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asambeis [7]
3 years ago
14

homer is saving for a harmonica. he already has 15$ saved and intends to save 4$ each week. the equation for the amount of money

y he had saved is y = 4x + 15, where x is the number of weeks. wHat do the slope and y intercept represent?
Mathematics
1 answer:
ZanzabumX [31]3 years ago
8 0
Well the slope, which is 4, represents the four dollars he gets each week. The y intercept, 15, represents the 15 dollars that Homer had previously/
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\because \: time \times speed  = distance \\  \therefore \: 4(t + 3) \times 10(t + 3) = 810 \\ \therefore \: 4(t + 3)^{2} = 81 \\ \therefore \:  \{2(t + 3) \}^{2} =  {9}^{2}  \\  \therefore \:  \{2(t + 3) \} =  {9}   \\  \therefore \: t + 3 =  \frac{9}{2}  \\ \therefore \: t  =  \frac{9}{2}  - 3 \\  \therefore \: t  =  \frac{9 - 6}{2}  \\  \therefore \: t  =  \frac{3}{2}  \\ \therefore \: t  =  1.5 \: hrs  \\ speed \: of \: car = 10(t + 3) \\ \hspace{60 pt} = 10(1.5 + 3) \\   \hspace{60 pt}= 10 \times 4.5 \\ \red{ \boxed{ \bold{ \therefore \: speed \: of \: car  = 45 \:km/ h}}} \\

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