# I need a step by step explanation on how to add these two equations 2x+3y=1 5x+3y=16 Subtract the first equation from the second. (Subtract left and right sides separately). This gives you 3x = 15 Then divide both sides by

21,613 results
1. ## Maths!

Find the sum of all multiples of 5 between 100 and 300 inclusive. Ans: 8200 I do not know how to do this. Really do appreciate step by step workings and explanation. Thanks!

2. ## Chemistry

Calculate the volume occupied by 10^22 molecules of a gas at 300K and 760mm pressure. Step by step explanation please.

3. ## Geometry

The sum of the angle measures of a polygon w/ "s" sides is 2880. Find "s" Please help with step-by-step explanation, so I can fully understand it. Thank you.

4. ## math

Consider the sequence of steps to solve the equation: 5(x - 3) = 7x 2 Step 1 ⇒ 10(x - 3) = 7x Step 2 ⇒ 10x - 30 = 7x Step 3 ⇒ 3x - 30 = 0 Step 4 ⇒ 3x = 30 Step 5 ⇒ x = 10 Identify the property of equality which yields Step 5. I'm thinking

5. ## chemistry

What is the percent ionization of a 1.38 mol/L weak acid if its Ka = 2.7 x 10-6? Answer to two (2) decimal places. I know what steps to use but have difficulty applying them to the quesiton Can someone please complete the question for me since there are

6. ## algebra

I need a step by step explanation/ answer plzzz Simplify the following radical expression sqrt 72x^13y^11/8xy^13

7. ## Algebra

Josephine solved a quadratic equation: (x+6)^2=49. Her work is shown below. Step 1: √(x+6)^2 = √49 Step 2: x+6 = 7 Step 3: x = 7−6 Step 4: x = 1 In which step did Josephine make an error? A- step 4 B- step 1 C- step 2 D- step 3

8. ## ALGEBRA HELP

When solving the equation, what property was used to go from step 3 to step 4? Step 1: -(2x+3= x-18 Step 2: -2x-3=x-18 Step 3: -3=3x-18 Step 4: 15=3x A)APOE B)SPOE C)MPOE D)DPOE

9. ## math

Consider the sequence of steps to solve the equation: 2(x − 4) + 6x = 9x − 10 Which step in solving this equation is justified by the Commutative Property of Addition? Given ⇒ 2(x − 4) + 6x = 9x − 10 Step 1 ⇒ 2x − 8 + 6x = 9x − 10 Step 2

10. ## math

Omar wanted to know if x−5 is a factor of the polynomial p(x)=x3−6x2−x+30. He applied the Factor Theorem and concluded that x−5 is a factor of p(x), as shown in the following work. Step 1: p(5)=53−6(52)−5+30 Step 2: p(5)=125−150−5+30=0 Step

11. ## algebra

write a function rule for the table. y= x -10, -7, -2, 6, 10 y -25, -19, -9, 7, 15 Can someone please show me step by step how to work this problem out step by step, I am so confused.

What is the angular momentum of a 2.5 kg uniform cylindrical grinding wheel of radius 19 cm when rotating at 1200 rpm? And how much torque is required to stop it in 5.7 s? Need help with step-by-step explanation.

13. ## Math

Davide wants to find the zeros of the polynomial p(x)=x3−2x2−9x+18. His work is shown below. Step 1: p(x)=(x+3)(x−3)(x−2) Step 2: x+3=0 x−3=0 x−2=0 Step 3: x=2, x=3, x=−3 Explain why Davide’s work shows that 2, 3, and −3 are zeros of p(x)

14. ## Quick math help

In which step below does a mistake first appear in simplifying the expression? 0.5(-12c+6)-3(c+4)+10(c-5) Step 1: -6c+3-3(c+4)+10(c-5) Step 2: -6c+3-3c-12+10(c-5) Step 3: -6c+3-3c-12+10c-50 Step 4: 7c-41 Please help me!!! Thank you!!

