solve: 4+8 1/2 -:- (1/4) to the third power. solve -11-(x+30)=-41-2 (5x-18) please show your work

66,222 questions
1. math

2. Simplify. Please be sure to show all of your work. -3(-9) – |-5 – 3 3. Simplify. Please show all of your work 9c^3+7c-(3c^3-12+c) 4. Solve 4x- 3(5x-8) =23-9(x+2) . Please show all of your work 5. Solve the following equation for z. Please show all

asked by christine on August 15, 2011
2. math

solve: 4+8 1/2 -:- (1/4) to the third power. solve -11-(x+30)=-41-2 (5x-18) please show your work

asked by keshia on July 18, 2011
3. math

Please help i really need an A and i'm horrible at math ): 1. solve the following equation algebraically, show your work 6 = x+2 over 3 2.solve the following equation algebraically, show your work 13 + w over 7 = - 18 3. solve the following equation

asked by hush my child on September 20, 2018
4. Science

In order to sail through the frozen Artic Ocean, the most powerful icebreaker ever built was constructed in the former Soviet Union. At the heart of the ship's power plant is a nuclear reactor with a power output of 5.60X10^7 W (5.60 times ten to the power

asked by Lilly on March 2, 2010
5. Algebra

91. Find the domain of: y=-3x+1 a. all negative numbers b. x>0 c. all real numbers d. x=3 Can someone please show the work and how to solve this problem. There are many of these in my lessons and I don't understand how to solve them. Do you solve for x?

asked by y912f on May 7, 2010
6. Algebra 2

I know that were doing problems were there is a soultion given which is equal to X^? times a constant ... y = k x^? So this is problem I have to decide given a probelm x relationship to y (for example iverse square cube and so forth) this unkown variable

asked by Dylan on May 20, 2009
7. Math

6x-4y=54 -9x+2y=-69 Which system would work best to solve? Please show work and solve. (all steps) Thank You I honestly don't know how to do this.

asked by Deborah on December 2, 2012
8. prealgebra

can you please help me and help me solve this and show work: Identify the percent of change as an increase or a decrease. Then find the percent of change. #1.) Original:45 New:30 Please help i don't understand how to solve and show work

asked by vick on February 27, 2012
9. pre-algebra

Would someone please reword this? Note: Remember to show all of the steps that you use to solve the problem. Be sure to use the text box where the question mark (?) first appears to show your mathematical work. You can use the comments field to explain

asked by BleakTuber on December 6, 2018
10. Math (Algebra)

Could I have someone check my work please? If I did something wrong please explain to me where I went wrong. Thank You. Example of the product rule to solve would be, (5^3)(6^3) Example of the quotient rule to solve would be, (4^2) / (8^2) Example of the

asked by Lynn on July 18, 2010
11. Algebra

Solve each inequality algebraically:how do I solve this problem? What is the answer? Show the work. x+4/x-2 less than equal 1 thanks for your help

asked by Jackie C on January 11, 2013

Bill has 30 coins, some nickels some dimes. They equal \$2.10. How many nickels are there? What is the equasion used to solve this problem? When I solve it, I get 4.3 nickels, but how can there be .3? Please help me solve I posted the two equations for this

asked by mary on December 17, 2006
13. Algebra

Solve the system of equations using substitution. x + 4y = -5 3x - 8y = 45 When I tried to solve it, I got x=-17 and y=-3. When I plugged these into the first equation, it didn't work out at all. Could someone please show me the steps so I can see where I

asked by Cassie on February 27, 2009
14. Math 7 A

Note: For questions 5 and 6, remember to show all of the steps that you use to solve the problem. Be sure to use the text box where the question mark (?) first appears to show your mathematical work. You can use the comments field to explain your work.

