Step-by-step explanation:
<u>Step 1: Add 8 to both sides</u>


<u>Step 2: Multiply both sides by -4</u>


Answer: 
Answer:
Acute angle
Step-by-step explanation:
Answer: 600
<u>Step-by-step explanation:</u>
20 x 30
= 2 x 10 x 3 x 10
= 2 x 3 x 10 x 10
= 6 x 100
= 600