1. Solve the system by the elimination method.
3x−5y=4
−9x+3y=−24
A. (2, −2)
B. (3, 1)
C. (1, −1)
D. (8, 4)
2. Manny says he should multiply the first equation in the system of equations below by 3 and the second equation by 2, then add to eliminate x. Is there a more efficient way to solve this system? Explain your answer.
−2x+y=15
3x+4y=−12
A. No, there isn't a more efficient way to solve this system.
B. Yes, a more efficient way is to multiply the first equation by −4
add to eliminate y, then solve for x.
C. Yes, a more efficient way is to multiply the first equation by −4
add to eliminate x, then solve for y.
D. Yes, a more efficient way is to multiply the first equation by 4
add to eliminate y, then solve for x.

The range of the function f (x) = - 3x² + 5 is,

⇒ (- ∞, 5]

⇒ All real numbers less than or equal to 5

An algebraic equation with the second degree of the variable is called an Quadratic equation.

Given that;

The equation is,

⇒ f (x) = - 3x² + 5

Now, We an draw the graph of function f (x) = - 3x² + 5.

In graph the range is the defined as cover by up and down.

Hence, The range of the function f (x) = - 3x² + 5 is,

⇒ (- ∞, 5]

⇒ All real numbers less than or equal to 5

Learn more about the quadratic equation visit:

brainly.com/question/1214333

#SPJ1

Answer:

6 hours

Step-by-step explanation:

They meet at distance d from their starting point.

Juan walks at 4 mph for time t.

Cathy jogs at 5 mph for time t - 1.5 since she starts 1.5 hour later.

speed = distance/time

distance = speed × time

Juan

d = 4t

Cathy

d = 5(t - 1.5)

4t = 5t - 7.5

t = 7.5

They meet 6.5 hours after Juan started walking.

Cathy jogged for 1.5 hours less than Juan walked.

7.5 hours - 1.5 hours = 6 hours

Answer: 6 hours

Liliana's next step is to find the area of each of the two trapezoids.

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

Given that she has broken the polygon into two trapezoids, the next step ti so calculate the area of each trapezoid

This is done using

Area = 1/2 * (sum of parallel sides) * height

Read mroe about area at

https://brainly.com/question/22972014

#SPJ1

Answer:the fitness app will have 1,280,000 downloads after 10 months.

Step-by-step explanation:

To find the number of downloads after 10 months, we need to calculate the number of downloads after each month and add them up. Here's the formula to calculate the number of downloads after n months:

Number of downloads after n months = 1,250 * 2^n

Substituting n=10 in the formula, we get:

Number of downloads after 10 months = 1,250 * 2^10 = 1,250 * 1024 = 1,280,000

So, the fitness app will have 1,280,000 downloads after 10 months.

Answer:

2488.46 ft³

Step-by-step explanation:

the composite solid consists of;

cone and cylinder

volume of a cone=⅓πrh

volume of a cylinder=πr²h

then sum up the volume

⅓×3.142×8×9= 75.408 ft³

3.142×8×8×12=2413.056

2413.056+75.408=

2488.46 ft³

Answer:all you do is multiply 26.99*1.42

this equals 38.33 dollars

35.50 is less than 38.33

thus, USA is cheaper than England.

Step-by-step explanation:

The equivalent exponential function is ( 8 ) ^ ( 3x/4 ).

option A.

The equivalent of the exponential function is calculated by applying the following formula.

Generally, for an exponential function of (√a)³ = ( a ) ^ (2/3)

The given exponential function = ∛ (8) ^ (1/4)× , the equivalent function is determined as;

∛ (8) ^ (1/4)× = ( 8 ) ^ ( 1 / 4 ) ( 3x )

= ( 8 ) ^ ( 3x/4 )

Thus, the equivalent exponential function is determined by applying exponential rules.

Learn more about exponential function here: https://brainly.com/question/2456547

#SPJ1

the answer is DDT

your welcome and have a great rest of your day

There is a 0.00108 probability of choosing 8 candidates the option b from given choices.

The discrete probability distribution known as the binomial distribution only offers Success or Failure as the only two possible outcomes for an experiment. In a binomial distribution, the two parameters n and p are employed. The variables "n" and "p" indicate how many times the experiment is conducted and the probability of each possible outcome, respectively. Let X be the interesting random variable; in this instance, we can suppose that it follows the following distribution: x- Binomial (n = 20; p = 0.74).

