# 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 596
1. ## math

which figure does not show a line of symmetry? there's an isosceles triangle, a wide hexagon, a rectangle and a long pentagon i think its either the rectangle or the wide hexagon.

2. ## English

1. I'll keep my fingers crossed for you. [Do we have to use the fingers of both hands? Or do we use the right fingers alone? Do we have to show the back of the hand or the palm of the hand in this case?] 2. I'll cross my fingers for you. [Is this one the

asked by rfvv on April 23, 2018
3. ## Calculus

Find the anti derivative of the following: 1. u^-2(1-u^2+u^4)du 2. (sqrt(x)+ 3/x - 2e^(x))dx The anti derivative symbol is in front of the equations. Also need help on find f(x) so that it satisfies f'(x) = 1+e^x+1/x and f(1) = 3+e. Please show steps so I

asked by Rene on April 16, 2013
4. ## math

Susan has 50 ft. of fencing in her backyard. What is the largest area garden Susan can create, show the gardens dimensions and explain how you know its the largest area

asked by kaykay on January 9, 2011
5. ## Chemistry

the activation energy for the decomposition of HI(g) to H2(g) and I2(g) is 186kj/mol. the rate constant at 555k is 3.42 x 10^-7 L/mol*s. What is the rate constant at 645K? Please Show all Steps! thank you!

asked by Jack on October 26, 2010

Consider the function f(x)= x −1≤ x< 0 f(x)=tan(x) 0≤ x ≤ π/4 a. Draw a neat sketch of this function. b. Is f(x) continuous at x = 0? (Justify your answer.) c. Is f(x) differentiable at x = 0? (Justify your answer.) show steps! Thanks!

asked by Anonymous on April 8, 2014
7. ## Chemistry

A first-order reaction has rate constants of 4.6 x 10^-2 inverse seconds and 8.1 x 10^-2 inverse seconds at 0 degrees C and 20 degrees C respectively. what is the value of the activation energy? Please show all steps!!

asked by Jim on October 26, 2010
8. ## MATH

To get an A in history, a student must score an average of 90 on four papers. Scores on the first three papers were 92, 83, and 88. What is the lowest score that a student can make on the last paper and still get an A? CAN YOU PLEASE SHOW IN DETAIL THANKS

9. ## Language Arts

"who are those old men bent over in the sunshine? Skeletons of corn" Which line or lines show the distressing tone of the poem 1. line 1 2. line 2 3. line 3 *** 4. lines 1 and 2

asked by BoTheTruthThompson on March 26, 2017
10. ## Chemistry

What is the IUPAC name and classify as primary, secondary or tertiary ..............__ 1. CH3CH2-O-/..\ .............\__/ 2. CH3 .......\ .......CH-CH2-CH2-OH ......./ ....CH3 3. CH3CH2CH2CH2CH2OH, i show this to be 1-Pentanol which is primary.

asked by Mary on June 10, 2010
11. ## Factoring

x2(squared)-4x+4 I would factor this into (X - 2)(X - 2) If you don't know the rules for factoring, post, and we can show you how to do it. I don't know the factoring rules. My algebra teacher couldn't teach.

asked by Amanda on September 20, 2006
12. ## Math

A rectangular prism has a volume of 9 inches 3 cubed. The area of the base is 4 inches to 2 cubed. What is the height of the prism? Please show the steps to get the answer

asked by Cheyenne on May 3, 2018
13. ## Chemistry

A first-order reaction has rate constants of 4.6 x 10^-2 inverse seconds and 8.1 x 10^-2 inverse seconds at 0 degrees C and 20 degrees C respectively. what is the value of the activation energy? Please show all steps!! Thank You!

asked by Jim on October 26, 2010
14. ## algebra..Matrix...math

Hi, Please help me to this question would prove less than 10 hours Athens has a population of n ,m club with any club membership is an even number and the number of members of both clubs to prove and show m

asked by ali on May 28, 2015
15. ## Math

Consider the rectangle with an area of 24x^3-54x^2-15x, with a side length of 6x^2-15x. Write and simplify an expression for the length of the rectangle. ^ Could someone please show me how to do this?

