What is the value of -9x2 to the power of 3

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

Ascatterplot is produced to compare the size of a school building to the number of students at that school who play an instrument. there are 12 data points, each representing a different school. the points are widely dispersed on the scatterplot without a pattern of grouping. which statement could be true

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income