6.1k views
5 votes
I'm so lost please help me

I'm so lost please help me-example-1

1 Answer

1 vote

Answer:

51

Explanation:

The expression to be evaluated is x² - 3yz, where x = 9, y = -5, and z = -2.

To evaluate this expression, we substitute the given values of x, y, and z into the expression and perform the necessary calculations.

Substituting the values into our given expression:

⇒ x² - 3yz

⇒ (9)² - 3(-5)(-2)

Now calculating:

⇒ (9)² - 3(-5)(-2)

⇒ 81 - 30

∴ 51

Therefore, when x = 9, y = -5, and z = -2, the expression x² - 3yz evaluates to 51.


\hrulefill

Additional Terminology/Concepts:

Expression: A mathematical statement that contains variables, numbers, and operations but doesn't have an equal sign.

Evaluate: To find the numerical value of an expression for specific given values of the variables.

Substitution: The process of replacing variables in an expression with their given values.

Calculation: The act of performing mathematical operations to determine a result.

User Neits
by
8.5k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories