Solve the equation by finding the common multiple. Will give brainiest two thirds minus four sevenths plus fifteen-twenty ones equals blank

seventeen twenty ones
thirteen twenty ones
twenty-one seventeenths
fifteen-twenty ones

At the many chips cookie company they are serious about the number of chocolate chips in their cookies they claim that each cookie hasn't c chips. if their claim is true there will be 200 chips in 10 cookies

Identify the converse of the following conditional: if a point is in the first quadrant, then its coordinates are positive. if the coordinates of a point are not positive, then the point is not in the first quadrant. if the coordinates of a point are positive, then the point is in the first quadrant. if a point is in the first quadrant, then its coordinates are positive. if a point is not in the first quadrant, then the coordinates of the point are not positive.

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much