Posted by confused.... on Saturday, September 8, 2007 at 2:22pm.
If a * b = a  3b and a # b = 2a + 3b, evaluate the expression (4 * 3) # 5.
If y # y = 2x + 3y and x * y = 5x + 4y, evaluate the expression 2 # (4 * 3).
Please help! Try to explain how I should solve these  don't just give me the answer. These problems showed up in my math book, and my teacher didn't teach us how to do those in the lesson. And, first of all, what does # mean in a problem like this? Thank you.

Advanced Math I  bobpursley, Saturday, September 8, 2007 at 3:24pm
4*3=43*3=5 according to the rules.
5#5= 2*5 + 3*5 or 5 according to the rules.
# is the symbol for an unknown math operator, defined as a#b=2a + 3b

Advanced Math I  confused..., Monday, September 10, 2007 at 3:48pm
hmm...interesting. sorry to say, I still don't get this! thank you for your help, though, Bob.
my math teacher ending up explaining this today (after he took a homework completion grade  of course I hadn't been able to do the problem!)and then I just checked and read your explanation, and I still don't get it. can somebody please help?
Answer This Question
Related Questions
 6th grade advanced math  1) /3/____ 3 //= what's the absulute value of. In ...
 math 115  1. divide 36/4= 9 is this correct? 2. evaluate the expression 5 +3...
 math 115  1. evaluate exactly square root 100 square root64 = 10 8 = 2 is ...
 Evaluate the expression.Algebra  Evaluate the expression. (9/6) (6/4) (3/1) I ...
 Math  Write an algebraic expression for each word phrase on the board. Evaluate...
 math 115  1.evalute the expression 8 + 15 = 7 is this answer correct? 2....
 Math. Need help  1.if g=5 and k=1, evaluate 9+gk a. 13 b. 14 c. 15 d. 16 2....
 statistics  Lilly collects data on a sample of 40 high school students to ...
 statistics  Lilly collects data on a sample of 40 high school students to ...
 statistic  Lilly collects data on a sample of 40 high school students to ...
More Related Questions