asked by jesse on November 20, 2017
15. Algebra 2

Solve for B: P.S. How do you solve for variables? Show your work. 3V=4(pi)a^2(b) I would truly appreciate it, if you helped! ^-^

asked by Shawol on October 12, 2011
16. Algebra

Please help me ASAP! 1. What is the solution to 45 - (-60)? Show your work. 2. Order the following integers from least to greatest: |-4|, 5, -10, 7, 0 3. Alan buys 3 dozen lightbulbs. After changing the lightbulbs in his house, he has 15 lightbulbs left.

asked by Anna P. on March 4, 2019
17. Geometry

To solve for the following proportion, you could use equivalent ratios, divide out the known ratio, or use cross products. Choose one of these methods to solve for t. Show your work and explain why you chose that method.

asked by Anonymous on March 31, 2011
18. math

To solve for the following proportion, you could use equivalent ratios, divide out the known ratio, or use cross products. Choose one of these methods to solve for t. Show your work and explain why you chose that method. 18/5 = 4/t

asked by Alexandra on June 6, 2011
19. ALGEBRA 1!PLZ HELP!

Use the Substitution method to solve the system of equations. y - 2x = -5 3y - x = 5 Solve the first equation for y. y = 2x-5 Substitute that for y in the second equation and solve for x. Then use the value of x to substitute back into the first equation

asked by SANDRO! on November 6, 2006
20. mat115

Please help me with this math question. I am asked to show my work but I don't know how to solve the problem to show my work. The question is: Choose the correct list of factors of the number 8. Again, I have to show my work with this question. Please help

21. Math

Hey, I just need my answer checked. Simplify: y to the 4th power times y to the 3rd power y to the 1st power y to the 7th power ** y to the 12th power y to the 43rd power correct? If not, please show work for me. thanks.

asked by IAmNotARobotTrustMe1 on September 6, 2017
22. MATH

To solve for the following proportion, you could use equivalent ratios, divide out the known ratio, or use cross products. Choose one of these methods to solve for t. Show your work and explain why you chose that method. eighteen over five equals four over

asked by Anonymous on June 13, 2012
23. Math

Evaluate the expression for the given value of the variable. Show your work. [-4b-8]+[-1-b^2]+2b^3;b=-2 Solve the equation. Check for extraneous solutions. 9[9-8x]=2x+3. Show your work. I really need help with both of these problems.

asked by Bethany on September 18, 2017
24. Math - Algebra

A. Solve the following quadratic equations. Make sure to show all your work. Do not use any method (e.g. factoring, completing the square, quadratic formula, graphing) more than twice. Use the graphing method at least once. 1. 3x+2 + 11x -20 =0 2. x2 + 3x

asked by Angela Again! on January 9, 2007
25. algebra

I have a problem that I have no idea how to solve. The instruction say to solve and check the given equation by rational exponents. The equation is: x to the 5/2 power = 32. Can you show me how to do this step by step?

asked by ron on December 7, 2011
26. For Hellpp - Algebra 2

I removed your original post because of an inappropriate name. Please -- in the future do not string out your name across the page. _________________________________ Homework Help Forum: Algebra 2 Answer this Question | Responses Posted by

asked by Ms. Sue on May 20, 2009
27. Pre-Calculus

Solve the system by the substitution method. Show your work. 2y - x = 5 x2 + y2 - 25 = 0 I solved the problem but I got it wrong for some reason..can you solve it step by step?

asked by Liz on June 2, 2016
28. solving for x math

2e^(4x^2)=3 how do i solve for x. do i use the ln methode because i don't know how to do that. by calculator, i got x=.168 but i don't know how to show my work. please help me solve for x. Take natural logs of both sides. ln 2 + 4 x^2 = ln 3 4 x^2 = ln

asked by david on December 5, 2006
29. math

please show me how to solve this (2x - 5y) power of 2 i am having a problem with the way to step by step please solve this

asked by kenny on April 23, 2013
30. algebra 2

asked by cait on January 16, 2018
31. physics

hey i have a some questions i am trying to solve for practice, because i have a test coming up. can you guys help me with them? i will post them Yes. Please show your work, however. Physics is best learned through practice, not by watching others solve

