Answer:
Step-by-step explanation:
The average rate is just the slope of the function between t = 0 and t = 10, so we must calculate change in w / change in t. w(10) = 130. w(0) = 100. So, the slope = (130-100)/(10-0) = 30/10 = 3 gallons per minute.
Answer:
see explanation
Step-by-step explanation:
Not sure quite what you are asking, but
Using the trigonometric identity
cos² x = 1 - sin²x, then
cos²x - sin²x
= 1 - sin²x - sin²x
= 1 - 2sin²x
Thus
cos²30° - sin²30° = 1 - 2sin²30°
notes:
c= Colin
s=Sara
g=Gordon
c=g+36 (1)
c : g
5 : 1
c/g=5
c=g*5 (2)
=> from statement (1) => g*5=g+36
5g-g=36
4g=36
g=36/4=9 g=9 sweets
=> from statement (2)=>c=5*9=45 c=45 sweets
s : g
2 : 1
=>s/g=2/1
=> s=2g
s=2*9 s=18 sweets
sum=c+s+g
sum=45+18+9=72 sweets
the first choice would be the answer
