# Questions on Algebra: Equations answered by real tutors!

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 Algebra: Equations Solvers Lessons Answers archive Quiz In Depth

 Question 185577: the perimeter of a rectangle is 192 dm if its length twice its breath find the dimensions Click here to see answer by vleith(2825)

 Question 185573: Translate into an equation and solve. After a 25% reduction, a picnic table is on sale for \$120. What was the original price? I was given \$160 as the original price and I can figure out with that, BUT how do I get \$160 from the information given? I cant go by the original price since thats what I need to find out. Click here to see answer by ankor@dixie-net.com(15647)

 Question 185575: In the problem, find the general linear equation (Ax+By+C=0 ) of the straight line that has the indicated properties. Q- Passes through the origin and is horizontal With details please.. Thankss Click here to see answer by stanbon(57290)

 Question 185574: In the problem, find the general linear equation (Ax+By+C=0 ) of the straight line that has the indicated properties. Q- Has the slope 0 and y- intercept -1/2 Please in details, thank you :) Click here to see answer by stanbon(57290)

 Question 185821: Two angles are complementry. The sum of the measures of the first angle and half of the second angle is 89.5 degrees. Find the measurements of each angle. Please show me the solution. Click here to see answer by checkley77(12569)

 Question 185935: Two angles are complementary. the sum of the measures of the first angle and half of the second angle is 89.5 degrees. Find the measures of each angle. Please walk me through this Click here to see answer by solver91311(16877)

 Question 185882: solve the formula A=1/9si for the variable s Click here to see answer by feliz1965(151)

 Question 186024: the sum of two numbers is twenty-one. Twice the larger is four times the smaller number. Find the two numbers Click here to see answer by swiemers(10)

 Question 186142: Hi. I have an exam tomorrow and I am working on a practice test and I have a question about a problem. Put each equation into slope-intercept form: y = mx + b. 2x + y = 2 So I got the answer: y = 2x + 2 The answer key says: y = -2x + 2 How did it become a negative -2x? How would I know when doing a problem that something with no negatives become a negative in the answer. Click here to see answer by jigs_ipan(5)
 Question 186142: Hi. I have an exam tomorrow and I am working on a practice test and I have a question about a problem. Put each equation into slope-intercept form: y = mx + b. 2x + y = 2 So I got the answer: y = 2x + 2 The answer key says: y = -2x + 2 How did it become a negative -2x? How would I know when doing a problem that something with no negatives become a negative in the answer. Click here to see answer by feliz1965(151)

 Question 186141: I am trying to help my ten year old son and am so lost. I am able to figure out for instance, n + 7 = 19. Then they rearranged the problem and asked him to solve 57 - w = 20. Not a clue. Thanks for your help. This is a teacher handwritten worksheet, so I do not have an ISBN. I do know that his school system uses the Everyday Math series. Click here to see answer by edjones(7569)
 Question 186141: I am trying to help my ten year old son and am so lost. I am able to figure out for instance, n + 7 = 19. Then they rearranged the problem and asked him to solve 57 - w = 20. Not a clue. Thanks for your help. This is a teacher handwritten worksheet, so I do not have an ISBN. I do know that his school system uses the Everyday Math series. Click here to see answer by feliz1965(151)

 Question 186174: 10. Multiply... I know I should know this, but my mind is overloaded with math...! (2s + 5z)^2 * (s + 3z)^2 Click here to see answer by checkley77(12569)

 Question 186247: A grocer mixed two varieties of tea, one that cost \$3 per kg with another that cost \$4 per kg. How many kg's of each should be used to make a 30 kg blend to sell for \$3.40 per kg. Click here to see answer by checkley77(12569)

 Question 186106: Hello. Perform the operations and simplify: (a^3)^2/b^-1 / (a^3)-2/b^-1 thanks! Click here to see answer by ankor@dixie-net.com(15647)

 Question 186371: I'm needing some help with the following problem: Factor each completely. Some may require several steps. a^4-16 thanks! Click here to see answer by jim_thompson5910(28546)

 Question 186370: I'm needing some help with the following problem: Factor each completely. Some may require several steps. y^3-8z^3 thanks! Click here to see answer by jim_thompson5910(28546)

 Question 186368: I'm needing some help with the following problem: Factor each completely. Some may require several steps. 3a^4-6a^3+9a^2 thanks! Click here to see answer by jim_thompson5910(28546)

 Question 186422: Hi, I am more of an older folk here so its not for homework. Actually it was a question asked to me and I have had a hard time to figure it out and its driving me nuts. I also was trying to show someone that there are sites out there for help in which it does not cost you. I think its wonderful you offer this. Ok here it goes. What two numbers when added together equals -6 and what same two numbers when multiplied equals -12. I hope you can help so I can show my friend there are people out there quite kind like you. Thank you Click here to see answer by jim_thompson5910(28546)

