Answer:
see explanation
Step-by-step explanation:
the n th term of an arithmetic sequence is
= 
+ (n - 1)d
given = 3 and 
= 10, then
= 3 + d = 10 ⇒ d = 10 - 3 = 7
= 3 + 7(n - 1) = 3 + 7n - 7 = 7n - 4
the sum to n terms of an arithmetic sequence is
= 
[2 + (n - 1)d ]
= [(2 × 3) + 7(n - 1) ]
= (6 + 7n - 7 )
= (7n - 1)
= 
n² - 
n
Answer: Its the 4th choice
Step-by-step explanation:
-12 + 8 = -4
Answer:
Obtuse
Step-by-step explanation:
Has one obtuse angle, i hope this helps you
5 - 6 pm
if the temperature drops 3 degrees per hour. so how many hours would it take to go from 98.6 to 86.3
98.6-86.3=12.3
3 goes into 12 4 times.
10 pm - 4 hours is 6pm.
if you figure in the .3
you come to approximately 5pm
Answer:
8/5
Step-by-step explanation:
m=(y2-y1)/(x2-x1)
m=(-4-68)/(21-66)
m=-72/-45
simplify
m=8/5
