Respuesta :

byrdkellykellybyrd

Answer: a.) -10r,    b.) 8b-41,  c.) 24b-14c


Step-by-step explanation:

for (a) multiply 5 and -2 keep the variable r (b) combine 8-46-3 for (c) multiply 3 and 8 then -2 and 7 keep the variables.