Evaluate the expression for r = –7.9 and s = –2. Write your answer as a decimal or whole number. rs − s = _____

Identify Expression: Identify the expression to be evaluated. The expression given is rs − s. We need to substitute r = –7.9 and s = –2 into this expression.Substitute Values: Substitute the values of r and s into the expression. Substitute r = –7.9 and s = –2 into the expression rs − s to get (–7.9)(–2) − (–2).Perform Multiplication: Perform the multiplication. Multiply –7.9 by –2. The product of two negative numbers is positive, so (–7.9)(–2) = 15.8.Simplify Subtraction: Simplify the subtraction. Now we have 15.8 − (–2). Subtracting a negative is the same as adding a positive, so 15.8 − (–2) = 15.8 + 2.Perform Addition: Perform the addition. Add 15.8 and 2 to get 17.8.

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Math Problems

Algebra 2

Evaluate variable expressions involving rational numbers

Full solution

Q. Evaluate the expression for

r = -7.9

and

s = -2

\newline

Write your answer as a decimal or whole number.

\newline

rs - s =

_____

Identify Expression: Identify the expression to be evaluated. $\newline$ The expression given is $rs - s$ . We need to substitute $r = -7.9$ and $s = -2$ into this expression.
Substitute Values: Substitute the values of $r$ and $s$ into the expression. $\newline$ Substitute $r = -7.9$ and $s = -2$ into the expression $rs - s$ to get $(-7.9)(-2) - (-2)$ .
Perform Multiplication: Perform the multiplication. $\newline$ Multiply $–7.9$ by $–2$ . The product of two negative numbers is positive, so $(–7.9)(–2) = 15.8$ .
Simplify Subtraction: Simplify the subtraction. $\newline$ Now we have $15.8 - (-2)$ . Subtracting a negative is the same as adding a positive, so $15.8 - (-2) = 15.8 + 2$ .
Perform Addition: Perform the addition. $\newline$ Add $15.8$ and $2$ to get $17.8$ .