pls help, photo below. will give brainliest

Answer:a

Step-by-step explanation:

I don’t know

Answer:

Hi,

Step-by-step explanation:

x>=0

y>=0

x+y-5<=0 line passing through (0,5)  and (5,0) with (0,0) in minus region

2x-y-8<=0 line passing trough (0,-8) and (4,0) with (0,0) in minus region

Answer C

The types of triangles which can be used as a counterexample to the statement " all angles in a triangle are acute " are:

Obtuse

Right

Counter example in math's is defined as an attempt at showing that a mathematical statement is false.

Now, in this case we want to find the counter example that all angles in a triangle are acute angles.

Now, an acute angle is defined as an angle that is less than 90 degrees.

Now, A right angle fits the counter example statement because at least one angle is not less than 90 degrees.

Similarly, an Isosceles triangle does not fit the counter example argument because in an isosceles triangle, two angles are equal and it is possible for three of the angles to be less than 90 degrees.

An obtuse triangle means that one of the angles are greater than 90 degrees and as such this fits our counter example.

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Answer: A cell phone provider offers a plan that costs $30 per month plus $0.10 per text message sent or received.

A comparable plan costs $50 per month but offers unlimited text messaging.

Let the number of massages be x

the total amount costs for plan A = $30 + $0.10x

We will calculate the number of messages at which both the companies charge equal amount.

30 + 0.10x = 50

0.10x = 50 - 30

0.10x = 20

x =

x = 200

At 200 massages both plan would charge equal.

Below 200 massages plan A will charge less but over 200 messages plan B would be better option.

Step-by-step explanation:

Answer:

I think it would be  a-b but it could also be a/b

Step-by-step explanation:

Answer:

3/3, 6/3, 18/6, 32/8, 25/5

Step-by-step explanation:

You can do many different combinations but that is just one combination you can do that equals 1, 2, 3, 4, and 5.

Answer:

B

Step-by-step explanation:

It's B

3^5 = 243

so the 5th root of 243 is 3

(x^7)^(1/5) = x^(7/5)

(y^10)^(1/5) = 7 ^(10/5) = 7^2

z^(21)^(1/5) = z^(21/5)

The option that is least likely to be an application where statistics will be useful is "Choosing the wording of a corporate policy prohibiting smoking".

This is because statistics are generally used to analyze numerical data and make predictions or decisions based on that data.

However, choosing the wording of a corporate policy does not involve numerical data and therefore would not require the use of statistics.

The other options, such as deciding whether offering Rice Krispies improves restaurant sales, predicting whether an airfare is likely to rise or fall, and designing the most desirable features for a ski pass, all involve the analysis of numerical data and therefore would benefit from the use of statistics.

Statistics is the study of the collection, analysis, interpretation, presentation, and organization of data.

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The speed of the train with time is given on a speed time graph

obtained from a past questions website drawn and attached here.

Correct response:

Given:

Length of the train = 220 m

Time at which the train crossed the bridge = 9:30

Length of the bridge = 1,400 m

The plot of the graph of the motion of the train obtained from a past papers website and created with MS Excel is attached;

From the attached graph, we have;

The speed of the train at 9:30 = 126 km/h

Required:

The time it took the train to completely cross the bridge.

Solution:

\(126 \, km/h = 126 \, km/hr \times \dfrac{1,000 \, m}{1 \, km} \times \dfrac{1 \ hr}{3,600 \, s} = \mathbf{ 35 \, m/s}\)

Therefore, the time it took the train to completely cross the bridge is given as follows;

Distance traveled = 1,400 m + 220 m = 1,620 m

The time it took the train to completely cross the bridge is t ≈ 46.29 s

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Answer:             5

Step-by-step explanation: because

Answer:

4. (w² + 6)(w² - 6)

Step-by-step explanation:

w^4 - 36

(w² + 6)(w² - 6)

Answer:

The surface area of a sphere is given by the formula:

A = 4πR^2

Plugging in R = 5.1 cm and π = 3.14, we get:

A = 4(3.14)(5.1)^2

A = 329.81

Rounding to the nearest tenth, we get:

A ≈ 329.8 cm^2

Therefore, the surface area of the sphere is approximately 329.8 cm^2.

x-value that corresponds to the z-score of 2.33 is 81.65.