asked by gomez on August 7, 2007
32. math

solve for the indicated variable: a. temperature formula solve for F: K=5/9(F-32)+273 b. annual interest rate solve for R: A=P+Prt can you please show how to do these? thanxx =)

asked by narmin on September 24, 2009
33. Math Analysis

6. Prove that f(x) = (3/4)x^4 + 2 and g(x) = (4sqrt(108x-216))/3 are inverses. I know you solve it with composite functions f(g(x)) and g(f(x)), and I solved f(g(x)), but I can't seem to solve g(f(x)) to equal x, like it should. Can someone show me how to

asked by Emily on October 24, 2009
34. Substitution Method-Plz help

Use the Substitution method to solve the system of equations. x + y = -4 x - y = 2 solve for x in the second equation. x= y+2 Put that in for x in the first equation: x+y=-4 (y+2) + y = -4 solve for y. Then, x= y+2 i don't get it.How did you get that?What

asked by Svetlana on October 17, 2006
35. College Chemistry

Calculate pH of a 1.0 mol L -1 boric acid solution. (Ka(H3BO3) = 5.8 x 10 power -10 Please solve this problem. My computer does not have the power symbol. Can you please show maths and steps. Is mollar mass required of the above. Is -log and constant above

asked by Elleni on October 22, 2010
36. Algebra 2

1.What is the vertex from the equation? Y=x^2+12x=4 (Please show your work to show me the steps to get to the right answer.) 2. Use the quadratic formula to solve the equation. x^2-7x-6=0 (Please show your work to show me the steps to get to the right

asked by Sam on November 27, 2018
37. Algebra

Solve 3x +1 < 5 or 3x +1 > 4 By saying "solve," is it asking for me to show it on a line and in interval notation? Here's another: f(x) < 3 and f(x) > 4, where f(x) = 1/2x - 7 I have no idea how to solve this! Please walk me through it! Thank you so much!

asked by Harper on January 26, 2009
38. algebra

solve for the indicated variable: a. temperature formula solve for F: K=5/9(F-32)+273 b. annual interest rate solve for R: A=P+Prt im posting this the second time, but the first reply i got didn't help much :( can you show me how to do at least one of

asked by narmin on September 24, 2009
39. Algebra

Solve. Show your work. A high school athletic department bought 40 soccer uniforms at a cost of \$3,000. After soccer season, they returned some of the uniforms but only received \$40 per uniform. What was the difference between what they paid for each

asked by anon on August 23, 2015
40. Algebra

Can someone show me step by step how to do this problem to have an example to go by so I will be able to do my other problems. Thanks Solve by substitution 4x-12y=5 -x+3y=-1 I know that you have solve one of the equations. I have picked the second one so

asked by jessica on May 6, 2007
41. chemistry

Captain Kirk, of the Starship Enterprise, has been told by his superiors that only a chemist can be trusted with the combination to the safe containing the dilithium crystals that power the ship. The combination is the pH of Solution A described below,

asked by Tom on May 27, 2008
42. Math

We have an important chemsitry test due and I want to make sure that I do not mess up on my algebra. I am dealing with the integrated rate law, but my question is purely algebraically in nature. I hope, somebody can help me. 1) ln(A) = -kt+ln(B) solve for

asked by Yasemine on May 13, 2013
43. Algebra I

Exponential Function. Please show me how to solve: g(t) = -0.5 x 4w (that is 4 to the power of w) w=18

asked by Jane on January 8, 2012
44. Algebra Problem

I've gotten confunsed. Please help. Solve: 2y-a = a + 3b ____ ______, for y 3 4 Please show how to solve this. If you mean (2y -a)/3 = (a + 3b)/4 then 2y - a = (3/4) (a + 3 b) 2y = (7/4) a + (9/4) b y = (7/8) a + (9/8) b f(x)=x(squared)-4x+9 solve for x

