups of flour for a batch of cookies.How many complete batches can she make with 10 cups of flour? (1 point) MY ANSWER D. a.5 batches b.3 batches c.2

asked by CassLovesCandyXD on September 22, 2015
69. ## Physics(Please respond)

1) A roller coaster (398 kg) moves from A (3.82 m above the ground) to B (29.4 m above the ground). Two non-conservative forces are present: friction does -1.82 x 104 J of work on the car, and a chain mechanism does +5.49 x 10^4 J of work to help the car

asked by Hannah on June 3, 2012
70. ## math

how do you write a system of equation that is linear ? can this two equation work? 2x – 3y = –2 4x + y = 24

asked by TD on April 3, 2015
71. ## Science

We think of our muscular system as the system that helps us move around. It also functions on an internal level by helping food movement in the ___________ and ____________, both parts of the digestive system. A) stomach; liver B) stomach; pancreas C)

asked by Carol on March 28, 2018
72. ## science

A lab technician adds 0.035 mol of KCl to 1.00 L of 0.0050 M Pb(NO3)2. Ksp = 1.7 × 10–5 for PbCl2. Which of the following statements is correct? a) Lead chloride precipitates until the solution is saturated. b) The solution is unsaturated and no

asked by michelle gloska on May 9, 2017
73. ## trigonometry

1) Find the exact value of the expression: tan−1(tan(−120651/47π))... How do you find Tan(-120651/47pi)? I don't know how to find exact values, if it's not a recognizable value. 2)Find a simplified expression for tan(sin−1(a/5))... Because tan = y/x

asked by Dan on May 3, 2015
74. ## Math

Hello, I need to use a matrix to solve this but am stumped on how to do it. All I need is a little nudge to push me in the right direction. Please help. Thank you You have been hired as a consultant for Crazy Al’s Car Rentals, a new car rental agency in

asked by Andres on September 30, 2015
75. ## calculus

A research chemist has two different salt water solutions. Solution 1 is 25% salt and solution 2 is 20% salt. She wants to have 1 liter of 22% solution. How much of each solution should she mix together to get the desired solution?

asked by Anonymous on January 25, 2018
76. ## human resources

A truck costing \$25,000 with a residual value of \$5,000 was purchsed by Rim Corporation. The truck's estimated life is 10 years. At the end of Year 2,what is the book value using declining-balance method? assume a depreciation rate of twice the

asked by shawn on March 12, 2012
77. ## business math

A truck costing \$25,000 with a residual value of \$5,000 was purchased by Rim Corporation. The truck’s estimated life is 10 years. At the end of Year 2, what is the book value using declining-balance method? Assume a depreciation rate of twice the

asked by tracie on September 1, 2012
78. ## Math

We first note how the polynomial in the previous exercise can be written in the nested multiplication method: 8 + x(−10 + x(7 + x(−2 + x(3 + 12x)))). Using this representation, the following pseudocode procedure (implementing Horner’s method) can be

asked by Darah on May 8, 2013
79. ## Math

A truck costing \$25,000 with a residual value of \$5,000 was purchased by Rim Corporation. The truck’s estimated life is 10 years. At the end of Year 2, what is the book value using declining-balance method? Assume a depreciation rate of twice the

asked by Anonymous on May 1, 2014
80. ## physics ( disregard last post)

hey bob, this question average force of friction thanks a lot. i only don't get one part. Now, set the potential energy of the rubber band (stretched x cm) equal to the work done on friction. does it matter how much i stretch it and what does it mean when

asked by James on June 12, 2007
81. ## business

i have a problem with this question my teacher gave me. i don't know what to write for the answer. the problem: there is a girl named Jane who is hired as the head of the payroll department at R& S Electronic company, firm of 75 employees. she is hired by

asked by jack smith on August 22, 2011
82. ## precalculus

write the expression as a sum or difference of logarithms. express powers as factors show all work log4 sqrt pq/7

asked by Sara on January 9, 2012
83. ## 5 th grade

What is the median fo the following set of numbers? 404,650,585,435,680,342,798 please! show me the work. thank you!

