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Leviafan [203]
3 years ago
6

Find the zeroes of the polynomial using the quadratic formula.

Mathematics
1 answer:
babymother [125]3 years ago
6 0

Answer:

Step-by-step explanation:

2x² - 3x - 15 = 5

2x² - 3x - 20  = 0

Quadratic formula

x = [3 ± √(3² – 4·2(-20))] / [2·2]

 = [3 ± √169] / 4

 = [3 ± 13] /4

 = -2.5, 4

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If an object is launched at an angle of 28° with an initial velocity of 133 ft./s from a height of 6 feet how many seconds will
Tema [17]

Answer:

Hence after  3.98 sec  i.e  4 sec Object will hit the ground  .

Step-by-step explanation:

Given:

Height= 6 feet

Angle =28 degrees.

V=133 ft/sec

To Find:

Time in seconds after which it will hit the ground?

Solution:

<em>This problem is related to projectile motion for objec</em>t

First calculate the Range for object  and it is given by ,

R=v^2Sin(2Ф)/g

Here R= range  g= acceleration due to gravity =9.8 m/sec^2

1m =3.2 feet

So 9.8 m, equals to 9.8 *3.2=31.36 ft

So g=31.36 ft/sec^2. and 2Ф=2(28)=56

R=133^2*Sin(56)/31.36

R=14664.84/31.36

R=467.62  fts

Now using Formula for time and range as

R=VxT

Vx is horizontal velocity

Vx=V*cosФ

Vx=133*cos(28)

Vx=117.43  ft/sec

So above equation becomes as ,

467.62=117.43*T

T=467.62/117.43

T=3.98 sec

T is approximately equals to 4 sec.

4 0
3 years ago
Mike wrote down a number on a piece of paper and hid it from his friends. He rounded his number to different places and his frie
Naddik [55]

Answer: 145,998, 7,000, and 25,991

My guess :))

Step-by-step explanation:

145,998  7,002  4,506  26,991   12,497

<u>First, Mike rounded his number to the nearest ten</u>

146,000  7,000  4,510   27,000   12,500

<u>Then, he rounded his number to the nearest hundred.</u>

146,000  7,000  4,500  27,000   12,500

<u>Last, he rounded his number to the nearest thousand.</u>

146,000  7,000  5,000  27,000   12,000

3 0
2 years ago
Find the measure of each interior angle in a regular hexagon.
grigory [225]
120 the formula for interior angles of a shape is ((n-2)180)n
7 0
3 years ago
Read 2 more answers
Rewrite the equation in standard form 2x^2=5x+6
FrozenT [24]

Answer:

2x^{2} =5x+6\\

Step-by-step explanation:

8 0
2 years ago
Latika reads half as many fiction books as she reads nonfiction.She reads three times as many nonfiction books as mystery novels
telo118 [61]

Answer:

She read 15 fiction books

Step-by-step explanation:

Multiply 10 x 3 = 30

so she reads 30 non fiction books and she reads half as many fiction books as she reads nonfiction.

Divide 30/2=15

4 0
2 years ago
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