Answer:
540$
Step-by-step explanation:
9x9 = 81
9 + 9 + 9 + 9 = 36
36 x 15 =540
Answer: the answer is 100
Step-by-step explanation:
Because 25 times 4 equals 100 use a Calculator
Answer:

Step-by-step explanation:

Dividing first.

Multiplying and subtracting.

Division.

Answer:
B) 3.5cm
Step-by-step explanation:
1/80 = n/280
1 * 280 = n * 80
280 = 80n
3.5 = n or n = 3.5