Answer:
it is 9 cm because 9 x 8 is 72
Step-by-step explanation:
9 cm
13x+16
3x+7+8x+2x+4+5
13x+7+4+5
482.84 cm
Answer: 1) 25b 2) ac 3)ba
1) Since b is unknown, your answer will be 25b
2) Since both variables, a and c, are unknown, your answer will be ac
3) Since both are unknown here, it will be ba!