15. ## Help PLZ!!

consider the steps to simplify the expression. Which property is used to reach Step 3? Expression: -4 3 7 + 7 + (-3 4 7 ) Step 1: = -4 3 7 + (-3 4 7 ) + 7 Step 2: = -4 + (- 3 7 ) + (-3) + (- 4 7 ) + 7 Step 3: = -4 + (- 3 7 ) + (- 4 7 ) + (-3) + 7 Step 4: =

16. ## Chemistry

Octane has a density of 0.692 at 20degree C . How many grams of O2 are required to burn 17.0gal of C8H18 ? Step-by-step explanation much appreciated with as much detail as possible so I can understand. Thanks!

17. ## CHEM

The decomposition of nitrogen dioxide 2NO2-->2NO+O2 occurs in a two-step sequence at elevated tempatures. the first step lis NO2--> NO+O. predict a possible second step that, when combined with the first step, gives the complete reaction

18. ## math

the work of a student to find the dimensions of a rectangle of area 6 + 8x and with 2 is shown below: Step 1 6 + 8x Step 2 2(4) + 2(6x) Step 3 2(4+6x) Step 4 Dimensions of the rectangle are 2 and 4 + 6x In which step did the student first make an error and

19. ## Chemistry

Using the half- reaction method, balance the redox reaction shown below. (I-)+(Br2) ---> (IO3-)+(Br-) Step 1. Break the reaction into the two half reactions. Br2 ==> Br^- I^- ==> IO3^- Step 2. I will leave the first one for you to do. The second one is

20. ## math

An equation and the steps to solve it are shown below: 3x − one over two (8x − 2) = 4 Step 1: 3x − 4x + 1 = 4 Step 2: x + 1 = 4 Step 3: x + 1 − 1 = 4 − 1 Step 4: x = 3 Which step was the error made and why? Step 1, because incorrect signs have

21. ## Math

Can you please go step by step, Ill show what I did and you can correct me. The question is: a+a(x+1) My way: a+a(x+1) 2a(x+1) 2ax+2a Could someone please check over this and provide a correct answer and my error. Thanks in advance. a+a(x+1) does not equal

22. ## Geometry

Find the midpoint of the segment with the given endpoints. D(1, 2) and E(–3, 6) A. (–7, 10) B. (–2, 2) C. (–1, 4) D. (4, 64) Is it C? (step by step explanation please :3)

23. ## Geometry

The sum of the angle measures of a polygon w/ "s" sides is 2880. Find "s" Please help with step-by-step explanation, so I can fully understand it. Thank you. (^_^) \_♥_/

24. ## Math

April rewrote a quadratic function in vertex form. h(x)=5^2-30x+30 step 1 h(x)=5(x^2-6x+ )+30 step 2 h(x)=5(x^2-6x+9)+30-45 step 3 h(x)= 5(x-3)^2+15 In which step did they make a mistake? and how? Please help

25. ## Information Literacy

Please check my answer thank you. 1. Mary is documenting her sources. Which step of the research process is she on ? A. Step 3: Evaluating your sources B Step 5: Cite your sources X C. Step 4: Organize your information D. Step 2: Find and Retrive Materials

26. ## Equation from Three Points*HELP*

Write the standard equation for the circle that passes through the points: (0, 0) (6, 0) (0, - 8) You must include the appropriate sign (+ or -) in your answer. Do not use spaces in your answer. x 2 + y 2 x y = 0 HELP PLEASE I NEED STEP BY STEP

27. ## solving inequality

I have two problems that Im.. having a problem with. I would like an answer but with an step by step explanation, so i can do the other 20 that are due tomorrow... lol. 1. 3x - 8 > 10 2. -2x +7 ≤ 37

28. ## math

Tom is showing his work in simplifying (5.2 – 8.5) – 0.5 + 6.8. In which step did Tom make an error? Step 1:: (5.2 – 8.5) – 0.5 + 6.8 Step 2: 5.2 + (–8.5 – 0.5) + 6.8 (distributive property) Step 3: 5.2 – 9 + 6.8 Step 4: 5.2 + 6.8 – 9

29. ## Algebra

To solve the following system of equations by elimination, which step would best to perform first? 1/2a - 1/4b = 1 1/3a + b= 3 A. Add the two equations. B. Subtract the two equations. C. Multiply the first equation by 4. D. Divide the first equation by 3.

