1.Β 4 (6 + 7) is the same as (4 β’ 6) + (4 β’ 7)
Β Β XΒ = 4
2. 6 β’ 45 = 270
a. 270, (6 β’ 40) + (6 β’ 5) = 240 + 30 = 270
b. 210, (6 β’ 40) - (6 β’ 5) = 240 - 30 = 210
c. 270, (6 β’ 50) - (6 β’ 5) = 300 - 30 = 270
Β Β A. 270, C. 270
3. 6m + 7n + 5m - 3n, combine like terms, 6m + 5m = 11m, 7n - 3n = 4n
Β Β B. 11m + 4n
4. 2y^3 - 4y^2 + y + y^3, exponents tell you what are like terms
Β Β C. 2y^3 and y^3
5. 4x^3 - 3x^2 + x + 3x^3, combine like terms, then put in descending order
Β Β D.Β 7x^3 - 3x^2 + x