Questions on Word Problems: Evaluation, Substitution answered by real tutors!

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 Word Problems: Evaluation, Substitution Solvers Lessons Answers archive Quiz In Depth

 Question 379297: The width of a rectangle is fixed at 8 ft. What lengths will make the perimeter at least 200 ft? at most 200 ft? My text does not really explain how to work this problem. could you please demonstrate how to solve this? Click here to see answer by mananth(12270)

 Question 379973: y=5x-8 5y=2x+6 i dont understand how to substitute.. i think its solve for y.. then substitute it in the second equation.... right? Click here to see answer by stanbon(57967)
 Question 379973: y=5x-8 5y=2x+6 i dont understand how to substitute.. i think its solve for y.. then substitute it in the second equation.... right? Click here to see answer by robertb(4012)

 Question 380012: Find the polynomial of lowest degree whose roots are 2i and 8i Click here to see answer by richard1234(5390)

 Question 380168: i am a 4 digit no. my first and last digits are the same. my two middle digits are equal,too. the products of my digits is 100. and their sum is 14. what no. am I? Click here to see answer by robertb(4012)

 Question 380150: if you buy 6 pens and w mechanical pencil you only get \$1 change from a \$10.00 bill, but if you buy 4 pens and 2 mechanical pencils you only get \$2.00 change. How much does each pen and pencil cost? Click here to see answer by solver91311(17077)

 Question 380317: Please help me with this problem: A cyclist bikes x distance at 10 miles per hour and returns over the same path at 8 miles per hour. What is the cyclist's average rate for the round trip in miles per hour? They say the answer is 8.9. How did they get this? Click here to see answer by richard1234(5390)

 Question 380375: 1. x+y=10 2. x=y-1 y=x+8 y=4-2x 3. x=y+6 4.y=2x-5 y=-2-x 3y-x=5 5. y=2x+1 6.x=-2y x+y=-2 x=2-4y *can you please use SUBSTITUTION for all of them thanks for you help!!!!!!!!!!! Click here to see answer by Alan3354(31518)

 Question 380376: 2. x=y-1 y=4-2x 4.y=2x-5 3y-x=5 6.x=-2y x=2-4y *can you please use SUBSTITUTION for all of them thanks for you help!!!!!!!!!!! Click here to see answer by Alan3354(31518)

 Question 380380: okay so i need help with solving this: Tim and Mary paddled a canoe 6 miles upstream in 4 hours.The trip back took 3hours.Find the rate at which they paddled in still water?? Click here to see answer by mananth(12270)

 Question 380967: A student receives his grade report from a local community college, but the GPA is smudged. He took the following classes: a 2 hour credit art, a 3 hour credit history, a 4 hour credit science course, a 3 hour credit mathematics course, and a 1 hour science lab. He received a B in the art class, an A in the history class, a C in the science class, a B in the math class, and an A in the science lab. What was his GPA if the letter grades are based on a 4 point scale? (A = 4, B = 3, C = 2, D = 1, F = 0) Click here to see answer by Theo(3504)

 Question 381349: what is the approximate surface area of an open piece of pipe with a radius of 4 cm and a length of 9 cm? Click here to see answer by richard1234(5390)

 Question 381612: james has a total of 12 bills in his wallet.some are 5's some are 10's.total value is 115.00. how many fives and how many 10 does he have Click here to see answer by ewatrrr(10682)

 Question 382025: Two cars leave town going in opposite directions. Car A travels at 56 mi/h and car B travels at 75 mi/h. In how many hours will they be 350 miles apart? Click here to see answer by rfer(12730)

 Question 382829: A grain storage warehouse has a total of 30 bins. Some hold 20 tons of grain each, and the rest hold 15 tons of grain each. How many of each type of bin are there if the capacity of the warehouse is 510? Click here to see answer by mananth(12270)

