We can use the general term of the arithmetic series. Look:
Where:
: first term, 15.
: last term, 87.
n: number of terms (what we looking for);
r: reason, which is equal to the difference between two terms, that is, 3.
Let's go to the calculations.
There are 25 terms.
the soultion in 20
Step-by-step explanation:
first get the 34 hour of dogeball and get the 14 hour of basketball subtract 34 - 14 first 4 - 4 = 0 then 30 - 10 = 20
Seven Hundred Twenty is the correct answer.
Answer:
the boat travel one way = 2 x 14.16 = 28.32 miles
Step-by-step explanation:
the return trip only takes 1.7 miles (?) ... is it 1.7 hours (?)
the boat travels 2.5 miles (per hour ?) faster downstream
I calculate it on the assumption of my guess stated above ...
X: represent the boat speed / hour
distance one way = 2X
and Distance also = 1.7 * (x + 2.5 ) on return
2x = 1.7 x + 1.7 * 2.5 = 1.7x + 4.25
0.3 x = 4.25
x = 14.16
the boat travel one way = 2 x 14.16 = 28.32 miles
Step-by-step explanation:
nine point five four eight
