Find a rational approximation, to the nearest tenth, for the radical expression. $2 \sqrt { 19 } - 5 \sqrt { 19 } + 8 \sqrt { 19 } - 3 \sqrt { 19 } - 9 \sqrt { 19 }$
A) -26.3
B) -29.2
C) -30.7
D) -28.8
E) -30.5

Question

Quizplus · Accepted Answer

Combining like terms, we get $ -3 \sqrt { 19 } $. Since $ \sqrt { 19 } \approx 4.36 $, we have $ -3 \sqrt { 19 } \approx -3(4.36) \approx -30.5 $.

Find a Rational Approximation, to the Nearest Tenth, for the Radical