Answer:
29
Step-by-step explanation:
-2x+4+3y-5x-2y
Combine like terms
-7x+1y+4
evaluate
-7(-3) 1(4) 4
Solve
21+4+4
29
15-27b+11=-244
26-27b=-244
-27b=-270
b=10
Answer: 75
h23 means we look at the 2nd row and 3rd column of matrix H. The value found here is 75