asked by amy on August 30, 2005
45. Algebra

7x + 5 = y 3.5x + 20 = y Solve the system of equations. What method did you use to solve the system and why? Show your work. Can someone please explain to me the process of solving the system? That would be nice. Thanks! (=

asked by Scarlet on May 17, 2016
46. math

how to solve (3a squared+3a+3)+(15a squared+2a-9) need the steps on how to solve this I have to show all work

asked by shawnee on December 12, 2012
47. Calculus

Use the function f to solve the following: a) Local minima, local maxima, and stationary points if any. Show work. b)Intervals of upward concavity and downward concavity if any. Show work. c) Inflection points if any. Show work. f(x)=2x+1/x-2 Please, don't

asked by Alice on March 29, 2016
48. science

How do i calculate how much time it takes to heat water? All I know is the power supplied and the energy required. Thanks power= energy/time Power*time= energy you know the energy, you know the power, solve for time. time(in seconds)=

asked by barbara on January 16, 2007
49. 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
50. Algebra

Find two consecutive positive integers such that the sum of the square is 85..(show your work) If X is the first integer, then X+1 is the next; therefore, the sum of those squares will be 85. X^2 + (X+1)^2 = 85 Solve for X, then add 1 to it for the second

asked by Tomika on June 13, 2007
51. math

solve for x without using a calculator 5^(x+1) = 25 i know that x would equal 1 because 5^2 is 25, but i don't know how to show how to solve it All you need to do is what you just did: Explain that if x = 1, the equation is satisfied. If you are looking

asked by Anonymous on July 14, 2007
52. kaley

find the points at which the graph of 4x^2 - 4x + 12y^2 -6y = 10 has a vertical and horizontal tangent line. For the vertical only solve for y and for the horizontal only solve for x. I got the deriviative to be: (8x-4)/(-24y + 6). For the horizontal, x =

asked by math on November 2, 2009
53. calculus

find the points at which the graph of 4x^2 - 4x + 12y^2 -6y = 10 has a vertical and horizontal tangent line. For the vertical only solve for y and for the horizontal only solve for x. I got the deriviative to be: (8x-4)/(-24y + 6). For the horizontal, x =

asked by kaley on November 2, 2009
54. Math

Solve for S: r^2s-5s=7. Solve for b: L= 4a^2b. I'm confused about how to solve these problems. Could someone show me the steps?

asked by Sue on September 12, 2011
55. Math (Help!)

Note: Remember to show all of the steps that you use to solve the problem. Be sure to use the text box where the question mark (?) first appears to show your mathematical work. you can use the comments field to explain your work. Your teacher will review

asked by Ive on November 2, 2016
56. maths

the mid-point of the line FG is (6,10). if the coordinates of G is (8,14) find the coordinates of F. There are a number of ways to solve this but I think the simplest is to use the definiton of midpoint. We know mdpt(FG) = 1/2(F+G) where FG is the segement

asked by Jen on September 7, 2006
57. Algebra II

Solve the system using an augmented matrix. Show all work. -x - 3y = -17 2x - 6y = -26 Please help me! I don’t know how to do this. Can you show how to get it and the solution?

asked by Pookie on October 3, 2018
58. Need all the help i can get

Hi i'm pretty new to this and i don't know what to do?So i put these questions up im not sure if my answers will show up because i used color letters, but i need help checking and explaining steps N 108 is 36% of what number? Write and solve a proportion

asked by Rainbow Dash on January 7, 2016
59. Math 3

If you want to be eligible for partial credit, please show your work. Solve the following system of equations using any method. y=1/2x+3 y=1/3x-2 Try substituting the equations. if y=1/3x-2, then 1/3x-2 = 1/2x+3 Solve for x, then plug your solution in for

