Question

What is 2|u|-|v|, if u= -9 and v=-2?

A.-18
B. -20
C. 16
D. 20

Answer 1

`\text{Put the values of u = -9 and v = -2 to the expression }2|u|-|v|:\\\\2|-9|-|-2|=2(9)-2=18-2=16\\\\Answer:\ \boxed{C.\ 16}\\\\|a|=a\ if\ a\geq0\\|a|=-a\ if\ a<0\\\\Examples:\\\\for\ a\geq0\\|3|=3;\ |6|=6;\ |0|=0\\\\for\ a<0\\|-3|=-(-3)=3;\ |-6|=-(-6)=6;\ |-9|=9`