# 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 604
1. ## Word Problems-Math

Please help with my word problems? Solve the problem. The rabbit population in a forest area grows at the rate of 6% monthly. If there are 260 rabbits in April, find how many rabbits (rounded to the nearest whole number) should be expected by next April.

asked by Stacey on October 23, 2007
2. ## Math

Show that the angle between the vector joining (a, b, c) and (b, c, a) and the vector joining (a, b, c) to (c, a, b) is equal to π/3

asked by Monica on October 12, 2010
3. ## math- calculus

You will often see proj (Vector a onto Vector b) written as projb⃗ a⃗ .Show that projb⃗ a⃗ =(a⃗ ⋅b⃗/ b⃗ ⋅b⃗ )*b⃗ .

asked by anon on February 26, 2014
4. ## algebra

i have no less than 6,000 to spend and no more than 10,000 write an inequality to show how much I have to spend

asked by charlyn on February 13, 2010
5. ## Calculus length of curve

Hi--can anybody show me how to do this? Find the length of the curve r(t)= (sqrt2)i + (sqrt2)j + (1-t^2)k from (0,0,1) to (sqrt2, sqrt2, 0). Thank you!!!!!!!

6. ## Calculus

show that the tangent to the curve f:f(x)= x^2-x at the point p1(0,0) is perpendicular to the tangent to the curve at p2(1,0)

asked by Anonymous on February 3, 2013
7. ## Vectors Math

You will often see proj (Vector a onto Vector b) written as proj b⃗ a⃗ .Show that projb⃗ a⃗ =(a⃗ ⋅b⃗ b⃗ ⋅b⃗ )b⃗ .

asked by Arashvir on February 22, 2015
8. ## calculus1

who can show me step by step on how to differentiate f(x)= (-x^2-1)/(x^2-1)^2. please do so. The answer must be f'(x)=(2x^3+6x)/(x^2-1)^3 or it is a wrong answer

asked by john on December 16, 2017
9. ## Linear Algebra

a) Show that if A has a row of zeros and B is any matrix for which AB is defined, then AB also has a row of zeros.

asked by Sarah on April 7, 2010
10. ## number theory

give an example to show that a^2 congruent to b^2 mod n need not imply that a congruent to b mod n.

asked by Laura on April 18, 2009
11. ## math

how do you show that lim((e^(h)-1)/h)=1 as h approches 0 given the series e^x= 1+x+(x^2/2!)+(x^3/3!)... And given F(x)=e^x how do you find the lim((f(x+h)-f(x))/h)as h approches 0

asked by alex on February 24, 2009
12. ## English

1. Time is up. 2. Time is over. 3. Time is finished. 4. Time is off. =============== At the end of a talk show, what can an MC say?

asked by rfvv on September 6, 2015
13. ## Math

Please show the steps of 2209^1/2 or steps of square root of 2209?

asked by Sonny on September 28, 2010
14. ## Differential Calculus

use the rule that says limit of (e^h - 1)/h = 1 as h approaches 0 to show that the limit of [ln(x+h)-lnx]/h as h approaches 0 = 1/x, where x>0

asked by Kristen on November 7, 2008
15. ## Algebra

Can you please show me step by step to the answer you have given me. -1/4(8x+2). I still do not understand how you came up with the answer. Thank yooi

asked by Theresa on January 27, 2013
16. ## math

caculate the following fractions 1/3+ 2/3+ 5/3 what is the answer to these fractions and show houw you get the answer. please.

asked by Dana on October 25, 2012
17. ## math

how do you simplify cos(A+B)*cos B=sin(A+B)*sin B can you show me the steps? thank you very much!!!

asked by candybar on February 9, 2011
18. ## calculus

Let g(x)=f(2x). Show that the average value of f on the interval [0,2b] is the same as the average value of g on the interval [0,b]. Please explain how this problem is done!!!