30. ## Math

I need help solving the problem not the answer. (Multiple Choice) The steps below show the incomplete solution to find the value of x for the equation 7x + 8 − 3x = −6 + 10: Step 1: 7x + 8 − 3x = −6 + 10 Step 2: 7x + 8 − 3x = 4 Step 3: 4x + 8 = 4

31. ## Algebra

Debbie finished her algebra test early so she decided to check each of her answers. After checking her answer to question #10, she realized she made a mistake in her solution. In which step does Debbie make her mistake? Original Equation: 2 + 3y = 5(y - 2)

32. ## math

Solving Equations with Fractions 1/2 x - 1/3 x = 7/3 solve for X i need help step by step process anyone?

33. ## chemistry

Calculate the pH of a buffer solution containing 1.0 mol/dm3 CH3COONa. I need a step by step solution and explanation. thank you

34. ## math,algebra II

I need someone to explain to me step by step the process of this problem its in my book as an example but i am not understanding it. Ive researched the explanation of the ECHELON METHOD...BUt i am not seeingit...this is the problem that they have: Use the

Can anybody tell me step wise step how to solve this quadratic equation? x^3-3x^2+4=0 Please tell me step wise step as i haven't solved such type of equations before. Thank You

36. ## math

can someone explain step by step to solve system equations and example ill show here 3x+4y=-2 x=-2y

37. ## Calculus--complex numbers

let z= a+bi be a complex number. it is given that the quotient (z-i)/(z-1) is purely imaginary. show that z lies on a circle and determine the centre and radius of this circle. OK, here's my working out...( i am using "X" as my times symbol) step1:

38. ## Algebra

Help PLZ. Which step could you use to start solving the system of equations below? x + y = 3 -3x - 2y = -7 Group of answer choices A. Multiply -3x - 2y = -7 by 2 and subtract it from x + y = 3 B. All of the above. C. Multiply x + y = 3 by 3 and add it to

39. ## MATH

Hannah is showing her work in simplifying (6.1 − 4.5) − 2.5 + 3.9. Identify any error in her work or reasoning. Step 1: (6.1 − 4.5) − 2.5 + 3.9 Step 2: 6.1 + (− 4.5 − 2.5) + 3.9 (associative property) Step 3: 6.1 − 7 + 3.9 Step 4: 6.1 + 3.9

40. ## algebra

I need a step by step explanation on how to add these two equations 2x+3y=1 5x+3y=16 Subtract the first equation from the second. (Subtract left and right sides separately). This gives you 3x = 15 Then divide both sides by 3. x = 5 Pretty easy, huh? After

41. ## Algebra 2

I need to know how to solve quadratic equations by factoring. Can you so a step by step explanation to this sample problem? 2 x -12x-28

42. ## algebra 1

ELEMENTARY ALGEBRA #3 Page 23 Chapter 3 Lesson 3.02 Solving Multi-step Equations Reading Assignment: Study pages 126 – 129 Written Assignment: There are five steps to solve Multi-Step equations, Match them in their proper order. Step 1 Undo

43. ## Math

I am really have a tough time trying to solve this problem. I think my first three steps are correct but I am not sure. Could someone please help me? I got lost somewhere on one of these steps. I thonk it was step 3, 4, 5. Thank you. The two numbers chosen

44. ## Algebra1

I am solving for linear equations and I'm wondering if I did Step 3 right.. 3x-y=8 x-y=8 Step 1 3x-y=8 3x-y+y=8+y 3x=8+y 3x/3=8+y/3 x=(8+y/3) Step 2 3(8+y/3)-y=8 8+y-y=8 8+2y=8 8+2y-8=8-8 2y=0 2y/2=0/2 y=0 Step 3 x=8+y(0)/3 x=2.6

45. ## Precalculus

This is for solving exponential/logarithmic functions: (This is a base e Logarithmic function I would assume): e^(4x)/10 =4^x-2 ? I understand the properties of logs for the most part, but I have a hard time figuring out the step-by-step process on how to

