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MissTica
3 years ago
6

-5x^2 + 7x = -9 solve for quadratic formula

Mathematics
1 answer:
vlabodo [156]3 years ago
4 0
It has two roots
I’m trying to send you a picture but it doesn’t work
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What is the area of a regular hexagon with a distance from its center to a vertex of 1 cm? (Hint: A regular hexagon can be divid
devlian [24]
<h3>Answer:</h3><h3>Exact area = \frac{3}{2}\sqrt{3} square cm</h3><h3>Approximate area = 2.598 square cm</h3>

=================================================

Work Shown:

s = side length of equilateral triangle = 1 cm

A = area of equilateral triangle with side length 's'

A = \frac{\sqrt{3}}{4}*s^2

A = \frac{\sqrt{3}}{4}*1^2

A = \frac{\sqrt{3}}{4}

This is just one of the 6 equilateral triangles (see diagram below)

Multiply by 6 to get the area of all 6 equilateral triangles, or the entire hexagonal area

6*A = 6*\frac{\sqrt{3}}{4}

6A = \frac{3\sqrt{3}}{2}

6A \approx 2.598

4 0
3 years ago
Neglecting air resistance and the weight of the propellant, determine the work done in propelling a four-ton satellite to the fo
balandron [24]

Answer:

Step-by-step explanation:

Work = force × distance

force = mass × acceleartion due to gravity

a four ton satellite will have a force of 4× 1000 ×10 = 40KN (1000Kg = 1 ton)

1 mile = 1609.34 metre

therefore (a) 100 miles above the earth

work = 40000 × 100×1609.34

= 6437360000J

=6.4GJ

(b) 300 miles above the earth

work = 40000×300×1609.34

= 1.93×10¹⁰ J

4 0
3 years ago
Hannah just put a 36-foot long
VARVARA [1.3K]

Answer:

perimeter=sum of all sides

p=2(L+W)

36=2(L+12)

36-24=2L

12=2L

L=6

8 0
3 years ago
It takes Andre 4 minutes to swim 5 laps. How many laps per minute is that?<br> pls what is this
Blababa [14]

It takes Andre 1.25 minutes to swim a lap.

Step-by-step explanation:

7 0
2 years ago
According to a study conducted by an​ organization, the proportion of Americans who were afraid to fly in 2006 was 0.10. A rando
krek1111 [17]

Answer: Even is not unusual.

Step-by-step explanation:

Given:

P = 0.10

n = 1200

x = 132

1. Sample of proportion ( ˆp ) = x/n

= 132/1200

= 0.11

2. Z = ˆp - p / √p ( 1 - p )/ n

= 0.11 - 0.10 / √0.10 ( 1 - 0.10 ) / 132

= 0.01 / 0.02611

= 0.3829

3. Probability

P ( ≥ 132 ) = P( Z > 1.50 ) = 1 - P( Z > 1.50 )

= 1 - 0.9332

= 0.0668

The probability is higher than (0.05). Which makes the event unusual, therefore there is no enough evidence which suggest that the number of Americans who are afraid to fly has increased.

4 0
4 years ago
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