text Jim Belushi Lanka Lanka ​

Answer:

-132

Step-by-step explanation:

When you plug in -8 to every x you get -2(8)^2+2(8)-20 which gives you -132.

The percentage of the 9th grade population did you sample is 80%.

First, let's find out how many students were in the sample. The problem doesn't provide this information directly, so we'll assume that the sample size was given to you. For the sake of this explanation, let's say that the sample size was 200 students.

Next, we need to find out the total number of 9th-grade students in the school. The problem tells us that there are 250 9th-grade students in the school, so we'll use that number.

Using the values we've found, we can plug them into the formula:

percentage = (200/250) x 100%

percentage = 0.8 x 100%

percentage = 80%

In this problem, the fraction we calculated was 0.8, which means that 80% of the 9th-grade population was included in the sample. So the answer is indeed 80%, as you suspected.

To know more about percentage here

https://brainly.com/question/13729841

#SPJ4

The probability of the spinner stopping at a polka-dot section and then stopping at a solid white section is 1/8.

The probability of the spinner stopping at a polka-dot section and then stopping at a solid white section is 1/4.A spinner is a gambling tool used for games and competitions. Spinning games are frequently based on chance, and players frequently wager money or other objects on the result.

When it stops, a pointer will land on one of many different numbered segments of the spinner, each of which corresponds to a particular reward or consequence. Spinning games are frequently based on chance, and players frequently wager money or other objects on the result. Probability is the study of the likelihood of events taking place.

Probability is expressed as a fraction, decimal, or percentage and is always between 0 and 1. The probability of an event can be calculated using the following formula: Probability = number of favorable outcomes / total number of possible outcomes. Given the spinner has a polka-dot section, 2 white sections, and 1 shaded section, it has a total of 4 sections.

Therefore, the probability of the spinner stopping at a polka-dot section is 1/4.Also, after the first spin, the spinner still has 2 white sections. Therefore, the probability of stopping at a solid white section is 2/4 or 1/2 (since there are only 2 possible outcomes after the first spin).

To determine the probability of the spinner stopping at a polka-dot section and then stopping at a solid white section, we must multiply the probability of each event.1/4 × 1/2 = 1/8

Hence, the probability of the spinner stopping at a polka-dot section and then stopping at a solid white section is 1/8.

Know more about  probability  here:

https://brainly.com/question/25839839

#SPJ8

Answer:

23/12 (or) 1.917

Step-by-step explanation:

5 3/4 = 5+3/4

(23)/4=5.75

5.75/(1/3) (or) 5.75/3

=1.916666

x^2 - 5 this will be the equation formed.

An exponent is the number of times a number is multiplied by itself. For example, 2 to the third (written as 23) means: 2 x 2 x 2 = 8. 23 is not the same as 2 x 3 = 6. Remember that a number raised to the power of one is itself.

let the number be x

x^2 - 5 this will be the equation formed

learn more about exponents here :

brainly.com/question/5497425

#SPJ1

The probability distribution at each point x along the horizontal axis.

For a Normal distribution with mean 0 and standard deviation 1,

the following Python line outputs the probability p(-0.15 < x < 1.88):

print(st.norm.cdf(1.88, 0, 1) - st.norm.cdf(-0.15, 0, 1))

Probability is the likelihood or chance that an event will occur. It is a number between 0 and 1, with 0 indicating that an event will never occur and 1 indicating that an event will always occur.

Probability values range from 0 to 1, with a value of 0 indicating that the event will never occur and a value of 1 indicating that the event will always occur.

The probability is the value between 0 and 1 that indicates the likelihood of an event occurring. The probability is obtained by dividing the number of ways an event can occur by the total number of possible outcomes.

Scipy.stats.norm is the normal distribution's probability density function (pdf) in SciPy.

The PDF function is a part of the scipy.stats library in Python. The probability density function of the normal distribution is the function scipy.stats.norm.pdf(x, loc=0, scale=1). It is the height of the probability distribution at each point x along the horizontal axis.

Learn more about probability

brainly.com/question/11234923

#SPJ11

Answer:

y-intercept : 3

x-intercepts are 1 and 2

Vertex is at (2,-1)

Axis of symmetry is at x = 2

Step-by-step explanation:

See attached graph.

