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3 years ago

How to solve x^2-4x-5=0 by using the quadratic formula?

Mathematics

1 answer:

padilas [110]3 years ago

3 0

Answer:

x = 5 or -1, put numbers into the formula and calculate

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elena-14-01-66 [18.8K]

Step-by-step explanation:

The formula is given by :

$s=\dfrac{m}{360}\times 2\pi r$

We have,

m = 19° and d = 9 cm

So,

$s=\dfrac{19}{360}\times 2\pi \times \dfrac{9}{2}\\\\s=1.49$

Hence, this is the required soltion.

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2 years ago

(1 point) a study of 12,000 able-bodied male students at the university of illinois found that their times for the mile run were

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Jwwii22iqj2 with each week end with what questions qw

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2 years ago

25 points for this one plz help and explain how you got the answer!!

tia_tia [17]

Jorell is incorrect, because converting 18 out of 40 shots into a fraction is 18/40. In order to determine the percentage of shots which Jorell made, you can divide the two numbers. 18 divided by 40 is equal to .45. To convert .45 into a percentage, move the decimal over twice. Therefore, Jorell made 45% of the shots and not 40%.

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2 years ago

There are 98 balls in a box. 25 of them are red, 19 of them are green, 30 of them are purple, and 24 of them are blue. Suppose H

MatroZZZ [7]

Answer:

1.1348621526 X 10⁻¹³

Step-by-step explanation:

Number of Red balls=25

Number of Green balls=19

Number of Purple balls=30

Number of Blue=24

Total=25+19+30+24=98

Since the balls are picked with replacements, probability of picking a color will be the same all true.

P(Picking a red ball)= 25/98

P(Picking a green ball)= 19/98

P(Picking a purple ball)= 30/98

P(Picking a blue ball)= 24/98

P(2 red balls)= 25/98 X 25/98 = (25/98)²

P(5 green balls)= 19/98 X 19/98 X 19/98 X 19/98 X 19/98 =(19/98)⁵

P(10 purple balls)= 30/98 X 30/98 X 30/98 X 30/98 X 30/98 X 30/98 X 30/98 X 30/98 X 30/98 X 30/98 =(30/98)¹⁰

P( 5 blue balls) =24/98 X 24/98 X 24/98 X 24/98 X 24/98 =(24/98)⁵

P(2 red balls, 5 green balls, 10 purple balls, and 5 blue balls) = (25/98)² X (19/98)⁵ X (30/98)¹⁰ X (24/98)⁵

=1.1348621526 X 10⁻¹³

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2 years ago

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You need to stabilize a flagpole by string in a guy-wire from the top of a flagpole to the ground. The pole is 15 feet tall and

Mandarinka [93]

Sinα=h/w

w=h/sinα, we are told that h=15 ft and α=70° so

w=15/sin70° ft

w≈15.96 ft (to nearest hundredth of a foot)

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2 years ago

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