Determine how long it will take for a principal amount of $13,000 to double its initial value when deposited into an account paying interest at a rate of 21.4 percent, continuously compounded

Answer:

x=-4.5 x=-0.5

y=-1

vertex=-2

Answer:

1, -1 and 2

Step-by-step explanation:

The zeros of the given polynomial function are 1, -1 and 2

Given the polynomial function

First, we need to assume a value of x to check if it will give us zero after substituting:

Assuming x = 1

Since f(1) =0, hence x - 1 is a factor

Dividing x - 1 by the given polynomial function, we will have:

Equating the result to zero

x + 1 = 0 and x - 2 = 0

x = -1 and 2

Hence the zeros of the given polynomial function are 1, -1 and 2

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The equation which is useful to find the amount in gallons of water to the number of minutes since filling started is 25 + 11x therefore, it takes 5 minutes to have 80 gallons of water.

Determine the known quantities and designate the unknown quantity as a variable while trying to set up or construct a linear equation to fit a real-world application.

The amount of water initially in the trough = 25 gallons.

The rate of adding water = 11 gallons per minute

Therefore, the total amount (A) of water in x minutes will be,

A = 25 + 11x

The number of minutes to have 80 gallons of water is,

80 = 25 + 11x

11x = 55

x = 5 minutes.

Hence "The equation which is useful to find the amount in gallons of water to the number of minutes since filling started is 25 + 11x therefore, it takes 5 minutes to have 80 gallons of water".

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Answer:

A number closer to 0 is generally less than a number more away from 0. When it comes to negative numbers the closer the number to 0, the greater it is.

Step-by-step explanation:

If you need further help please let me know.

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Answer: 48

Step-by-step explanation:
Convert 40% to a decimal = 0.4
Multiply 0.4 x 120 = 48

Answer:

48

Step-by-step explanation:

40\100×120

=48

( fourth divided by one hundred multiplied by one hundred and twenty is equal to 48)

The percentage of students that use other means to travel school is  24%

Percentage is the ratio of  the number for which you want to find  percentage to the total number with which you want to compare or out of and multiply this ratio with 100.

percentage = (part / whole) ×100

Given that a school has 825 total students.

Percentage of students travelling by car = 20%

Percentage of students travelling by bus = 48%

Percentage of students travelling by bicycle = 8%

Number of students travelling by car = 20% of 825 = (20/100)×825 = 165

Number of students travelling by bus = 48% of 825

= (48/100)×825 = 396

Number of students travelling by bus  = 8% of 825 = (8/100)×825 = 66

Number of students travelling by other means = 825-165-396-66 = 198

Therefore, the Percentage of students travelling by other means  = (198/825) ×100 = 24%

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Answer:

D

Step-by-step explanation:

the equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b ) a point on the line

calculate m using the slope formula

m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]

with (x₁, y₁ ) = (- 2, 1) and (x₂, y₂ ) = (1, 7) ← 2 points on the line

m = [tex]\frac{7-1}{1-(-2)}[/tex] = [tex]\frac{6}{1+2}[/tex] = [tex]\frac{6}{3}[/tex] = 2

use either of the 2 points on the line

using (- 2, 1 ) , then

y - 1 = 2(x - (- 2) ) , that is

y - 1 = 2(x + 2) ← equation in point- slope form

The solutions to the system of equations are x=5, z=1,y=-3

What is system of equations?

Given equations:

x+y+z=3

3x+(y/3)-2z=12

-5x-6y+3z=-4

Solving by using the substitution method:

[tex]\begin{bmatrix}x+y+z=3\\ 3x+\left(\frac{y}{3}\right)-2z=12\\ -5x-6y+3z=-4\end{bmatrix}[/tex]

Substitute x=3-y-z

[tex]\begin{bmatrix}3\left(3-y-z\right)+\frac{y}{3}-2z=12\\ -5\left(3-y-z\right)-6y+3z=-4\end{bmatrix}[/tex]

Substitute z={8y+9}/{15}

[tex]\begin{bmatrix}-y+8\left(-\frac{8y+9}{15}\right)-15=-4\end{bmatrix}[/tex]

simplify

[tex]\begin{bmatrix}\frac{-79y-72}{15}-15=-4\end{bmatrix}[/tex]

Substitute y=-3

[tex]z=-\frac{8\left(-3\right)+9}{15}[/tex]

z=1

For x=3-y-z

Substitute z=1,y=-3

x=3-(-3)-1

x=5

The solutions to the system of equations are:

x=5, z=1,y=-3

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They are similar because they have the same slope the equation is

y = -2/3x + 531

What is in slope-intercept form?

