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Evaluate the expression for $u = -0.4$ and $v = -9$ . $\newline$ Write your answer as a decimal or whole number. $\newline$ $-2uv =$ _____

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Evaluate variable expressions involving rational numbers

Full solution

Q. Evaluate the expression for

u = -0.4

and

v = -9

.

\newline

Write your answer as a decimal or whole number.

\newline

-2uv =

_____

Identify Expression: Identify the expression to be evaluated. $\newline$ The expression given is $-2uv$ . We need to substitute $u = -0.4$ and $v = -9$ into this expression.
Substitute Values: Substitute the values of $u$ and $v$ into the expression. $\newline$ Substitute $u = -0.4$ and $v = -9$ into $-2uv$ to get $-2 \times (-0.4) \times (-9)$ .
Perform Multiplication: Perform the multiplication. $\newline$ First, multiply $-2$ by $-0.4$ to get $0.8$ . Then, multiply $0.8$ by $-9$ . $\newline$ Calculation: $0.8 \times -9 = -7.2$
Check Result: Check the result. $\newline$ The multiplication is correct, and the result is a decimal number as requested.

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