# 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 340245: How do you write a numerical or algebraic expression for this problem? The number in cents of n nickels. Click here to see answer by fractalier(2101)
 Question 340245: How do you write a numerical or algebraic expression for this problem? The number in cents of n nickels. Click here to see answer by stanbon(57290)

 Question 340685: OK heres another story problem that i got confused on and need help. Even my dad didn't get either of them. Oh, and the square in the problem is just a regular square: "In the square, the variable represents a positive whole number. Find the value of such that the area and the perimeter of the square are the same." Click here to see answer by Alan3354(30993)

 Question 340726: How do you simplify 3x - 6 - 2(x - 4) Click here to see answer by mananth(12270)

 Question 341195: Can you help me solve this problem? -6-(3a-7)-2a=a-6 Click here to see answer by stanbon(57290)

 Question 341172: How would I use five 3s to write an expression who's value is 29? Click here to see answer by Edwin McCravy(8904)

 Question 341160: Which expression does not equal the others? A. 7n*1/4 B. 7n/4 C. 7*1/4n D. n*7/4 Click here to see answer by edjones(7569)

 Question 341168: How would I use five 3s to write an expression who's value is 3? Click here to see answer by edjones(7569)

 Question 341170: How would I use five 3s to write an expression who's value is 27? Click here to see answer by edjones(7569)

 Question 341242: Write a variable expression for the number of calories in e eggs and one slice of bread. Bread slice = 55 egg = 110 Thank you. Jennifer Click here to see answer by texttutoring(324)

 Question 341017: the square root of 81x to the fourth and y squared Click here to see answer by Fombitz(13828)

 Question 341397: I'm probably making this seem harder than it looks, but my course papers involve this example of rearranging an equation to make an unknown the subject. This is the question in full. The surface area (A) of a rectangular prism is given by the formula: A=2(bh+hl+lb) Evaluate b when A=11750sq mm; h=25mm and l=75mm I know the idea is to make b the subject first by rearranging, but I'm having difficulty coming to how to rearrange this formula without changing it beyond its function. Please help! Thanks Craig Jenkins (supposed engineering student.) Click here to see answer by Alan3354(30993)

 Question 341525: A 24-foot board is cut into two pieces. Twice the length of the shorter piece is 3 ft less than the length of the longer piece. Find the length of each piece. Click here to see answer by edjones(7569)

 Question 341651: Tell which rate is greater. 1 and 1/4 miles in 2 minutes and 4 seconds. Or, 1 and 3/16 miles in 1 minute and 55 seconds. Click here to see answer by Alan3354(30993)

 Question 341650: Write an expression for the situation. Number of hours in m minutes. Click here to see answer by jim_thompson5910(28546)

 Question 341780: ok here it is , tx-4x+3t you have to solve for x but how do i do this when there is two x's Click here to see answer by Edwin McCravy(8904)

 Question 341786: tx-4x=3 you have to solve for x but how do you do it with two x's Click here to see answer by Alan3354(30993)

 Question 341787: tx-4x=3t you have to solve for x but how do you do it with two x's Click here to see answer by Fombitz(13828)

 Question 342169: My daughter and I are stumped on how to set up this equation. I hope we picked the correct topic for this problem... Here's the question: Geno worked at the China Store on Sunday packing dishes for shipment. He received 5 cents for each piece he packed successfully and was fined 12 cents for each piece he broke. If he handled 187 pieces, and was paid \$8.16 how many pieces did he break? We know it's not the correct way to do the problem, but we started by assuming that if he handled all 187 pieces without breaking any, then he would have earned \$9.35. Then we started subtracting multiples of .12 to see if we could end up at \$8.16. We know there's a correct way to set up the problem but couldn't get it. Would you please give us as much detail as possible so that we (she) will be able to do similar problems on her own? Thank you so much! Click here to see answer by Alan3354(30993)

 Question 342122: Would someone please help me? I am absolutely desparate and stuck on these two problems. I would appreciate any help I can get. Thanks Solve by the elimination method 5r-6s=4 6r+5s=17 Solve by the substitution method 6x+7y=8 x=16-3y Click here to see answer by ankor@dixie-net.com(15647)

 Question 342246: i need help on trying to understanding how to evaluate each expression for the given values of the variables such as 7p-2t+3for p=6andt=2 can u simpleflie this for me please . Click here to see answer by mananth(12270)

 Question 342177: help solve 1/5 (x+3) = x - 5 Click here to see answer by Alan3354(30993)

 Question 342231: expressions 16t^2 models the distance in feet that an object falls during t seconds after being dropped. find the distance an object falls during each time. 0.25 seconds Click here to see answer by nyc_function(2733)

 Question 342401: how do I solve this equation ? 2-3x/5 < x+2, Click here to see answer by Fombitz(13828)