keke6361
02.09.2019 •
Mathematics
Explain each part !
the cost c, in dollars , of building a concrete sidewalk varies directly with its lentgh , s, in meters
a.. find an equation relating c and s if 200m sidewalk costs $4500
b) what does the constant variation represent ?
c) use the equation to determine the cost of a 700m sidewalk
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Ответ:
To find the equation, we must find out how much a 1m sidewalk cost: 4500/200= 22.5 $/m
so the equation is s*22.5=C
B)The constant variation represent that every 1m is equal to $22.5
C) 700*22.5= $15,750
Ответ:
15
Step-by-step explanation: