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3 years ago

If f(x) = 7x^2 -4, find f(2)

Mathematics

2 answers:

pogonyaev3 years ago

7 0

Step-by-step explanation:

f(x)= 7x²-4

f(2)= 7(2)²-4

= 7(4)-4

=28-4

=24

liberstina [14]3 years ago

4 0

Answer:

f(2)= 7 x^2 -4

7 x 4= 28 - 4= 24

anwer: 24

Step-by-step explanation:

I hope this help you.

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I need help REALLY FAST what is the distance between the points (-1, -3 3/4) and (-1, 4 1/2) ?

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Answer:

8 1/4

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Coordinates (x, y)

Algebra II

Distance Formula: $\displaystyle d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

Step-by-step explanation:

Step 1: Define

Identify

Point (-1, -3.75)

Point (-1, 4.5)

Step 2: Find distance d

Simply plug in the 2 coordinates into the distance formula to find distance d

Substitute in points [Distance Formula]: $\displaystyle d = \sqrt{(-1--1)^2+(4.5--3.75)^2}$
[√Radical] (Parenthesis) Subtract: $\displaystyle d = \sqrt{(0)^2+(8.25)^2}$
[√Radical] Evaluate exponents: $\displaystyle d = \sqrt{0+68.0625}$
[√Radical] Add: $\displaystyle d = \sqrt{68.0625}$
[√Radical] Evaluate: $\displaystyle d = 8.25$