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3 years ago

5

Factor: 2x^2-3x-20=0

1 answer:

Anon25 [30]3 years ago

4 0

Answer:

x=-5/2,4

Step-by-step explanation:

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Tell me something funny and I’ll mark you brainliest!

prohojiy [21]

Answer:

what do you call a white person having a seizure...............................milk-

shake

Step-by-step explanation:

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3 years ago

A research firm conducts a sample survey and discovers that, of all the new watchers of three-dimensional tv, 77% have not repor

faust18 [17]

Answer: +/- 0.018

All you have to do is plug the known values into the equation and evaluate it.

First, do the work under the square root sign. 0.77(1-0.77) / 2100 gives you a very small number. If you take the square root of that, you will have 0.0091.

The last step is to just multiply that by 2 and you will have 0.018

8 0

3 years ago

An engineering school reports that 59% of its students are male (M), 39% of its students are between the ages of 18 and 20 (A),

KIM [24]

Answer:

.26

Step-by-step explanation:

.59 = M

.39 = A

.24= M∩A

M'∩A'= ?

M'∩A'= (M∪A)' (we call this demorgan's law)

MUA= M+A-M∩A

.59+.39-.24= .74

1-.74= .26

4 0

3 years ago

The smallest exterior angle of a polygon is 40degrees the largest exterior angle is 80 degrees a) what is the smallest possible

love history [14]

Answer:

a) The smallest possible number of sides of the polygon is a regular polygon with 5 sides

b) The largest possible number of sides of the polygon is a regular polygon with 9 sides

Step-by-step explanation:

a) The smallest exterior angle of the polygon = 40°

The largest exterior angle of the polygon = 80°

Therefore, we have the interior angles are;

The smallest interior angle of the polygon = 180° - 40° = 140°

The largest interior angle of the polygon = 180° - 80° = 100°

Therefore, we have

The interior angles of a regular polygon are given by the following formula;

$Interior \ angle =\dfrac{(n-2) \times 180 ^{\circ}}{n}$

For an interior angle of 100°, we have;

$100^{\circ} =\dfrac{(n-2) \times 180 ^{\circ}}{n}$

100/180 × n = n - 2

2 = n - 100/180 × n = 4/9·n

2 = 4/9·n

n = 18/4 = 4.5

Therefore, given that a square has an interior angle of 90° we have the smallest possible number of sides polygon = 5 sides

b) For 140°, we have;

$140^{\circ} =\dfrac{(n-2) \times 180 ^{\circ}}{n}$

140/180 × n = n - 2

2 = n - 140/180 × n = 2/9·n

2 = 2/9·n

n = 18/2 = 9

n = 9 sides

Therefore, the largest possible number of sides = 9 Sides.

4 0

3 years ago

Enter the equation of the circle described below.<br> Center (0,4), radius V3

Alla [95]

Answer:

The equation is:

$(x - 0)^2 + (y - 4)^2 = 3$

Step-by-step explanation:

The equation of a circle:

$(x - h)^2 + (y - k)^2 = r^2$

(where $(h, k)$ represents the center and $r$ the radius).

-Use the given center and radius for the equation of a circle:

$(x - 0)^2 + (y - 4)^2 = \sqrt{3} ^2$

After, you have the equation of a circle written, simplify the radius by the exponent $2$ :

$(x - 0)^2 + (y - 4)^2 = 3$

So now, you have found the equation of a circle.

8 0

3 years ago