asked by -Untamed- on December 10, 2011
16. ## science

express the component of a cross product vector C= A x B in terms of Levi civita product vector and the component of a and B, using this relation show that A . ( AxB ) = 0

asked by vijaya on July 31, 2008
17. ## Math Analysis

Tell if the function is symmetric with respect to the x-axis, y-axis, and origin. 3. 8x^2 - 2y^2 = 12 ==> I got that it was symmetric to both the x- and y-axes. Is this right? 4. 5x^2 - 3y^2 = 18 ==> I can't get anywhere with this equation -- I'm getting

asked by Emily on October 19, 2009
18. ## Maths

I must come up with an maths model to solve this... Sally is baking some biscuits for a party. It takes 5/6 of a cup of mixture to make one batch. How many batches can she make out of cups of mixtures?

asked by Sarah on March 22, 2015
19. ## physics

With what minimum speed must you toss a 160 ball straight up to hit the 15 -high roof of the gymnasium if you release the ball 1.7 above the ground? Solve this problem using energy.

asked by Dan on October 12, 2009
20. ## math

what do i have to do to solve this? Khety must save \$5050 for a down payment on a car. He currently has \$1925 in an account yielding 6.5% simple interest. If he saves no additional money, how long until he has enough for the down payment?

asked by amanda on September 17, 2010
21. ## trig

Two airplanes leave a airport at the same time , one going northwest ( bearing 315degrees) at 422 mph and the other going east at 341 mph. How far are the planes after 4 hours ? Please help have no idea of how to solve?

asked by stacey graham on April 26, 2010
22. ## math

Write the desired equivalent equation, and identify properties used to do so. Then solve. Ohm's law of electricity states that V = IR, where V = voltage, I = current, and R = resistance. Rewrite the equation for R.

asked by Tori on December 8, 2017
23. ## Math

I need help with this problem. La'Tasha's band needs money to go to a national competition. So far, band members have raised \$560,which is only one-third of what they need. What is the total amount needed?Write an equation then i'll solve it.

asked by Ebony on September 27, 2010
24. ## math

In the xy-plane, line l passes through the origin and is perpendicular to the line 4x+y=k, where k is a constant. If the two lines intersect at the point (t,t+1), what is the value of t? I tried drawing a picture of the problem described above, but I don't

asked by Michelle on October 31, 2008
25. ## Physics 103

How do I solve this problem: You buy a 75W lightbulb in Europe where electricity is delivered to homes at 240V. If you use the lightbulb back in the USA at 120 V, what will it's power output be?

asked by Sandra on February 4, 2010
26. ## Math Question

To solve this problem, use the Pythagorean Theorem to find the third side. Next, find the other five trigonometric functions of theta (sin, tan, csc, sec and cot). Cos=5/7

asked by Tori on December 2, 2014
27. ## Electrostática

A linear charge lies on the y-z Plane. Find the electric Flux passing throught the Plane extending from 0 to 1.0m I nerd th is problem solve analytical and in matlab

28. ## statistics

Solve the problem. Round to the nearest tenth unless indicated otherwise. The amount of rainfall in January in a certain city is normally distributed with a mean of 4.3 inches and a standard deviation of 0.3 inches. Find the value of the quartile .

asked by bob on December 18, 2013
29. ## Trignometry

Solve the equation. Express your answer in trigonometric form. x^5-11=0 I know the answer is: 11^1/5(cos α + i sin α) for α = 0°, 72°, 144°, 216°, 288°. But I don't know where to even start working on this problem.

asked by hello on July 1, 2013
30. ## Algebra

Please help me to solve this Radical Expressions and equations word problem. Here is the question: Find the perimeter and the area of the rectangle. Here are the measurements: length is (sqrt 6+2) and the width is (sqrt 6-2)

asked by Jay on November 22, 2014
31. ## chemistry

calculate the amount of heat released when 77.0g of steam at 104.5 celsius cools to ice at 0.0 celsius. I don't understand the steps to take to solve this problem. Can someone walk me through it please?

