In a classroom of 28 students: 19 of the students have brown eyes 13 of the students wear glasses 7 of the students do not have
2 answers:
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Answer:
The rate of current is 2.5 mph.
Step-by-step explanation:
The speed in the water when current is absent is 9 mph.
If the speed of the current is v mph then the upstream speed is (9 - v) mph and the downstream speed is (9 + v) mph.
Now, it takes 5 hours longer to travel 74 miles upstream than down stream, then we can write the equation as
⇒
⇒ 148v = 405 - 5v²
⇒ 5v² + 148v - 405 = 0
Applying Sridhar Acharya's formula we can write
(Neglecting the negative root)
⇒ mph (Rounded to the nearest 10th) (Answer)
Answer:
Step-by-step explanation:
we are given opposite and adjacent
we want to figure out x°
remember that,
where our opp is 5 and adj is 12.5
let be x°
so
by using calculator
hence,
our answer is a