asked by Buddy the Elf on January 18, 2012
19. ## math

Show that any positive odd integer is of the form 6q+1, 6q+3 or 6q+5, where q is any positive integer

asked by priya on June 20, 2009
20. ## math

convert 689 base 10 to base 3. Can you please show me this step by step

asked by Emily on September 26, 2017
21. ## algebra

Simplify x / 6x - x^2 Please show me how you did it so i can understand! Another one, Simplify x^2 - 3x - 18 / x + 3 This is a fraction Another one, k + 3 / 4k - 2 (this is a fraction) * 12k^2 + 2k - 4)

22. ## programming

Can someone teach me how to show whats on my computer screen to another computer's screen?

asked by Clayton on December 18, 2014
23. ## Differential Calculus

use the rule that says limit of (e^h - 1)/h = 1 as h approaches 0 to show that the limit of [ln(x+h) -lnx]/h as h approaches 0 = 1/x, where x>0

asked by Kristen on November 8, 2008
24. ## Probability

Show that if events A B and C are independent that the following pairs of events are also independent: a) A and B Union C b) A - B and C

asked by Chris on February 3, 2009

I need help with this problem ! 5 2/5 - 3 4/5= ? 6 1/10 - 3 4/10 = 10 - 4 2/5= ? PLEASE! SHOW ME EACH PROBLEM STEP BY STEP SO , I CAN FINISH MY HOMEWORK! THANK YOU!

asked by pat on March 3, 2011
26. ## calculus

use the rule that says limit of (e^h - 1)/h = 1 as h approaches 0 to show that the limit of [ln(x+h) -lnx]/h as h approaches 0 = 1/x, where x>0

asked by Anonymous on November 8, 2008
27. ## Math

Use the definition of the derivative to show that if f(x)= square root of x, then f(x)= 1/2(square-root x)

asked by Paul on February 15, 2013
28. ## math

show that any positive odd integer is of the form 6q+1, 6q+3 or 6q+5, where q is any positive integer.

asked by priya on June 21, 2009
29. ## accounting

Schumacher Company uses the perpetual inventory system, and it engaged in the following transactions during 2012: 1) Started the business by issuing common stock for \$7,500 cash 2) Paid cash to purchase \$5,000 of inventory 3) Sold inventory that cost

asked by Anonymous on March 7, 2012
30. ## Physics Urgent

A container of volume V = 103 cm3 has a mass of 30.0042 g when evacuated. When the container is filed with an unknown gas of pressure p = 4.72 atm at temperature T = 20oC, the mass of the system increases to 30.9508 g. Assuming that the unknown gas behaves

asked by Sydney on November 8, 2010
31. ## Physics Urgent

A container of volume V = 103 cm3 has a mass of 30.0042 g when evacuated. When the container is filed with an unknown gas of pressure p = 4.72 atm at temperature T = 20oC, the mass of the system increases to 30.9508 g. Assuming that the unknown gas behaves

asked by Sydney on November 8, 2010
32. ## History

In what way was the Khmer empire influenced by India? A.The Khmer empire used an adapted form of India's writing system. B.The Khmer empire was conquered by India. C.The Khmer empire's common people practiced Buddhism. D.The rulers of the Khmer empire

asked by LARRAY on December 15, 2018
33. ## Chemistry

A 112 mL solution of 0.351 M HCl is added to 52.0 mL of 0.161 M HCl. What is the new concentration of HCl?

34. ## Data Management

Could you help me with this math question. The mean of 4 numbers is 5 and the mean of 3 different numbers is 12. What is the mean of the 7 numbers combined? Produce an algebraic solution.

asked by Mabel on March 2, 2015
35. ## ap chemistry

The ionization constant of HF is 7.2 × 10−4. What is the molar concentration of H+ in a solution which is 0.353 molar in HF and 0.145 molar in KF?

asked by gabriella on February 4, 2014
36. ## Biology

What happened if you put the Elodea leaf cells in a solution of 0.5% NaCl,1.8% NaCl and 0.9%NaCl?

asked by Ivy on July 23, 2011
37. ## Bio/Chem

If i change the concentration of the 3% hydrogen peroxide solution to 1.5%, am I changing its concentration or percent concentration?

