Answer:
Step-by-step explanation:

cross multiply
57(QR)=926.9
QR=16.26...
round to nearest tenth
QR=16.3
Answer:
A
Step-by-step explanation:
16+3:19
11+8:19
19=19
Answer:
21
Step-by-step explanation:
-9=9
9+12=21
Answer:
a(n) = 

Step-by-step explanation:
The given expression is in the form of the explicit formula of a geometric sequence.
f(n) = 
Where 'a' = First term of the sequence
r = common ratio
Recursive formula of a geometric sequence is,
a(n) = 
a(n) = 
Where, 
So the recursive formula will be a(n) = 
Answer:
y = 0.5x - 5.5
Step-by-step explanation:
slope = 0.5, so this is the x coefficient.
y intercept = -2 - (7 x 0.5) = -5.5