x°,y° and z° are three angles lying on a straight line. (a) If y°=45° and z°=86°,find the value of x. (b) If x°=2y° and z°=3y°,find the value of y​

In which book word demography is used for first time

How much do the tanakas spend on health insurance premiums each year

What is a negative influence on community health? a: national health debt b: citizens who drive unsafely c: unreliable public transportation d: stores that sell tobacco to minors