**Answer:**

no

**Step-by-step explanation:**

**Answer:**

b. ellipse; 3x^2 + y^2 + 6x - 8y + 13 = 0

**Step-by-step explanation:**

thats the answer on edg :)

**Answer:**

4.33 or 13/3

**Step-by-step explanation:**

12x + 16 = 68 (subtract 16)

12x = 52 (divide by 12)

x = 4.33333333 (repeats) = 13/3

There are 60 bricks in a stack 20 feet high.

2x10=20

If you multiply the 2 by 10, you have to multiply 6 by 10.

6x10=60

So if there are 6 bricks in a 2 feet high stack, there are 60 bricks in a 20 feet high stack.

The tallest is 2 7/8

The shortest is 1 3/4

Difference = 2 7/8 - 1 3/4 = 1 1/8