asked by Francheska on November 7, 2006
60. algebra

What is the value of the expression 2x to the 2nd power + 3xy -4y to the 2nd power when x = 2 and y = -4? please show how to solve this

asked by T on May 21, 2011
61. college Algebra

asked by Nicole on January 25, 2009
62. subsitution method

Can some one show me how to use the Substitution method to solve the system of these equations. x + y = -4 x - y = 2 x + y = 10 y = x + 8 on the first set. Solve for either x or y in either equation, then put that value into the other equation. Example: x

asked by mike on July 1, 2007
63. College Math II

x/x – 1 - 3/x = 1/2 I am not sure how to solve this equation and show my work. My problem just says to solve the equation. Thanks.

asked by Lori on November 21, 2009
64. Algebra

I need help I don't know how to solve this system Solve the following system. Show all your work 3x-2y+2z= 30 -x+3y-4z= -33 2x-4y+3z= 42

asked by Mary on October 7, 2013
65. Algebra, help needed

I need help I don't know how to solve this system Solve the following system. Show all your work 3x-2y+2z= 30 -x+3y-4z= -33 2x-4y+3z= 42

asked by Mary Ann on October 7, 2013
66. Math

How do I solve this question? "Rory Gilmore earns \$20 per hour during the week and \$30 per hour for overtime on the weekends. One week Rory earned a total of \$650. She worked 5 times as many hours during the week as she did on the weekend. Write and solve

asked by Max on February 19, 2011
67. algebra

The sample size needed to estimate the difference between two population proportions to within a margin of error E with a confidence level of 1- alpha can be found by using the equation shown below. Replace n1 and n2 by n and solve for n. E= z alpha/2

asked by Mario on October 30, 2013
68. algebra2 plzz help

how do you solve these problems (5x)to the power of a+4(5x)to the power of a-2 3 to the power of 5 times xto the power of y+4 divided by 9 times x to the power of y factor 5aa-2 , which is the greatest common factor, out. 5aa-2(25x2 + 4) check my thinking.

asked by britteny on January 11, 2007
69. free will baptiste

i am trying to help my daughter with home work but don't understand question. Show 30, Broken Key is 3. Show several ways. if am able to solve one i can help her to the rest.

asked by samuel on September 28, 2011
70. math

Solve using the algebraic method. x+5=15 SHOW WORK thanx subtract five from each side. Do you have an allergy to showing work?

asked by lida on March 29, 2007
71. How do I do this.?(Math.)

Use the Substitution method to solve the system of equations. y - 2x = -5 3y - x = 5 Solve one of the equations for x or y. Let's solve the first one for y: y - 2x = -5 y = 2x - 5 Now let's substitute 2x - 5 for y in the second equation to solve for x:

asked by Margie on February 5, 2007
72. Physics

Power supplied to a particle of mass 2 Kg varies with time as p = 3t^2/2 watt. Here t is in seconds. If initial velocity = 0, find the velocity after 2s. Sorry for not proving my work. Frankly speaking I'm unable to solve any power questions. Any help

asked by Mercury on November 7, 2014
73. Calc

how do I solve this arcsin(4/5) note that I am not looking for about 53 degrees I believe I'm suppose to solve euler's formula for x i.e. sin (x) = (e^(ix) - e^(-ix))/(2i) where x is in radians hence I would do something like this sin (x) = (e^(ix) -

asked by Kate on July 20, 2010

Here's one of the questions I have problems with: cube root of (x+2)=6th root of (9x+10) A. -1, 6 B. [-13 +/- sqrt(193)]/2 C. 1, -6 D. [13 +/- sqrt(145)]/2 Please explain how to solve this. Should you cube both sides, or raise both to the 6th? and I get

asked by Jennifer on May 4, 2008

Here's one of the questions I have problems with: cube root of (x+2)=6th root of (9x+10) A. -1, 6 B. [-13 +/- sqrt(193)]/2 C. 1, -6 D. [13 +/- sqrt(145)]/2 Please explain how to solve this. Should you cube both sides, or raise both to the 6th? and I get

