Answer:
65
Step-by-step explanation:
the sequence is decreasing by 8
For this case we have that the complete question is:
There were 20 drinks in a cooler. Joey drank 15% of the drinks. Sandra drank 1/5 of the drinks. Hannah drank 1/4 of the drinks. Tammy drank 30% of the drinks. How many drinks are left in the cooler? a 0 b 2 c 5 d 9
We propose a rule of three:
20 ---------> 100%
x ------------> 15%
Where the variable "x" represents the amount of drinks equivalent to 15%.

So, Joey drank 3 drinks.
On the other hand, we have that Sandra drank
of the drinks:

Thus, Sandra drank 4 drinks.
In addition, Hannah drank
of the drinks:

So Hannah drank 5 drinks.
Finally, Tammy drank 30% of the drinks:
20 ---------> 100%
y ------------> 30%
Where the variable "y" represents the amount of drinks equivalent to 30%.

So Tammy drank 6 drinks.
Adding up we have:

So: 
Thus, 2 drinks remain in the refrigerator.
Answer:
Option B
Answer:
vertex is (-4,-6)
Step-by-step explanation:
put x+4=0
x=-4
when x=-4
f(x)=-6
3.2-3x+7
6-3x+7
-7 -7
-1= -3x divide both sides by -3
x=0.3
Answer:
B. 4x ≤ 320
Step-by-step explanation:
Not sure how to explain my thinking. However, 4x must be smaller than 320 because she cannot spend more than that.