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3 years ago

5

Priya bought two plants for a science experiment. When she brought them home, the first plant was 5 cm tall and the second plant

was 4 cm. Since then, the first plant has grown 0.5 cm a week and the second plant has grown 0.75 cm a week. Priya represents this situation with the equation 5+0.5w=4+0.75w, where w represents the end of week w. What does the solution to this equation, w=4 represent in this situation?

1 answer:

Alexandra [31]3 years ago

6 0

Answer:

7

Step-by-step explanation:

5+0.5x4=4+0.75x4

5+2=4+0.75x4

7=4+3

7=7

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Write down the equation of a line that is parallel to the line with equation y=7-4X

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Answer:

$y=-\dfrac{13}{49}x^2$

Step-by-step explanation:

The shape of an arch corresponds to a parabola.

the general equation for a parabola is:

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we're given three coordinates: (-7,-13),(7,-13) and (0,0)

so we can plug these values in the general equation to make 3 separate equations:

(x,y) = (-7,-13)

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we've already found c = 0, let's use substitute it to other equations.

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------------------------------

$\quad\quad 98a=-26$

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Now we can plug this value of a in any of the two equations.

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$49\left(-\dfrac{13}{49}\right)-7b=-13$

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$y=\left(-\dfrac{13}{49}\right)x^2+0x+0$

$y=-\dfrac{13}{49}x^2$

$49y=-13x^2$

This our equation of the arch!

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Hello,

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