Answer: 
Step-by-step explanation: In some cases you must apply the exponent rule, simplify, or multiply them together to get your answer.
Answer: 28/r+4
Step-by-step explanation: Divide each term by r + 4 and simplify
Answer:
17% i think
Step-by-step explanation:
20−6√3
Step by step Explanation:
√12+4√25−√108−1/4 √192
2√3+4×5-√108-2√3
2√3+20-√108-2√3
20−6√3