asked by Pink on April 20, 2014
38. ## chemistry

A 0.010 M solution of a weak monoprotic acid has a pH of 3.70. What is the acid-ionization constant, Ka, for this acid? a. 2.0 ´ 10-4 b. 2.0 ´ 10-5 c. 4.0 ´ 10-6 d. 4.0 ´ 10-7 e. 4.0 ´ 10-8

asked by zacky on May 13, 2010
39. ## Honors Chemistry

When a solution is red, does it absorb or transmit red light? If it absorbed red would you see it? You see what is transmitted.

asked by Anonymous on October 16, 2006
40. ## chemistry

calculate kole fraction of hcl in solution of hcl contaning 24.8% of hcl by mass

asked by dipak on August 28, 2015
41. ## algebra

how many real number equations does this equation have? 0= -7x^2+6x+3 A. 1 solution* B. 2 solutions C. no solutions D. infintie solutions

asked by zzz on April 29, 2019
42. ## Chemistry

How many mL of 0.100 M HCl must be added to 100.0 mL of 0.100 M F- to prepare a buffer solution that has a pH of 3.05? F- (aq) +H20 (l) HF (aq) +OH- (aq) Kb= 1.47*10^-11

asked by TP on April 3, 2018
43. ## math

How much pure acid must be added to 2 liters of a 10% solution of acid to obtain a mixture that is 20% acid?

asked by ken on January 17, 2017
44. ## Math

What is an estimate of the solution of the equation 6n+3=2? Use a table. ok so I know the answer is -1/6 but its asking to use a table? does anyone know what kind of table you use for this and how I'd use it? thank you soo much

asked by Memes on October 2, 2017
45. ## Math

A whole brick is balanced with 3/4 pound and 3/4 brick. What is the weight of the whole brick ? Use a visual solution process

asked by Dell on October 29, 2012
46. ## Math

What is an estimate of the solution of the equation 6n+3=2? Use a table ok so I know the answer is -1/6 but its asking to use a table? does anyone know what kind of table you use for this and how I'd use it? thank you soo much

asked by Kylie on October 21, 2016
47. ## US History

In the Watergate Scandal, I know that 5 men broke into the Democratic National Committee headquarters and Nixon did not want to give up the tapes that revealed that he wanted to cover up the break in... why? 1) Did Nixon put up the tape recording system in

asked by Amy~ on August 7, 2010
48. ## physics

A set of crash tests consists of running a test car moving at a speed of 11.6 m/s (25.52 m/h) into a solid wall. Strapped securely in an advanced seat belt system, a 61 kg (134.2 lbs) dummy is found to move a distance of 0.69 m from the moment the car

asked by Tsion on February 12, 2014
49. ## The court system

I need to write a 1400 word paper comparing the entertainment fiction of the court system with its reality. Describe the fictional portrayals of the courtroom including the trial process, the roles of the prosecution and defense, the roles of the courtroom

asked by Ron on November 29, 2008
50. ## Math

40-3n=-23 what is n? 2/3-6h=-13/6 what is h? write as a equation,then solve. the quotient of a number and 2, minus 9, is 14 a number decreased by 7 and then divided by 5 is 13 the sum of 15 and 7 times a number is 99

asked by Maryam :) on October 23, 2012
51. ## Math

I want to check this. I had used formulas V = B x H and I x w x h to solve these What is the volume of the box that is 14 inches long, 7 inches wide and 10 inches high? I got 980. Am I right?

asked by Ben on December 16, 2014
52. ## Math

1. Solve each absolute value equation or inequality and choose the correct answer from the choices provided. |x| + 5 = 18 (1 point) 5 or –5 13 or –13 18 or –18 23 or –23 2. |x + 3| < 5 (1 point) –8 < x < 2 –2 < x < 8 3 < x < 5 –3 < x < 5 3.