The equation y = x² – 4x + 3 represents a parabola

y-intercept at is at B(0,3); y-intercept is 3

x-intercept points at C(1,0) and D(3,0) so x-intercepts are 1 and 3

The vertex is the lowest point on this parabola (2-1)

Axis of symmetry is a line passing through the vertex and dividing the parabola into two equal halves. This is the vertical line x = 2

Answer:

that would be 1/2 because its the only one that could reduce the numbers.

Step-by-step explanation:

hope this helps,

kleann

The scale factor of the triangle ΔABC to ΔDEF will be 1/2. Then the correct option is A.

Dilation is the process of increasing the size of an item without affecting its form. Depending on the scale factor, the object's size can be raised or lowered. There is no effect of dilation on the angle.

The triangle ΔABC is similar to the triangle ΔDEF. Then the ratio of the corresponding sides will be constant. Then the scale factor is calculated as,

SF = 10 / 20

SF = 1 / 2

The scale factor of the triangle ΔABC to ΔDEF will be 1/2. Then the correct option is A.

More about the dilation link is given below.

https://brainly.com/question/2856466

#SPJ7

Answer:

the area of the sector is 6π square inches.

Step-by-step explanation:

First, we need to find the length of the arc that bounds the sector.

The circumference of the circle is 2πr, where r is the radius, so the circumference of this circle is 2π(3) = 6π inches.

To find the length of the arc that bounds the sector, we need to find what fraction of the circumference the central angle measures. The whole circle has a central angle of 360°, so if the central angle of the sector is 240°, then the fraction of the circle that it bounds is 240°/360° = 2/3.

Therefore, the length of the arc that bounds the sector is (2/3) * 6π = 4π inches.

Now, to find the area of the sector, we need to use the formula:

area of sector = (central angle / 360°) * πr^2

Plugging in the values we have:

area of sector = (240° / 360°) * π(3)^2

area of sector = (2/3) * 9π

area of sector = 6π

So the area of the sector is 6π square inches.

Therefore, the maximum displacement of the particle is 4 units, and it occurs at time t = 1.

To find the maximum displacement, we need to first determine the particle's velocity and acceleration.

The velocity of the particle is given by the derivative of its position function:

\(v(t) = y'(t) = 3t^2 - 12t + 9\)

The acceleration of the particle is given by the derivative of its velocity function: a(t) = v'(t) = 6t - 12

Now, to find the maximum displacement, we need to find the time at which the particle comes to rest.

This occurs when its velocity is zero:

\(3t^2 - 12t + 9 = 0\)

Simplifying this equation, we get:

\(t^2 - 4t + 3 = 0\)

This quadratic equation factors as:

(t - 1)(t - 3) = 0

So the particle comes to rest at t = 1 or t = 3.

Next, we need to determine whether the particle is at a maximum or minimum at each of these times.

To do this, we look at the sign of the acceleration:

When t = 1, a(1) = 6(1) - 12 = -6, which is negative.

Therefore, the particle is at a maximum at t = 1.

When t = 3, a(3) = 6(3) - 12 = 6, which is positive.

Therefore, the particle is at a minimum at t = 3.

Finally, we need to find the displacement of the particle at each of these times:

\(y(1) = 1^3 - 6(1)^2 + 9(1) = 4\)

\(y(3) = 3^3 - 6(3)^2 + 9(3) = 0.\)

For similar question on displacement.

https://brainly.com/question/1581502

#SPJ11

Answer:

\(\huge\boxed{\sf 2a^2-13b^2+12abc}\)

Step-by-step explanation:

\(=6a^2-4b^2+4abc-9b^2-4a^2+8abc\\\\Combine \ like \ terms\\\\=6a^2-4a^2-4b^2-9b^2+8abc+4abc\\\\=2a^2-13b^2+12abc\\\\\rule[225]{225}{2}\)

Answer:

Hello! The answer is: \(2a^2 - 13b^2 + 12abc\)

Step-by-step explanation:

\(6a^2 - 4b^2 + 4abc - 9b^2 - 4a^2 + 8abc\)

Rearrange to combine like terms:

\(6a^2 - 4a^2 - 4b^2 - 9b^2 + 4abc + 8abc\)

Combine like terms:

\(2a^2 - 13b^2 + 12abc\)

Answer:

14/3(I believe you mean improper fraction)

Step-by-step explanation:

4 mutiply 3 plus 2

Answer:

The population function is given below as

Step 1:

To figure out the initial price of the item, we will substitute the value of t=0

Hence,

The initial pice of the item is = $800

Step 2:

To determine if the function represents a growth or decay, we will use the relation below

The function for exponential growth is given below as

By comparing coefficients, we can see that

Hence,

The function represents GROWTH

STEP 3:

To figure out the percentage of price change each year, we will use the formula below

To figure out the thenew price, we will substitute the value of t=1

By substituting the values, we will have the percentage to be

Hence,

The percentage = 4.1%

Answer:

y intercept is -3, go up 4 over 1

Step-by-step explanation:

The trigonometric simplified form of sinθ secθ is tanθ.