46. ## Math

William multiplied (-2x+1-3y)(-0.5x) and got the wrong solution. Review his work and identify the step in which William made his first error. Step 1 (-2x+1-3y)(-0.5x) Step 2 (-0.5x)(-2x-3y+1) Step 3 -0.5x(-2x)-0.5x(-3y)-0.5x(1) Step 4 x^2+1.5xy-x I think

47. ## Geometry

A parabola has a focus of F(2,8.5) and a directrix of y=9.5. The point P(x,y) represents any point on the parabola, while D(x,9.5) represents any point on the directrix. Maria was asked to use the distance formula to write an equation to represent this

48. ## Math/solving two-step equatios(distributive proper

Good morning! I am trying to help my nephew who because of seizures when he was younger has a hard time understanding math. I need step-by-step (written in words) on how to do two-step equations (distributive properties). 3(c+5)=12. 5(4d+8)=40. -(2k-11)=7.

49. ## Pre-calculus.

Wesley and Delia are playing a math game. Wesley gives Delia these step to follow. Step 1: Multiply a number by 6 and then subtract by 4. Step 2: Divide the result by 2 Step 3: Add 3 to the result from the second step. If Delia's final answer is 19, What

50. ## Chemistry

In a chain mechanism, a reaction in which two free radicals combine to form a stable molecule would be called the A) initiation step B) termination step C) propagation step D) inhibition step E) branching step

51. ## Calculus

Find a number, delta, such that if |x-2|

52. ## Algebra help

f(x)=x^3-4x^2-x+4 How do I find the x-intercept for this? This is from my book: step 1: 0=x^3-4x^2-x+4 step 2: 0=x^2(x-4)+(-1)(x-4) step 3: 0=(x^2-1)(x-4) I know how to solve once I get to step 3, but in step 2, I don't know what they've done or why. Where

53. ## math

An equation and the steps to solve it are shown below: 3x − one over two (8x − 2) = 4 Step 1: 3x − 4x + 1 = 4 Step 2: x + 1 = 4 Step 3: x + 1 − 1 = 4 − 1 Step 4: x = 3 Which step was the error made and why? Step 1, because incorrect signs have

54. ## aps

There are 26 step on flpor at the time saad comes down two step imad step up one step When will tyey meet at what step?

55. ## Math

In which step is the error? Step 1: Let x = 1 and y = 1. Step 2: By substitution xy = y^2. Step 3: Multiplying both sides by -1, -xy= -y^2. Step 4: Adding x^2 to both sides, x^2-xy=x^2-y^2. Step 5: Factoring, x(x-y)=(x+y)(x-y). Step 6: Dividing both sides

56. ## math/algebra

solve each of the following systems by substitution. 16) 5x -2y = -5 y - 5x = 3 20) 8x -4y = 16 y = 2x - 4 28) 4x -12y = 5 -x + 3y = -1 Step one: Solve on of the equations for one of the variables. y=2x-4 Step two:Substitute the expression for the variable

57. ## Chemistry

Using the change in oxidation number method, balance the redox reaction shown below. (NO2^2)+ (MnO4^-)---> (NO3^-)+ Mn^2+ Divide into half reactions. I will show you how to do MnO4^- and you do the other one. MnO4^- ==> Mn^+2 Step 2. Determine the

58. ## math

My problem I have involves a method that requires using the quadratic equations that comes from India. Here the problem that I have to solve : x to the second power plus 12x minus 64 equals 0 I need someone to walk me through each step to arrived to the

59. ## Math

2(5x + 1) = 3(3x + 7) a) x = 19 b) x = 20 c) x = 21 Can you please explain it step by step please? I don't get the question and I want some easy, thorough explanation with a through guide of what you're calculating. Thank you so much!

60. ## math

could i get a step by step explanation for factoring this trinomial? i don't seem to understand how to get the final answer as i always get 2x(x+2)+x+2 2x^2+5x+2

61. ## algebra

Hi I need help with this question. I am not asking for the answer because if not I wont learn like that. I am looking for a good step by step explanation. Thank you. Solve for x: 5x + 2 = 4x − 9.

