3 years ago

What do double brackets around an x mean?

Mathematics

2 answers:

Anna [14]3 years ago

6 0

[[x]] means to round down to the greatest integer less than or equal to x.

fiasKO [112]3 years ago

5 0

Floor of function!
Idk

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Simplify completely 3x4+5x2+2x/x

Andre45 [30]

Step-by-step explanation:

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3 years ago

In a parking lot, 25% of the cars are SUV's and 40% of the cars are pick up trucks. the rest of the cars are sedand. there are 2

saw5 [17]

Answer:

It is 4:1

Step-by-step explanation:

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3 years ago

2ln(x+1)=ln(8x+28) solution to this equation

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x=9 Hope this works.. :D

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3 years ago

ball is thrown 40 meters above ground. the height of the ball from the ground level after t seconds is defined by using the func

padilas [110]

Answer:

The ball will take 8.90 seconds to hit the ground.

Step-by-step explanation:

The height of a ball after t seconds is given by:

$h(t)=40t-5t^2$

Determine how long will the ball take to hit ground level. Since the gound is 40 meters below the throwing point:

$40t-5t^2=-40$

Rearranging:

$5t^2-40t-40=0$

Simplifying by 5:

$t^2-8t-8=0$

Solving the quadratic equation with the formula:

$\displaystyle t=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

With a=1, b=-8, c=-8

$\displaystyle t=\frac{8\pm \sqrt{64+32}}{2}$

$\displaystyle t=\frac{8\pm \sqrt{96}}{2}$

There are two solutions:

t=8.90 sec, t=-0.90 sec

Due to the nature of the problem, t cannot be negative, thus:

The ball will take 8.90 seconds to hit the ground.

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3 years ago

What is the measure of dqm?

Alex17521 [72]

Answer: 58 degrees

Step-by-step explanation:

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3 years ago

Read 2 more answers