If angle x and y are complementary angles, which of the following must be true?

a) tan x = cos y
b) sin x = tan y
c) cos x = cos y
d) cos x = sin y

Part a what is the area of triangle i? show your calculation. part b triangles i and ii are congruent (of the same size and shape). what is the total area of triangles i and ii? show your calculation. part c what is the area of rectangle i? show your calculation. part d what is the area of rectangle ii? show your calculation. part e rectangles i and iii have the same size and shape. what is the total area of rectangles i and iii? show your calculation. part f what is the total area of all the rectangles? show your calculation. part g what areas do you need to know to find the surface area of the prism? part h what is the surface area of the prism? show your calculation. part i read this statement: “if you multiply the area of one rectangle in the figure by 3, you’ll get the total area of the rectangles.” is this statement true or false? why? part j read this statement: “if you multiply the area of one triangle in the figure by 2, you’ll get the total area of the triangles.” is this statement true or false? why?

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

E. which of the following is not a possible probability? a. 25/100 b. 1.25 c. 1 d. 0