62. ## 061689 bussines accounting and you

All i need detail how to do it i watch video but im not understanding if anybody have more specific explanation details Please help step by step what i need to do im so confused Thank you :)))

63. ## Chemistry

Write a procedure to demonstrate the effect of higher concentrations of HCl on its rate of reaction with antacid tablets. I have HCl with a concentration of 1.0 mol/L. This is what I have so far. Are my concentrations correct for this procedure? E is my

64. ## CALCULUS

Find a formula for the inverse of the function. y=x^2-x, x>=(greater than or equal to) 1/2 Please give me a step by step explanation. I think my algebra is wrong... Ty

65. ## Physics

Can someone please show me step by step how to normalize e^-5x in the interval (0, infinity)? I have read a lot of different books etc but need it explained to me in plain English or showed to me step by step because I am just not getting it. Thank you

66. ## chemestry

Balance th following equation in acid Solutiong and determind if it is spontaneous under standard conditions. NO3^-1 + Sn^+2 ---> NO + Sn^+4 balanced directed to first post. You need to calculate the E value to determine if it is spontaneous or not. Please

67. ## Math

Stupid question time. I need to figure out how to rearrange equations to solve for x in my chemistry homework, which involves putting equations in quadratic form first. But I can't for the life of me remember how to "rearrange" them correctly. So what in

68. ## Algebra

We're doing multi-step equations, and I need help on how to check my answers? I knew how to do it on two-step equations, but now it's kind of confusing? for example, there's a problem, 6a-1 over 7 = 1 My answer was 4/3. We're supposed to insert our answer

69. ## math algebra three system equation

2x+y+2z=25 3x-y+6z=48 5x+2y+4z=55 I got stuck after step 2 of trying to eliminate the first two equations where do I go from their and would kindly like full explanation of how to solve it so I can practice it out. Thank you :)

70. ## English

You need spaghetti, two bulbs of garlic, two red chillis, salt and olive oil to make spaghetti aglio e olio. Step 1: Boil the water in a pot and add spaghetti and salt. Step 2: Cut a red chilli into pieces on a chopping board. Step 3: Add olive oil, red

71. ## geometry

The figure shows some of the steps Jane took to draw a line segment parallel to line segment XY at R. Jane plans to perform these steps next. Step 1. Set the compass at point S and adjust its width to point T Step 2. Fix the compass at point L. Step 3.

72. ## algebra

So im struggling in math right now and i need help to do this can anyone please explain step by step on how to do this its solving systems of equations by substitution 5x-4y=-23 y=1/3x-5

73. ## Algebra 2

V=df-di/tf-ti; solve for ti Literal equations! I would really appreciate it if you posted the step by step procedure of this problem so I can understand it! Many thanks!

74. ## algebra

please giveme step by step instructions on how to solve linear equations. -x+4y=9 and x-y=3 . I am trying to plot the coordinaces.

75. ## L Pre-Cal

Hey! I'm getting stuck on how to solve this system of linear equations. Can anyone show me step by step Thanks! 3x-5y+5=1 5x-2y+3z=0 7x-y+3z=0

76. ## algebra

please give me step by step instructions on how to solve the following equations; x-y=3 and -x+4y=9 I am trying to graph the coordinates.

77. ## Algebra

Can you please give an example step by step of how to solve a system of linear equations in three variables?

78. ## Math; Pre- Algebra

I neede help with how to solve equations with variabls on both sides. Can you give me some examples and work them out step by step?? Please!! :D

79. ## Algebra 1

11n+23=3n-13+84 Solving multistep linear equations If someone could show me step by step how to do this it would mean alot god bless!

80. ## Discrete Math - Geometric Vectors

I'm lost! How do you add the following vectors? Please provide a step by step answer! 1) EA - CB + DB + AD 2) PT - QT + SR - SQ

81. ## math

Solving Equations with Fractions 3m/5 - 1/2 = 7/10 solve for M i need a step my step process. i need help.

