Algebra 2, Help ASAP...

The mean of the 10 sales amounts for store A is $40,000

The  least-squares regression line is

y=-3000+1.2x

where

x represents the sales amounts each day at store A

y represents the sales amounts each day at store B

we have

y=$45,000

substitute the value of y in the linear equation and solve for x

45000=-3000+1.2x

1.2x=48000

x=40000

therefore

The mean of the 10 sales amounts for store A is $40,000

Learn more about least-squares here:

https://brainly.com/question/24848242

#SPJ4

Answer:

32

Step-by-step explanation:

2(3)+2((3×4)-(-1))

=6+2(12+1)

=6+26

=32

Answer:

y= -25

Step-by-step explanation:

Hope this helps!!

Answer:

The answer is below

Step-by-step explanation:

How much sleep do high school students get on a typical school night? An interested student designed a survey to find out. To make data collection easier, the student surveyed the first 100

students to arrive at school on a particular morning. These students reported an average of 7.2 hours of sleep on the previous night.

(a) What type of sample did the student obtain?

(b) Explain why this sampling method is biased. Is 7.2 hours probably higher or lower than the true average amount of sleep last night for all students at the school? Why?

Solution:

a) A voluntary response sample is a sample made up of volunteers. It samples more people who have strong opinions and sample people who have less opinion on the survey. It is biased.

Convenience sample is a type of sampling where the group of people are conveniently selected from a population. It is biased.

Since the first 30 students to arrive at school on a particular morning was used, this is convenience sampling since only the first 30 was conveniently selected.

b) This sampling method is biased because the first 30 students are those who would have woken up earlier while those who woke up late would not be sampled.

This means that the 7.2 hours is lower than the true average amount of sleep last night for all students at the school

Answer:

$ 27.60

Step-by-step explanation:

40 mins = 2(20 mins)

2 hrs. = 120 mins = 6(20 mins)

= 2(3.00) + 6(3.60)

= 6.00 + 21.60

= 27.60

The mountain with the steepest slope would be Mountain H, described by the function y = -** + 5.

To determine which mountain has the steepest slope, we need to look at the coefficient of the quadratic term in the function describing each mountain. The higher the coefficient, the steeper the slope.

Among the given options, Mountain H is described by the function y = -** + 5. Since the coefficient of the quadratic term is negative, the parabolic shape opens downwards, indicating a steep slope. Comparing it to the other options where the coefficient is not negative, Mountain H has the steepest slope.

Moving on to the next question:

Approximately 9 out of 100 people are left-handed. To calculate the number of left-handed individuals in a population of 1740 people, we can multiply the percentage by the total population:

Number of left-handed individuals = 9/100 * 1740 = 156.6

Rounding to the nearest whole number, we find that approximately 157 people are likely to be left-handed in a population of 1740 individuals.

As for the third question, it seems that the given system of equations is missing, so it is not possible to determine the x-value for the solution.

Finally, in question 37, the inequality 21 - 5 < -17 can be simplified to 16 < -17, which is not true. Therefore, none of the given answer choices represents the solutions to the inequality.

Learn more about slope here:

https://brainly.com/question/3605446

#SPJ11

Answer:

90 degrees

Step-by-step explanation:

Answer:

you didn't specify much!

So I am saying they are 45° each and that make the sum of both 90°

Step-by-step explanation:

According to the triangle sum theorem, all the angles in a triangle must add up to 180. If one angle is 90° the other two have to add up to 90°,

A) The exponential function that models the mass show many grams remain from a 480-gram sample after t minutes is G(t) = 22(1/2)^(t/5.5)

B) The grams that remain after 2 hours is 51.42 grams.

A substance's half-life is the amount of time needed for half of a radioactive substance to decay. It is a word that is used in nuclear chemistry to describe how quickly unstable atoms undergo radioactive decay into other nuclear species by emitting particles or the amount of time needed for the rate of disintegrations per second of radioactive material in order to reduce by half of its initial value.

Given:

The half-life of goo is 22 minutes/4 = 33.75 minutes

b) A formula for the amount remaining could be ...

G(t) = 22(1/2)^(t/5.5)

c) After 2 hours, the amount remaining is ...

G(120) = 135(1/2)^(47/33.75) ≈ 51.42 . . . grams

To learn more about half-life, visit:

https://brainly.com/question/23464654

#SPJ1

A). After t minutes, the exponential function used to describe the mass remaining from a 480-gram sample is \(G(t) = 22(\frac{1}{2} )^{(t/5.5)}\)

B). 51.42 grammes are still there after two hours.

The amount of time required for a radioactive substance to decay by half is known as its half-life. It is a term used in nuclear chemistry to describe how quickly unstable atoms transform into different nuclear species by emitting particles or how long it takes for the rate of radioactive material's disintegrations per second to fall by half of its initial value.