To write the trigonometric expression sinθ secθ in terms of sine and cosine, we can use the reciprocal identity for secant:

secθ = 1/cosθ

Substituting this into the expression, we have:

sinθ secθ = sinθ (1/cosθ)

Now, to simplify the expression, we can multiply sinθ by 1/cosθ:

sinθ (1/cosθ) = sinθ/cosθ

Using the quotient identity for tangent, we can rewrite sinθ/cosθ as tanθ:

sinθ/cosθ = tanθ

Therefore, the simplified form of sinθ secθ is tanθ.

The complete question is:

Write the trigonometric expression in terms of sine and cosine, and then simplify.

sinθ secθ

To know more about trigonometric:

https://brainly.com/question/29156330

#SPJ4

The confidence interval is given by: [F(b) - F(a)] - z_alpha/2 * sqrt{ [F(b)(1 - F(b)) + F(a)(1 - F(a)) - 2F(a)F(b) + 2F(a)^2] / n } <= theta <= [F(b) - F(a)] + z_alpha/2 * sqrt{ [F(b)(1 - F(b)) + F(a)(1 - F(a)) - 2F(a)F(b) + 2F(a)^2] / n }

The estimated standard error of theta can be found using the following formula:

SE(theta) = sqrt{ [F(b)(1 - F(b)) / n] + [F(a)(1 - F(a)) / n] }

where n is the sample size.

To find an approximate 1 - alpha confidence interval for theta, we first need to find the standard error of the estimator. Let X1, X2, ..., Xn be the random sample. Then, the estimator T(Fn) is given by:

T(Fn) = Fn(b) - Fn(a)

The variance of T(Fn) can be estimated as:

Var(T(Fn)) = Var(Fn(b) - Fn(a)) = Var(Fn(b)) + Var(Fn(a)) - 2Cov(Fn(b), Fn(a))

Using the fact that Fn is a step function with jumps of size 1/n at each observation, we can calculate the variances and covariance as:

Var(Fn(x)) = Fn(x)(1 - Fn(x)) / n

Cov(Fn(b), Fn(a)) = - Fn(a)(F(b) - F(a)) / n

Substituting these into the expression for Var(T(Fn)), we get:

Var(T(Fn)) = [F(b)(1 - F(b)) + F(a)(1 - F(a)) - 2F(a)(F(b) - F(a))] / n

Simplifying this expression, we get:

Var(T(Fn)) = [F(b)(1 - F(b)) + F(a)(1 - F(a)) - 2F(a)F(b) + 2F(a)^2] / n

Now, the standard error of T(Fn) can be calculated as the square root of the variance:

SE(T(Fn)) = sqrt{ [F(b)(1 - F(b)) + F(a)(1 - F(a)) - 2F(a)F(b) + 2F(a)^2] / n }

To construct an approximate 1 - alpha confidence interval for theta, we use the following formula:

T(Fn) +/- z_alpha/2 * SE(T(Fn))

where z_alpha/2 is the (1 - alpha/2)th quantile of the standard normal distribution. Therefore, the confidence interval is given by:

[F(b) - F(a)] - z_alpha/2 * sqrt{ [F(b)(1 - F(b)) + F(a)(1 - F(a)) - 2F(a)F(b) + 2F(a)^2] / n } <= theta <= [F(b) - F(a)] + z_alpha/2 * sqrt{ [F(b)(1 - F(b)) + F(a)(1 - F(a)) - 2F(a)F(b) + 2F(a)^2] / n }

Learn more about estimated standard error of theta

brainly.com/question/31472707

#SPJ11

Answer:

65.94cubic inch

Step-by-step explanation:

volume of cone = 1/3πr²h

=1/3×3.14×3²×7

=3.14×3×7

= 3.14×21

=65.95

unit is inch

then

65.94cubic inch

Answer: not correct reset an-[ERROR]

Step-by-step explanation:

The height of the given triangle is given by option c) h = (x+2)m.

Given the triangle with base b = (x - 2) m and area A = (x² - 4) m²,

we are to determine the height of the triangle using the formula for the area of a triangle.

