brigid ran a 26.2 mile race last sunday. her average speed during the race was 11.7 miles per hour. how long did it take brigid
1 answer:
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Answer:
(n + 4) *2 = 11 * 2
Step-by-step explanation:
(n + 4) *2 = 11 * 2
Divide both sides by 2
n + 4 = 11
Answer:
is prime
Step-by-step explanation:
<u>Prime Trinomials</u>
A given trinomial is prime if it cannot be factored. The general expression for a trinomial is
Another useful expression is
where x1 and x2 are the zeroes of the trinomial.
The zeroes can be computed by using the known formula
The trinomial has two zeroes if the root can be found as a real number, that is if d is positive or zero, where
Let's test the four options
Since d is positive, the trinomial can be factored and therefore is not prime
Since d is negative, the trinomial is prime
Since d is positive, the trinomial can be factored and therefore is not prime
Since d is positive, the trinomial can be factored and therefore is not prime