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3 years ago

Solve the equation. x2 − 6x − 7 = 0 A) x = 7 B) x = 1 C) x = 1 or x = −7 D) x = −1 or x = 7

Mathematics

1 answer:

aniked [119]3 years ago

3 0

Answer:

Step-by-step explanation:

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At a recent meeting at the American College of Asthma, Allergy, and Immunology, researchers reported that allergy vaccinations a

marin [14]

Solution :

Here we can use the Binomial distribution, as there are only two possible outcomes.

The given data:

n = 150

q = 98%

= 0.98

p = probability of not finding relief = 1 - 0.98

= 0.02

A). The number of the individuals who do not find any relief from sinusitis is :

E(x) = np

= 150 x 0.02

= 3

B). The uncertainty of my estimate is = $\sqrt{npq}$

$=\sqrt{150 \times 0.02 \times 0.98}$

= 1.716

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3 years ago

If two pounds of meat will serve 5 people how many pounds will be needed to serve 13 people

natulia [17]

5.2 pound of meat is your answer

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4 years ago

Solve x2 - 10x = -21

ipn [44]

Answer:

add 21 to both sides to get everything on one side

x^2 - 10x + 21 = 0

do factorization, guess and check

(x - 7) (x -3) = 0

x =7, and x =3

8 0

3 years ago

Read 2 more answers

Factor the polynomial. 13x² – 20x – 12

erma4kov [3.2K]

Answer:

(13 x + 6) (x - 2)

Step-by-step explanation:

Factor the following:

13 x^2 - 20 x - 12

Factor the quadratic 13 x^2 - 20 x - 12. The coefficient of x^2 is 13 and the constant term is -12. The product of 13 and -12 is -156. The factors of -156 which sum to -20 are 6 and -26. So 13 x^2 - 20 x - 12 = 13 x^2 - 26 x + 6 x - 12 = x (13 x + 6) - 2 (13 x + 6):

x (13 x + 6) - 2 (13 x + 6)

Factor 13 x + 6 from x (13 x + 6) - 2 (13 x + 6):

Answer: (13 x + 6) (x - 2)

6 0

3 years ago

There is the picture of the problem i’m really having trouble with it could someone help me plz :)

blondinia [14]

Look at the attached picture ⤴

Hope it will help u...

✴Have a great day✴✴

6 0

3 years ago