Answer:start with an=a1+(n-1)d
a5=a1+4d=22
a15=a1+14d=62
Therefore, subtracting
-10d=-40
d=4
a5=22=a1+16
a1=6
6,10,14,18,22,a10 is 42, a15 is 62.
an=6+(n-1)*4
Step-by-step explanation:
Answer:
32
Step-by-step explanation:
an = a1 + (n - 1)d
a5 = 32=a1 + 4d
a10=57 = a1 + 9d
57=a + 9d
32=a + 4d
25=5d
A) d=5
32=a1 + 4*5
B) a1=12
57=a1 + 9*5
57=a1+45
B) 12=a1
an = a1 + (n - 1)d
an = 12 + 5(n - 1)
an = 12 + 5n - 5
C) an = 5n +7
D) a22 = 5*22 +7=117
