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 Test Calculators and Practice Answers archive Word Problems Lessons In Depth

 Question 402721: x-2y+10=0 and 5x+4y+8=0 I need the steps for solving by substitution Click here to see answer by stanbon(57960)

 Question 402901: Right now I'm working on a PSAT Practice Booklet and I'm not sure how to solve it. 0.30608 = (3/10^j) + (6/10^k) + (8/10^n) If j, k, and n are positive integers in the equation above, what is the value of j+k+n? Click here to see answer by jim_thompson5910(28705)

 Question 402591: If three gallons of grade A oil are mixed with seven gal of grade B oil the resulting mixture is worth 43 cents per gal. However, if three gal of grade A oil are mixed with two gal of grade B oil the resulting mixture is worth 46 cents per gal. Find the price per gallon of each grade. Click here to see answer by scott8148(6628)

 Question 402686: An engine burns 1.4 kg of gasoline per hour and yields 3.5 kW of power. Calculate the efficiency of the engine when the heating value of gasoline is 43 MJ/kg. PLEASE HELP Click here to see answer by scott8148(6628)

 Question 403327: Y=3x+11 y=-2x+1 I'm trying to solve this equtation using substitution Click here to see answer by MathLover1(6810)

 Question 403412: What r the steps to solving 3x+4equal 22 Click here to see answer by jim_thompson5910(28705)
 Question 403412: What r the steps to solving 3x+4equal 22 Click here to see answer by sofiyac(695)

 Question 403443: I am dealing with Binomial Theorem in my class and can't see to grasp it. I am having trouble with expanding expressions. Can you please help? the directions is to expand each expression and the problem is (x + y) to the 4th. Thank you for your time to help me. Click here to see answer by richard1234(5390)

 Question 403312: A plant can manufacture 75 golf clubs per day for a total daily cost of \$8,027 amd 100 golf clubs per day for a total daily cost of \$ 9,567. (a) assuming that daily cost and production are linearly related, write an equation for the total daily cost in terms of production. (b) how many clubs can they manufacture daily with the cost \$9000. Click here to see answer by stanbon(57960)

 Question 403481: when the reciprocal of three times a number is subtracted from the reciprocal of the subtracted from the reciprocal of thnumber, the results is one sixth.find the number Click here to see answer by ankor@dixie-net.com(15746)

 Question 403713: How To Improve my English (Speaking & Listing and Learning). plz help me Click here to see answer by sofiyac(695)

 Question 403709: if the half life is 18 years and the initial amount is 139, how much remains after 5 years...: calculus Click here to see answer by richard1234(5390)

 Question 403717: Find the zero to this problem x squared subtract one over x subtract three? Click here to see answer by richard1234(5390)

 Question 403901: A 240in. Pipe is cut into two pieces. One piece is three times the length of the other. Find the lengths of the pieces. Click here to see answer by josmiceli(9817)
 Question 403901: A 240in. Pipe is cut into two pieces. One piece is three times the length of the other. Find the lengths of the pieces. Click here to see answer by MathLover1(6810)

 Question 404036: You have 28 coins that are all nickels and dimes. The value of the coins is \$2.05 define variables and write a system of equations for this situation. Explain the steps necessary to solve the system in part (a) solve the system Click here to see answer by stanbon(57960)

 Question 404051: If i flip a fair coin 5 times there are 32 possible outcomes (2 for each flip) How many of those outcomes have no heads? How many of those outcomes show exactly three heads? Click here to see answer by stanbon(57960)

 Question 404035: how many different ways can you score 77 points in a football game? Click here to see answer by Edwin McCravy(8999)

 Question 404273: How do I find the vertex of this equation y=-3(x-2)^2-4 ? Click here to see answer by stanbon(57960)

 Question 404294: Find all two-digit numbers that give a sum of 154 when the original number and the number obtained by reversing its digits are added. Click here to see answer by stanbon(57960)

 Question 404361: Factor completely. Be sure to factor out the greatest common factor first if it is other than 1 3x^2 - 3xy - 6y^2 Click here to see answer by nerdybill(7003)

 Question 404350: Factor by grouping. 7ab - 35a + 6b - 30 Click here to see answer by Tatiana_Stebko(1326)

 Question 404352: Factor by grouping. 4xy - 20y - xa + 5a Click here to see answer by Tatiana_Stebko(1326)

 Question 404348: Factor by grouping. 6x^3 + 7x^2 - 24x - 28 Click here to see answer by Tatiana_Stebko(1326)

 Question 404360: Factor completely by first factoring out the greatest common factor and then factoring the trinomial that remains. a^2 + 6ab - 16b^2 Click here to see answer by ankor@dixie-net.com(15746)

 Question 404312: 4x-y=7. What is the slope intercept of that equation Click here to see answer by ankor@dixie-net.com(15746)

 Question 404378: Factor the four term polynomial : Pq - 3r + pr - 3q Click here to see answer by scott8148(6628)

 Question 404550: What is 2 3/4 - negative 1 and 1/2? Click here to see answer by stanbon(57960)

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