a) 2w + s
b) w stands for the number of wins, s stands for the number of shootout losses
*Just replace the variables with the given numbers.
*The combinations are for team B, and has to equal 28.
Then, we had a review about polynomials, their coefficients, variables, and exponents.
Here's a chart about that (we had to fill in the coefficients, variables, and exponents):
After that, Ms. Yoo, started us on unit 5.2. Which is equivalent expressions. But we talked about like terms first. What are like terms? Like terms are terms that differ only by their numerical coefficients.
*Variables, and it's power stay the same. Coefficients changes however.
3x and -2x
6y² and 3y²
-5xy and -2 xy
17 and 12
Here's are other examples featuring the variable x:
*Mathematicians are lazy, they don't like writing 1 in front of a variable.
Next, we had to identify like terms:
(like terms are colour coded, dark green, and blue)
a) 5b² 3bc -2b 7c 6b
b) 3x² 4xy -2x² 7x² 1/2 y
c) 3pq 11 -4q² -3 pq
Then, we were combining like terms. (the variables and coefficients are bolded, the constants are "slanted", while variables with higher power than 1 are left with regular font)
*4x-2x= 2x, +3-6= -3
b) 2x²+3x -1+x²-4x-2
-Always start with the highest degree (power)
-Try to gather like terms first
After, we had to simplify like terms.
1) x²-(-3x) +4+7x²-8x-6
x²+7x²-8x+3x+4-6 (<= work should look like that)
explanation: 7x²+x² is 8x², while -8x+3x is -5x, and 4+(-6) is -2
That's all we did in class. Hope I covered everything. Here's the homework:
-5.2 Extra Practice
-2 sheets (double sided)
-textbook work (since we don't have class tomorrow because of the Tec Voc tour)
-5.2 Mathlink (Mr. B didn't assign this, so do it if you have time)
-COMMENT ON MY POST!
*By the way, Friday's scribe is Melanie (since there's no math class tomorrow)