Answer:
Step-by-step explanation:
Each term of this Geometric Series (3, −6, 12, −24, ...) can also be found through this explicit formula: Because the
term is found by the product of its common ratio "q", times its predecessor n-1. Where n, refers to the order of the term.
So let's test it, suppose we want to find the 4th term. We know the common ratio and the first term. Then we can write f(n) as:
f(4)=f(3)*-2⇒-24=12*-2⇒-24=-24
The explicit formula is ok.
She has $12,488 in savings
Step-by-step explanation:
Ariana plans to use $260 less than three-fourths of savings to buy a car.
If the purchase price of the car is 9,340, we need to find how much
she has in savings
To find the savings
∵ She has $x in savings
∵ She plans to use $260 less than three-fourths of savings
- Three-fourths means and less than means subtract
∴ She plans to use x - 26
∵ The purchase price of the car is 9,340
- Equate the expression of x by 9,340
∴ x - 26 = 9,340
Now let us solve the equation
∵ x - 26 = 9,340
- Add 26 to both sides
∴ x = 9,366
- Divide both sides by
∴ x = $12,488
She has $12,488 in savings
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