Question

When x = 6, which expression has the least value?a.2x + 10b.3x + 3c.4x-2d.5x - 10

Answer 1

d. 5x - 10

Explanation

Substituting x = 6 into the first expression:

`\begin{gathered} 2x+10= \\ =2\cdot6+10= \\ =12+10= \\ =22 \end{gathered}`

Substituting x = 6 into the second expression:

`\begin{gathered} 3x+3= \\ =3\cdot6+3= \\ =18+3= \\ =21 \end{gathered}`

Substituting x = 6 into the third expression:

`\begin{gathered} 4x-2= \\ =4\cdot6-2= \\ =24-2= \\ =22 \end{gathered}`

Substituting x = 6 into the fourth expression:

`\begin{gathered} 5x-10= \\ =5\cdot6-10= \\ =30-10= \\ =20 \end{gathered}`