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3 years ago

What is the answer? trying hard here

Mathematics

1 answer:

kumpel [21]3 years ago

6 0

You basically have to use the quadratic formula to solve this since there are no factors of - 9 which add to give 6.
$x = \frac{ - b + - \sqrt{ {b}^{2} - 4ac} }{2a}$
Then you use
$a {x}^{2} + bx + \: c$
To find which numbers will go into what place inside the quadratic equation.

So a = 1 (because x is alone)
b = 6
c = -9

Then you solve it. I've included a picture of how I did it and I got the answer x=-3+-3sqrt2

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How much fabric is required to cover x buttons in the shape of a circle whose radius is 3x ?

Leviafan [203]

Radius of 1 button = r = 3x

Fabric required to cover 1 button = Area of the circle

= $\pi r^{2}$

= $\pi (3x)^{2}$

= $9\pi x^{2}$

Total number of buttons = x

Fabric required to cover 1 button = $9\pi x^{2}$

Fabric required to cover x buttons = $x(9\pi x^{2} )$

$=9\pi x^{3}$

Hence, fabric required to cover x buttons $=9\pi x^{3}$ sq. units

3 0

3 years ago

The town Atlanta needs $14,000 for a new playground Lanzetta Elementary school raise $5358 Lantana middle school race $2834 Atla

Elza [17]

Lanzetta Elem. raised 5358....round to 5,000
Lantana Mid. Sch raised 2834....round to 3,000
Atlanta High Sch. raised 4132...round to 4,000

they need 14,000...they have (5,000 + 3,000 + 4,000) = 12,000....so they will need (14,000 - 12,000) = 2,000 more....keep in mind, these are estimates...not exact answers

3 0

3 years ago

Jorge received a 3.1% increase in his pay at work. If he now makes $18.00 per hour, how much was he making before his raise? (Ro

g100num [7]

18 times .031 is .558
18 dollars minus .558 cents is 17.442
Answer is he was maki 17.442 dollars before the increase

6 0

2 years ago

The population of a small town can be modeled by the equation where t is the number of years since the collection of the populat

liberstina [14]

The true statements is the population was 4800 when the collection of data began. (3rd option)

<h3>What is an exponential function?</h3>

An exponential equation can be described as an equation with exponents. The exponent is usually a variable.

The general form of exponential equation is f(x) = $e^{x}$

Where:

x = the variable
e = constant

When a population grows at an exponential rate, it usually has compound rate of growth. Compound growth refers to the geometric progression of a variable.

The exponential equation used to represent an exponential growth usually have this form:

FV = PV (1 + r)^n

Where:

FV = future population
PV = present population
r = rate of growth
n = number of years

Given this exponential equation : f(x) = 4800 (1.02)^t

4800 = initial population or population when the data collection began
2 % = rate of growth
t = number of years

To learn more about exponential functions, please check: brainly.com/question/26331578

#SPJ1

7 0

1 year ago

Savannah had 400 chocolate chips. She used 40 chips for another dish, and mixed the rest of the chips evenly into 3 pans of brow

sweet [91]

full work: 400-40=360, 360/3=120 she used 120 chips in each pan.

hope this helps

8 0

3 years ago