asked by Loretta on November 12, 2014
32. ## Functions

Find the sum of the 50 greatest negative integers. I'm supposed to find a, d, and t(at)n, but I'm not sure which is which. I think it makes sense for n to equal 50, but apart from that, I don't know what else to do. I would really appreciate some sort of

asked by Lana on December 16, 2008
33. ## Physics

A falling toy, mass 10.0 kg experiences an upward force due to air friction of 40.0 N. Find the acceleration of the toy. I honestly have no idea how to solve this question. Could someone please help me? :(

asked by Austin on June 19, 2015
34. ## math

Hi, How do I improve my math skills? I can't calculate in my head (I.e 2x43), I would actually have to write it down to solve it. I took pre-calc, calc and didn't have problem understanding. I don't know what is wrong. what should I do?

asked by john on February 27, 2015
35. ## math

An amount of money is invested at 12%/a interest. Write an equation and solve it to determine the length of time it will take for the original amouunt to double if the interest is compounded annually.

asked by Cyn on December 3, 2009
36. ## Algebra

SOlve you have 78 feet of fencing to enclose a rectangular pasture by a barn. If you do not fence the side along the barn, find the length and width of the lot that will maximize the area

asked by Anonymous on March 5, 2013
37. ## Algebra

Write and solve an equation that represents the following situation 35 people paid a total of 245 for admission to a local soccer game. What is the price of admission. Please help im stuck.

asked by Katy on September 2, 2018
38. ## Chem

What equation can I use to solve this kind of problem? A metal undergoes electrolytic reduction according to ne- + Mn+ ===> M. What current (in Ampères) must be provided to deposit the metal at a rate of 1.914 mol/hr if n = 3?

asked by Ginger on March 30, 2008
39. ## math

If h=6, the IVP becomes dP/dt=P(7-P)-6, P(0)=Po Solve the IVP in implicit form though you should apply initial conditions. How small does Po have to be for the population to become extinct in finite time? explain using phase portrait.

asked by mike on October 16, 2011
40. ## Math

Local elections are coming up. It is expected that one of the candidates will receive 45% of the votes. There is a margin of error of 0.05. Write and solve the inequality that shows the range of votes that will go to this candidate.

asked by Wolf on October 30, 2017
41. ## Math

Compute the square footage of carpet needed to cover a room 10' 6" x 12' 3". Area (to the nearest tenth) = square feet. Can you explain the steps on how to solve this problem.

asked by Matthew on June 25, 2013
42. ## Chemistry

Heat 1kg of CaCO3, get 560g of CaO. Write the reactant equations and solve the mass of CO2 that born. The CaO is 100% pure. Anyone help me, pls?

asked by Melly on August 29, 2013
43. ## very complicated maths

Hey guys, need some help with a question ive been stuck on for a looooooong time! The question is: Given that (x+4) is a factor of the expression 3x^3+x^2+px+24, find the constant value of p. Hence factorise and solve the equation 3x^3+x^2+px+24=0 Any

asked by Nikki Clark on November 21, 2012
44. ## math

The following rational function describes blood concentration of a certain drug taken via IV over time: f(x)=x+1/x Find: a.the horizontal or oblique asymptote(s), if any, b.the vertical asymptote(s),if any, c. describe their possible meanings. Can somebody

asked by cindy on April 10, 2013
45. ## chem

At 668K 1 mol each of CO and Cl2 are introduced into an evacuated 1.75 L flask. At equilibrium, the total pressure of the gaseous mixture is 32.4 atm. Calculate Kp. How to solve this ? Co+Cl2CoCl2

asked by han on September 19, 2015
46. ## Physics

4 kg of lead shot at 91.1o C are poured into 4 kg of water at 29.5o C. Find the final temperature (in oC) of the mixture. Use cwater = 4187 J/kg oC and clead = 128 J/kg oC. Please i need the answer and equation used to solve for the answer Thanks!

