# 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 467075: Determine and Solve a system of equation in three variables & define the variables: The sum of three numbers is none. Two times the first number plus the second number less the third number is 30. Three times the first number subtract four times the second number plus two times the third number is -49? Click here to see answer by mananth(12270)

 Question 467218: Write an equation in point-slope form of the line through points (4, -4) and (1, 2). Use (4, -4) as the point (x([subscript] 1), y([subscript] 1). a) (y-4) = -2(x+4) b) (y-4) = 2(x+4) c) (y+4) = 2(x-4) d) (y+4) = -2(x-4) Click here to see answer by Big Poop(157)

 Question 467127: what is your basis for choosing a career in science or in a science related field? Click here to see answer by asuar010(324)

 Question 467341: Written below is a question from my summer homework. I know that the equation will involve adding 68 to something times 0.08, so C. seems to be the correct choice, but I can't say for sure. Besides, even if C. is correct, why must 0.08 be multiplied by the quantity of 252-142? I'd appreciate your help! Each week Ian earns a 8% bonus on any sales Ian makes over \$142. Ian also receives a fixed salary of \$68 per week. If Ian sold \$252 worth of merchandise in a week, which equation could be used to determine Ian's total earnings, x, for the week? A. 8 + 0.68(142-252) = x B. 8 + 0.68(252-142) = x C. 68 + 0.08(252-142) = x D. 68 + 8 + (142-252) = x Click here to see answer by jorel1380(2518)

 Question 467470: Suppose that the length of a rectangle is two and two-ninths times as long as its width. The area of the rectangle is 1620 square centimeters. Find the length and width of the rectangle. Click here to see answer by jorel1380(2518)

 Question 467475: Is the following function even, odd or neither? f(x) = 4x + 1 Click here to see answer by robertb(4012)

 Question 467476: Given the following function find f(-4) =? and f(6) = ? ff(x) = 3x-2 if x _< 0 (the line goes under the sign) 2x if x > 0 Click here to see answer by robertb(4012)

 Question 467495: x^2 - 7x + 10 < 0 solve the following inequality and write the solution in interval notation Click here to see answer by lwsshak3(6508)

 Question 467608: Hi I need some help with my homework I would grately appreciate it.. 1.the expression 2x(exponent 2)-x(exponent 2) is equivalent to.. Than you for your time! Click here to see answer by jorel1380(2518)

 Question 467634: Use scientific notation to divide the two numbers. Express answer using scientific notation; retain at least three decimal places. Please show all work. (8.7•10^9)•(3.22•10^2) Click here to see answer by rfer(12660)

 Question 467931: what would be the percentage if you get 762 points out of 1000 Click here to see answer by Alan3354(30993)

 Question 468071: The pitch of a roof is the ratio of the rise to the half-span. If a roof has a rise of 6 feet and a span of 30 feet, what is the pitch? Click here to see answer by rfer(12660)

 Question 468132: 22. Solve the following inequalities for x. Be sure to include a written check in your answer: x - + 4 > 0 3 23. -2x < 6 Solve the problems below. Be sure to include a check of your answer. (Remember, for or solutions you will need to check two values. ) 24. | x-1 | < 4 25. | 2x + 5 | > 7 26. | 3 - x | = 20 Click here to see answer by Gogonati(809)

 Question 468240: If Tom gives Mary 15 cents, they will have equal amount of money. But if Mary then gives Tom 50 cents, he will have twice as much money as she does. How much money does each have? Click here to see answer by lwsshak3(6508)

 Question 461497: Please help me solve the following word problem I'm stuck : The sum of three numbers is 65. One number is 10 more than the second number. It is also twice the third. Find each of the three numbers??? Thank you!! :) Click here to see answer by lwsshak3(6508)

 Question 468567: A camera is priced at P15,000.00 subject to 10% and 5% trade discounts. Determine the: a. additional trade discount rate that would bring down the price further to P12,440.25 b. single equivalent rate of the three discount rates Click here to see answer by Tatiana_Stebko(1326)

 Question 468573: Company A offers to deliver an order of goods at a list price of P54,000.00 less 12%, 7% and 4% discounts. Company B offers to deliver similar goods at the same list price less 15%, 5% and 3% discounts. a. Which company has the better offer? b. How much would be saved by taking advantage of the better offer? Click here to see answer by rfer(12660)

 Question 468572: A table is to be sold at P8,500.00. At what price should it be listed to allow a discount series of 15%, 8% and 3%? Click here to see answer by rfer(12660)

 Question 468759: This question is about Factoring the sum and difference of two cubes. 8a(cube)- 64 = Click here to see answer by algebrahouse.com(1079)

 Question 468758: This question is about Factoring the sum and difference of two cubes. b(cube) +125 = Click here to see answer by Alan3354(30993)

 Question 468757: This question is about Factoring the sum and difference of two cubes. 16(cube)-8 = Click here to see answer by Tatiana_Stebko(1326)

 Question 469047: carrie can inpsect a case of watches in 5 hours, james can inspect the same case in 3 hours. after working alone for 1 hour, carrie takes a break. after taking a 40 minute break, carrie and james work together to inspect the remaining watches. how long do carrie and james work together to complete the job? Click here to see answer by jorel1380(2518)

 Question 469050: on a map taht is drawn to scale, two towns that are x miles apart are represented as being 4 inches apart. if two other towns are x + 2 miles apart, how many inches apart would tehy be on the same map? Click here to see answer by jorel1380(2518)

 Question 469128: Nursing Majors The table below shows the number of male and female students enrolled in nursing at a university for a recent semester. Find the speciﬁed probability. Nursing Majors Non-Nursing Majors Total Males 135 1205 1340 Females 825 1964 2789 Total 960 3169 4129 3. The student is male or a non-nursing major. 4. The student is female or a nursing major. 5. A student is not male or a nursing major. 6. The student is male or a nursing major. 7. Are the events ”being male” and ”being a nursing major” mutually exclusive Click here to see answer by stanbon(57357)

 Question 469581: A man bought x ballons at y cents each. he sold all of them at 2 cents each. If x,y and z are all increased by 10%. Find the percentage increase in profit? Click here to see answer by Tatiana_Stebko(1326)

 Question 469775: The second angle of a triangle is three times as large as the first. The third angle is 20 degrees larger than the sum of the first two. Find the measures of the angle. Thank You Click here to see answer by rfer(12660)

 Question 469885: can you show me the steps for this equation? sqrt(x+3)= x+1 Click here to see answer by sofiyac(695)

 Question 469903: You only need to know the y-intercept to write the equation of a line, is this true or false? Click here to see answer by ewatrrr(10682)

 Question 469902: A line that passes thru the points (5,0) and (5,2) has an undefined slope True or false? Click here to see answer by ewatrrr(10682)

 Question 469901: If f(x) = x^2 + 3x, then f(-2) = 10. True? Click here to see answer by ewatrrr(10682)

 Question 469942: Is this correct? A linear equation, x = 5, is a horizontal line of a plane Click here to see answer by ewatrrr(10682)

 Question 469938: Is this correct? In the formula y = mx + b, mx is the slope Click here to see answer by MathLover1(6634)

 Question 469941: Is this correct? To find the equation of a line, all you need is a point and a slope Click here to see answer by ewatrrr(10682)

 Question 469936: Does every straight line have a slope that is defined? Click here to see answer by ewatrrr(10682)

 Question 469940: Is this correct? On a plane, every line is the graph of a linear equation in two unknowns Click here to see answer by sofiyac(695)

 Question 469935: Is this true? The graph of any linear equation in two variables is a straight line. Click here to see answer by sofiyac(695)