D = r * t is the formula that will be used to find the distance traveled.
Serenity: d = 17 * 2
Serenity = 34 miles
Mystic: d = 20 * 2
Mystic = 40 miles
34 + 40 = 74 miles
They are 74 miles apart after 2 hours
Answer:
1680
Step-by-step explanation:
1680 is the answer
If we observe closely the given, we can note that the
terms given are perfect cubes. That is,
<span> x^3 is
cube of x and</span>
<span> 343 is
cube of 7</span>
Hence, the expression is the sum of two cubes. For the
sum of cubes, we follow the following rule for the factoring:
<span> a^3 + b^3 = (a +
b)(a^2 – ab + b^2)</span>
Applying the rule to the given, the factors would be:
<span> X^3 + 373 = (x +
7)(x^2 – 7x + 49)</span>