Given:

The half-life of goo is 22 minutes/4 = 33.75 minutes

b) The amount left could be calculated using the method...

\(G(t) = 22(\frac{1}{2} )^{(t/5.5)}\)

c) The amount left after two hours is...

\(G(120)=135(\frac{1}{2} )^{(\frac{47}{33.5} )}\) ≈ 51.42 . . . grams

To know more aout exponential function, visit:

https://brainly.com/question/2456547

#SPJ1

Answer:

last option; P = 2(8) + 2(12)

Step-by-step explanation:

perimeter is the sum of all sides

in a rectangle, opposite side are equal to you can double the sides that are equal and then add them together

The mean of y1 is 0.5 and the variance of y1 is 1 / 12.

(a) The sampling distribution of y1 is given by the minimum of the random sample, x1, x2, ..., xn. Since the random sample follows a continuous uniform distribution on (0,1), the minimum value, y1, will also follow a continuous uniform distribution on (0,1).

The sampling distribution of yn, the maximum value of the random sample, is also a continuous uniform distribution on (0,1) because each individual value in the random sample is uniformly distributed.

(b) To find the mean of y1, we need to calculate the expected value of the minimum of the random sample. Since y1 follows a continuous uniform distribution on (0,1), the expected value is equal to the average of the minimum and maximum of the distribution, which is (0 + 1) / 2 = 0.5.

To find the variance of y1, we can use the formula for the variance of a continuous uniform distribution, which is (b - a)^2 / 12. In this case, a = 0 and b = 1, so the variance of y1 is (1 - 0)^2 / 12 = 1 / 12.

In summary, the mean of y1 is 0.5 and the variance of y1 is 1 / 12.

To know more about variance, visit:

https://brainly.com/question/14116780

#SPJ11

40 grams of sample would be left 5 grams after 90 years.

Mathematical functions with exponents include exponential functions. f(x) = bˣ, where b > 0 and b 1, is a fundamental exponential function.

Given:

Cesium-137 has a half-life of approximately 30 years.

The amount of 40 g sample would be left after 90 years,

= 40 x (1/2\()^{90/30}\)

= 40 x (1/2)³

= 5

Therefore, 5 grams would be left.

To learn more about the exponential decay;

https://brainly.com/question/14344314

#SPJ1

The conversion of the units is 7 1/2 cup is 112.5 tbsp

From the question, we have the following parameters that can be used in our computation:

convert 7 1/2 cup to tbsp

This can be represented using the following equation

7 1/2 cup = x tbsp

Express as decimal

x tbsp = 7.5 cups

1 cup = 16 tablespoons

So, we have the following representation

x tbsp = 7.5 * 15 tablespoons

Evaluate

x tbsp = 112.5 tablespoons

Hence, the conversion is 112.5 tablespoons

Read more about metric units at

https://brainly.com/question/18037963

#SPJ1

Answer:

Its correct answer is sin65°/125.

The point on the line 2x + y = 5 closest to the point (-1, 2) is (1, 3).

To find the point on the line 2x + y = 5 closest to the point (-1, 2), follow these steps:

1. Write the given line equation in slope-intercept form: y = -2x + 5
2. Find the slope (m) of the line: m = -2
3. Find the slope of the perpendicular line: m_perp = 1/2 (since the product of slopes of perpendicular lines equals -1)
4. Write the equation of the line passing through (-1, 2) and perpendicular to the given line: y - 2 = 1/2(x + 1)
5. Solve the system of equations to find the point of intersection:
  y = -2x + 5
  y - 2 = 1/2(x + 1)
6. Substitute the first equation into the second: -2x + 5 - 2 = 1/2(x + 1)
7. Solve for x: -4x + 3 = x + 1, x = 1
8. Substitute the value of x into the first equation: y = -2(1) + 5, y = 3
9. The point of intersection is (1, 3), which is the point on the line 2x + y = 5 closest to the point (-1, 2).

To know more about slope-intercept form click on below link:

https://brainly.com/question/29146348#

#SPJ11

Answer:

\(P(X=2) =0.3906\)

Step-by-step explanation:

Proportion of students using the app, p = 63/100 = 0.63

Proportion of students not using the app, q = 1 - 0.63 = 0.37

Sample size, n = 2

Probability that the two students are using the app.

