In Year 8 the ratio of girls to boys is 1 : 3 There are 300 students in Year 8.
(b) Work out the number of girls in Year 8.

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Statement reason 1. δabc is similar to δced. given 2. 3. definition of slope 4. slope of slope of definition of slope 5. slope of × slope of multiplying the slopes 6. slope of × slope of substitution property of equality 7. slope of × slope of simplifying the right side the table contains the proof of the relationship between the slopes of two perpendicular lines. what is the reason for statement 2? a. parallel line segments that meet a common perpendicular line are proportional in length. b. the lengths of vertical and horizontal sides in congruent triangles are in a common ratio. c. trigonometric identities determine the lengths of the legs in a right triangle. d. corresponding side lengths in similar triangles are proportional in length.