# 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 572312: how do I find x if the problem is y= -3 Click here to see answer by Alan3354(30983)

 Question 572319: This solve by substitution method is really confusing me I really need help with this please 2x+2y=2 -8x+y=28 Click here to see answer by rfer(12647)

 Question 572318: I am having a really hard time figuring this out please van someone help me solve by substition method 4m+n=27 m-3n=23 Click here to see answer by rfer(12647)

 Question 572441: Please help me solve this substitution problem. If the system does not have exactly one solution, state whether it has no solution or infinitely many solution. y= 4x 3x-y=1 Click here to see answer by stanbon(57250)

 Question 572671: Use Pascal’s triangle evaluate each expression. Show all work (12) 11 Twelve over eleven. Click here to see answer by richard1234(5390)

 Question 573071: Try To Reduce These Fraction To Do Lower Term But Need Help 5/12 1/3 + Click here to see answer by Alan3354(30983)

 Question 573550: The measure of one acute angle in a right triangle is four times the measure of the other acute angle. Write and solve a system of equations to find the measures of the acute angle. My input on this is : ?????????????????????????? Can somebody help me please?!!!!????! Click here to see answer by TutorDelphia(193)

 Question 573795: 5x + 3= 2x+9 what is the value of x Click here to see answer by demarkus101(1)

 Question 574691: What values of x make this expression undefined? How to check this answer? (x+4)/(x^2-4x+4) Click here to see answer by g1000000(5)

 Question 575158: If -8 is added to a number and the sum is doubled, the result is 15 less than a number. Find the number Click here to see answer by stanbon(57250)

 Question 575162: A square plywood platform has a perimeter which is 8 times the length of a side, decreased by 28. Find the length of a side Click here to see answer by chana(69)

 Question 575184: John bought 15 pieces of fruit, some peaches and some plums. Peaches cost \$0.89 each and plums cost \$0.39 each. If John spent \$8.85 on fruit, how many plums did he buy? Click here to see answer by chana(69)

 Question 575406: find the value of r so the line that passes through each pair of points has the given slope. (r,3),(5,9),m=2 Click here to see answer by lwsshak3(6472)

 Question 575167: Jill is 10 kilometers away from joe. Both begin to walk toward each other at the same time. Jill walks at 1km/hr. they meet in 4hr. How fast is how walking? Click here to see answer by chana(69)

 Question 575850: CAn you show me the steps to sloving 2x-y=-4 -3x+y=-9 Click here to see answer by solver91311(16870)

 Question 576071: The marching band stand on the 50 yard line of the football field. After each set of steps, their distance ot the goal is 4/5 of the previous distance. how far do they travel in the 2nd set of steps and the 3rd set of steps? Click here to see answer by josmiceli(9661)

 Question 576614: Find the normal approximation for the binomial probability that x = 4, where n = 14 and p = 0.3. Compare this probability to the value of P(x=4) found in Table 2 of Appendix B in your textbook. Click here to see answer by solver91311(16870)
 Question 576614: Find the normal approximation for the binomial probability that x = 4, where n = 14 and p = 0.3. Compare this probability to the value of P(x=4) found in Table 2 of Appendix B in your textbook. Click here to see answer by richard1234(5390)

 Question 577619: Given a binomial distribution with n = 35 and p = 0.86, would the normal distribution provide a reasonable approximation? Why or why not? Click here to see answer by jim_thompson5910(28504)

 Question 127778: Find the width and length of the rectangle so that it has the given perimeter: P = 60 inches, width is x, and length is 3x – 5. Click here to see answer by ankor@dixie-net.com(15639)

 Question 577627: how do i solve these two equations using the elimination method: s=(3p-2) and s=(2p+1) Click here to see answer by josmiceli(9661)

 Question 577732: Ok so we are doing these problems where you have to find x and y and the equations are 4x+3y=9 and the other one is 3x+4y=12 and what I did was I multiplied 4x+3y=9 and -3 and then i multiplied 3x+4y=12 and 4. But my question is would you multiply the 9 and 12 to? Or would you just multiply the equations? And did I multply by the right numbers? Click here to see answer by KMST(1868)

 Question 577885: Expand (s-3v)^5 I got the solution s^5-15s^4v+90s^3v^2-270s^2v^3+405sv^4-243v^5 which I know is correct, but they are looking for another solution as well and it's not even something with parentheses. It's one of theses three options: Please help! :) s^5-5s^4+90s^3-270s^2+405s-243 s^5+45s^4v-270s^3v^2+810s^2v^3-1215sv^4+729v^5 s^5-5s^4v+10s^v^2-10s^2v^3+5sv^4-v^5 Click here to see answer by jim_thompson5910(28504)
 Question 577885: Expand (s-3v)^5 I got the solution s^5-15s^4v+90s^3v^2-270s^2v^3+405sv^4-243v^5 which I know is correct, but they are looking for another solution as well and it's not even something with parentheses. It's one of theses three options: Please help! :) s^5-5s^4+90s^3-270s^2+405s-243 s^5+45s^4v-270s^3v^2+810s^2v^3-1215sv^4+729v^5 s^5-5s^4v+10s^v^2-10s^2v^3+5sv^4-v^5 Click here to see answer by richwmiller(9135)
 Question 577885: Expand (s-3v)^5 I got the solution s^5-15s^4v+90s^3v^2-270s^2v^3+405sv^4-243v^5 which I know is correct, but they are looking for another solution as well and it's not even something with parentheses. It's one of theses three options: Please help! :) s^5-5s^4+90s^3-270s^2+405s-243 s^5+45s^4v-270s^3v^2+810s^2v^3-1215sv^4+729v^5 s^5-5s^4v+10s^v^2-10s^2v^3+5sv^4-v^5 Click here to see answer by KMST(1868)

 Question 577928: How do I write a scientic notation for the following information......Space vehicle goes 240,000,000 in 3 days(moon to earth) If it goes to Mars 350,000,000 miles,traveling the same speed it does going from earth to moon? Click here to see answer by stanbon(57250)

 Question 577940: Use inductive reasoning to find the next to numbers in the sequence : 9, -5, -19,-33 Click here to see answer by jim_thompson5910(28504)

 Question 28287: The perimeter of a rectangular garden is 52 feet. The length of the garden is 5 feet more than twice the width. Write a system of equations to find the dimensions of the garden, and then solve the systems of equations by substitution. Click here to see answer by marbat96(1)