Answer:

1: C

2: D

3: A

4:B

Step-by-step explanation:

**Answer:**

Besides the standard multiplication, at least there are two other alternative existed: Box model method and Block method.

**Step-by-step explanation:**

I'm sure there are other alternatives, but I wish this will have a little help.

9514 1404 393

**Answer:**

6

**Step-by-step explanation:**

The slope of the line between (3, 3) and (4, 9) is given by the slope formula:

m = <average rate of change> = (y2 -y1)/(x2 -x1)

m = (9 -3)/(4 -3) = 6/1

m = 6

**The average rate of change on the interval [3, 4] is 6**.

**Answer:**

**Step-by-step explanation:**

x = 5 or 8 y = 8