Area of a triangle = (1/2) × base × height

We have the base and area of the triangle, but the height is unknown.

Therefore, let's find the height of the triangle, h.

A = (1/2) × b × h(x² - 4)

= (1/2) × (x - 2) × h

h = [(x²- 4) / (x - 2)] × 2h

= [(x - 2)(x + 2)] / (x - 2)h

= x + 2

Therefore, the height of the triangle is h = x + 2, which is option C). h = (x + 2) m.

To learn more about Triangle

https://brainly.com/question/8877701

#SPJ11

The comparison between A and B is as follows:A < B.

We are given that:120 % of A is equal to 150 => (120/100)A = 150

Divide both sides by 120/100: A = 150 × 100/120 = 125

And, 105 % of B is equal to 165 => (105/100)B = 165

Divide both sides by 105/100: B = 165 × 100/105 = 157.14

Therefore, A = 125 and B = 157.14

Compare A and B:It can be seen that B is greater than A. Therefore, B > A. Hence, the comparison between A and B is as follows:A < B.

To know more about percentage,

https://brainly.com/question/24877689

#SPJ11

Hello!

The slope of a line is found using the following formula:

\(m=\frac{y2-y1}{x2-x1}\)

\(m=\frac{9-5}{-2-2}\)

\(m=\frac{4}{-4}\\m=-1\)

So the slope is -1.

Hope this helps!

#HaveAnAmazingDay

\(GraceRosalia\)

What is the midnumber between 1 and 7 ?

( 1 + 7 ) ÷ 2 =

8 ÷ 2 = 4

That was the direction now tell me what is the midpoint of point A and point B ?

midpoint of AB = ( A + B ) ÷ 2

m o AB = ( ( 14 , 15 ) + ( - 2 , 9 ) ) ÷ 2

m o AB = ( ( 14 - 2 , 15 + 9 ) ) ÷ 2

m o AB = ( ( 12 , 24 ) ) ÷ 2

m o AB = ( 12 ÷ 2 , 24 ÷ 2 )

m o AB = ( 6 , 12 )

Answer:

0.63

Step-by-step explanation:

0.0063×100

you will move the point two times to the right hand side (backward )

it will be 0.63

Answer:

45/r

Step-by-step explanation:

You're just doing 45 divided by r.

We have the following parameter

Company A

The charges is given by

Company B

The charges is given by

To determine how many miles it will take for the rental cost of company A to exceed B, we will set up the inequality

To find the number of miles, we will make x the subject of the formula

Re-arranging

Therefore, for the rental cost of company A to be better than company B, the number of miles driven in a day must be greater than 600 miles

Answer: 8 8 4

Step-by-step explanation:the first one is 8 then 8 and then 4

The answers will be ;

a) No. of customers , one employee can help at restaurant is 5.

b) No. of customers , one employee can help at grocery store is 12.

c) The grocery rate of customer per employee is 7 more than restaurant's rate.

A graph for restaurant is given and a table for grocery store is given which represents relation of no. of employees per customer.

We have to solve the subparts of the given question.

What will be the rate if there are 12 customers per 2 employee at a shop ?

The rate at the shop will be 12 ÷ 2 or 6 customers per employee.

As per the question ;

Graph for restaurant is given and a table for grocery store is given.

a)

At restaurant ;

For 2 employees , no. of customers = 10

For 4 employees , no. of customers = 20

So ,

With increase of 2 in number of employees , no. of customers increases by 10.

⇒ No. of customers , one employee can help at restaurant is ;

= 10 ÷ 2

= 5 customers

b)

At grocery store ;

For 2 employees , no. of customers = 24

For 4 employees , no. of customers = 48

So ,

With increase of 2 in number of employees , no. of customers increases by 24.

⇒ No. of customers , one employee can help at grocery store is ;

= 24 ÷ 2

= 12 customers

c)

So ,

The restaurant rate of customers per employee = 5 customers/employee

The grocery store rate of customers per employee = 12 customers / employee

And

The grocery rate of customer per employee is more than restaurant rate by ;

= 12 - 5

= 7

Thus , the answers will be ;

a) No. of customers , one employee can help at restaurant is 5.

b) No. of customers , one employee can help at grocery store is 12.

c) The grocery rate of customer per employee is 7 more than restaurant's rate.

To learn more about rate click here ;

https://brainly.ph/question/7825351

#SPJ2

Answer:

The correct y-increment should be 50 instead of 1, and it will solve the problem.

