ThIs QuESTIon
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Answer:
420 miles
Step-by-step explanation:
4*105=420 miles
for 1 inch is 105
for 4 inches=105*4=420
Rate (or speed) = distance/time
V1 = 135/3 = 45 mi/h
V2 = 189/3.5 = 54mi/h
She worked as a carpenter for 12 hours and as a blacksmith for 18 hours.
Assuming you mean she earned $20 as a carpenter and $25 as a blacksmith per hour, with a total of 30 hours for $690,
let c represent carpenter hours and b for blacksmith hours.
20c + 25b = 690
c + b = 30
Subtract b from each side so that c = 30 - b
Plug this value into the first equation
20(30 - b) + 25b = 690
600 - 20b + 25b = 690
600 + 5b = 690
5b = 90
b = 18
To find c, plug this value of b into the other equation
c + 18 = 30
c = 12
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