For the Binomial distribution, the probability mass function is given as

: p(x) = ( ⁿc ₋ₓ)ˣ (1 - p)ⁿ⁻ˣ.

where ( ⁿc ₋ₓ)ˣ refers to a combination. In this instance, we want this probability.

P ( x = 8 ) = (²⁰c₋₈) × (0.74)⁸ (1-0.74)²⁰⁻⁸ = 0.00108.

The probability of choosing 8 young adults is 0.00108.

To learn more about binomial distribution click here

brainly.com/question/29137961

#SPJ4  

complete Question

according to a 2018 survey, 74 percent of employed young adults expect to bring work on a vacation trip. a random sample of 20 employed young adults will be selected. what is the probability that 8 of the selected young adults will expect to bring work on a vacation trip?

a) (²⁰c₈)(0.26)⁸(0.74)¹²⁻²⁰ choose 8, times 0.26 to the eighth power, times 0.74 to the twelfth power

b) (²⁰c₈)(0.74)⁸(1-0.74)²⁰⁻⁸ choose 8, times 0.74 to the eighth power, times 0.26 to the twelfth power

c) (¹²c₈)(0.26)⁸(0.74)¹²⁻¹² choose 8, times 0.26 to the eighth power, times 0.74 to the twelfth power

d) (¹²c₈)(0.74)⁸(0.26)¹²⁻¹² choose 8, times 0.74 to the eighth power, times 0.26 to the twelfth power (288)(0.26)8(0.74)12

The transformation rule descriptions are;

1) Reflection over the x-axis

(x, y) → (x, -y)

2) Reflection over the x-axis

(x, y) → (x, -y)

3) Reflection over the y-axis

(x, y) → (-x, y)

4) Reflection over the x-axis and then a reflection over the y-axis:

(x, y) → (-x, -y)

1) We clearly see that the transformed image is an exact mirror image of the original image which is a rhombus. Thus, the transformation is a reflection over the x-axis.

This is expressed as (x, y) → (x, -y)

2) We clearly see that the transformed image is an exact mirror image of the original image which is a triangle. Thus, the transformation is a reflection over the x-axis.

This is expressed as (x, y) → (x, -y)

3) We clearly see that the transformed image is an exact mirror image of the original image which is a rectangle. Thus, the transformation is a reflection over the y-axis.

This is expressed as (x, y) → (-x, y)

4) We clearly see that the transformed image is an exact mirror image of the original image which is a pentagon. Thus, the transformation is a reflection over the x-axis and then a reflection over the y-axis.

This is expressed as (x, y) → (-x, -y)

Read more about Transformation rule at; https://brainly.com/question/8987411

#SPJ1

The slopes of the secant line corresponding to the given intervals of t is 132.1, 116.3, 91.4 and 44.2 steps per minute.

To find the slope of a secant line between two points, we need to divide the difference in the y-values (number of steps) by the difference in the x-values (time in minutes).

For the interval from t = 0 to t = 10 minutes:

y1 = 3,288 steps

y2 = 4,609 steps

x1 = 0 minutes

x2 = 10 minutes

The slope of the secant line is:

(y2 - y1) / (x2 - x1) = (4,609 - 3,288) / (10 - 0)

= 1,321 / 10

= 132.1 steps per minute

For the interval from t = 10 to t = 20 minutes:

y1 = 4,609 steps

y2 = 5,772 steps

x1 = 10 minutes

x2 = 20 minutes

The slope of the secant line is:

(y2 - y1) / (x2 - x1) = (5,772 - 4,609) / (20 - 10)

= 1,163 / 10

= 116.3 steps per minute

Similarly, for interval t = 20 to t = 30 minutes

Slope = (6,686 - 5,772)/ (30 - 20) = 91.4 steps per minute

for interval t = 30 to t = 40 minutes

Slope = (7,128 - 6,686)/ (40 - 30) = 44.2 steps per minute

To know more on secant line

https://brainly.com/question/30162655

#SPJ4

The pressure of the gas at the volume of 900 litres will be 32 kilopascals.

