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slava [35]
3 years ago
13

you practice the piano for 30 min. each day. Write and solve an equation to find the total time t you spend practicing the piano

in a week.
Mathematics
2 answers:
Tom [10]3 years ago
7 0
Lets get all the information we need first.
A week has 7 days, you practice 30 min each day, so in a week you will practice a total time t of 30 min for 7 times, that is:
t = 7day(30 min/day)
t = 210 min
So in a week you will practice a total of 210 minutes.
hoa [83]3 years ago
7 0
There are 7 days a week, and you spend 30 minutes each day practicing
T = Time spend studying
30 * 7 = T

T = 210 minutes studying!
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we know that for any general equation of the parabola of the type y=ax^{2} +b x+c the vertex of the parabola is given by (h,k)

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so focus is (-2,\frac{1}{4} )

now the directrix of the parabola is y=\frac{-1}{4}.




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