# Questions on Algebra: Expressions involving variables, substitution answered by real tutors!

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 Algebra: Expressions involving variables, substitution Solvers Lessons Answers archive Quiz In Depth

 Question 211386: 1. If x= -49, what is -x equal to? 2. -(y+39)= Find an equivelent expression without parenthesis. 3. [56 / (-8)] / (-1/3)= (56 divided by (-8) divided by 1/3=) Click here to see answer by rapaljer(4667)

 Question 211624: Find value of c so that the point (4,2) lies on the graph of the function f(x)=cx^2+3x-4 Click here to see answer by stanbon(57977)

 Question 211501: Express as an equivalent expression, using the individual logarithms of w,x,y,and z. logb w^2x/y^3z Click here to see answer by Theo(3504)

 Question 211908: Consider the graph of a rational expression with x-3 as the denominator. What happens to the graph as x gets close to 3? What causes this behavior in the graph? Click here to see answer by stanbon(57977)

 Question 212021: HELP Please! I'm trying to help my 6th grader with his Algebra. What he is working on now in school is "Algebraic". I am LOST. It's been along time since I've been in school but this is the first time I have absolutely been DUMBfounded. I went on Wickpedia and couldn't understand a thing. The question is: car is traveling at 55 miles an hour. I want to write an algebraic expression to show how far the car will travel in a certain amount of hours. What will be my constant? what is my variable? The above question is not from a textbook Click here to see answer by rfer(12730)

 Question 212168: The engines on the Great Eastern Railway all have six axles and the cars (tankers and hoppers) all have four axles. If a recent train consisted of 43 units and had 178 axles, how many engines and how many cars were in the train? Note: an axle is a rod that holds a pair of wheels in place. When it came time to discuss the problem, students were first asked to simply tell the strategy they used to approach it. As a teacher, try to put yourself in the place of the students and work the problem in the manner that you anticipate the student has worked it. Click here to see answer by Theo(3504)

 Question 212181: 2/3 the length c of a bus have to put it into a algebretic expression Click here to see answer by Sunshine1245(9)

 Question 212187: Find three consecutive even integers such that four times the sume of the first and third integers is twenty less than six times the middle integer. Can you please write this in equation format with variables? I think I'm getting the wrong answer. Can you help me? Thanks! Click here to see answer by checkley77(12569)

 Question 212193: -4x(x-2)(3x-1)=0 I need to solve that. I don't understand if I distribute the -4x to the second set of paraenthesis. Click here to see answer by Fombitz(13828)

 Question 212282: 2x^2-(4-x^) using the distributive property. multiplying expressions. I need help understanding how to get the correct solution. Click here to see answer by rapaljer(4667)

 Question 212296: d = vt + 1/2 at^2 Solve for v. Click here to see answer by rapaljer(4667)

 Question 212325: A rectangle and a square have the same width, but the rectangle is 5m longer than the square. Their total area 133m2. Find the dimensions of each figure. Choices for the square's width are 6,7,8. Click here to see answer by HyperBrain(694)

 Question 212555: The gym is 21 years younger than the auditorium. The gym is also one fourth as old as the auditorium How old is each building? Choices for auditoriums age: 26, 27, 28. Use the 5-step plan. Click here to see answer by stanbon(57977)

 Question 212601: How do i write an expression to descirbe the pounds of trash produced per day by a family of m members? Click here to see answer by rapaljer(4667)

 Question 212639: what's the expression for the pattern 10+1, 10+2, 10+3.... Click here to see answer by vleith(2825)

 Question 212817: I HAVE TWO QUESTIONS I NEED HELP ON PLEASE 1. SOLVE 2x+4=x-5 2. solve 3x-4=5-(x+1) Click here to see answer by Earlsdon(6294)

 Question 212829: The sum of two numbers is thirty-three. Using x to represent the larger of the two numbers, translate "the difference between six more than twice the larger number and the sum of the smaller number and three" into a variable expression. Then simplify. Click here to see answer by ankor@dixie-net.com(15746)

 Question 212850: Write an algebraic expression for the following: The sum of some number squared and three multiplied by the difference of that number and four. Click here to see answer by Sunshine1245(9)

 Question 212860: How do I find the solution to this input output problem? E P 1 3 2 5 3 9 4 17 5 33 Click here to see answer by vleith(2825)

 Question 213180: I have problems with a few sums 1. find the product of (2x+3)(2x-3)(x-3) 2. find the product of (-2ab^2 divided by 3) (7a^3 b^4 divided by 4) Click here to see answer by cowgirl30(8)

 Question 213485: if 2t+(s-r)/3= t what is s in terms of r and t? Click here to see answer by drj(1380)
 Question 213485: if 2t+(s-r)/3= t what is s in terms of r and t? Click here to see answer by Theo(3504)

 Question 213555: 5 3 - minus - equals = (and how/why) 8 16 Click here to see answer by checkley77(12569)

 Question 213614: Please help me solve: The distance between two numbers is 18. Twice the smaller plus three times the larger is 74. What are the numbers? Thank you. Click here to see answer by stanbon(57977)

 Question 213736: a student has grades of 76,84,73 and 88 of four of the five unit tests in a course. let x represent the grade on the fifth test. this must be a whole number. an average of more than 80 is desired. a)write an inequality using x to represent the fifth test b)solve the inequality c)what is the lowest grade the student needs in order to have an average of more than 80. Click here to see answer by user_dude2008(1861)

 Question 211991: A boat weighs 1500 pounds more than its motor and 1900 pounds more than its trailer.Together the boat and trailer weigh five times as much as the trailer. How much does the boat weigh. Click here to see answer by josmiceli(9817)