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 Algebra Pre-Algebra and Basic Algebra Math Forum

 March 29th, 2014, 08:12 AM #1 Newbie   Joined: Mar 2014 From: London Posts: 2 Thanks: 0 Please this is urgent!! IMPORTANT NOTE In the following, x^2, x^3, mean "x squared", "x cubed", respectively. Generally, a^n means "a to the power n". 1. Y is proportional to (1 - X). When X = 2, Y = -2. Find the value of X required to give Y = 6. 2. Z is proportional to (X - 2). When X = 1, Z = 1. Enter the value of X required to give Z = -2. 3. X is inversely proportional to Y. When X = 2, Y = 3. Find the value of Y required to give X = 4 [Express your as a decimal correct to 2sf 4. V is proportional to (T+1)^2. When T= 1, V = 1. Enter (as a decimal) the value of V when T = 2. March 29th, 2014, 10:16 AM #2 Math Team   Joined: Jul 2011 From: North America, 42nd parallel Posts: 3,372 Thanks: 233 The words 'a is proportional to b' translate So your question 1) translates Make the substitutions from the given info and solve for k So the relation for 1) is Now use Y = 6 to solve for X Your question 2) is done similarly. The words 'a is inversely proportional to b' translate So your question 3) translates Proceed as i have done for question 1) , substitute the given info , solve for k , then use the relation to solve for Y. For your question 4) you should get Now do as shown above.  Tags urgent Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post bogazichili Advanced Statistics 0 April 3rd, 2009 01:38 AM tcabaco Algebra 1 March 2nd, 2009 03:52 AM nikolany Number Theory 2 November 5th, 2008 11:51 PM gladtoknow Algebra 1 November 5th, 2008 12:30 PM kingdomofthenight Advanced Statistics 1 September 18th, 2008 03:04 PM

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