82. ## Algebra 1

Can I also get some help with this two step equation as well? 3/2x - 4 = 16 I don't quite understand two-step equations that has fractions

83. ## absloute values

A partial solution to I1-xI-3 =- 1 is shown below. Step A I1-xI-3 =- 1 Step B I1-xI = 2 Step C 1+x=2 or -1+x=2 Step D x=3 or x-1 Where was the first mistake made if there is one?

84. ## ChemistryDrBob222

Arrows disappeared from below added them back to the equations. The decomposition of IBr(g)into I2 (g) and Br2 (g) is first order in IBr with k = 0.00255/sec. (a)Starting with [IBr] = 1.50M, what will [IBr] become after 2.50 minutes? (b)How long, in

85. ## math

the total length of 2 ropes A and B is 7.23 m. the total length of 2/5 of Rope A and 3/4 of Rope B is 3.97 m. Find the length of Rope A.(Skill: equations) (step by step and give explanation if can)

86. ## Chemistry-DrBob222

Arrows disappeared from below added them back to the equations. ??(a) I don't understand ln(No/N)=akt Is (a) -3.77 The decomposition of IBr(g)into I2 (g) and Br2 (g) is first order in IBr with k = 0.00255/sec. (a)Starting with [IBr] = 1.50M, what will

87. ## ChemistryDrBob222

Arrows disappeared from below added them back to the equations. ??(a) I don't understand ln(No/N)=akt The decomposition of IBr(g)into I2 (g) and Br2 (g) is first order in IBr with k = 0.00255/sec. (a)Starting with [IBr] = 1.50M, what will [IBr] become

How do you solve this equations? (xy^-3)^-5 (3x^4)(4x^12) ab^-6 ______ c^0d^-4 x^3y^0(z^-4) Can you please show it step by step? Thanks.

89. ## Algebra 1

can I have a list of linear equations with it being solved step, by step???? I NEED HELP!

90. ## english!

Make sure you understand the topic(s) is a step in the research process. (A) This step needs to be done as soon as your research is completed. (B) This step is the last step in the research process. (C) Always ensure you grasp the topic before you go to

91. ## Algebra II

The question reads: Use synthetic division to find P(2) for P(x) = x^4 - 8x^3 - 8x^2 - 10x - 2 I have no idea how to do this problem. Could someone give me a step by step explanation or link me to somewhere I can find out how?

92. ## Math

Factor: 50 (2x-5)^2 -162 (3y-2)^2 I'm not even sure how to do this. I've tried it for so long and I've been trying multiple ways. I don't know how to factor these. May I get a step to step explanation or work please?

93. ## Chemistry

Consider the following problem: Target: 2NOCl(g) ? N2(g)+ O2(g)+Cl2 (g) ?Hrxn= ? Steps: 1. 1/2 N2(g) + 1/2 O2(g)? NO(g) ?H= 90.3 kJ 2. NO(g) + 1/2 Cl2(g) ? NOCl(g) ?H= -38.6 kJ As you determine the ¥ÄHrxn value for the target equation above, what must be

94. ## Chemistry Urgent

Consider the following problem: Target: 2NOCl(g) ? N2(g)+ O2(g)+Cl2 (g) ?Hrxn= ? Steps: 1. 1/2 N2(g) + 1/2 O2(g)? NO(g) ?H= 90.3 kJ 2. NO(g) + 1/2 Cl2(g) ? NOCl(g) ?H= -38.6 kJ As you determine the ¥ÄHrxn value for the target equation above, what must be

95. ## Math

I am currently doing a question in which the equation is dN1/dt= -N1 + 0.1N1*N2 However, I am able to follow until the step of -N1(1 - 0.1N2) after that I'm not able to follow to the step of (-1)N1 (1-N2/10) Can someone please explain to me how we went

98. ## Urgent math

so I tried to expand this question and I got x^3 *x2, i don't know if it's right but if not can I get a step by step explanation please, Expand (2x + y^2)^5. (Simplify your answer completely.)

99. ## algerbra

solve the equation step by step list each step along with the property you used during that step -5*1*11*4

100. ## pre algebra

solve the equation step by step.list each step along with the property you used during that step. -5 x 1 x 11 x 4