53. ## Statistics

hii. I have a question about pdf and cdf.. I couldn't solve it Please help me :/ 1) the pdf of the random var. X is given by f(x)= (3/8)(x+1)^2 if -1

asked by Melike on January 10, 2014
54. ## Trigonometry

How do you solve this trig identity? Using @ as theta: Sin@-1/sin@+1 = -cos@/(sin@+1)^2 I've tried it multiple times but I can't seem to arrive at the answer.

asked by Sammy on November 27, 2012
55. ## Math

How do you solve this? I have tryed so many times and can not get the right answer. (1.65-1.05)^2/0.4+0.8 The answer is suppose to be 1.7 but everytime I do the problem i don't get anything near that answer. Help would be greatly appreciated.

asked by Sally on January 21, 2010
56. ## Math

How would I would I solve this problem -25-75h=h+25 Add 25 to both sides. Subtract h from both sides. This should leave you with -76h = 50 Finally, divide both sides by -76

asked by Dustin on March 15, 2007
57. ## math

One leg of a right triangle is one less than twice the other. The area of the triangle is 18 square feet. What is the length of the 3rd side of the triangle? Solve by factoring. A= 1/2 (b)(h) 18= 1/2 (x)(2x-1)

58. ## algebra 1

Given any random, 3-digit number, what is the probability that a number will be: a) a multiple of 5 b) divisible by 2 c) a square number i know the answer but i don't know how to solve it

asked by naomi on January 18, 2013

The length of a rectangle is 5 ft more than the width. If the area of the rectangle is 36 sq. ft what are the dimensions of the rectangle? (Please provide steps/explanation to solve this problem.)

asked by purpletree on March 29, 2009
60. ## CHEMISTRY

WHEN A 50.0g SAMPLE OF AN ELEMENT COMBINES COMPLETELY WITH ANOTHER ELEMENT TO MAKE 78.4g OF A COMPOUND. WHAT MASS OF THE SECOND ELEMENT REACTED? HOW TO i SOLVE THIS PROBLEM?

asked by pat on September 27, 2007
61. ## Physics

Here, I am dealing with a Science formula for momentum. The formula is: M= mv So, I have: m= 10 grams (.01 Kilograms) v= 5,000 centimeters a second (50 m/s) It says to Find M and also solve the formula for M. Please help!

asked by Amal on June 8, 2010
62. ## Physics

Here, I am dealing with a Science formula for momentum. The formula is: M= mv So, I have: m= 10 grams (.01 Kilograms) v= 5,000 centimeters a second (50 m/s) It says to Find M and also solve the formula for M. Please help!

asked by Amal on June 8, 2010
63. ## Physics/Maths

Keplers third law I understand. T^2/a^3 of one planet = T^2/a^3 second planet. But I can't do the algebra to solve for the second planet's a^3 (semimajor axis) Would someone walk me through the steps please? Thanks.

asked by charlie on June 11, 2009
64. ## algebra

Solve the linear equation using any technique you have learned. Name the technique. Check. 3x + 12 = -7x - 28 I know the answer is x = -4 and I know that substitution is the technique that is used, but I can't figure out how to set this up

asked by lovey on February 21, 2010
65. ## GYAN

a base ball team has lost games and has won 13 games. WHAT PER CENT OF THE GAMES PLAYED DID THEY WIN? HOW CAN SOLVE

asked by SUNIL on February 9, 2016
66. ## English

Writeacher,I need you help to work out the questions to the following answers (You have already checked). 1) Which pattern does Robinson's education of Friday recall? What advantages does Robinson have over Friday? Robinson’s education of Friday recalls

asked by Henry on March 4, 2012
67. ## chemistry

Acetone, a common solvent has a density 0.79g/cm^3 at 20C. What is the volume of 85.1g of acetone at 20C? What is the mass of 125ml of acetone at 20C? Show your calculations.

asked by Jay on September 19, 2014
68. ## General

Is it illegal for a school to not have a subsitute teacher assigned to a class when the teacher is not going to be in for the day and students just show up to class and no teacher apears for the whole class? Is that legal?

asked by General on May 22, 2009
69. ## Chem

The density of ethanoic anhydride is 1.092 g/mL. Use this value, and the amount that you used in the laboratory to show that ethanoic anhydride is in excess for your preparation of ASA?, 2.5ml of ethanoic anhydride was used.

asked by Dan on March 14, 2014
70. ## math problem

In a television game show, there are five questions to answer. Each questin is worth twie as much as the previous question. If the last question was worth \$64000, what was the first question worth?

