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Mathematics 17 Online
OpenStudy (freemap):

Please Help Me

OpenStudy (hoxton):

ye?

OpenStudy (freemap):

The height H(m) of a kite, in meters, is a function of the number of minutes m since Aubrey was told it was time to go home, as shown in the table. The function is a linear function. What was the height of the kite when Aubrey was told it was time to go home? Use a table to interpret key features of a linear function. [1] m

OpenStudy (freemap):

m=

OpenStudy (anonymous):

im not trying to be rude, but after you find your answer would sombody anybody mind helping me with an inequality??? i really need help too... please

OpenStudy (freemap):

Oh, its okay i can't help because I not that good at math

OpenStudy (michele_laino):

we have to write the equation of your function

OpenStudy (freemap):

how do we write this?

OpenStudy (michele_laino):

namely, using your table, we have to determine the values of the coefficients \(a,b\) of this function: \(H(t)=at+b\) where \(t\) is time in minutes

OpenStudy (freemap):

what would be at?

OpenStudy (michele_laino):

from your table, I see that at \(t=0\) \(H=300\), so I can write this: \(300=a \cdot 0+b\) what is \(b\)?

OpenStudy (freemap):

I'm not trying to sound you know, but would b somehow be the slope

OpenStudy (michele_laino):

\(a \cdot 0=0\) so \(b=300\)

OpenStudy (freemap):

so 300 + 0 = 300

OpenStudy (michele_laino):

right! Now I update my function, so I can write this: \(H(t)=at+300\) therefore, we have to determine the coefficient \(a\)

OpenStudy (freemap):

H(t)= at +300 coefficient a, i don't know because 0 is dismissed

OpenStudy (michele_laino):

for example at \(t=10\) we have (from your table) \(H=150\), so i can write this: \(150=a \cdot 10+300\) please solve for \(a\)

OpenStudy (freemap):

150=10a + 300 do I then subtract 300 - 150?

OpenStudy (michele_laino):

more precisely you have to compute this: \(150-300\)

OpenStudy (michele_laino):

what is 150-300=...?

OpenStudy (freemap):

so -150 divided by 10 would be -15

OpenStudy (michele_laino):

correct! \(a=-15\) therefore our function is: \(H(t)=-15t+300\)

OpenStudy (michele_laino):

now, when Aubrey has to go home?

OpenStudy (freemap):

Having extreme problems with computer and I'm on my phone which is hard to work onso do we divid now

OpenStudy (michele_laino):

we have to replace \(t\) with the time at which Aubrey went home. what is theat time? I don't know

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