**Answer:like terms: 5x + -9x = -4x 6 + -2x = -12 + -4x Solving 6 + -2x = -12 + -4x Solving for variable 'x'.**

**Step-by-step explanation:**

6 - 2x = 5x - 9x + 18 - 12 6 - 2x = -4x + 6 -2x = -4x 4x - 2x = 0 2x = 0 x = 0 / 2 x = 0.

**Answer:**

-14c

**Step-by-step explanation:**

I’m using the actual values 1F = -17C so just times that by 5.4

**Answer:**

5)i. 7/1

ii. -8/1

iii. 2/1

iv. 9/1

v.0/1

5)i.4

ii.-5

iii. -7

iv. 3

v. 5

**Step-by-step explanation:**

interger/1 = rational number (anyt that can be expressed as a fraction)

**Answer:**

(c).

**Step-by-step explanation:**

h(t) = - 16 t² + 80 t

Coordinates of the vertex are:

**<em>t</em>** = - = = **<em>2.5 sec. </em>**

**<em>h</em>** = - 16(2.5)² + 80(2.5) = - 100 + 200 = **<em>100 ft</em>**.