Answer:
Option b is correct 175
Step-by-step explanation:
n = 7
k = 6
3k -2 ------1
put k = 6 in above eq. for finding first term
a1 = 3(6) - 2 = 18 - 2 = 16
put k = 7 in above eq. for finding first term
a2 = 3(7) - 2 = 21 - 2 = 19
a3 = 3 (8) - 2 = 24 - 2 = 22
16, 19 , 22, ... //Arithmetic series formation
a1 = 16 , a2 = 19
d = a2 - a1 = 19 - 16 = 3 //Difference of first two terms
Using sum forumula for arithmetic series
sum = 
= 
= 
=
=
= 7 * 25
= 175
Answer:
cars rate of speed: 45 mph
Part B: d=45t
Step-by-step explanation: d=rt formula
r=45
585/13=45
Answer:
Step-by-step explanation:
350 degree hope dis help
Answer: $49.75
Step-by-step explanation:
$53.50 is with the added 7%.
we want to find what the price is without the 7%
take that $53.50 is 100%
1% - 53.50/100 = 0.535
7% - 0.535 x 7 = 3.745
$53.50 - 3.75 = $49.75
Amplitude is 5
period is 360/20 = 18 degree
Im lazy to do graph