# 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 292774: If a trucker drives 500 miles in x + 1 hours, then what is his average speed? Click here to see answer by dabanfield(803)

 Question 292788: The ration of women to men in a certain club is 3 to 2. If there are 24 male club members, then how many female club members are there? Click here to see answer by richwmiller(9143)

 Question 292937: simplify five to the second power minus four to the third power minus three divided by nine to the second power minus two to the second power minus one to the fifth power. Click here to see answer by richwmiller(9143)

 Question 293025: The weight, w, of a certain substance varies directly with the volume, v, of the substance. If the weight of a sample of substance is 35 grams and the volume of the sample is 56 milliliters, what is the equation that represents the relationship betweeen w and v??? Click here to see answer by stanbon(57387)

 Question 293229: Perform the indicated operation and simplify: a) square root of -54 b) i^53 c) (3i)^7 d) (5-3i)-(2-3i) e) (3-2i)^2 f) square root of x-1 + square root of x = 1 I would appreciate any help. Thanks in advance! :) Click here to see answer by stanbon(57387)

 Question 293510: i need help figureing out the area of this trpezoid. A=1/2h(b1+b2);b1 Click here to see answer by stanbon(57387)

 Question 293570: John has 1121 points in his math class. He must have 88% of the 1400 points possible by the end of the term to receive credit for the class. What is the minimum number of additional points he must earn by the end of the term to receive credit for the class?? Please use an inequality and please use the five-step problem solving process to answer this question. Thanks Click here to see answer by richwmiller(9143)

 Question 293598: I need help with this word problem please. "An actor invests some money at 5% and \$27000 more than four times the amount at 11%. The total annual interest earned from the investment is \$36780. How much did he invest at each amount?" Thank you for anything you can do. Click here to see answer by nerdybill(6962)

 Question 293673: John has 1121 points in his math class. He must have 88% of the 1400 points possible by the end of the term to receive credit for the class. What is the minimum number of additional points he must earn by the end of the term to receive credit for the class?? Please use an inequality and please use the five-step problem solving process to answer this question. Thanks'' Click here to see answer by stanbon(57387)

 Question 293636: John has 1121 points in his math class. He must have 88% of the 1400 points possible by the end of the term to receive credit for the class. What is the minimum number of additional points he must earn by the end of the term to receive credit for the class?? Please use an inequality and please use the five-step problem solving process to answer this question. Thanks''. Click here to see answer by ankor@dixie-net.com(15660)

 Question 294009: I have a complex fraction and I do not think I am simplifying right, please help me. -(4)/(x-1)+(2-2x)/x I get -2(x^2+1)/(x-1)x I do not think my answer is simplified as low as possible? Click here to see answer by stanbon(57387)

 Question 294417: Perform the indicated operation and simplify your answer. Can you help me with this, please? + Note: x-4 is the numerator, but I couldn't get the x- to go up top. Click here to see answer by richwmiller(9143)

 Question 294584: solve for the positive values of 'z'. 2zy = 14 --- --- Y2 y Click here to see answer by Alan3354(30993)

 Question 294668: x^1/2-x=6 Im sorry I had to replace the radical but I could not find any key for that function. Thanks alot Click here to see answer by helpnalgebra(91)

 Question 295137: Solve the following system by the substitution method. x+3y=2 -x+y=1 Click here to see answer by edjones(7569)

 Question 295317: Perform the operation and simplify the answer. Hi, I need help with this. Thank you. Click here to see answer by jim_thompson5910(28598)

 Question 295323: Solve by the factoring method. Can you help me with this? Click here to see answer by Fombitz(13828)

 Question 295581: I need help with this problem please. Write a system of two equations in two unknowns for each problem. Solve each system by the method of your choice. Ziggy's Famous Yogurt blends regular yogurt that is 3% fat with its no-fat yogurt to obtain low-fat yogurt that is 1% fat. How many pounds of regular yogurt and how many pounds of no-fat yogurt should be mixed to obtain 60 pounds of low-fat yogurt? Click here to see answer by mananth(12270)

 Question 295590: find two consecutive negative integers whose product is 132 Click here to see answer by mananth(12270)

 Question 295615: college algebra solve each system by the addition method. Determine whether the equation are independent, dependent, or inconsistent. x-y=3 -6x+6y=17 Click here to see answer by richwmiller(9143)

 Question 295570: Evaluate the veriable expression when b=9 and c=-3. 3c^2-2(b/c) Click here to see answer by Fombitz(13828)

 Question 295889: I need help with this problem please. Write a system of two equations in two unknowns for each problem. Solve each system by the method of your choice. The probability that San Francisco plays in the next Super Bowl is nine times the probability that they do not play in the next Super Bowl. The probability that San Francisco plays in the next Super Bowl plus the probability that they do not play is 1. What is the probability that San Francisco plays in the next Super Bowl? Click here to see answer by Theo(3464)

 Question 295960: How do I solve the following problem? I need 100 pounds of mixed nuts (peanuts and cashews). The peanuts will cost me \$3.00 per pound and the cashews will cost me \$4.00 per pound. How do I find out how many pounds of each kind of nut I should buy? How can I set up a system of equations to find the correct solution? Click here to see answer by richwmiller(9143)
 Question 295960: How do I solve the following problem? I need 100 pounds of mixed nuts (peanuts and cashews). The peanuts will cost me \$3.00 per pound and the cashews will cost me \$4.00 per pound. How do I find out how many pounds of each kind of nut I should buy? How can I set up a system of equations to find the correct solution? Click here to see answer by Theo(3464)

 Question 295989: 1 . Multiply What do you think, sir ? Is it all correct ? Thanks !! Click here to see answer by richwmiller(9143)

 Question 295991: Factor 72x^2 + xy – y^2. A. prime B. (9x – y)(8x – y) C. (9x + y)(8x – y) D. (9x – y)(8x + y) Click here to see answer by richwmiller(9143)

 Question 296010: A cylindrical drum has a diameter of 3ft and a volume of 45 cubic ft. What is the height of the drum? Please show your work. Thanks. Click here to see answer by Deina(147)

 Question 296007: A semicircular window of a radius 14 inches is o be laminated with a sunblock coating that costs \$.70 per square inch to apply. What is the total cost of coating the window to the nearest cent? Please show your work. Thanks. Click here to see answer by richwmiller(9143)
 Question 296007: A semicircular window of a radius 14 inches is o be laminated with a sunblock coating that costs \$.70 per square inch to apply. What is the total cost of coating the window to the nearest cent? Please show your work. Thanks. Click here to see answer by checkley77(12569)

 Question 296006: The national debt of a small country is \$8,948,000,000 and the population is 2,355,000. What is the amount of debt per person? Please show your work on how you got your answer. Thanks. Click here to see answer by checkley77(12569)