Find an explicit formula for the arithmetic sequence 12, 5, -2, -9,...12,5,−2,−9,...12, comma, 5, comma, minus, 2, comma, minus,
Andrew [12]
Answer:
A(n) = 19 - 7n
Step-by-step explanation:
12, 5, -2, -9,...
First term, a = 12
Common difference, d = a2 - a1
a2 = 5
a1 = 12
Common difference, d = a2 - a1
= 5 - 12
= -7
d = -7
A(n) = a + (n - 1)d
A(n) = 12 + (n - 1) -7
= 12 + (-7n + 7)
= 12 - 7n + 7
= 12 + 7 - 7n
= 19 - 7n
A(n) = 19 - 7n
9514 1404 393
Answer:
$5
Step-by-step explanation:
If L represents Lisa's earnings, we have ...
$25 = 5L
Dividing both sides of this equation by 5 gives ...
$25/5 = (5L)/5
$5 = L
Lisa earned $5.
Answer: b
Step-by-step explanation: your welcome if its right
:)
Answer:
Driving to Chicago Driving Back
d=rt
400/8=r(8)/8
r=50 mph < r= 52 mph
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
Hopefully it helps you get it right!