6
explain how to evaluate an algebraic expression for given variables. how would we evaluate the expression "3x-4y+9" when x=2and y=5?
11
No whole numbers multiply to equal 13 but 2 x 6.5 can equals 13 * * * * * Not quite true: 1 x 13 = 13
2x+3y=13 3x-y=3 x=2
6 + 12 - 5 = 13
6
2xy=2*30*2=120
x = -2
to evaluate 5 squared you must simply do 5x5. Which equals 25.
-qr(r - 2)(r + 2)
2*3*4 = 24
explain how to evaluate an algebraic expression for given variables. how would we evaluate the expression "3x-4y+9" when x=2and y=5?
11
5
5
1