Find the coordinate of the vertices of triangle ABC with A (1,2), B (3,3) and C (3.-1), after the triangle is reflected over the y-axis

Find the value of the cosine for angle a

The test scores of 32 students are listed below. construct a boxplot for the data set and include the values of the 5-number summary. 32 37 41 44 46 48 53 55 57 57 59 63 65 66 68 69 70 71 74 74 75 77 78 79 81 82 83 86 89 92 95 99

Are triangles the congruent? write the congruency statement. what is the congruency that proves they are congruent? what is the perimeter of ∆pqr?