Airbnb Inc. on Monday said private equity firm Silver Lake and Sixth Street Partners will invest $1 billion in Airbnb through a combination of debt and equity securities. The cash infusion will "support Airbnb's ongoing work" to invest over the long term in its community of hosts in more than 220 countries and regions. Airbnb, which is private, is one of several gig economy companies coping with the coronavirus pandemic.