# 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 387009: the size of subsets of a set: If a given set has twelve elements, how many of its subsets have the given numbers of elements? a) at most two elements. Click here to see answer by stanbon(57377)

 Question 386997: Perform the indicated operation and simplify a/(a^2-2a+1) + 1/(a^2-5a+4) Click here to see answer by ewatrrr(10682)

 Question 387494: Joe has a collection of nickels and dimes that is worth \$8.55. If the number of dimes was tripled and the number of nickels was deceased by 2, the value of the coins would be \$10.45. How many nickels and dimes does he have? Click here to see answer by stanbon(57377)

 Question 388253: How far will a tank moving at 18 miles per hour travel in 6 hours? Click here to see answer by edjones(7569)
 Question 388253: How far will a tank moving at 18 miles per hour travel in 6 hours? Click here to see answer by Alan3354(30993)

 Question 387845: Walnuts are 2.25/lb and Almonds are 2.40/lb. You want to create a mixture that equals 120 lbs at 2.30/lb. How do you solve this word problem? Click here to see answer by Fombitz(13828)

 Question 387907: Find all values fo the missing digit that make the starment true. 5, 33 _ is divisible by 11 Click here to see answer by robertb(4012)

 Question 387837: Kelly's weight is 10 pounds less than twice her daughter's weight. Kelly weighs 130 pounds. Write an equation to find the daughter's weight. Click here to see answer by Fombitz(13828)

 Question 388669: You have administered a standardized test of manual dexterity to two groups of 10 semi skilled workers. One of these two groups of workers will be employed by you to work in a warehouse with many fragile items. The higher the manual dexterity of a worker the less likelihood that worker will break significant inventory. Because of a unique contract you must hire all 10 employees from one of the two groups and none of the employees from the other. Group A Scores Group B Scores 63 79 64 83 87 81 89 75 91 78 98 89 26 65 100 93 59 60 100 100 Click here to see answer by stanbon(57377)

 Question 388763: If a flagpole is 16 meters from the center of a long straight hedge, how many trees can be planted so that each tree is exactly 20 meters from the flagpole and 4 meters from the centre line of the hedge? Click here to see answer by Alan3354(30993)

 Question 388813: No knowledge of algebra! Can you advise how to solve x-y = 60 (when x is 4 times y) Click here to see answer by JimboP1977(308)

 Question 388899: the horsepower produced by a steam engine varies directly as the number of revolutions per minute of its operation. if 1200 horse power was produced when a machine was operated at 150 revolutions per minute, find the number of horse power it will produce when it will operate at 170 revolutions per minute? Click here to see answer by stanbon(57377)

 Question 388954: what is the natural domain of f(x)=x^2-25 and g(x)=sqrt of x-2 over sqrt of x^2-25. the two equations are different problems Click here to see answer by stanbon(57377)

 Question 389173: The sum of the lengths of two line segments is 24.If the length of one of these segments is represented by x,which expression represents the length of the second segment? My answer is 24-x My friend says x-24 Who is right ? Thank you. Click here to see answer by jim_thompson5910(28595)

 Question 389216: kevin is 5 years older than maria. four times maria's age is 2 more than twice kevin's age. how old are maria and kevin? Click here to see answer by ewatrrr(10682)

 Question 389674: how do i solve this factored form quadratic funtion (2x + 3)(3x − 7)? Click here to see answer by richard1234(5390)

 Question 389730: suppose that the position of a roller coaster travelling downhill can be modeled by the function f(x) = 88 - 16x^2. Use a graphing calculator to graph the function and find the area under the curve for the domain 0 < or equal x < or equal to 2.3 is the approxiamate time in seconds it takes for the coaster to get to the bottom of the hill. Click here to see answer by richard1234(5390)

 Question 389728: consider the sequence 1, 2/3,3/5,4/7,5/9,... describe the pattern formed in the sequence, find the next 3 terms. Click here to see answer by richard1234(5390)

 Question 389731: a scientist develops a formula which can turn a light bulb into a camel.working alone it takes the scientist 4 hours to create one dose of formula.the scientist assistant can make one dose in 12 hours. how long working together will it take the scientist and his assistant to create one dose of formula? please answer the question by using a table and the 5 step method. thank you. Click here to see answer by stanbon(57377)

 Question 389902: Find the sum of all intergers between 1 and 200 that are divisible by 6 Click here to see answer by ewatrrr(10682)

 Question 389997: Kayla's I.Q. is 27 points about Terry's. Their combined I.Q. score is 267. What is each of their I.Q. scores? I've tried making th equation as : K + T = 27 K + T = 267 But whenever I tried to solve it ( for T ) It ended up with a positive T minus a negative T , which didn't make sense. All I really need is to know how you set up the equation, from there I could solve. Please and thank you for your help! Click here to see answer by jim_thompson5910(28595)

 Question 390760: Show that 1 greater than the sum of the squares of any three consecutive integers is always divisible by 3. Click here to see answer by richard1234(5390)

 Question 390610: A biology class did a survey of an open field for the number of visible insects per square ft. of ground. The results were normally distributed. The mean was 28 insects and the standard deviation was 5. What values are 1 standard deviation from the mean? Click here to see answer by robertb(4012)

 Question 390991: How do i solve for a? 9= -7 -2a +a Click here to see answer by ewatrrr(10682)

 Question 391214: A single microscopic organism divides into two organisms every 3 days. Use the formula N(t)= No(2)^t/3 Where t is the time of day , N(t) is the number of organisms at t days, and No is the number of organisms at t = 0. Approximately how long would it take one organism to produce a population of about 10,000 organisms? Click here to see answer by josmiceli(9691)

 Question 391625: Shantel Jones has two job offers as a car salesperson. At one dealership, she will receive \$600 per month plus a commisionof 2% of the total price of the automobiles she sells. At the other dealership, she will receive \$1000 per month plus a commision of 1.5% of her total sales. Explain which job offer is better. Click here to see answer by mananth(12270)

 Question 391616: At the endof the 2000 baseball season, the New York Yankees and the Cincinnati Reds had won a total of 31 World Series. The Yankees had won 5.2 times as many World Series as the Reds. How many World Series did each team win? Click here to see answer by edjones(7569)

 Question 391607: MX Labs needs to make 500 gallons of 34% acid solution. The only solutions available are a 25% acid solution and a 50% acid solution. How many gallons of each solution should be mixed to make the 34% solution? Click here to see answer by lwsshak3(6513)

 Question 391716: A boat travels a certain distance upstream in 5 hours, and the same distance down stream in 3 hours. If the speed of the boat is 18 mph, what is the speed of the current (in mph) ? Click here to see answer by chrisrao(11)