An = a1 * r^(n-1)
-405 = -5*3^(n-1)
3^(n-1) = 81
3^4 = 81 so n-1 = 3 and n = 4
Sn = S4 = -5 (1 - 3^4) / ( 1 - 3) = 400 / -2 = -200 Answer
Answer:
let's start with
6a<42
a<7
Next we simplify
a+4>7
a>7-4
a>3
Step-by-step explanation:
Answer
3<a<7
19 because 6 divided by 3 = 2 + 17 ?
There is no simplest form for a decimal. You can only simplify equations and fractions, not decimals. For example, could you simplify 1? I don't think you could. Well, it's the same concept for -3.75.
Hope that answered your question.
