Answer:
<u><em>y=7  </em></u><u>number of hours at grocery store</u>
<u><em>x=18 </em></u><u>number of hours at baby- sitting</u>
Step-by-step explanation:
According to the information provided.
x is number of hours at baby- sitting
y is number of hours at grocery store
total number of hours worked
<em>1) </em><em>x+y =25</em>
total earn in a week
<em>2) </em><em>x*$6 + y* $9 = $171</em>
<em />
<em>from equation 1</em>
x+y=25
x= 25-y
<em>we place the above derived equation in equation 2 </em>
x*$6 + y* $9 = $171
(25-y)*$6 + y* $9 = $171
(25*6) -6y +9y =171
150+3y=171
3y=171-150
3y=21
<u><em>y=7  </em></u><u>number of hours at grocery store</u>
x= 25-y 
x= 25-7
<u><em>x=18 </em></u><u>number of hours at baby- sitting</u>
 
        
             
        
        
        
Answer:
Growth when: b>1.
Decay when: 0<b<1.
Step-by-step explanation:
Any function in the form  , where a > 0, b > 0 and b not equal to
 , where a > 0, b > 0 and b not equal to  is called an exponential function with base b.
 is called an exponential function with base b.
If 0 < b < 1 this is an example of an exponential decay.
The general shape of an exponential with b > 1 is an example of exponential growth.
Hence,
An exponential function is expressed in the form  ,   The relation represents a growth when  b >1 and a decay when 0<b<1.
,   The relation represents a growth when  b >1 and a decay when 0<b<1.
 
        
             
        
        
        
The correct point of the graph would be B. (2,-5)
        
                    
             
        
        
        
Answer:
- cos (x) cos (2x) - 2sin(x) sin(2x)
Solution: 
(See the solution in the photo)