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:

$\frac{6}{(-2-4)}+6.6(2\frac{1}{8})$

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

We have:

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

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

ANSWER:

C. 13