Boyle’s law states that the pressure of compressed gas is inversely proportional to its volume. It means that the product of the pressure and volume of the gas is constant when the temperature of the gas is constant.

Given that the pressure of a certain sample of gas is 16 kilopascals when its volume is 1,800 litres.

The pressure of the gas at the volume of 900 litres will be calculated as;-

P₁V₁ = P₂V₂

( 16 x 1800 ) = P₂ x 900

P₂ = ( 16 x 1800 ) / 900

P₂ = 16 x 2

P₂ = 32 Kilopascal

Hence, the pressure will be 32 kilopascals.

To know more about Boyle's law follow

https://brainly.com/question/1696010

#SPJ1

There was more glass used to make the cylinder paperweight, and there was 16π cm³ more glass was used.

Volume is defined as the space occupied within the boundaries of an object in three-dimensional space.

Given that, Two solid glass paperweights in the shape of a solid cone having height 6 cm and radius 4 cm, and a solid cylinder with height 3 cm and diameter of 8 cm, we need to find the volume of glass used to make each paperweight,

Volume of cylinder = π×radius²×height

Volume of cone = π×radius²×height / 3

Therefore,

Volume of the cylinder =

π × 4² × 3

= 48π cm³

Volume of cone = π × 4² × 6 / 3

= 96π / 3

= 32π cm³

Therefore, the volume of glass used in the cone paperweight is 32π cm³, and the volume of glass used in the cylinder paperweight is 48π cm³

And, 48π-32π = 16π

Since, the volume of cylindrical paperweight is more than conical paperweight, therefore, there was more glass used to make the cylinder paperweight, and there was 16π cm³ more glass was used.

Hence, there was more glass used to make the cylinder paperweight, and there was 16π cm³ more glass was used.

Learn more about volumes, click;

https://brainly.com/question/1578538

#SPJ1

The question was incomplete, so I solved for,

"Two solid glass paperweights are shown at the right. What is the volume of glass used to make each paperweight? Write the volumes in terms of pi"

In the example, was more glass used to make the cone paperweight or the cylinder paperweight? How much more?

Answer:

≈ 7.8598

Step-by-step explanation:

Let's round pi to 3.14159. First, we multiply 3.14159 by 4.5, which is around 14.13716. Then, we divide 3.14159 by 0.5, which is around 6.28318. So, 14.13716 - 6.28318 = 7.8598

Based on the information in the Venn diagram, we can infer that the table would be completed with the following data from left to right and from top to bottom: 6, 30, 36, 41, 22, 63, 47, 52, 99.

To find the values that complete the table, we must analyze the sales diagram and the data it contains. In this case, it is showing two sets, one referenced with the word fish and the other with the word bird, each of them has different values and there is a set that relates them. Additionally, on the outside of these sets there is a value for a category that is not related to these sets.

In accordance with the above, we only have to look at the values and complete the table. Additionally, to find the totals we must add the values of each row or column.

Learn more about graphics in: https://brainly.com/question/14191900

#SPJ1

Answer:

11.9

Step-by-step explanation:

Sin 58/ BC = Sin 90/ 14

BC = sin 58 × 14 / sin 90

BC = 11.9cm

The graph of the inequality y ≤ 5x - 3 is given below.

In mathematics, "inequality" refers to a relationship between two expressions or values that are not equal to each other. To solve the inequality, you may multiply or divide each side by the same positive number, add the same amount to each side, take the same amount away from each side, and more. You must flip the inequality sign if you multiply or divide either side by a negative number.

Given:

An inequality:

y ≤ 5x - 3.

The intercepts are (0.6, 0) and (0, -3)

The graph of the inequality is given in the attached image.

Therefore, the graph is given.

To learn more about the inequality;

brainly.com/question/28823603

#SPJ1

Answer:

80.89 metres

Step-by-step explanation:

82.2 - 1.31 = 80.89

Answer:

80.89m

Step-by-step explanation:

Just calculate:

82.2 - 1.31 = 80.89m

If the publisher changes from a sample size of 100 to a sample size of 1000, the precision of the estimate will be more accurate and the publisher will have more confidence in the results.

