Khanacademy Units: Sequences What does f(3) equal?

Mathematics

1 answer:

Oduvanchick [21]3 years ago

5 0

Answer:

f(3) = 100

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Functions
Function Notation

Step-by-step explanation:

Step 1: Define

Identify

$\displaystyle \left \{ {{f(1) = 4} \atop {{f(2) = 25} \atop {f(n) = f(n - 2) \cdot f(n - 1)}} \right.$

Step 2: Evaluate

Substitute in n [Function f(n)]: f(3) = f(3 - 2) · f(3 - 1)
Simplify: f(3) = f(1) · f(2)
Substitute in function values: f(3) = 4 · 25
Multiply: f(3) = 100

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You and your friends are splitting the cost of some peaches at a roadside stand. The expression 3.5x/5 represents how much each

attashe74 [19]

Answer:

You have 4 friends

Step-by-step explanation:

Let's break our expression apart

- 3.5 is the cost of one peach

- $x$ is the number of peaches

So, the total cost of $x$ peaches is $3.5x$ .

Now, the expression $\frac{3.5x}{5}$ means that you are dividing the total cost of the peaches among you and your friends. The thing you are dividing by; in other words, the denominator of your fraction, 5, indicates how much you and your friends will pay for the total number of peaches.