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Sati [7]
3 years ago
7

3) gentry is training for a marathon. she increases the amount of time she runs by 5 mins. each day to build up her endurance. o

n the first day, she runs for 30 minutes. how many minutes does she run on day 5?
A) 35 mins
B)45 mins
C)50 mins
D)150 mins
Mathematics
1 answer:
nika2105 [10]3 years ago
3 0
Y=5x+30

X is the days

And so by plugging in x you get

y=5(5)+30
y=25+30
y=55

And so by day 5 she's running 55 minutes

But that's what I think
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Linear system word problem
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Good job, you got the equations! XD

I'll just help you solve

Multiply the 2nd row by 9
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</span></span></span>Subtract the 2nd row from the 1st row
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Substitute 5 into an equation
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