3 years ago

Multiply & simplify: (2a - 3)(2a + 1)

Mathematics

1 answer:

RoseWind [281]3 years ago

3 0

I hope this helps you

2a.2a+1.2a-3.2a-3.1

4a^2+2a-6a-3

4a^2-4a-3

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The slope should be one over two.

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3 years ago

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3 years ago

A spotlight on the ground shines on a wall 12 m away. If a man 2 m tall walks along the x-axis from the spotlight toward the bui

Sedbober [7]

Answer:

0.675 m/s

Step-by-step explanation:

Let height of shadow= y,CD=x

Height of man=2 m

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$x\frac{dy}{dt}=-y\frac{dx}{dt}$

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When the man is 4 m from the building

Then, we have x=12-4=8 m

$\frac{dx}{dt}=1.8 m/s$

Substitute the values in above equation then, we get

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Substitute the values then we get

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Hence, the length of his shadow on the building decreasing at the rate 0.675 m/s.

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3 years ago

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katovenus [111]

Answer:

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Step-by-step explanation:

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3 years ago

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kap26 [50]

Answer:

0.36 cents

Step-by-step explanation:

1.80/5=0.36 <----answer

To check you can do 0.36x5 and get 1.80

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3 years ago