Find the missing coefficient.

- __?__ y2 − [-5y − y(-7y − 9)] − [-y (15y + 4)] = 0

The number of revolutions of two pulleys is inversely proportional to their diameters. if a 24-inch diameter pulley making 400 revolutions per minute is belted to an 8-inch diameter pulley, find the number of revolutions per minute of the smaller pulley.

Write the slope-intercept form of the line that passes through the point (1, 0) and is parallel to x - y = 7. t

Idon’t understand! use slope intercept form to solve: through: (2,5) slope= undefined