Question

A mathematician simplifies the expression mentally. 6 (-2-4) What is the best estimate of the value of the expression? (2.) +6.6(25) A 6 B 8 C13 D 15.

Answer 1

Given:

`(6)/((-2-4))+6.6(2(1)/(8))`

Let's evaluate the expression and find the best estimate.

We have:

`\begin{gathered} (6)/((-2-4))+6.6(2(1)/(8)) \\ \\ =(6)/(-6)+6.6((17)/(8)) \\ \\ =-1+(112.2)/(8) \\ \\ =-1+14.03 \\ \\ =13.03\approx13 \end{gathered}`

Therefore, the best estimate of the value of the expression is 13.

ANSWER:

C. 13