To find the speed you must write S= d/t so for the first one we will chang 15 m to b so it is = 0.25h so s=3/0.25h = 12km/h an why secand is 45 m to h = 0.75h so S=d/t S =12/0.75 =16 km/h the to find the totel speed we should + the speed together so 12 + 16 = 28 km/h
1.) Distribute 4 to (3x) & (8):

,

2.) Rewrite the expression:

3.) Combine like terms:

4.) Rewrite the final expression:
Final Answer: <span>

Hope this helps!!
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Step-by-step explanation:
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Answer:
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Step-by-step explanation: