For this case, we have the following equation of the second degree:

If we divide between 2 on both sides of the equation, we will have:

Where:

The solutions will come from:

Substituting:

So, we have:

Answer:

Option A
Option E
Answer:
16 : 23
Step-by-step explanation:
23 is a prime number, so it can't be reduced
Speed is expressed as the ratio of distance/time = d/t
in Alex's case, speed = (3.8 miles / 18 minutes)
. . . or simply
3.8/18
Answer:
x ∈ (-oo ; - 1) ∪ (+ 2 ; +oo)
Step-by-step explanation:

x ∈ (+ 2 ; +oo)

x ∈ (-oo ; - 1)
x ∈ (-oo ; - 1) ∪ (+ 2 ; +oo)
Answer:
true
Step-by-step explanation:
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