Find the indicated value of the function. Use your calculator to approximate irrational numbers. Round irrational
numbers to the nearest thousandth.
-$\text { Find } r ( 18 ) \text { if } r ( x ) = \frac { x } { 3 } + \sqrt { 2 x } - 2$
A)14
B)-2
C)10
D)2

Question

Quizplus · Accepted Answer

To find $r(18)$, substitute $x = 18$ into the function $r(x) = \frac{x}{3} + \sqrt{2x} - 2$. This gives $r(18) = \frac{18}{3} + \sqrt{2 \cdot 18} - 2 = 6 + \sqrt{36} - 2 = 6 + 6 - 2 = 10$.

Find the Indicated Value of the Function Find r(18) if r(x)=x3+2x−2\text { Find } r ( 18 ) \text { if } r ( x ) = \frac { x } { 3 } + \sqrt { 2 x } - 2 Find r(18) if r(x)=3x​+2x​−2

Find the Indicated Value of the Function $\text { Find } r ( 18 ) \text { if } r ( x ) = \frac { x } { 3 } + \sqrt { 2 x } - 2$