asked by marcus on August 8, 2009

on a farm there is 18 pigs and chickens (all together). There are 52 legs, how many pigs and how many chickens are there? Show how you got your answer. i know there are 10 chickens and 8 pigs, but i did that through trial and error, can you help me figure

asked by m-cook on August 17, 2009
72. ## Composition (Intro Paragraph)

I would like to get a little feedback. I had to write an introduction paragraph of at least 250 words that includes a thesis sentence stating how and why the specific work is more than just a piece of entertainment. The thesis must relate why it is a

asked by Jim on March 27, 2011
73. ## college physics

Explain each of the following questions. ( a) Can an object– Earth system have kinetic energy and not gravitational potential energy? ( b) Can it have gravitational potential energy and not kinetic energy? ( c) Can it have both types of energy at the

asked by matt on October 5, 2010
74. ## physics

Explain each of the following questions. ( a) Can an object– Earth system have kinetic energy and not gravitational potential energy? ( b) Can it have gravitational potential energy and not kinetic energy? ( c) Can it have both types of energy at the

asked by matt on October 5, 2010
75. ## English Essay

When it comes to conversation, husband and wives often have problems that close friends of the same sex don't have. First, they may not have much to talk about, and second when they do talk. misunderstanding s often developed that lead to major fights. our

asked by san on February 24, 2007
76. ## history

What was the Roman Empire’s system of government prior to Julius Caesar that heavily influenced Western democracies? Peasants, including women and slaves, were ruled by kings, barons, and lords. Roman government consisted of a king, crown prince, and an

asked by Kira on September 29, 2017
77. ## Science ENGR Part 2

How many electrons are in the upper level? Problem 2 Problem 1 of chapter 6 of the course-pack. Use eqn. 2.27 for the definition of decibel. Eqn. 2.27 : A(w)=-20log|T(jw)| db Use the plot to calculate the repeater distance in a long haul optical

asked by Pam on November 19, 2006
78. ## Geography

Essay Topic: Describe the geography of southern South America and how this geography influences economic activity? This is what I've got: Southern south America consists of numerous physical regions with varying landforms, climates, and vegetation. There

asked by mysterychicken on September 9, 2009
79. ## geometry

can someone please show me the answer for this problem ? a tree is situated on level ground from a point 135 feet from the base of the tree the measure of the angle of elevation from the ground to the top of the tree is 43 degrees which is the height of

asked by ,,,,, on March 25, 2013
80. ## english( racism)

I am writing about racism in los angeles, and I have to use newspaper articles. I wanted to show that African earn less money than whites. Also their are more African americans behind prision bars. however, I cannot find anything along these lines. It has

asked by lenny on May 8, 2009
81. ## statistics

A telephone company representative estimates that 40% of its customers use voice mail. To test this hypothesis, she selected a sample of 100 customers and found that 37 used voice mail. At a standard deviation of 0.01, is there enough evidence to show the

asked by Kay on July 19, 2012
82. ## English

6. Read the following lines from the poem "Love After Love.""you will greet yourself arrivingat your own door, in your own mirror,and each will smile at the other's welcome,"In these lines, the mirror most likely symbolizes (1 point) a) a show of vanity.

83. ## Sets

My teacher assigned homework today that says to "specify the intersection and the union of the given sets." 1 problem is : {10,-6,-2} and {-2,2,6} i believe what she is requesting is 2 venn diagrams. one for intersection and one for the union. I've made

asked by Jason on December 7, 2007
84. ## Chemistry

Why neon gas is used in botanical gardens and green houses? Why KrF6 doesn't exist? Why helium can diffuse through rubber,PVC and even glasses? Show two-center-two electron bonds and three-center-four electron bonds in B2H6?