Mean = 70

Standard deviation = 5

z score = 2.33

Using the z-score formula:

z = (x - mean) / SD

Plug the values:

2.33 = (x-70)/5

    x = 5(2.33) +70

    x = 81.5

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Answer:

\(\frac{3}{2}\)x + 2y - 3.5

Step-by-step explanation:

Because the only operation to be used is addition, the parentheses can be taken away:

(\(\frac{7}{4}\)x - 5) + (2y - 3.5) + (-\(\frac{1}{4}\)x + 5)

\(\frac{7}{4}\)x - 5 + 2y - 3.5 + -\(\frac{1}{4}\)x + 5

Addition of negative numbers is subtraction:

\(\frac{7}{4}\)x - 5 + 2y - 3.5 + -\(\frac{1}{4}\)x + 5

\(\frac{7}{4}\)x - 5 + 2y - 3.5 - \(\frac{1}{4}\)x + 5

Combine like terms to find the furthest simplification of the equation:

\(\frac{7}{4}\)x - 5 + 2y - 3.5 - \(\frac{1}{4}\)x + 5

\(\frac{6}{4}\)x - 5 + 2y - 3.5 + 5

\(\frac{6}{4}\)x + 2y - 3.5

Finally, simplify the coefficient of x:

\(\frac{6}{4}\)x + 2y - 3.5

\(\frac{3}{2}\)x + 2y - 3.5

(\(\frac{7}{4}\)x - 5) + (2y - 3.5) + (-\(\frac{1}{4}\)x + 5) = \(\frac{3}{2}\)x + 2y - 3.5

Answer:

180÷240 × 100%

75% is answer

\(\dfrac{180}{240}\cdot100\%=\dfrac{3}{4}\cdot100\%=3\cdot25\%=75\%\)

The sampling error or sampling variability is the discrepancy between the sample and group norms.

Among the most frequent kinds of sampling mistakes is sampling prejudice. When the sample's participants are not indicative of the general community, it happens. A poll has sampling bias if it only includes respondents from one region of the nation and does not include respondents from the other regions.

For instance, the mother, kids, or the complete family could be the populace in a poll on breakfast cereals. Selection Error: Occurs when respondents self-select their involvement in the poll, suggesting that only the people who are eager are participating.

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Answer:

y = 6x - 20

Step-by-step explanation:

Perpendicular slope = 6

(3, -2)

y - y1 = m(x - x1)

y + 2 = 6(x - 3)

y + 2 = 6x - 18

y = 6x - 20

Answer:

Solution given:

equation of a line is:

y=-⅛x+4.......[1]

Comparing above equation with y=mx+c

we get

slope [m]=-⅛

let slope of another line is M

since the Lines are perpendicular

so m ×M=-1

we get

M=8

again

the another line passes through(x1,y1) (3,-2)

Equation of another line becomes:

(y-y1)=m2(x-x1)

(y+2)=8(x-3)

y+2=8x-24

8x-y=24+2

8x-y=26

\( \frac{8x}{26} - \frac{y}{26} = 1\)

\( \frac{4x}{13} - \frac{y}{26} = 1\)

is a required equation of a line in slope intercept form.

The amount in the account after seven years is approximately $4,582.72.

Compounding refers to the process of earning interest not only on the principal amount of an investment but also on the interest that the investment has previously earned.

The continuous compounding formula is given by:

\(A = Pe^{(rt)}\)

where A is the amount in the account, P is the initial principal, e is the base of the natural logarithm (approximately 2.71828), r is the annual interest rate (as a decimal), and t is the time in years.

In this case, we have P = 2700, r = 0.065, and t = 7. Plugging these values into the formula, we get:

\(A = 2700e^{(0.0657)} \\A= $4,582.72\)

Therefore, the amount in the account after seven years is approximately $4,582.72.

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Answer:

\(A=81\pi $ m^2\)

Step-by-step explanation:

Circumference of the column \(=18\pi $ meters\)

Circumference of a circle\(=2\pi r\)

Therefore:

\(2\pi r =18\pi $ meters\\2r=18\\r=18 \div 2\\$Radius, r=9 meters\)

Area of a Circle \(=\pi r^2\)

Since radius of the cross section of the column =9 meters

Area of the cross section of the column

\(=\pi *9^2\\=81\pi $ m^2\)

Answer:

81pi

Step-by-step explanation:

Answer:

Unit Rate:5 teabags for 1$

teabags for $20: 100

Step-by-step explanation:

make 3/15  a fraction

simplify

multiply 20 times 5

Answer: 10 railroad cars

Step-by-step explanation:

1 feet = 12 inches

Each railroad car is 6 inches in length which is half of 1 feet. If we add another railroad car, then both of them altogether will be 1 feet long.

So, if 1 feet = 2 railroad cars

then, 5 feet = 2 x 5

                    = 10 railroad cars

The correct option is c) Easier interpretation. One of the main advantages of simple models is their ease of interpretation. Simple models tend to have fewer parameters and less complex mathematical equations, making it easier to understand and interpret how the model is making predictions.

This interpretability can be valuable in various domains, such as medicine, finance, or legal systems, where it is important to have transparent and understandable decision-making processes.

Complex models, on the other hand, often involve intricate relationships and numerous parameters, which can make it challenging to comprehend the underlying reasoning behind their predictions. While complex models can sometimes offer higher accuracy or make more detailed predictions, they often sacrifice interpretability in the process.