 Question 186403: If the formula R=-0.037x + 50.1 can be used to predict the world record in the 400-meter dash x years after 1925, for what years will the world records be 48.6 seconds or less? Click here to see answer by ankor@dixie-net.com(15647)

 Question 186474: I solved this problem and the teacher says it is wrong. Can you point out what is wrong and help me solve? 15/3y - (-80/10x) 5/y +8/x 13/xy Click here to see answer by stanbon(57290)

 Question 186496: Hello. I'm needing some help with checking what I did wrong on this problem: Factor each completely. Some may require several steps 3n^2+14n-5 thanks! n=[-14+ root((14^2 - 4*3*(-5))]/2*3 = [-14 + root(196 + 60)]/6 = [-14+16]/6= 1/3 n=[-14- root((14^2 - 4*3*(-5))]/2*3 = [-14 - root(196 + 60)]/6 = [-14-16]/6= -5 The result is n=1/3 and n=-5 Click here to see answer by Earlsdon(6287)
 Question 186496: Hello. I'm needing some help with checking what I did wrong on this problem: Factor each completely. Some may require several steps 3n^2+14n-5 thanks! n=[-14+ root((14^2 - 4*3*(-5))]/2*3 = [-14 + root(196 + 60)]/6 = [-14+16]/6= 1/3 n=[-14- root((14^2 - 4*3*(-5))]/2*3 = [-14 - root(196 + 60)]/6 = [-14-16]/6= -5 The result is n=1/3 and n=-5 Click here to see answer by dukesmart(20)

 Question 186497: Hello. I'm needing some help with checking what I did wrong on this problem: Factor each completely. Some may require several steps. a^4 - 16 thanks! Click here to see answer by Earlsdon(6287)

 Question 186510: What is the pattern? 2 - 1 3 - 3 4 - 6 5 - 10 6 - 15 7 - 21 8 - 28 9 - 36 10- 45 I have no idea what the pattern is thanks for helping Click here to see answer by stanbon(57290)

 Question 186484: Hello. I'm needing some help with checking what I did wrong on this problem: Perform the indicated operation and simplify (2/3x^-3y^5)(9/4x^3y^-3) thanks! Click here to see answer by rapaljer(4667)

 Question 186483: Hello. I'm needing some help with checking what I did wrong on this problem: Perform the indicated operation and simplify (2/3x^-3y^5)(9/4x^3y^-3) thanks! Click here to see answer by rapaljer(4667)

 Question 186512: Triangular numbers are numbers which can be represented by dots in a triangular array. each side has the same length as the number it represents ex. the # 3 has 6 dots in it's triangle I need to know what the pattern or equation is to solve this with any number thanks for helping Click here to see answer by stanbon(57290)

 Question 186495: Hello. I'm needing some help with checking what I did wrong on this problem: Perform the indicated operation and simplify (s+t)(s^2-st+t^2) thanks! Click here to see answer by josmiceli(9668)

 Question 186564: A salesman knows he has 36 tables in his store room, some of which have 3 legs and other 4 legs. He discovers by counting that there are 124 legs. How many tables with 4 legs does he have? (3x / 36)+(4x / 36) = 124 12x + 9x = 124 Click here to see answer by vleith(2825)
 Question 186564: A salesman knows he has 36 tables in his store room, some of which have 3 legs and other 4 legs. He discovers by counting that there are 124 legs. How many tables with 4 legs does he have? (3x / 36)+(4x / 36) = 124 12x + 9x = 124 Click here to see answer by solver91311(16877)

 Question 186572: I need help with this particular problem, I keep getting y=2/5x-1 but it is not correct, could someone give me a detailed way to solve this problem?? Problem : The equation of a line that goes through the point (8,6) and is parallel to the line 2x+5y=5. Any help with this will be greatly appreciated. Click here to see answer by Alan3354(30993)

 Question 186405: If three times the smaller of two consecutive integers is added to four times the larger, the result is 95. Find the smaller integer. Click here to see answer by jojo14344(1512)

 Question 186511: I dont know how to solve this but this is what i got so far ----# of toothpicks//perimeter fig1./3//////////////3 fig2./5//////////////4 fig3./7//////////////5 fig4./9//////////////6 fig5./11/////////////7 fig6./13/////////////8 I need to know the equation or pattern to solve it though thanks for helping Click here to see answer by Alan3354(30993)

 Question 186630: in production analysis, an isocost line is a line whose points represent all combinations of two factors of production that can be purchased for the same amount. suppose a farmer has allocated \$20,000 for the purchase of x tons of fertilizer (costing \$200 per ton) and y acres of land (costing \$2000 per acre). find an equation of the isocost line that describes the various combinations that can be purchased for \$20,000. observe that neither x nor y can be negative. With full details please Thank you :) Click here to see answer by vleith(2825)

 Question 186626: a straight line passes through (1,2) and (-3,8). find the point on it that has an x-coordinate of 5. with full details please thanks Click here to see answer by vleith(2825)