 Question 382940: write the partial fraction decomompasitionof the rational function (2x+3)/x^2+3x+2? Click here to see answer by Fombitz(13828)
 Question 382940: write the partial fraction decomompasitionof the rational function (2x+3)/x^2+3x+2? Click here to see answer by nyc_function(2733)

 Question 383117: What is the relationship between sample size, sample standard deviation, and standard error? Click here to see answer by stanbon(57967)

 Question 383477: ten years ago, a person was half as old as he is now. how old is he now? Click here to see answer by robertb(4012)

 Question 383526: John can finish his homework in 10 minutes. A fellow student would finish it up at a different rate. Both students working together can do the homework in 8 minutes. How long does it take the second student to complete the homework if working alone? Click here to see answer by ankor@dixie-net.com(15746)

 Question 384028: 2 runners can average 8 and 10 yards per second respectively. if the slower runner was given 7 1/2 second head start in a race that ended in a tie, what was the distance they raced? Click here to see answer by mananth(12270)

 Question 385041: will you please show me the whole process of four consecutive odd integers whose sum is -8 Click here to see answer by richard1234(5390)
 Question 385041: will you please show me the whole process of four consecutive odd integers whose sum is -8 Click here to see answer by rfer(12730)

 Question 385405: Can I please get some help with this problem. Solve the following system of two linear equations. i need if there is a solution please. I need assistance with the addidtin method please.. 5x-6y= 40 3x+2y=8 Thank you so much.. Click here to see answer by nerdybill(7003)

 Question 385643: Can you assist with the following word problem. I was able to determine the answers by trial and error, but I was not able to create an expression. The problem is: George bought a pair of binoculars and carrying case for \$103.75. The binoculars cost \$53.99 more than the case. How much did the binoculars cost? Thanks. Click here to see answer by rfer(12730)

 Question 386329: Mental Math, I am not sure how to find the sum of this problem or if I am doing it correctly. 9/10 5/9 + Click here to see answer by rfer(12730)

 Question 386312: Hi can you help figure out what is the best way to use the definition of subtraction to rewrite the subtraction equation as an addition equation. 34- 6 = x Click here to see answer by rfer(12730)

 Question 386389: Can I please get some help? Find the Zeros of f(x)= x3 -4x2+ 2x+ 4. Thank you. Click here to see answer by Alan3354(31518)

 Question 386395: Can i get some help please? Find the equation of the following lines: The line that contain the following (-2,1) and and is perpendicular to the line= -2x+7 Thank you, Click here to see answer by solver91311(17077)

 Question 386393: Can i get some help please? Find the equation of the following lines: The line that contain the following (2,5) and (11,-1) Thank you, Click here to see answer by solver91311(17077)
 Question 386393: Can i get some help please? Find the equation of the following lines: The line that contain the following (2,5) and (11,-1) Thank you, Click here to see answer by rfer(12730)

 Question 386385: Can I please get some help? Cosider the following arithmetic sequences: 3, 7, 11, 15, 19..... What is the 199th term a199, of this sequence. Find the sum of the first 199 term of this sequence. Thank you Click here to see answer by robertb(4012)

 Question 386491: An ordinary die is tossed four times. What is the probability of obtaining a number greater than 4 at least once? Click here to see answer by richard1234(5390)

 Question 386541: -2+y=3x 4x+2y=8 the other one is wrong. i need to find out what (x,y) are, and the steps to doing it. Thanks Click here to see answer by Fombitz(13828)

 Question 386708: i took 7 tests. my median score is 90. the range of scores is 18. what are the 7 test scores? Click here to see answer by jim_thompson5910(28715)

 Question 386792: If i took a test with 190 points and got 70% of the problems right, how many points did i get wrong? Click here to see answer by armstrkl(28)

 Question 386957: A RECTANGLE IS 5 FEET LONGER THAN IT IS WIDE. IF ITS PERIMETER IS 22 FEET FIND THE DIMENSIONS OF THE RECTANGLE! Click here to see answer by tara0066(31)

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