Jill converted the equation of the line 15x-4y=-2 into slope-intercept form and found the slope and y-intercept of the line as follows. what was her mistake? she mixed up the slope and the y-intercept. she got the sign of the slope wrong. she got the sign of the y-intercept wrong. she found the reciprocals of the slope and the y-intercept.

What is the expression in factored form? -20x^2 - 12x a. 4x(5x+3) b. -4x(5x-3) c. -4(5x+3) d. -4x(5x+3)

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.

What is the domain of the step function f(x)=[2x]-1?