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From the graph of the function, we have that:

Hence:

Looking at the graph, we get that a function f(x) is decreasing when it is "moving northeast", that is, to the right and up on the graph, meaning that when x increases, y decreases.

Looking at the graph, we get that a function f(x) is decreasing when it is "moving southeast", that is, to the right and down on the graph, meaning that when x increases, y decreases.

Hence:

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Expression 5 + (12.8 ÷ 3.2) represents the phrase 5 + the quotient of 12. 8 and 3. 2 and option (a) is the correct answer.

Expressions refer to a phrase with at least two numbers or variables with any mathematical operations such as addition, exponents, etc. x - 6, 9 + 4y, and 6a are all examples of mathematical expressions.

Equations refer to a sentence when two expressions are equated with the help of '='. x - 6 = 6a is an example of an equation.

In phrase 5+ the quotient of 12. 8 and 3. 2

We divide the phrase into different mathematical operations.

The first operation is of addition with 5, we can write the beginning as 5 + ...

The next operation is division in the phrase the quotient of 12. 8 and 3. 2 which is added to the expression and we get 5 + (12.8 ÷ 3.2)

And we get our answer.

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The complete question might be :

Which expression represents the phrase 5+ the quotient of 12. 8 and 3. 2?

a. 5 + (12.8 ÷ 3.2)

b. 5 - (12.8 + 3.2)

c. 5 + (12.8 * 3.2)

d. none of the above

Answer:

x+2y=-3

Step-by-step explanation:

The values of r are : r = [-1 ± √3]/4 and the function y = e^{rx} satisfies the given differential equation for these values.

Given differential equation is : 2y" + y' - y = 0

We need to find for what values of r, the function y = e^{rx} satisfies the given differential equation.

Given differential equation is : 2y" + y' - y = 0

Let y = e^{rx} , theny' = re^{rx} and y" = r²e^{rx}

Put these values in the given differential equation2y" + y' - y = 02(r²e^{rx}) + r(e^{rx}) - e^{rx} = 0

Divide throughout by e^{rx} to get the characteristic equation2r² + r - 1 = 0

Solving the above quadratic equation using the quadratic formula, we get the roots as

r = [-1 ± √3]/4

If r = [-1 + √3]/4, then

y = e^{rx} = e^{[-1 + √3]x/4} satisfies the given differential equation.

If r = [-1 - √3]/4, then

y = e^{rx} = e^{[-1 - √3]x/4} satisfies the given differential equation.

Hence, the values of r are : r = [-1 ± √3]/4 and the function y = e^{rx} satisfies the given differential equation for these values.

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The expression θ = - 50° ± i · 360°, \(i \in \mathbb{N}_{O}\) represents the family of all angles coterminal with - 50° angle.

Two angles are coterminal if and only if their end have the same direction. Two consecutive coterminal angles have a difference of 360°. Then, we can derive an expression representing the family of all angles coterminal to - 50° angle.

θ = - 50° ± i · 360°, \(i \in \mathbb{N}_{O}\)

The expression θ = - 50° ± i · 360°, \(i \in \mathbb{N}_{O}\) represents the family of all angles coterminal with - 50° angle.

The statement is incomplete and complete form cannot be reconstructed. Thus, we modify the statement to determine the family of angles coterminal to - 50° angle.

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In calculus, 0^0 is an indeterminate form. It is not equal to infinity. But 0x0 is equal to zero.

Some of the indeterminate forms 0/0, 0×∞,∞/∞, ∞ −∞, ∞/0, \(0^{0}\).

An unknown value is referred to as being "indeterminate." Even after inserting the limits, we are still unable to determine the original value, according to the indeterminate form of mathematics. When two functions are considered as a ratio, the indeterminate form frequently appears when both functions go closer to 0 in the limit. The term "indeterminate form 0/0" refers to these circumstances. The indeterminate form can also be created, much as addition, subtraction, multiplication, and exponential operations. If the limiting behavioral of separate components of the provided expression cannot identify the overall limit, a limit is said to be indeterminate.

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Answer:

$3

Step-by-step explanation:

Let the cost of a book and a pen be $b and $p respectively.

3b +2p= 8 -----(1)

5b +3p= 13 -----(2)

(1) ×3:

9b +6p= 24 -----(3)

(2) ×2:

10b +6p= 26 -----(4)

(4) -(3):

10b +6p -(9b +6p)= 26 -24

Expand:

10b +6p -9b -6p= 2

b= 2

Substitute b= 2 into (1):

3(2) +2p=8

6 +2p= 8

2p= 8 -6

2p= 2

p= 2 ÷2

p= 1

Total cost of one book and one pen

= $b +$p

= $2 +$1

= $3

Answer:

You can solve all those problems posted can solve by this method

Step-by-step explanation:

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