Please answer correctly

Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

Which best explains why this triangle is or is not a right triangle ?

Shape a is congruent to shape , as shown by a reflection across the y-axis and then a translation down units. shape b is congruent to shape , as shown by a reflection across the y-axis and then a translation down units.