Increasing the sample size from 100 to 1000 will result in a more precise estimate of the proportion of children who like the book. The larger sample size will lead to a narrower sampling distribution, meaning that the estimates of the proportion will be more tightly clustered around the true value. This increased precision can provide the publisher with more confidence in the results and a better understanding of the opinions of children on the new book.

Read more about Sample classification:

brainly.com/question/24466382

#SPJ4

A sample size of 384 high school students would be needed to estimate the mean change in SAT score to within 2 points with 95% confidence.

To calculate the sample size needed to estimate the mean change in SAT score to within 2 points with 95% confidence, we need to use the formula for sample size calculation:

n = (z^2 * σ^2) / (E^2)

where n is the sample size, z is the confidence level, σ is the standard deviation, and E is the margin of error.

In this case, our confidence level is 95%, so z = 1.96. The standard deviation of the score increase is 50 points and the margin of error is 2 points. So, plugging these values into the equation, we get:

n = (1.96^2 * 50^2) / (2^2)

Solving, we get n = 384. Therefore, a sample size of 384 high school students would be needed to estimate the mean change in SAT score to within 2 points with 95% confidence.

Learn more about standard deviation here:

https://brainly.com/question/23907081

#SPJ4

The angle in degrees south of east, is a line connecting your starting point to your final position is 144.46°.

The displacement vector represents the displaced distance along with the direction of displacement. The initial point of the displacement is represented by a tail of a vector arrow whereas, the final point is represented by the arrowhead. Assume i walk 17.5 m straight west and then 24.0 m straight north. Let vectors A and B denotes the displacement. The total displacement, R is determined by adding both vector and direction is θ. So, [tex] \vec R = \vec A + \vec B[/tex]

[tex] \vec R = −17.5 \hat{i} + 24 \hat j[/tex]

The magnitude of the displacement vector is denoted by,

[tex]| \vec R |= \sqrt{{ (- 17.5)}^{2} + {24}^{2} } = \sqrt{882.25} = 29.70 \\ [/tex]

The angle of displacement is given by,

[tex]θ={tan}^{- 1} ( \frac{24}{ - 17.5}) [/tex]

From the above diagram, the displacement is at − 54.46° , which is in the west-north direction in the compass. Let the south of east angle be φ. Now, the angle south of east is φ = 180° - 90° - θ Hence required angle is 90° + 54.46° = 144.46°.

To learn more about Displacement vector, refer:

https://brainly.com/question/12006588

#SPJ4

Complete question:

Suppose you walk 17.5 m straight west and then 24.0 m straight north. At what angle, in degrees south of east, is a line connecting your starting point to your final.

The sampling distribution of the A tile in this population is 0.04.

The sampling distribution is a probability distribution of an observed result from a sample that is used to draw inferences about a population. In the game of Scrabble, the sampling distribution is used to draw inferences about the population of 100 tiles. Specifically, the sampling distribution explains the likelihood of a certain tile being drawn. For example, if the population contains 4 A tiles and 96 other tiles, then the probability of drawing an A tile is 4/100 or 0.04. This probability is the sampling distribution of the A tile in the population of 100 tiles. The sampling distribution can also be represented by the formula P(X=x)=nx/n, where n is the total number of tiles and x is the number of tiles of a certain type. Therefore, in the example above, P(X=A)=4/100=0.04. Thus, the sampling distribution of the A tile in this population is 0.04.

Learn more about sampling distribution here:

https://brainly.com/question/30007465

#SPJ4

On solving the provided question, we can say that we have been provided with, by Simple Interest SI = PRT/100  =>rate = 15% per yr

Simple interest is calculated by dividing the principal by the interest rate, the passage of time, and other elements. The formula used in marketing is simple return = principal + interest + hours. Using this approach, interest may be calculated most easily. The most common way to calculate interest is as a percentage of the principal balance. If he borrows $100 from a friend and agrees to pay it back with 5% interest, for instance, he will only pay his proportion of the 100% interest. $100 (0.05) = $5. You must pay interest when you borrow money and charge interest when you lend it. The majority of the time, interest is calculated as an annual percentage of the loan balance. This proportion is referred to as the loan's interest rate.

we have been provided with,

Interest = 6240

principal = 5200

time = 8 yrs

so, by SI = PRT/100

R = SI * 100/PT = 15%

rate = 15% per yr

To know more about interest visit:

https://brainly.com/question/28792777

#SPJ1

Rearrange first

9,13,37,39

median=13+37÷2

=25

median is 25

mean=9+13+37+39÷4

=98÷4=24.5

Mean=24.5

Symbolic models are those that are based on mathematical formulas.

