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Evaluate the expression for $f = -5$ . $\newline$ $-4f =$ _____

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Evaluate variable expressions involving integers

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Q. Evaluate the expression for

f = -5

.

\newline

-4f =

_____

Identify Expression: Identify the expression to evaluate. $\newline$ We need to evaluate $–4f$ with the given value of $f$ , which is $–5$ .
Substitute Value: Substitute the value of $f$ into the expression. $\newline$ Replace $f$ with $–5$ in the expression $–4f$ . $\newline$ Expression: $–4(–5)$
Evaluate Expression: Evaluate the expression. $\newline$ Multiplying $-4$ by $-5$ gives us $20$ because the product of two negative numbers is positive. $\newline$ $-4(-5) = 20$

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