Answer:

Step-by-step explanation:
<u>Step 1: Make an expression</u>
<u />
<u>Step 2: Cross Multiply</u>
<u />


<u>Step 3: Divide both sides by 4</u>
<u />

Answer: 
Answer:
Yes
Step-by-step explanation:
9/21 SIMPLIFIED= 3/7
6/14 SIMPLIFIED= 3/7
Answer:
Step-by-step explanation:
<u>80 g rock displaces water:</u>
- 75 ml - 30 ml = 45 ml = 45 cm³
<u>Density = mass / volume:</u>
- d = 80 g / 45 cm³
- d = 1.78 g/cm³ (rounded)