asked by Jake on February 7, 2019
47. ## Math

The french club is sponsoring a bake sale. IF its goal is to raise at least \$140m how many pastries mut it sell at \$3.50 each to meet that goal? Writ and solve an inequality

asked by Took on October 26, 2015
48. ## physics

Determine the vertical component of a baseball's velocity if the ball is thrown at 28 m/sec at an angle of 37 degrees with the horizontal. The answer is 21.2 m/sec but I have no clue on how to solve this problem.

asked by confused on June 11, 2011
49. ## CALCULOUS

A bank account is growing by 4.3 % per year. Find the doubling time. Round your answer to the nearest integer. Can someone explain how to solve this step by step. I have been stuck on this for quite a while

asked by James on October 3, 2014
50. ## algebra

The power of a quotient rule - simplify (3y^8/2zy^2)^4 I need help in solving this problem - I do know to solve what is in the parentheses first. by the 4th power...but I need detailed guidance in order to grasp the concept - ty:)

asked by maryk on October 3, 2010
51. ## math

write and solve a 2 step equation a baseball ticket cost \$20 for each student that attends. there is also a parking fee of\$30 for the bus the total cost of the trip was \$330

asked by tra on October 23, 2011
52. ## chemistry help

the rate constant (k) for a reaction was measured as a function of temperature. A plot of In k versus 1/T (in K ) is linear and has a slope of -1.01 x 10^4 K. Calculate the activation energy for the reaction. i don't know how to solve it???

asked by sue on January 31, 2011
53. ## college physics

A swimmer is heading straight for the other shore of a river with a velocity of vs=0.7 m/s relative to the water, but is carried away by the current, which has a velocity of vr=0.3 m/s. It takes her 20.3 s to get across. How far downstream does she end up?

asked by Kelly on September 20, 2010
54. ## Math

1. O is the center of the given circle. the measure of angle O, is 134. The diagram is not drawn to scale. Assuming that the lines that appear to be tangent are tangent, what is the value of x? A) 67 B) 46 C) 314 D) 268 can someone please help? I saw an

asked by Tim on June 7, 2016
55. ## Chemistry

How do you solve this: Consider the decomposition of ammonium chloride at a cerain temperature NH4Cl(s) Calculate the equilibrium constant Kp if the total pressure is 2.2 atm at that temperature.

asked by Kim on March 2, 2009
56. ## Math

8. Sylvia is training for a triathlon. she cycles 6.25 km in 25 min. a) What is her average speed, in kilometres per hour? b) Solve a proportion to determine how long she would take to cycle 40 km. Us the speed in part A)

57. ## ap chem

the decomposition of (CH3)2O has a rate constant of 6.8x10^-4 s^-1. the initial pressure is 135 torr, what is the partial pressure after 1420s? i don't have the slightest idea on how to solve this.

asked by anna on February 17, 2008
58. ## Science

I need to know how a refrigerator works to come up with an example. Please keep it simple and easy to understand. or an example explaining how being able to understand scientific principles and think scientifically can help you solve problems and answer

asked by :) on September 5, 2017
59. ## Physics

Please help me solve this! The spectrum of the sodium atom is detected in the light from a distant galaxy. If the 590.0 nm line is redshifted to 658.5 nm, at what speed is the galaxy receding from the Earth?

asked by Brian on August 11, 2010
60. ## math

i'm having difficulty understanding radicals.. I don't know how to type the radical sign on here so i'll use parenthesis instead like for instance 17+34 (192)/34 how would u solve that.. also how do u decipher the two multiples of 192 since it's not a

asked by jerson on April 14, 2010
61. ## Math

I understand generally how to solve, by taking natural logs and the the derivative, but i am confused by the presence of the 3 in front... if f(x)= 3(sin(x))^x, find f'(1) should i move 3 to the y side or take the natural log of it? Thanks!

