answer choices:
a- the number of millimeters per rotation that the screw height changes
b- the height of the screw head above the wood befire tanvir rotated the screw driver
c- the number of rotations it takes to change the screw head height by 1 millimeter
d- none of the above

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

Find the value of x that will make l ll m

How is working backward similar to solving an equation?