The goal of symbolic modelling is to help clients become more aware of their own "symbolic domain of experience," allowing them to create their own "metaphor landscape" and explore internal metaphors, which are believed by conceptual metaphor theory to influence behaviour.

What benefits do symbolic models offer?

One of the most significant and defining technologies of next-generation modelling methodologies is swiftly emerging as symbolic computation. It allows the freedom to easily create model equations, manage models more effectively, and reach the best outcomes more quickly.

Describe domain through an example.

the domain name example.com might be connected to the address 198.102. 434.8.

To know more about symbolic modelling visit:

https://brainly.com/question/9002072

#SPJ4

Each single entertainment segment is 4.5 minutes.

Out of the 20 minute show there are two blocks of time that are ads. The ads are each 13/4 minutes long.

13/4 = 13 ÷ 4 = 3.25

minutes.

Let's take away the time used for ads from the 20 minute total.

20 - 3.25 - 3.25

= 13.5

Without ads the show's actual runtime is 13.5 minutes.

Now we'll divide that 13.5 into three equal parts.

13.5 ÷ 3 = 4.5

Each of the three equal entertainment segments is 4.5 minutes long.

Learn more about word problem at:

Let's first find the total number of possible 6-number combinations from the set of integers 1 to 900, inclusive. This is simply 900^6.

Next, we need to find the number of 6-number combinations that leave a remainder of 4 when their product is divided by 30.

Since the remainder of a product of integers is equal to the product of the remainders of each integer when divided by the same number, we only need to focus on finding the number of combinations of integers from 1 to 900, inclusive, that leaves a remainder of 4 when divided by 30.

We can find this number by dividing 900 by 30 and rounding up to the nearest integer (since we're choosing with replacement, some numbers may be repeated), which gives us 30. So there are 30 possible integers that leave a remainder of 4 when divided by 30.

Since we're choosing 6 numbers from these 30 integers, the number of 6-number combinations that leave a remainder of 4 when their product is divided by 30 is simply 30^6.

Finally, to find the probability of this happening, we divide the number of favorable outcomes by the total number of possible outcomes, and express the answer as a percent:

(30^6) / (900^6) * 100 = 0.000008 * 100 = 0.0080 = 0.80% (rounded to the nearest thousandth)

So the answer is 0.80%

You can read more about probability at https://brainly.com/question/24756209

#SPJ4

The volume of the remaining portion of the sphere is 2.096 cubic units.

Let's take the volume of the remaining portion of the sphere = V

The volume of the sphere = [tex]\frac{4}{3}[/tex] * π * [tex]r^3[/tex]

The volume of the sphere with radius 1  = 4/3 * π

The volume of the cylinder = π * [tex]r^2[/tex] * h

The volume of the cylinder with height 2 and radius 1 = π * [tex]r^2[/tex] * h = 2 * π.

The difference between the volume of the sphere and the cylinder is

V = 4/3 * π - 2 * π = 4/3 * π - 2 * π = 2/3 * π.

By taking π = 3.14

V = [tex]\frac{2}{3}[/tex] * 3.14

V= 2.096.

So, the volume of the remaining portion of the sphere is 2.096 cubic units.

To learn more about the volume of the sphere:

https://brainly.com/question/22807400

#SPJ4

Depending on the coordinate system used, a vector's magnitude can vary. A vector may be enhanced by the addition of a scalar. When one of a vector's components is nonzero, the vector can have a magnitude of zero.

What is magnitude of a vector ?

A vector's magnitude, represented by the symbol |v|, is used to determine a vector's length. The distance between the vector's beginning point and endpoint is what this amount essentially represents.

What does the vector coordinate system mean?

An ordered list of integers (a tuple) that represents a vector in terms of a specific ordered basis is known as a coordinate vector in the language of linear algebra.

                             The coordinates (5, 2, 1) in a three-dimensional Cartesian coordinate system with the axes as its basis serve as an accessible example.

Learn more about magnitude of a vector

brainly.com/question/27888052

#SPJ4