What is the value of 0.1561 rounded to the nearest tenth

Aline that intersects one of two parallel lines intersects the other also always sometimes never

Write the component forms of vectors u and v, shown in the graph, and find v − 2u. u= (< -3, -2> , < -3, -1> , < -2, -2> , < -2, -1> ) v= (< -5, 1> , -4, 0> , < 0, -4> , < 1, -5> ) v-2u= (< 5, 3> , < 0, 4> , < 4, 0> , < 5, -3>

Ireally don't understand this, i'm really an idiot but i want to know how to figure this out. !