Find an explicit rule for the nth term of the sequence. 4, -4, 4, -4,

Step-by-step explanation:

We see that the sequence goes from +4 to -4 to +4 again and so on.

So, the number value remains the same, but the sign changes.

One way to achieve the prediction is to use the sequence position to determine if the sign will be positive or not.

We notice the negative values are in position 2, 4, 6 and so on. So, we could use (-1)^(n-1), that way for the first element, we'll get (-1)^0, which is equal to 1, so positive, for the second element we'll get (-1)^1, which is -1, so negative, and so on.

The rule would then be:

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500

imma say 16%. sorry if its wrong. i'm doing the same stuff right now

step-by-step explanation: