# Questions on Algebra: Inverse operations for addition and multiplication, reciprocals answered by real tutors!

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 Algebra: Inverse operations for addition and multiplication, reciprocals Solvers Lessons Answers archive Quiz In Depth

 Question 404713: I'm try to work the following problem. 12x -14y = -8 -8x -14y = 52 where x and y are the same number to solve both equations Click here to see answer by ewatrrr(10682)

 Question 406318: The weight in pounds p of an olbject with a mass m of 25 kilograms is given by the equation p/m = 2.2. How many pounds does the object weigh? Click here to see answer by stanbon(57387)

 Question 407396: F=1/t how do I solve to find out what t is? Click here to see answer by jim_thompson5910(28598)

 Question 410809: Hi having a difficult time trying to explain this problem to my child... the question says," What numbers belong in the blanks in the following equation? What is the value of a ?" a ÷ 6 ·__ = 5 ·__ Click here to see answer by stanbon(57387)

 Question 414987: how to solve that? 2x + y = 6; y Click here to see answer by praseenakos@yahoo.com(507)

 Question 415416: the perimeter of a rectangular field is 246 meter and the length is 2 times longer then it is wide. find the length and width. Click here to see answer by praseenakos@yahoo.com(507)

 Question 415754: use multiplication principle to solve equation;n x 4/15= 12/15 Click here to see answer by stanbon(57387)

 Question 415948: This is the only inverse-related section, so, here goes: Find the inverse function of Y = (exp)3(sqrt)2x+1 I get that you turn f(x) into Y, and replace the X with Y, and vice versa; then move the (exp)3 onto the Y to get rid of the square root. So, it then becomes: X^3 = 2Y+1 After that, I'm lost. If I subtract the 1, it becomes X^3-1 = 2Y, but, I can't divide by 2 because there needs to be an X in the denominator. Click here to see answer by stanbon(57387)
 Question 415948: This is the only inverse-related section, so, here goes: Find the inverse function of Y = (exp)3(sqrt)2x+1 I get that you turn f(x) into Y, and replace the X with Y, and vice versa; then move the (exp)3 onto the Y to get rid of the square root. So, it then becomes: X^3 = 2Y+1 After that, I'm lost. If I subtract the 1, it becomes X^3-1 = 2Y, but, I can't divide by 2 because there needs to be an X in the denominator. Click here to see answer by jim_thompson5910(28598)

 Question 416983: how do you transform formulas from Ax+By=C form to y=mx+b form plz help Click here to see answer by josmiceli(9697)

 Question 417862: find the inverse (if it exists) of f(x)=5x-4 Click here to see answer by MathLover1(6638)

 Question 420085: In order to earn an A in a class, your test scores must average at least 92%. On the first 6 tests, you have an average of 91%. What score do you need to get on the last test to earn an A? Show your work. Well I tried it myself And I think it's set out like this: 91+6=>92 I don't know If this is the right way to set it up. =/ Click here to see answer by stanbon(57387)
 Question 420085: In order to earn an A in a class, your test scores must average at least 92%. On the first 6 tests, you have an average of 91%. What score do you need to get on the last test to earn an A? Show your work. Well I tried it myself And I think it's set out like this: 91+6=>92 I don't know If this is the right way to set it up. =/ Click here to see answer by josmiceli(9697)
 Question 420085: In order to earn an A in a class, your test scores must average at least 92%. On the first 6 tests, you have an average of 91%. What score do you need to get on the last test to earn an A? Show your work. Well I tried it myself And I think it's set out like this: 91+6=>92 I don't know If this is the right way to set it up. =/ Click here to see answer by Edwin McCravy(8909)

 Question 424970: I am not sure if this equation was done right. Here it is 1/3+1/2 ------- 5/9-1/3 Do I add the first equation to get that answer, subtract the second equation and take both answers and Divide them? Here is what I have on my sheet: 1/3+1/2 2/6+3/6 5/6 -------= -------= ---=5/6 * 9/2 = 5/6 * 27/6 = 45/12 ? 5/9-1/3 5/9-3/9 2/9 Is this any where close to being right? Click here to see answer by Alan3354(30993)

 Question 426119: Show two different ways Kelly can find the sum of 7+8 Explain your thinking and Pam solved 12+6 and got 18. Jake is solving 6+12. He is sure that his sum will be the same. Is he right? How do yoiu know? Click here to see answer by richard1234(5390)

 Question 427177: Im doing functions and their inverese and i need help. Click here to see answer by rfer(12670)

 Question 432376: If two numbers are opposite of each other, are their reciprocals also opposite of each other? Click here to see answer by rapaljer(4667)

 Question 434173: solve using the multiplication principle -6x < -30 Click here to see answer by stanbon(57387)

 Question 436184: if log a = -1 and log b = 4 a) is log sqrt(a)/b^2 a real number? b) if so, find its numerical value. Click here to see answer by stanbon(57387)

 Question 436182: find the inverse of y = exp2 (x-7) + 1 Click here to see answer by stanbon(57387)

 Question 436181: Find f-1(x) for f(x) = 2x+1/x-3, where x does not equal 3. Click here to see answer by stanbon(57387)

 Question 436545: The number of miles per gallon of gasoline that a vehicle averages varies inversely as the average speed the car travels. A vehicle gets 13 miles per gallon at 52 mph. How many miles per gallon will it get at 54 mph? A) 0.08 miles per gallon B) 12.5 miles per gallon C) 0.07 miles per gallon D) 13.5 miles per gallon E) none of the above Click here to see answer by rwm(914)

 Question 437163: 3y=15x-12 write an equation as a function in "y=...." form Click here to see answer by oberobic(2304)

 Question 437731: Solve for x. log3 (x+4) x log3 (x-4) = 0 Check the validity of each solution in the original equation. Click here to see answer by stanbon(57387)

 Question 437730: Solve for x. log3 (x+4) - log3 (x-4) = 1 Check the validity of each solution in the original equation. Click here to see answer by stanbon(57387)
 Question 437730: Solve for x. log3 (x+4) - log3 (x-4) = 1 Check the validity of each solution in the original equation. Click here to see answer by Gogonati(809)

 Question 437729: Solve for x. log3 (x+4) + log3 (x-4) = 1 Check the validity of each solution in the original equation. Click here to see answer by stanbon(57387)

 Question 437728: Solve for x. log2 (7+2x) + log2 (4x-1) = 3 Check the validity of each solution in the original equation. Click here to see answer by ewatrrr(10682)

 Question 438271: Write an equation of the inverse relation. f(x) = 109 - 5x / 5 + 3x Click here to see answer by stanbon(57387)