Answer:
Step-by-step explanation:
Given the expression
Using law of indices:
Also:13+8=21
Therefore:
Answer:
20
Step-by-step explanation:
hope this was right and helpful
Answer:
bob would be 46
Step-by-step explanation:
take 67 subtract 4 to get 63 and divide it by 3 to get 3 groups of 21
add 21 and 21 to get 42+4=46