How to find g(x) from parent function f(x)=2x-1 when the vertical translation is 4 units down

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¯¯¯¯¯¯¯¯)?

Whit h equation best represents this situation the number 98 increased by an unknown number equal to 120

The candy store is having a 30% off sale. emma is going to buy $7.50 worth of candy. how much will she pay after the discount