OpenStudy (anonymous):

One more question, anyone know how to do this? Simplify: 1.8(a + b) + 2.1(1 + a)

OpenStudy (anonymous):

first distribute the numbers and then combine like terms

OpenStudy (anonymous):

1.8a+1.8b+2.1+2.1a 3.9a+1.8b+2.1<--- Answer