If <em>x</em> is the number of years from now, that means the <em>current</em> population is when x=0
Therefore, we plug this into the equation:
f(x) = 1200(0.8)^0 = 1200 elk at the park currently
Answer:
80 miles per hour
Step-by-step explanation:
<em><u>Eastbound</u></em>
r = r - 12
t = 5 hours
d = d_e
<em><u>Westbound</u></em>
r = r
t = 5 hours
d_w = 850 - d
The two distances add up to 850 miles
d_w + d_e = 850 miles
(r * t)_w + ( (r -12)*5 ) = 850 miles
r*5 + (r - 12) * 5 = 850 Pull out 5 as a common factor
5 * ( r + r - 12) = 850 Divide by 5
(r + r - 12) * 5/5 = 850/5 Do the cancellation
2r - 12 = 170 Add 12 to both sides
2r - 12 + 12 = 172 + 12
2r = 184 Divide by 2
r = 92
r = the westbound train = 92 mph
r - 12 = The eastbound train = 80 mph
18 feet
72/4 = 18
This needs to be 20 characters sorry
To simplify a fraction, you divide the top and the bottom by their
common factor, if they have any.
So the first thing we have to do is figure out whether 35 and 63
have any common factors.
The factors of 35 are 1, 5, 7, and 35 .
The factors of 63 are 1, 3, 7, 9, 21, and 63 .
We don't care about ' 1 '.
'1' is a factor of EVERY number, and it doesn't help anyway.
We could divide things by '1' all day long and nothing would change.
The only common factor besides ' 1 ' is 7 .
So to simplify the fraction, we divide top and bottom by 7 .
35/7 = 5
63/7 = 9
35 / 63 = 5 / 9 .
Answer:
speed is 35 I think it is answer
