Uber made a formal €13 billion offer to acquire Delivery Hero. The move appeared in a filing with investors. The goal is to push Uber’s services beyond just ride-hailing. Delivery Hero agreed and described the plan as part of its own push to diversify. Bosses mentioned plans to merge food delivery with ride-hailing, but provided few updates on savings. Analysts cautioned the size of the deal could create problems. They pointed to tough integration and doubts over whether the valuation is fair.