asked by Edd on August 22, 2014
85. ## Chemistry

Calculate the total number of atoms in 0.00102 mol CH3(CH2)4CH2OH The answer in the back of my book says 1.29 x 10^22 but i do not understand how they got to that answer. Will someone please show me how they would set up the problem. I though all you had

asked by Bob on March 8, 2009
86. ## Math

which statement are always true about a scatter plot with a positive trend? Choose two The point will form a straight line•• As the x value increases the y value increases The point will show a general upward trend left to right on the graph••

asked by Hey on April 20, 2016
87. ## Calculus

Determine an upper/lower estimate for the area under the curve f(x) = cos x between x = 0 and x = pi/2 . Show how you arrive at this estimate. This is the question that my teacher wanted us to answer and I'm not sure how to even start the process. Should I

asked by Mia on October 29, 2016
88. ## physics

A physics student drops a physics text book into a mine shaft 250m deep,where the average mine temperature is 5degrees celsius.Show that the sound of the book striking the bottom is heard after 7.82seconds

asked by musuma on April 21, 2012
89. ## maths

hi, need help in below problem. thanks. A cruiser which can steam at 48 km/hr received a report that enemy vessel, steaming due north at 32km/hr, is 46 km away in a direction 30 degrees north of east. show graphically or by calculation , that the cruiser

asked by peterlaw on September 12, 2016
90. ## Algebra 2

I'm confused on how to do this. 1.) Show that f(x)=x^4 -2x +8 has nonzero constant fourth-order differences. SIMPLIFY THE EXPRESSION: (HOW?) 2.) 8^log(8)^x eight log root 8 ^x (here it is written if you can't understand the actual expression. It is

asked by Jake on June 18, 2015
91. ## Math

Tony broke a larger array into 2 x 9 array and a 4 x 9 array. What did the larger array look like? Draw picture. Write a number sentence to show the relationship between the large array and the two smaller arrays.

asked by Cc on November 29, 2016
92. ## can someone edit my paragraph thanks!

Gorbachev did not think about all the consequences that would happened if he changed Russia into perestroika. He underestimated the effect that perestroika would have on Russia. Yes, his political initiatives were great for freedom and democracy but all

asked by Anonymous on April 30, 2007
93. ## english

hi im indiya and im here to ask you a interesting question well my question is do you no a website about balanced reports based on why children are given homework? The why is simple: Practice. Humans learn by repetition spaced over time. The average task

asked by indiya on January 11, 2007
94. ## Absolute Value and Limits

solve for limits of 1+ and 1- for this function: (x^2 + abs (x-1) - 1)/ abs (x-1) i don't know how to simplify abs. value expression times polynomial. can someone please help.

asked by Angie on March 13, 2013
95. ## Algebra

I'm trying to solve x^3-3x^2-x+3 is less than zero. Except, I'm not sure how to factor it. I tried splitting it so that 3 would be a factor for 3x^2 and 3, so the result was 3(-x^2+1), and x^2 was a factor for x^3 and -3x^2, resulting in x^2(x+3). But this

asked by Devon on October 14, 2009
96. ## Maths: Algebra Matrices Class 12th

matrix{{0, 1, -1}, {2, 1, 3}, {1, 1, 1}} matrix{{1, -1, x}} matrix{{0}, {1}, {1}}=0 Find the value of x Don't give me the direct answer. Please tell me how to go about this. Draw in your notebook and then solve

asked by Akash on April 11, 2011
97. ## math

I have spent hours trying to do these, help! Use the given information to solve the triangle. 1) C = 145 degrees, b = 4, c = 14. 2) A = 150 degrees, C = 20 degrees, a = 200.

asked by Britt on December 16, 2011
98. ## english

Has anybody read the poem Calgary 2am? If so, can anyone help me analyze the poem? It seems that it is very confusing and I can not "solve" the poem. Thanks! No one has answered this question yet.

asked by pogilang on September 16, 2009
99. ## Math: Vectors

Find any vector w that is perpendicular to both vector "u = 3j + 4k" and vector "v = 2i". Note: i, j and k are unit vectors How would you solve this problem? Please walk me through?

asked by Anonymous on February 26, 2008
100. ## math

finding the worth of the unit fraction will help you to solve each problem below. 1. if 4/5 of a number is 16, what is 1/5 of the number? 4/5 * x= 16 divide both sides by 4 1/5 x = 4 One fifth of the number is ...four.

asked by jack on April 3, 2007