asked by Jennifer on May 4, 2008
76. math

actually, in a addition to the question i posted a few minutes ago, can someone please help me with a few actual specific questions? thanks so much i'm very confused and i've been working on these all day. *Literal Equations* ~solve for x ax + bx = 8ab

asked by kim on October 26, 2007
77. geometry

what do I do to solve this problem? I don't know how to work it out, so could somone show me hoe to work it out. Please help! the lenght of a rectangular playing field is 5 ft less than twice its width.the perimeter is 230 ft,so what is the lenght and

asked by keshia on March 21, 2007
78. math

question 1. Note: Enter your answer and show all the steps that you use to solve this problem in the space provided. Solve the inequality and describe the solution set. y–6≥12 question 2.Note: Enter your answer and show all the steps that you use to

asked by helpmeee on May 13, 2019
79. algebra

Help, Can anyone show me how to do the formula to solve these equations? 4x-5y=38 7x-8y=-22 If you can show me the right way to solve, I do not understand how to get the answer.

asked by James H. on September 18, 2010
80. Algebra Problem

I can't fugure out how to solve (6-3w)(-w to the second power) please help It has to equal something in order to solve.... i ment how do i simplify it (6-3w)(-w^2 ) -6w^2+3w^3

asked by Avalon on October 8, 2006
81. Physics Conservation of energy

A box is pushed across the floor against a constant frictional force. The box is pushed across the room to the east in 30 seconds and returned to its starting point (pushed to the west) in 60 seconds. Which of the following is true about the work done and

asked by Casey on June 13, 2011
82. Intermediate Algebra (Math)

HELP PLEASE, Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. -2x Ð 8y = 22 -6x Ð y = 20 At first I tried to multiply by 8 but that did not work.

asked by Lyri on October 11, 2010
83. algebra

how would i find an equation of a line that goes through points(1,6) and (3,10)?? thanks A straight line is y=mx+b Substitute the points to make two equations. 6=m(1)+b 10=m(3)+b Two equations; two unknowns, m and b. Solve for m and b, then plug back into

asked by jasmine on December 22, 2006
84. Physics

A 250 g block is dropped onto a relaxed veritcal spring that has a spring constant of k=2.5 N/cm. The block becomes attached to the spring and compresses the spring 12 cm befor momentarily stopping. While the spring is being compressed, what work is done

asked by Me on December 16, 2006
85. Math

asked by Melea on February 16, 2012
86. algebra

solve show all work 8(6-5x)=-24(x-2)

asked by babygirl on September 6, 2011
87. Algebra1

I have to solve for "x": bx/c=2-cx/b please show your work! Thank you!

asked by NEED HELP NOW!! on February 22, 2013
88. Math

asked by Haylie on February 16, 2012
89. Math

asked by Olivia on February 16, 2012
90. Math

asked by Haylie on February 19, 2012
91. Pre- Algebra

Solve -3(2w-1) = 5w - 19. Please show all of your work.

asked by Kameesha on November 7, 2011
92. Algebra

Solve.Show work. -9y-12(2-3y)=-25-2(y+6)

asked by sherry on March 17, 2012
93. ALGEBRA

SOLVE AND SHOW WORK -6(5-2z)+5z-8z-3(16-3z)

asked by Lisa on July 15, 2012
94. Math

k/5+3/20

asked by Amanda on February 22, 2012
95. Algebra

Please solve: Show work 6x^2 = 36

asked by Jasmin on June 23, 2009
96. Math

asked by Haylie on March 7, 2012
97. math

how do you solve (and show your work for): 5-2x=7

asked by martha on April 15, 2010
98. Math

asked by Makayla on February 16, 2012
99. ALG 2!!!

please solve and show work 5(2x - 7) = 33 - 3(6x + 4)

asked by tyneisha on October 28, 2012