\(P(X = r) = nCr p^{n} q^{n-r} \\P(X = 2) = 2C2 *0.63^{2} *0.37^{2-2}\\P(X = 2) = 2C2 *0.63^{2} *0.37^{0}\\P(X=2) = 0.63^{2} \\P(X=2) =0.3906\)

The equation for traveling x miles in the cab can be written as:

Cost = $0.60 + $0.14 * x. The cab charges $0.88 for a ride of 2 miles. And the cab charges $1.72 for a trip of 8 miles.

a. The equation for traveling x miles in the cab can be written as:

Cost = $0.60 + $0.14 * x

b. To find the number of miles for a cab ride that costs $0.88, we can set up the equation:

$0.88 = $0.60 + $0.14 * x

Subtracting $0.60 from both sides, we get:

$0.88 - $0.60 = $0.14 * x

$0.28 = $0.14 * x

Dividing both sides by $0.14, we find:

x = $0.28 / $0.14

x = 2 miles

Therefore, the cab charges $0.88 for a ride of 2 miles.

c. To calculate the cost of a trip of 8 miles, we can substitute x = 8 into the equation:

Cost = $0.60 + $0.14 * 8

Cost = $0.60 + $1.12

Cost = $1.72

Therefore, the cab charges $1.72 for a trip of 8 miles.

For more such questions on charges , Visit:

https://brainly.com/question/30478263

#SPJ11

Answer:

-½ + (root2 / 2) i + root½ i

Step-by-step explanation:

\( \frac{a}{b} - \frac{c}{d} = \frac{ad - cb}{bd} \)

I used this formula to do it but let me know if it's enough or you have to simplify it further

Answer:

45

Step-by-step explanation:

The question asks which combined solid the person selected to make their own models. Without additional context or information, it is difficult to provide a specific answer.

Platonic solids are regular, convex polyhedra that have identical faces and vertices. There are five Platonic solids: tetrahedron, cube, octahedron, dodecahedron, and icosahedron. A combined solid is formed by joining two or more Platonic solids together. Some common combined solids that can be made from Platonic solids include:

Cuboctahedron: This is a combination of a cube and an octahedron. It has 8 triangular faces and 6 square faces.

Icosidodecahedron: This is a combination of an icosahedron and a dodecahedron. It has 20 triangular faces and 12 pentagonal faces.

Rhombicuboctahedron: This is a combination of a cube and an octahedron, with each face being a rhombus. It has 8 triangular faces and 18 square faces.

Truncated octahedron: This is formed by truncating the corners of an octahedron. It has 8 hexagonal faces and 6 square faces.

Without additional context or information about the person's preferences or intended use for the models, it is impossible to determine which combined solid they selected.

Learn more about Platonic solids here: brainly.com/question/16936647.

#SPJ11

Based on the information, we can infer that the whole number equivalent to this fraction is 285.

To clear the fraction and obtain an integer we must perform all the mathematical operations that are in the fraction, in this case it is a division and seven multiplications. Here we show you the result:

As evidenced in the procedure, the multiplications were cleared and later the fraction was divided. In this case the result would be the integer 285.

Note: This question is incomplete. Here is the complete information:

How to express this fraction in whole numbers?

Learn more about fractions at: https://brainly.com/question/10354322

#SPJ1

Answer:

I'm not so sure but i guess it's option D y=5x-3

the question said that the number of box of nails are purchased depending on how many houses they planned to build. so for knowing the boxes of nails they need to purchase they need to subtract the boxes which were left and the boxes we need now

Answer:

Step-by-step explanation:

To find the inverse of a function, we need to switch the variables x and y and solve for the new variable.

Given f(x) = x + 2/3, we can write the inverse as f^-1(y) = x.

So we will replace y with 4 in the inverse function f^-1(y) = x and solve for x.

f^-1(4) = x

x + 2/3 = 4

x = 4 - 2/3

x = 8/3

Therefore, f^-1(4) = 8/3

US$ the tourist received finally is US$985.

BD$2000 is there.

BD$1 = US$0.50

Bank charged a commission of 1.5%.

Solution:

For one BD i.e., BD$1 he gets US$0.50.

It is half the value of BD$.

By cross multiplication technique, you can find this.

Then for,

BD$2000 he will get US$ 1000.

Bank charges =  1.5%.

That is,

1.5/100*1000 = $15

US$ the tourist received finally = 1000-15

= $985

US$ the tourist received finally is US$985.

To learn more about conversion sums, refer

https://brainly.com/question/23718955

#SPJ13

Answer:

The numbers are 10 and 21.

Step-by-step explanation:

x + y = 31

xy = 210

x = 31 - y

(31 - y)y = 210

31y - y² = 210

y² - 31y + 210 = 0

(y - 21)(y - 10) = 0

y - 21 = 0  or  y - 10 = 0

y = 21  or  y = 10

The two real numbers are 10 and 21.

Quadratic Equations are algebraic expressions of degree 2 in one variable and are of the form ax² + bx + c = 0.

In simpler terms, a quadratic equation is be defined as a polynomial equation of degree 2.

Given that, there are two real numbers with a sum of 31 and a product of 210.