Hence, you are right!

Step-by-step explanation:

Because with Min. x=0 and Max. x=20 and with increment 5 the x values will be:

Now, putting all the x-values in the equation

y=10x+50

For x=0

y=10(0)+50=50

so, for x=0, the value of y=50 i.e. (0, 50)

For x=5

y=10(5)+50=100

so, for x=5, the value of y=100 i.e. (5, 100)

For x=10

y=10(10)+50=150

so, for x=10, the value of y=150 i.e. (10, 150)

For x=15

y=10(15)+50=200

so, for x=15, the value of y=200 i.e. (15, 200)

For x=20

y=10(20)+50=250

so, for x=20, the value of y=250 i.e. (20, 250)

It means, for every x-increment of 5 units, the y-increment goes to 50 units.

Therefore, the correct y-increment should be 50 instead of 1, and it will solve the problem.

Hence, you are right!

The present value method is the more cost-effective remediation method from two options. To determine the present value method for the above option, the given annual O&M needs to be converted into present value.

Given data:

Option 1:Capital cost = $500KAnnual O&M = $15KSalvage value = $50KLife expectancy = 15 yearsDiscount rate = 7%

Option 2:

Capital cost = $350KAnnual O&M = $10KEquipment replacement cost = $20K every 3 yearsSalvage value = $5KLife expectancy = 15 yearsDiscount rate = 7%We can use the below formula for calculating the present value of an annual O&M.P = A [((1 + i)¹ − 1)/i (1 + i)¹]Where,P = Present valueA = Annual O&M ratei = Discount rateOption 1:Present value of Annual O&M:P = A [((1 + i)¹ − 1)/i (1 + i)¹]P = 15,000 [((1 + 0.07)¹⁵ − 1)/0.07 (1 + 0.07)¹⁵]P = 15,000 [7.4693]P = $112,039.50Present value of Salvage value:

P = A [((1 + i)¹ − 1)/i (1 + i)¹]P = 50,000 [((1 + 0.07)¹⁵ − 1)/0.07 (1 + 0.07)¹⁵]P = 50,000 [0.4255]P = $21,276.46Total present value for option 1 = $500K + $112,039.50 - $21,276.46 = $590,763.04

Option 2:

Present value of Annual O&M

:P = A [((1 + i)¹ − 1)/i (1 + i)¹]P = 10,000 [((1 + 0.07)¹⁵ − 1)/0.07 (1 + 0.07)¹⁵]P = 10,000 [5.1395]P = $51,395.26Present value of Salvage value:

P = A [((1 + i)¹ − 1)/i (1 + i)¹]P = 5,000 [((1 + 0.07)¹⁵ − 1)/0.07 (1 + 0.07)¹⁵]P = 5,000 [0.2128]

P = $1,063.91Equipment replacement cost every 3 years needs to be converted into present value:P = A [((1 + i)¹ − 1)/i (1 + i)¹]

P = 20,000 [((1 + 0.07)³ − 1)/0.07 (1 + 0.07)³]P = 20,000 [2.5273]P = $50,546.82

Total present value for option 2 = $350K + $51,395.26 + $50,546.82 - $1,063.91 = $450,877.17Therefore, the more cost-effective remediation method is Option 2, as it has a lower present value of cost of remediation as compared to option 1.

To know more about replacement cost visit :

https://brainly.com/question/15046979

#SPJ11

The supply of average eggs is decreasing at a rate of approximately -550 cartons per week as the price decreases 7 cents per carton per week.

The equation given states that the weekly supply x (in thousands of cartons) of a certain brand of medium-sized eggs is related to the wholesale price p (in dollars/carton) by the following equation: 625p2 − x2 =100. In order to determine the rate at which the supply is changing, we must first calculate the value of p when x = 37,000, which is the number of cartons available at the beginning of the week. To do this, we can solve the equation for p when x = 37,000\(p = (100 + x2)1/2/625\). When x=37,000, p=3.65. Therefore, if the price is falling at the rate of 7¢/carton/week, then the new price p = 3.65 - 0.07 = 3.58. When we plug this new value of p into the supply equation, we get\(x^2\) = 4,225. Taking the square root of both sides gives us x = 65. Therefore, the supply is decreasing at a rate of approximately -550 cartons per week as the price decreases 7 cents per carton per week.

Learn more about average here

https://brainly.com/question/24057012

#SPJ4