I don't think you're stupid. ^^
Let's take the third term, 8. If n=3, then an should be 8.
The first answer gives 15+2.5*3=22.5.
The second answer gives 15.5+2.5=23.
The third answer gives 15-2.5*3=7.5.
The fourth answer gives 15.5-2.5*3=8.
Choice 4 is correct.
Let's try to actually find the equation on our own.
The equation for an arithmetic series is an=a0+dn where a0 is the term that comes before the first term.
The first term given is 13 and it decreases by 2.5 each time so n=-2.5 and the term that would be before 13 is 15.5.
Thus the equation is an=15.5-2.5n
146Answer:146 and your hot
Step-by-step explanation:
Answer:
193
Step-by-step explanation:
Answer:
65 feet
Step-by-step explanation:
That's what I think, I really don't know so don't count on it.
Answer:
1,398
Step-by-step explanation:
i think this is it cause this is very close. Have a nice day.
