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3 years ago

Evauluate the expression 6^2 + x -x^2 for x = 3

Mathematics

1 answer:

Bas_tet [7]3 years ago

8 0

Answer:

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Step-by-step explanation:

Step 1: Define

6² + x - x²

x = 3

Step 2: Evaluate

Substitute in x: 6² + 3 - 3²
Exponents: 36 + 3 - 9
Add: 39 - 9
Subtract: 30

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3 years ago

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vladimir1956 [14]

Answer:

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Step-by-step explanation:

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3 years ago

For the function f (x) = 3 (x + 7), find -1().

AlekseyPX

Given:

The function is $f(x)=3(x+7)^{\frac{1}{4}}$ .

To find:

The function $f^{-1}(x)$ .

Solution:

We have,

$f(x)=3(x+7)^{\frac{1}{4}}$

Substitute f(x)=y.

$y=3(x+7)^{\frac{1}{4}}$

Interchange x and y.

$x=3(y+7)^{\frac{1}{4}}$

Divide both sides by 3.

$\dfrac{x}{3}=(y+7)^{\frac{1}{4}}$

Taking power 4 on both sides.

$\left(\dfrac{x}{3}\right)^4=y+7$

Subtract 7 from both sides.

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Substitute $y=f^{-1}(x)$ .

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Therefore, the correct option is C.

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