Step-by-step explanation:
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X^3-2x is an algebraic expression. Note that there is NO "=" sign here.
x^4 + 4x^2 + 4 = 0 is an algebraic equation. Note the presence of an "=" sign.
Answer:
1287.48 km
Step-by-step explanation:
80 miles = 128.748 km
Putting in 'x' for distance
x = 80*10
x = 800 miles
or
x = 1287.48 km
True because it has 4 equal sides and 4 equal interior angles each measuring 90 degrees