asked by Tokey on November 5, 2010
62. ## Calculus

Given vectors u= (1,-1,3) and v= (-4,5,3) find an ordered triple that represents vectors 3u-2v. a.(16,1,-7) b.(11,-13,3) c.(10,-12,1) d.(7,-7,16) I don't want you to straight up give me the answer. I need someone to teach me how to solve this problem. I am

asked by alana on August 23, 2012

144/k=9 I don't understand how to do this using reciprocals, how my teacher wants me to solve the problem. Note: The fraction bar is in my paper, so it's 144 being the numerator, k being the denominator, and then =9 if that makes any sense.

asked by Nicki on April 25, 2011
64. ## Algebra 2

Did I solve this problem correctly? Directions: State the possible rational zeros for each function. Question:f(x) = x6 - 64 Answer: Constant term:64 Factors:1,2,4,8,16,32,64 Leading coefficient:1 Factors: 1 ±1,2,4,8,16,32,64/1 = ±1, ±2, ±4, ±8, ±16,

asked by Truda on November 19, 2015
65. ## Solving One-Step Inequalities

Solve each inequality. 1/5 is less than or equal to x/15 70-a is greater than or equal to 25 I am really confuse about this and I Don't want cheating, I just want steps because I am not really getting this at all. Thanks! Also, this is for Ms.Sue, I know

asked by Anonymous on October 3, 2017
66. ## lorentz contraction

I've tried for hours to solve for v, but can't get the rearranging right. I'm using L= Lo sqrt 1- v^2/c^2 Can anyone suggest the first couple of steps? I can get the answer by the way, by substituting values 'til I get the contracted length. Original and

asked by charlie on March 27, 2009
67. ## Math - Measurement Pink Wk Bk (PLZZZ HELP!)

4. 3 1/2 T = ______ ib 5. 32 oz = ________ ib 7. _____ ib = 7 T Solve: 10. 12 oranges weigh 2 1/4 pounds. How many ounces is this? __________ PLEASE HELP, I really don't get this. Please Help!!!! Thank You!!! :) PS: For homework, we have to do p. 6 in our

asked by Lauren on December 20, 2011
68. ## Physics

A ray of light with wavelength 589 nm passes through an unknown material with a velocity of 1.94 x 10^8 m/s. What is the material? I think this problem has something to do with Snell's law, but there is no given angle of refraction so I don't know how to

asked by George on March 25, 2017
69. ## Algebra 1

Mary is 9 years younger than Greg's age doubled, and their total ages combined equals 33. Create and solve an equation to find both children's ages.

asked by Kayla on September 2, 2016
70. ## college statistics

assume the population of heights of female college students mean of 64.37 inches standard deviation of 6,26 in and random sample of 74 find p(x>65.25)B. find p(x>65.25)c. why is formulas required to solve a different than c.

asked by melba on June 14, 2012
71. ## GeneralChemistry

What is the minimum amount of 6.7M H2SO4 necessary to produce 27.9g of H2 (g) according to the following reaction? 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H2(g) I don't know how to solve it, and I don't understand the explanation given online.

asked by Sarah on April 2, 2015
72. ## Algebra

(I jut this in word form so someone would understand better but can someone please try helping me solve this. I only need help with this 1 problem.) Evaluate this pricewise function at x=-4 and x=4. f(x)={x^2, if x less than or equal to -4 {x^3, if -4 less

asked by Petter on September 20, 2017
73. ## Physics repost - need more explanation

Posted by Ceres on Wednesday, September 23, 2009 at 4:07pm. The question is: "A block of ice at 0oC is dropped from a height that causes it to completely melt upon impact. Assume that there is no air resistance and that all the energy goes into melting the

asked by Ceres on September 23, 2009
74. ## Chemistry

Consider a saturated solution of calcium fluoride in 0.086 M potassium nitrate. Complete the following tasks, and then answer the question. a) Write the chemical equation corresponding to Ksp. b) Write the defining expression for the thermodynamic

asked by Ashley on October 7, 2012
75. ## Physics

There is a small amount of water at the bottom of a sealed container of volume 5.2 liters which is otherwise full of an ideal gas. A thin tube open to the atmosphere extends down into the water. The system is initially at atmospheric pressure and

