Answer:
B
Step-by-step explanation:
6+6+10+10+15+15
Answer:
the difference is -46 degrees
Step-by-step explanation:
Answer:
chord is the answer hope this helped
Answer:
an = 115 + (n - 1) (-6)
a25 = - 29
Step-by-step explanation:
We use the definition for the nth term of an arithmetic sequence:
an = a1 + (n - 1) d
a5 = 91 = a1 + (5 - 1) d
91 = a1 + 4 d
a20 = 1 = a1 + (20 - 1) d = a1 + 19 d
1 = a1 + 19 d
now we subtract term by term one expression from the other
90 = 4 d - 19 d
90 = - 15 d
divide both sides by -15 to isolate d
d = 90 / (-15) = -6
Now we can calculate what a1 is using for example:
1 = a1 + 19 d
1 = a1 - 114
add 114 to both sides:
115 = a1
Then our general expression for the sequence is:
an = 115 + (n - 1) (-6)
We can now use it to calculate the value of a25:
a25 = 115 + (24) * (-6) = -29
To do this find the LCD which in this case, is 16. once you multiply all fractions to where the denominator is 16 you should have: 10/16, 12/16,8/16 and 9/16. Your will be 8/16, 9/16, 10/16, 12/16
