The sale price of every item in a store is 85% of its usual price. a. The usual price of a backpack is $30, what is its sale price? The backpack now costs $
.

b. The usual price of a sweatshirt is $18, what is its sale price? The sweatshirt now costs $
.

c. The usual price of a soccer ball is $24.80, what is its sale price? The soccer ball now costs $
.

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.