asked by Plaster on April 6, 2010
76. ## Accounting/math? check my work please

Cullumber Ltd. purchased a delivery truck on January 1, 2018, at a cost of \$74,160. The truck is expected to have a residual value of \$7,910 at the end of its 4-year useful life. Cullumber has a December 31 year end. Use the diminishing-balance method and

asked by Isha on November 7, 2017
77. ## Algebra

how do you solve this problem? (24b^3+16b^2+24b+39)/(4b+4)

asked by Cathy T on November 2, 2011

What is 5x+6x+7x=31,050 solve for X X is 1725 I'm lost where and how did they get 1725 for X

asked by Dawn on August 31, 2014
79. ## algebraII

solve for x: 1)log(x-3)+log(x+4)-logx=log5

asked by MIchelle on January 17, 2011
80. ## Algebra

I know the answer of x/x-2 + x-1/x + 1; but I do not know how to explain it in words. The answer is x = 0,1, when I solve for x.

asked by Abby on January 17, 2017
81. ## algebra 2

how do you solve this? -2square root7-4square root7

asked by Erin on October 26, 2008
82. ## Algr.2

10(line)2-4a(line)=20 Absolute value How do I solve this equation?

asked by Jessica on September 4, 2012
83. ## Math: Inequalities

How would I solve this inequality and graph? (x+2)((x^(2)-x+1)) > 0 I got x > -2 and x^(2)-x+1 > 0 How would I graph x^(2)-x+1 > 0 because I can't factor it.

asked by Amy~ on September 21, 2010
84. ## math

input output 2 11 _______ 20 _______ 35 7 26 15 50 5 23 how do i solve this?

asked by ty on March 12, 2013
85. ## math

6/(2x - y) + 7/(3y -x)= 7 4/(2x - y) + 14/(3y -x) =6 Please explain step by step to solve this equation.

asked by jenny on November 18, 2014
86. ## algebra

how do i solve this find the root 3x^2 +21x=0 is the root 7

asked by toni on October 8, 2013
87. ## MATH!!!!!!!!!!!!!!!!!!!!!

10(line)2-4a(line)=20 Absolute value How do I solve this equation?

asked by Jessica on September 4, 2012
88. ## pre algebrahow

do you solve a negative fraction plus a posotive fraction?

asked by emma on December 1, 2010
89. ## Maths

solve |x^2-5|=5x+9 please explain step by step how to get to the answer

asked by Bob on July 22, 2012
90. ## Trignometry

solve the triangle. B=77.0deg b=13.95 a=20.6 I got A=38.5deg C=64.5deg c=34.55

asked by yes on July 2, 2013
91. ## Algebra

Please solve for the interval notation corresponding to the set notation {x | x < –7}

asked by Jen on June 2, 2009
92. ## Math

Could someone please explain this for me? Solve the equation: log(2x - 3) = log(3 - x) - 2.

asked by Smothx on March 8, 2019
93. ## trigonometry

how to solve sin 4x= cosx(4 sinx - 8 sin ^3x)

asked by cristina on October 18, 2010
94. ## math

Given the function f(x) = 5(x+4) − 6, solve for the inverse function when x = 19. I believe the answer is 1 A 1 B 68 C 72 D 84

asked by Dhruv Patel on February 25, 2017
95. ## math

input ___ 16 22 50 8 30 output 10 11 14 28 ___ 18 please help me solve this.

asked by ty on March 13, 2013
96. ## math

input 2 ___ ___ 7 15 6 output 11 20 35 26 50 23 please help me solve this.

asked by ty on March 13, 2013
97. ## math

input 10 15 21 6 29 ___ output 12 22 ___ 4 50 2 please help me solve this

asked by ty on March 13, 2013
98. ## Algebra 2

How would you solve the following I'm stumped.. 1. 2x^2(squared)=30-4x 2. X^3(cubed)+8x=-6x^2(squared) Thanks!

asked by Kelsey on January 26, 2013
99. ## algebra 2

Can someone please help me solve this problem? I do not know how to do it. 2x(squared)+3x+1. And 3ay(squared)+9a?

asked by Eunice on November 24, 2015