Answer:

Step-by-step explanation:
see the attached figure to better understand the problem
Applying the law of cosines

substitute the given values


Answer:

Step-by-step explanation:
<u>Step 1: Distribute
</u>
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<u>Step 2: Combine like terms
</u>
<u />

<u>Step 3: Subtract 7 from both sides
</u>
<u />
<u>Step 4: Add 2a to both sides
</u>
<u />

<u>Step 5: Divide both sides by 4
</u>
<u />

Answer: 
3/4=15
let,
total mass is x
x=4×15/3
=20 kg
so, total mass = 20 kg
=2×20/5
=2×4
=8 kg
Hope this helps!
Answer:
B. 452.39
Step-by-step explanation:
Answer:
6
Step-by-step explanation:
So the greatest common factor 18 and 48 is 6.