How do you factor out the b value out of a regression equation WILL MARK BRAINLEST

The equation:
y=1.701sin(0.514x-1.858)+12.123

Abike shop sells you a bicycle for $63 and a helmet for $21. the total cost is 150% of what the shop spent originally. how much did the shop spend originally? how much profit did the bike shop earn by selling the bicycle and helmet to you ?

Julia is going for a walk through the neighborhood. what unit of measure is most appropriate to describe the distance she walks?

If a baby uses 15 diapers in 2 days how many diapers will the baby use in a year