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jarptica [38.1K]
2 years ago
12

Solve using the quadratic formula. Round answers to the nearest hundredth. 6x^2-14x-9=0

Mathematics
1 answer:
miv72 [106K]2 years ago
7 0

Answer:

use the quadratic formula

Step-by-step explanation:

from the equation a=6 b=-14 c=-9

from the quadratic formula

x = ( - b  {+ or - }   \sqrt{ {b}^{2}  + 4ac} ) \div 2a

therefore insert in the values of a, b and c

x = ( - ( - 14) + or -  \sqrt{ {(  - 14)}^{2}  + 4 \times 6 \times ( - 9)} ) \div 2 \times 6

x=2.858148594

X=-0.52481526

after inserting

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kotegsom [21]

9. -5(4+6r)

-20-30r

-20-30(4)=-20-120=-140

10. -9-n/3

-9-9/3=-9-3=-12

answers: -140, -12

7 0
3 years ago
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Identify the location of the values used to create a box
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Answer:A= minimum value

B=lower quartile

C=median

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Step-by-step explanation:

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Ghella [55]

Answer:

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Step-by-step explanation:

To answer this question, just add:

163.63 + 133.46 = 297.09

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Hope this helps :)

5 0
3 years ago
The angle of depression from the top of a cruise ship to the top of a sailboat is 22. Sitting above water, the cruise ship is 23
dusya [7]

Answer:

The distance between the cruise ship and the sail boat is 517 feet.

Step-by-step explanation:

The cruise ship is 236 feet tall, and the sailboat is 236 tall; this means the distance between the top of the cruise ship and the top of the sail boat is

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We also know that the angel of depression from the top of the cruise ship to the bottom of the cruise ship is 22°. This forms a right triangle as shown in the figure attached.

Now from trigonometry we get:

tan \: \theta = \dfrac{209}{d}

d= \dfrac{209}{tan\:\theta }

\boxed{d=517ft}

The distance between the cruise ship and the sailboat is 517 feet.

3 0
3 years ago
What is the experimental probability a quarterback will complete his next pass if he has completed 30 of his last 40 passes?
Elden [556K]

Answer:

75%

Step-by-step explanation:

We know that the quarterback has completed 30 of 40 passes. This means that the ratio of completed passes to total passes is 30:40. Converting this to a fraction, we get 30/40, which can be simplified to 3/4. 3/4 as a percentage is 75%. Therefore, the final answer is 75%.

6 0
3 years ago
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