Jason's age is 1/2 of his brother's age. his brother's age can be represented by the expression 12a - 9. write an expression that can be used to represent the sum of their ages. a) 12a - 5.5 b) 18a - 13.5 c) 18a + 21 d) (12a-9)/2

Quadrilateral ghjk has vertices g(2, 3), h(8, 2), j(6, 8), and k(3, 6). it is transformed according to the rule t(–4, –5). what are the coordinates of g”? (–7, 3) (–2, 2) (–1, –7) (2, –2)

Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?

Three baby penguins and their father were sitting on an iceberg 0.50.50, point, 5 meters above the surface of the water. the father dove down 4.74.74, point, 7 meters from the iceberg into the water to catch dinner for his kids. what is the father penguin's position relative to the surface of the water?