Answer:
a=5.94
Step-by-step explanation:
step 1
Multiply out the matrix into a simultaneous equation to obtain
37a+22b+59c=500.25-------------------------i
27a+31b+44c=428-------------------------------ii
30a+31b+57c=488.20--------------------------iii
step 2
Solve simultaneously or by calculator to obtain
a=5.94, b=4.01 and c=3.26, approximately.