changing 2x+3y=1470 to slope intercept form is solving for y

minus 2x both sides and divide by 3

y = -2/3x + 490

the slope is -2/3

the y intercept is y=490 or the point (0,490)

to graph it, I would start at the origin and go up 490 units on the y axis and put a point there

then go -2 units up (2 down) and 3 to the right and put a point there

then connect the 2 points with a line

in function notation, replace y with f(x) to get

y = -2/3x + 490

graph below

intercepts labeled

2x+3y=1593

they are similar because they have the same slope

the equation is  y = -2/3x + 531

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Answer: 4:30

Step-by-step explanation:

Answer:

oh palak cl NC do off is sold em Ms do off do off dlc so off do off sum is sold arrowroot

Given Data:

The initial investment is: P=$100

The total period of investment is: t=3

The annual interest is: 6%.

For the simple interest, the expression to calculate the interest in t years is,

Here r is in percentage.

Substitute known values in the above expression.

Thus, the total intrest for 3 years will be $18.

Answer:

Must be less than 12.15 dm

Step-by-step explanation:

The total number of questions that Fred answered incorrectly is 8.

From the information given, a perfect score on a test with 25 questions is 100 and each question is worth 4 points while Fred got a score of 68 on the test.

Therefore, let the number of questions that are got be x.

Based on the information given, this will be:

4 × x = 68

4x = 68

Divide

x = 68 / 4 = 17

The number of questions that he missed will be:

= Total questions - Correct answers.

= 25 - 17.

= 8

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Answer:

8.33

Step-by-step explanation:

He has to be at work by 10:30, but it takes 20 mins to walk

So, 10:30-20 minutes=10:10

We then look at the arrival time closest to this, which would mean he would arrive at 10.06.

trace this back the bus would gett him at 8:38, but its a 5min walk.

8:38-5 minutes+8.33

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The complementary angle of the angle is 11.7 degrees

Angles are formed when two or more lines intersect. This in other words means that angles is the measure of space between the intersection of rays or lines

The measure of the angle is given as

Angle = 78.3 degrees

Complementary angles add up to 90 degrees

So, we have the other angle to be

Other angle = 90 - 78.3

Evaluate the difference

Other angle = 11.7

Hence, the other angle is 11.7

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The average pay-per-hour of the year for Elise will be 13.73 pounds.

From the information, in 2016 she earned £2100 and in 2017 she was awarded a 3% increase on her monthly salary.

Therefore, the new salary will be:

= 2100 + 3%(2100)

= 2100 + 63

= 2163

Now she worked for 42 hours per week for 45 weeks. This will be:

= 42 × 45

= 1890 hours

Therefore, the total earnings for the year will be:

= 2163 × 12 months

= 25956

The average pay-per-hour of the year will be:

= Total amount / Number of hours

= £25956 / 1890

= £13.73

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Answer: r=-26

Step-by-step explanation:

[tex]\displaystyle\\(5,r)\ \ \ \ (10,1)\ \ \ \ slope \ m=5\\\\\boxed {m=\frac{y_2-y_1}{x_2-x_1} }\\\\x_1=5\ \ \ \ \ x_2=10\ \ \ \ \ y_1=r\ \ \ \ y_2=-1\ \ \ \ \ m=5\\\\Hence,\\\\5=\frac{-1-r}{10-5} \\\\5=\frac{-1-r}{5}[/tex]

Multiply both parts of the equation by 5:

[tex]5(5)=-1-r\\\\25=-1-r\\\\25+r=-1-r+r\\\\25+r=-1\\\\25+r-25=-1-25\\\\r=-26[/tex]

The series of rotations are : (x, y) -----> (y, -x) → (y, -x) ----> (x, y).

The total rotation is 360 degrees. So the figure is the original figure itself.

First a figure is rotated 270 degrees counterclockwise about the origin.

A 270 degree counterclockwise rotation is given by the co-ordinate transformation, (x, y) -----> (y, -x)

Then the figure is again rotated 90 degrees counterclockwise about the origin. A 90 degree counterclockwise rotation is given by, (x, y) -----> (-y, x)

So combining with the above transformation, the 90 degree counterclockwise rotation gives, (y, -x) ----> (x, y).

Thus the total rotation transformation is in turn, (x, y) ----> (x, y).

Thus the total rotation in counterclockwise direction about the origin is 360 degrees. So the final figure is the original figure itself.

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The set of the value for which the curve and line have no common point are is k ∈ (0 , 4).

