18. If a+b=3 and ab=2, then what is the value of a?-ab +b??
1)3 b) 5
c) 9
d) 13

Simonne used the following steps to simplify the given expression. 12 - 3(-2x + 4) step 1: 12 + (–3)·(–2x) + (–3)·(4) step 2: 12 + 6x + (–12) step 3: 12 + (–12) + 6x step 4: 0 + 6x step 5: 6x what property of real numbers was used to transition from step 3 to step 4? a. identity property of addition b. inverse property of addition c. associative property of addition d. commutative property of addition

Use set buikder notation to represent the following set: {, -2, -1, 0}

What is the difference between regular convex and concave polygons