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babymother [125]
4 years ago
13

??? Help 70= .70(-2-2z)

Mathematics
1 answer:
photoshop1234 [79]4 years ago
7 0
70=.70(-2-2z)
70=-1.4-1.4z
68.6=1.4z
Z=49
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Answer:400 miles per hour

Step-by-step explanation:

Let w = speed at which the plane travelled west

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Distance moved in 5 hrs heading west = 5*w = 5w

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Total distance, 3444= 5w + 4s

w = s + 39( 39 miles/hr faster)

5(s+39) + 4s = 3444

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