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kvasek [131]
3 years ago
10

If a 15 foot tree cast a 40 foot shadow, how tall is a tree that cast 64-foot shadow

Mathematics
1 answer:
marissa [1.9K]3 years ago
4 0

Answer:

24 feet

Step-by-step explanation:

Set up a ratio which is 15/x=40/64 and cross multiply to get 960=40x and divide to get 24

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Solve the system of equations given . -2x+5y=-3
algol13

For this case we have the following system of equations:

-2x + 5y = -3\\y-15 = 3x

We multiply the second equation by -5:

-5y + 75 = -15x

Now we add the equations:

-2x-5y + 5y + 75 = -3-15x\\-2x + 75 = -3-15x\\-2x + 15x = -75-3\\13x = -78\\x = \frac {-78} {13}\\x = -6

We find the value of the variable "y":

y = 3x + 15\\y = 3 (-6) +15\\y = -18 + 15\\y = -3

THE solution is: (-6, -3)

Answer:

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3 years ago
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PYTHAGOREAN THEOREM

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3 years ago
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