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2 years ago

8

Joan has a square flower bed with a side length of 5 meters filled with tulips. there are a total of 375 tulips in the bed. find

the density of tulips
for the area of the bed. round to the nearest tenth if necessary.

1 answer:

erma4kov [3.2K]2 years ago

8 0

Answer:

the answer is 15

Step-by-step explanation:

density= total population/surface area

density= 375/5^2

density=375/25=15

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Step-by-step explanation:

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3 years ago

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3 years ago

The graph of a quadratic function contains (4,-64) and it's vertex is at the origin.write an equation for this function.

lesya692 [45]

Answer:

Step-by-step explanation:

Not sure what form you need this in, but it really doesn't matter, as you'll see in the final equation. I used the vertex form and solved for a:

$y=a(x-h)^2+k$

We are given the vertex (h, k) as the origin (0, 0), and we have a point that the graph goes through as (4, -64). That's our x and y. Plugging in what we have:

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3 years ago

Solve the following pairs of simultaneous equations.

Sergeeva-Olga [200]

Answer and step-by-step explanation:

a) -4x + 5y = -9 (2)

2x + 3y = 21

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4x + 6y = 42 (1)

Use (1) plus with (2), you will get:

4x + (-4x) + 6y + 5y = -9 + 42

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y = 33/11

y = 3

4x + 18 = 42

4x = 24

x = 6

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Multiply first equation by 3, you will get:

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Multiply the second equation by 2 and you will get:

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Subtract (1) by (2), we got:

6x -6x + 15y - 4y = -18 - 4

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Multiply the first euation by 2, we got:

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Use (3) minus for (2), we get:

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y = 80 / -4

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Multiply the first equation by 2, we got:

4x - 6y = 12 (2)

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4x -4x - 5y - 6y = 9 -12

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I don't know how to solve this, sr

Hope this helped :3

3 0

3 years ago