How do I give someone brainliest

1 answer:

3 0

First, you have to wait until 2 people answer your question. When you finally see 2 people, a crown will pop up on your browser. Then pick which ever person you want or the best answer. That's all you have to do.

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*** WHITE Given m|n, find the value of x. (2x-3) (6X+17)

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A glacier receded at a rate of 250 feet

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2 years ago

H=255-21t-16t^2<br><br> PLEASE HELP!!

Colt1911 [192]

Answer:

3.15 seconds is the answer.

<u>Explanation</u>

when the ball touches the ground, h =0

hence,

0=255-21t-16t²

16t²+21t-225=0

here a=16 ,b=21, c= -225

$t= \frac{ - b± \sqrt{ {b }^{2} - 4ac} }{2a} \\ \\ t= \frac{ - 21± \sqrt{ {21}^{2} - 4 \times 16 \times - 225} }{2 \times 16} \\ = \frac{ - 21 ± \sqrt{441 - ( - 14400)} }{32} \\ = \frac{ - 21± \sqrt{14841} }{32} \\ = \frac{ - 21±121.82}{32} \\ \\ t = \frac{ - 21 + 121.82}{32} \: or \: \: t = \frac{ - 21 - 121.82}{32} \\ t = 3.15 \: \: or \: \: t = - 4.46$

time cannot be negative, hence t = -4.46 can be avoided

The ball takes 3.15 seconds to hit the ground.

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3 years ago

abigail is putting tiles on a table top. she needs 48 tiles for each row of 8. each row will have 6 white tiles. the rest of the

AleksandrR [38]

If there are 48 tiles in each row then minus 48 - 6 white tiles = 42 purple tiles. And if there are 8 rows then 8 x 42 = 336. So Abigail needs 336 purple tiles.

hoped I helped

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