asked by pat on November 2, 2010
84. ## triggggggg

Find the vertex and axis of symmetry of y = -2x^2 + 4x + 1. Show all of your work and justify your reasoning. Note: The ^ symbol means to the power.

asked by cheyanne marie on April 17, 2012
85. ## physical science

A 65 kilogram person stands on a diving board 15 meters above the water. figure the GPE. show formula and work

asked by Alexis on September 18, 2011
86. ## Math

If log c = -399.699, give the value of c in scientific notation without using any calculator. Show your work. hint: the value of c is small but it does not equal to zero

asked by Larin on February 13, 2017
87. ## pre-calc

A statement Sn about the positive integers is given. Write statements Sk and Sk+1, simplifying Sk+1 completely. Show your work. Sn: 1 ∙ 2 + 2 ∙ 3 + 3 ∙ 4 + . . . + n(n + 1) = [n(n + 1)(n + 2)]/3 Sk: 1 ∙ 2 + 2 ∙ 3 + 3 ∙ 4 + . . . + k(k + 1) =

asked by Ciara on April 16, 2015
88. ## algebra 2

A car is traveling at 40 mph. The radius of its wheels are 14 inches. How many revolutions per minute? Please show work. I don't understand this.

asked by Harper on January 26, 2018
89. ## CALC

can someon help me find the horzontial and verticle asymptotes for x square root 4-x^2. For HA someone told me none but I dont understand how and is the VA -2 and 2. Please help and show all work Thank you

asked by Amber on July 5, 2017
90. ## triggggggg

Find the vertex and axis of symmetry of y = -2x^2 + 4x + 1. Show all of your work and justify your reasoning. Note: The ^ symbol means to the power.

asked by cheyanne marie on April 17, 2012
91. ## Chemistry 2

How many grams of nickel metal are plated out when a constant current of 15.0 A is passed through aqueous NICl2 for 60.0 minutes. Show all work. Please help!

asked by Ashley on December 4, 2012
92. ## Algebra 2

A coin is tossed three times. Find the probability of each event. a) at least two tosses come up tails. b) at least one toss comes up heads. PLEASE SHOW ALL WORK!

asked by Trisan on December 9, 2009
93. ## Algebra 2

Find the coefficient of the indicated term in the expansion of the given power of a binomial. Identify the missing exponents. (x^7y^2);(x+y)^? Please show work I need to learn how to do it.

asked by Genesis on December 17, 2014
94. ## math

The area of a parallelogram is 420 centimeters squared and the height is 35 cm. Find the corresponding base. Be sure to show all work and label your answer

asked by Shelby on May 4, 2013
95. ## Trigonometry

Sketch the graph of the function (Include two full periods. Find one complete cycle. Show your work. y=-3+5cos πt/12

asked by Bre on September 29, 2017
96. ## Trigonometry

Sketch the graph of the function (Include two full periods. Find one complete cycle. Show your work. y=sin4x

asked by Bre on September 29, 2017
97. ## Algebra 2

A coin is tossed three times. Find the probability of each event. a) at least two tosses come up tails. b) at least one toss comes up heads. PLEASE SHOW ALL WORK!

asked by Trisan on December 9, 2009
98. ## Probability & Stats

An experiments consists of tossing 4 coins successively. The number of sample points in this experiment is a. 16 b. 8 c. 4 d. 2 Please show work and why it is the answer! Thank you!

asked by Logan on October 31, 2016
99. ## Physics

William Tell fired an arrow with a velocity of 100 m/s at an angle of 30˚. How long will it take to reach its highest point? Please show work

asked by Lynn on June 25, 2013
100. ## Chemistry

Please help me with the following question: Consider the following ion; XF2-2 What is the oxidation number assigned to element “X”? Show your work I'm having trouble writing the steps.

asked by Amanda on June 17, 2011