# 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 118898: find the slope and yintercept of the line 6x+2y=-36 Click here to see answer by jim_thompson5910(28598)

 Question 118875: . I have tried it and I can only get to the second variable. I have gone on to the next question and then gone back to it more than once. Click here to see answer by stanbon(57387)
 Question 118875: . I have tried it and I can only get to the second variable. I have gone on to the next question and then gone back to it more than once. Click here to see answer by jim_thompson5910(28598)

 Question 118905: solve for x x2-6x-160=0 x2 is x squared Click here to see answer by stanbon(57387)

 Question 118899: write an equation of the line passing though (1,-2),(5,-2)(10,-2) Click here to see answer by ilana(307)

 Question 118937: one watering system needs about 3 times as long to complete a job as another watering system.when both systems operate at the same time,the job can be completed in 9 mins.how long does it take each systemto do the job alone? Click here to see answer by checkley71(8403)

 Question 118935: it takes a painter A 3 hrs to paint a certain area of a hhouse.it takes painter B 5 hrs to do the same job.how long would it take them,working together,to do the painting job? Click here to see answer by checkley71(8403)

 Question 118936: one machine in print shop can prodce a certain number of pages twice as fast as another machine.operating together,these machines can produce this number of pages in 8 mins.how long would it take each machine,working alone,to produce this number of pages? Click here to see answer by checkley71(8403)

 Question 118896: The formula V=lvh gives the volume of a rectangular prism,where V represents volume , l represens length , w represents width and h represents height. Solve the formula for h Click here to see answer by MathLover1(6638)

 Question 118897: One hiking club charges \$20 to become a memeber and \$5 to participate on each hike. Another club charges no mebership fee,but charges \$& to participate on each hike. How many hikes must you go on to make the first club more economical? Click here to see answer by stanbon(57387)

 Question 113644: Determine the surface area and the volume for 5 blocks and 6 blocks. Number of Blocks Surface area (in square cm) Volume (In cubic cm) Block 1= 18cm area 4 cm volume Block 2= 30 cm area 8 cm vol Block 3= 42 cm area 12 cm vol Block 4= 54 cm area 16 cm vol Block 5= 66 cm area 20 cm vol Block 6= 78 cm area 24 cm vol Which I have done already. I am now supposed to: write an algebraic expression to represent the relationship between the number of blocks and the surface area of the tower. and use mathematics to justify my answer. What I do know: the surface area with each block adds 12 more cm and with each block added the volume increases by 4 cm, so do the 12 and 4 need to be in the expression and how would I express it? Click here to see answer by solver91311(16897)

 Question 119060: how do you write an equation off of a graph in slope intrcept form: With on the y-axis it hits -3 on the x-axis it hits 1.5 Click here to see answer by checkley71(8403)

 Question 119023: An algebra class of 21 students must send 5 students to meet with the principal. How many different groups of 5 students could be formed? Click here to see answer by checkley71(8403)

 Question 119054: twice the opposite of a number is 16 less than 6 times the number. What is the number? Click here to see answer by stanbon(57387)

 Question 119195: I submitted this question earlier but there was a typo I apologize to whoever read it. Here it is again. I need to find out how to solve the following problem using the addition or subtraction property. I need to find the values of x and y in these equations: 9x-2y=15 and 4x+3y=-5. It is very important that I see the work because I want to know exactly how to do it for future problems. Click here to see answer by jim_thompson5910(28598)

 Question 119192: Alright, here's my question. I need to find out how to solve the following problem using the addition or subtraction property. I need to find the values of x and y in these equations: 9x02y=15 and 4x+3y=-5. It is very important that I see the work because I want to know exactly how to do it for future problems. Click here to see answer by stanbon(57387)

 Question 119253: 4x -7 = 3x, I can't figure it out Click here to see answer by jim_thompson5910(28598)

 Question 119255: How do i solve y=0.5x+2 and -y=-2x+4 by systems of substitution? Click here to see answer by stanbon(57387)

 Question 119326: Solve and check each of the following equations for x. This is easy and i think I am thinking to hard. Please help. x/6 - x/8 = 1 Click here to see answer by scott8148(6628)
 Question 119326: Solve and check each of the following equations for x. This is easy and i think I am thinking to hard. Please help. x/6 - x/8 = 1 Click here to see answer by MathLover1(6638)

 Question 119347: Solve and check each of the following equations for x. more complicated and im thinking too much. thank you for helping me. x/x-2 - x+1/x = 8/x^2-2x Click here to see answer by ankor@dixie-net.com(15660)

 Question 119482: Heavens I have tried to solve this problem 4 different times and just can not figure out what I am doing wrong. Please help me. -7x-24=-26 1/3 I am supposed to have an interger or simplified fraction for x. I had thought the answer was -9 Thank you. Click here to see answer by Fombitz(13828)

 Question 119485: Nine pounds of sweet potatoes cost the same as 6 pounds of apples. One pound of sweet potatoes costs twice as much as a pound of onions, while a pound of apples costs 24 cents more than a pound of onions. Find the cost of each. Click here to see answer by MaxLiebling(13)

 Question 119484: The four oldest people in Golden City have lived a total of 384 years put together. The difference in ages for the youngest and the second oldest is 14. The second youngest is 3 years older than the youngest. The oldest is 20 years older than the average of the second oldest and youngest. What are their ages? The ages are ____, _____, _____, and _____ . Click here to see answer by MaxLiebling(13)
 Question 119484: The four oldest people in Golden City have lived a total of 384 years put together. The difference in ages for the youngest and the second oldest is 14. The second youngest is 3 years older than the youngest. The oldest is 20 years older than the average of the second oldest and youngest. What are their ages? The ages are ____, _____, _____, and _____ . Click here to see answer by Edwin McCravy(8909)

 Question 119635: i dont know how to do substitution algebra tiles! I'm extremely confused on HOW to solve substitutions. Please help me I'm having a hard time! 1. y= 2X 3X+y= 10 I'd REALLY appreciate the help! Click here to see answer by scott8148(6628)

 Question 119609: The perimeter of a rectangle is 32ft. Find the dimensions if the length is 4ft longer than 3 times the width. Click here to see answer by Caallen2(9)