Pueden ayudar a mi amiga XxyourgirlchantellxX ? Ella lo publicó más de una vez y nadie la ayudó y no puedo porque tengo tarea, así que alguien puede ayudarla? (es matemática muy simple)

Which of the following vectors are orthogonal to (2,1)? check all that apply

Consider the enlargement of the pentagon. what is the value of x, rounded to the nearest tenth? 2.1 centimeters 3.3 centimeters 7.0 centimeters 15.0 centimeters

Abby is collecting rainfall data. she finds that one value of the data set is a high-value outlier. which statement must be true? abby will use a different formula for calculating the standard deviation. the outlier will increase the standard deviation of the data set. the spread of the graph of the data will not change. abby will not use the mean when calculating the standard deviation.