Find the lenght of r. PLZ HELP

Need santino bought a 3/4 pound bag of chocolate chips. he used 2/3 of the bag whule baking. how many pounds of chocolate chips did he use while baking?

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1

Iwill give ! if m∠a=59 and m∠3=81°, what is m∠b? m∠b= _[blank]_°