We need to find their values using the concept of quadratic equation,

So, according to the question,

x + y = 31 (eq 1)

xy = 210 (eq 2)

x = 31 - y

(31 - y) y = 210

31y - y² = 210

y² - 31y + 210 = 0

(y - 21) (y - 10) = 0

y - 21 = 0 or y - 10 = 0

y = 21 or y = 10

Hence, the two real numbers are 10 and 21.

Learn more about quadratic equation click;

https://brainly.com/question/30098550

#SPJ2

A vector is a mathematical term that describes a specific type of object. In particular, a vector in R4 is a four-dimensional vector that has four components, which can be thought of as coordinates in a four-dimensional space. In this question, we will make up a vector y in R4 whose entries add up to 1. We will then compute p[infinity]y, and compare our result to p[infinity]x0.

However, if y is not a uniform distribution, then the long-term distribution will depend on the specific transition matrix P. For example, if the transition matrix P has an absorbing state, meaning that once the chain enters that state it will never leave, then the long-term distribution will be concentrated on that state.

In conclusion, the initial distribution vector y of the electorate can have a significant effect on the distribution in the long term, depending on the transition matrix P. If y is uniform, then the long-term distribution will also be uniform, regardless of P. Otherwise, the long-term distribution will depend on the specific P, and may be influenced by factors such as absorbing states or stable distributions.

To know more about mathematical visit:

https://brainly.com/question/27235369

#SPJ11

The exact value  of \(sin 2x\) is \(4√5/9.\)

Given that \(sec x = 3/2 and csc y = 3\)where x and y are in the 2x = 2 sin x quadrant, we need to find the exact value of sin 2x.

In the first quadrant, we have the following values of the trigonometric ratios:\(cos x = 2/3 and sin y = 3/5\)

Also, we know that sin \(2x = 2 sin x cos x.\)

Now, we need to find sin x.

Having sec x = 3/2, we can use the Pythagorean identity

\(^2x + 1 = sec^2xtan^2x + 1 = (3/2)^2tan^2x + 1 = 9/4tan^2x = 9/4 - 1 = 5/4tan x = ± √(5/4) = ± √5/2\)

As x is in the first quadrant, it lies between 0° and 90°.

Therefore, x cannot be negative.

Hence ,\(tan x = √5/2sin x = tan x cos x = √5/2 * 2/3 = √5/3\)

Now, we can find sin 2x by using the value of sin x and cos x derived above sin \(2x = 2 sin x cos xsin 2x = 2 (√5/3) (2/3)sin 2x = 4√5/9\)

Therefore, the exact value  of sin 2x is 4√5/9.

To know more about trigonometric visit :

https://brainly.com/question/29156330

#SPJ11

Answer:

66 years

Step-by-step explanation:

1) Convert 1.4426 * 10^4 into a number....

     = 14426

2) Divide

14426 / 218.58  

= 65.9987190045

About 66 years

That's all you write cause they asked u in years, no month or other stuff :)

Answer:

Approximately 66 years

Step-by-step explanation:

1.4426×\(10^{4}\) mm is equal to 14,426mm

14,426mm÷218.58=65.998...≅66

A confidence interval for the true population correlation coefficient (p) is (0.62, 0.98). in this case,  we would conclude that there is a strong positive correlation between the two variables being studied.

A confidence interval for the population correlation coefficient (p) is a range of values that is likely to include the true value of p. In this case, the interval is (0.62, 0.98), which suggests that the true value of the correlation coefficient is likely to fall within this range with a certain level of confidence. A positive correlation means that as one variable increases, the other variable also tends to increase.

Since the interval ranges from 0.62 to 0.98, which is close to 1, we can conclude that there is a strong positive correlation between the two variables being studied. This indicates that as one variable increases, the other variable is likely to increase as well.

You can learn more about correlation coefficient at

https://brainly.com/question/4219149

#SPJ11

Answer:

The answer is

Step-by-step explanation:

Equation of a line is y = mx + c

Where m is the slope

c is the y intercept

From the question the y intercept is 3

and the slope is 2

Substituting the values into the above equation

We have

Hope this helps you

The equation of a line that passes through \((0,3)\) and a slope \(2\) is \(y=2x+3\).

The equation of a line that passes through a point \((x_1, y_1)\) and slope \(m\) is:

\((y-y_1)=m(x-x_1)\)

Here, the point is \((0,3)\) and the \(slope\) is \(2\).

So, \(x_1=0, y_1=3\) and \(m=2\).

So, the equation of the line is

\((y-y_1)=m(x-x_1)\)

\((y-3)=2(x-0)\)

\(y-3=2x-0\)

\(y=2x+3\)

So, option B is correct.

Learn more about equation of a line here:

https://brainly.com/question/19456910?referrer=searchResults