<span>A) The constant is 7.5.  FALSE.  7.5 is a coefficient, not a constant.
</span><span>B) The coefficients are 7.5 and -9.  FALSE.  The coefficients are 7.5, -1/9 and 2.  50, being a constant, could be regarded as a coefficient in this case.
</span><span>C) The variables are x and y.  FALSE.  There are three variables:  x, y and z.
</span><span>D) The like terms are 7.5y and 2y.  TRUE.  The variable (y) is the same in each term.</span><span>
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Answer:
12 years younger.
Step-by-step explanation:
Let Jan's age be J and Karyn's age be K.

Jan's age 8 years ago is 2/5 of Karyn's age 4 yeaRs from now. 

=> 
=> 4K = 48 X 3
=> K= 36.
=> J= 24.
So Jan is 12 years younger.
 
        
             
        
        
        
Answer:
V=314.15
Step-by-step explanation:
V=1/3pi*r^2*h
V=1/3*pi*5^2*12
V=1/3pi*25*12
V=1/3pi*300
V=300/3pi
V=100pi
V=314.15
 
        
             
        
        
        
I think its 200%
Best Of Luck!!!!
:D
        
             
        
        
        
Answer:
A: venti has a better unit rate at .2275 cents per ounce 
B: to get the unit rate you divide the cost by the number of ounces. 
Step-by-step explanation:
tall = .2958 cents per ounce
grande = .2656 cents per ounce
venti = .2275 cents per ounce