The value for which the line is a tangent is k = 4.

The coordinates of the point where the line touches the curves is point of tangency = ( 1/2 , 2).

What is tangent?

Tangents in geometry are lines or planes that contact curves or surfaces at points where they are closer to the curve than any other lines or planes drawn through those points.

Given equations in the question:

y = kx² + 1  

y = kx

Equating y

kx² + 1   = kx

kx² -kx  + 1 =  0

This is Quadratic equation is of the form ax²+bx+c=0  where a  , b and c are real also  a≠0.

D =  b²-4ac is called discriminant.

and we know that,

D >0 roots are real and distinct

D =0 roots are real and equal

D < 0 roots are imaginary ( not real ) and different

For no common solution  D < 0

For tangent  D = 0

so,

kx² -kx  + 1 =  0

D = (-k)² - 4k  = k² - 4k = k(k - 4)

k(k - 4) < 0

if  0 < k < 4

Hence values of k for which the curve and the line have no common points is k ∈ (0 , 4).

for tangent

k(k - 4)  = 0

k is non zero

Hence k = 4

After putting the value of k, given equations are:

y = 4x² + 1  

y = 4x

solving these equations to get value of x and y:

4x² + 1   = 4x

4x² - 4x + 1 = 0

(2x - 1)² = 0

x = 1/2

y = 2

Point of tangency = ( 1/2 , 2)

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The horizontal asymptote is y = -2

The horizontal asymptote is an equation of the form y = k, for some constant k, is a straight line parallel to x-axis.

Horizontal asymptotes are found for rational functions of polynomials when x becomes extremely large, or, as x → ∞.

The function given is, f(x) = (-2x²+3x+5)/(x²+1)

Horizontal asymptote is given by,

y = [tex]\lim_{x \to \infty} \frac{-2x^2+3x+5}{x^2+1}[/tex]

   =  [tex]\lim_{x \to \infty} \frac{x^2(-2+\frac{3}{x} +\frac{5}{x^2}) }{x^2(1+\frac{1}{x^2}) }[/tex]

   =  [tex]\lim_{x \to \infty} \frac{(-2+\frac{3}{x} +\frac{5}{x^2}) }{(1+\frac{1}{x^2}) }[/tex]

   = -2

So the horizontal asymptote of f(x) is, y = -2

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Answer:

A) y = -2

Step-by-step explanation:

The rules to find the horizontal asymptote (HA) is shown below

Y = A if the numerator and denominator have same highest exponent for example

A^3

B^3

Y = 0 if the numerator have lower exponent and denominator have higher exponent for example

A^1

B^2

None HA if the numerator have higher exponent and denominator have lower exponent for example

A^2

B^1

And the equation shown in the question have same exponent so the answer is -2

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Answer:4

Step-by-step explanation:

image dimension = 24 by 6 feet

preimage dimension = 32 by 8 feet

so 24/6 = 32/8 = 4

scale factor = 4

The percentage 20% of the costs y is given as 0.20y thus the expression which represents the price of the item after the discount is P = y - 0.20y.

The percentage is just like the amount of that value but between 1 to 100 and it is very useful to predict for example if you say 678 then we have to know about the full number also but if you say 80% then it becomes clear.

It is known that x% of something y is given as,

x% of y = (x/100)y

Given that discount of 20% of y

20% of y = (20/100)y

20% of y = 0.20y

Now the final price = initial price - discount

Final price (P) = y - 0.20y

Hence"The percentage 20% of the costs y is given as 0.20y thus the expression which represents the price of the item after the discount is P = y - 0.20y".

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Answer:

311/55

Step-by-step explanation:

i devided each by 2 and got this then i looked it up and it said this so id k

hope this helped

Answer:

This is your graph to the following equation f(x) = 1/4(x) - 7

The percentage of the people surveyed that arrive at their office after 7am is 6.7%.

The percentage of the people surveyed that arrive at their office after 7:59 am is 64%

From the information, Miranda did a survey of what time people get to their office on Monday morning and the table shows her results.

The number of people that arrived before 7.59am is 15.

The total number of people surveyed will be:

= 15 + 39 + 75 + 21

= 150

The percentage of the people surveyed arrive at their office before 7 am will be:

= 10 / 150

= 6.7%

The percentage of the people surveyed that arrive at their office after 7:59 am will be:

= (75 + 21) / 150.

= 96/150

= 0.64

= 64%

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Answer:

the number of people is 15 so you would do 15/150=10percent

b) 66 percent

Step-by-step explanation: