find a unit normal vector to the surface f ( x , y , z ) = 0 f(x,y,z)=0 at the point p ( 2 , 5 , − 27 ) p(2,5,-27) for the function f ( x , y , z ) = ln ( x − 5 y − z )

The length of the base is 5 feet

A quadratic equation is a second-degree polynomial equation that can be written in the form "ax² + bx + c = 0", where "x" is the variable, and "a", "b", and "c" are constants. The coefficient "a" cannot be zero, as this would result in a linear equation.

The area of a triangle is gotten from;

A = 1/2bh

2A = bh

A = 35 square feet

70= b (2b +4)

70 = 2b^2 + 4b

2b^2 + 4b - 70 = 0

b = 5 or -7

Since length can not be negative;

b = 5 feet

length = 2(5) + 4 = 14 feet

Learn more about triangle:https://brainly.com/question/2773823

#SPJ1

The point of inflection is at x = 8.19

To discuss the extrema of the function[tex]C(x) = 0.0049x^3 -0.1206x^2 + 0.839x + 48.72[/tex],

we will take the first and second derivatives with respect to x:

[tex]C'(x) = 0.0147x^2 - 0.2412x + 0.839[/tex]

[tex]C''(x) = 0.0294x – 0.2412[/tex]

Setting C'(x) = 0 to find critical points:

[tex]0.0147x^2 - 0.2412x + 0.839 = 0[/tex]

Using the quadratic formula, we can solve for x:

[tex]x=\frac{ [0.2412 ± \sqrt{(0.2412)^{2}-4(0.0147)(0.839) }] }{2(0.147)}[/tex]

x ≈ 4.27, 11.50

We also note that C''(x) > 0 for all x, which means that the function is concave up everywhere.

Therefore, we have two critical points: x = 4.27 and x = 11.50. To determine whether these are maxima or minima, we can use the second derivative test.

C''(4.27) ≈ 0.356 > 0, so x = 4.27 is a relative minimum.

C''(11.50) ≈ 0.323 > 0, so x = 11.50 is a relative minimum.

Since the function is concave up everywhere, these relative minima are also absolute minima.

To find the point of inflection, we set C''(x) = 0:

0.0294x – 0.2412 = 0

x ≈ 8.19

The point of inflection is at x = 8.19, and its meaning in the context of this problem is that it represents the day when the rate of change of the stock price changes from decreasing to increasing. Before the point of inflection, the rate of decrease of the stock price is slowing down, while after the point of inflection, the rate of increase of the stock price is accelerating

To know more about "Point of Inflection" refer here:

https://brainly.com/question/30763521#

#SPJ11

When a regression model is created to fit a sample set of data, its prediction ability is reduced overfitting. Thus, option C is correct.

Overfitting is a phenomenon in machine learning where a regression model is trained too well on the sample data.

to the point where it starts to memorize the data instead of learning the underlying patterns or trends. As a result, the overfitted model may not generalize well to unseen data and may exhibit poor predictive power when used for making predictions on new data.

The term "compromising predictive power" in the question suggests that the model is not able to accurately predict outcomes on new, unseen data due to overfitting.

Essentially, the model becomes too specialized to the sample data it was trained on and loses its ability to generalize to new data points.

Flooding is not a term related to machine learning or regression modeling. Binary choice refers to a decision between two options and is not related to overfitting.

Therefore, When a regression model is created to fit a sample set of data, its prediction ability is reduced overfitting

Learn more about regression here:

https://brainly.com/question/14983410

#SPJ1

The sets of numbers that satisfy the theorem are:

d. 5, 7, 11

e. 3, 5, 11

Find three distinct prime numbers less than 12 that has sum is also prime. We can check each set of numbers given in the options to see if they satisfy the theorem.

a. 3, 9, 11

Sum = 23 (not prime)

Does not satisfy the theorem.

b. 3, 7, 13

Sum = 23 (not prime)

Does not satisfy the theorem.

c. 2, 3, 11

Sum = 16 (not prime)

Does not satisfy the theorem.

d. 5, 7, 11

Sum = 23 (prime)

Satisfies the theorem.

e. 3, 5, 11

Sum = 19 (prime)

Satisfies the theorem.

Therefore, the sets of numbers that satisfy the theorem are d and e.

Learn more about theorem.

brainly.com/question/14101142

#SPJ11

Answer:

a

Step-by-step explanation:

every second it goes down my 10

When x = -3 and dx = -0.4, dy = -0.3386. This means that when x decreases by 0.4, y decreases by approximately 0.3386 units.

To find dy, we need to take the derivative of the function y=6cos(x) with respect to x. The derivative of cos(x) is -sin(x), so the derivative of 6cos(x) is -6sin(x). Therefore, dy/dx = -6sin(x).

Now, we can evaluate dy when x = -3 and dx = -0.4. Plugging in x = -3 into the derivative we just found, we get dy/dx = -6sin(-3). Using the unit circle, we know that sin(-3) is approximately equal to -0.1411. Therefore, dy/dx = -6(-0.1411) = 0.8466.

To find dy, we can use the formula dy = dy/dx * dx. Plugging in the values we have, we get dy = 0.8466 * (-0.4) = -0.3386.

Therefore, when x = -3 and dx = -0.4, dy = -0.3386. This means that when x decreases by 0.4, y decreases by approximately 0.3386 units. This information can be useful in understanding the behavior of the function y=6cos(x) in the neighborhood of x = -3.

Overall, finding the derivative of a function allows us to understand how the function changes as its input (in this case, x) changes. By evaluating the derivative at a specific point, we can find the rate of change (dy/dx) and use it to find the change in output (dy) for a given change in input (dx).

To know more about derivative function refer here:

https://brainly.com/question/29020856

#SPJ11

The probability that the proportion of sampled teenagers who own a smartphone is between 0.45 and 0.55 is:

0.9564 - 0.2296 ≈ 0.7268

What is Probability ?

Probability is a measure of the likelihood or chance of an event occurring. It is expressed as a number between 0 and 1, where 0 represents impossibility (an event that can never occur) and 1

Part 1: The mean is calculated as:

mean = gp = 0.48

Part 2: The standard deviation is calculated as:

σ = √[(gp * (1 - gp))÷n]

where n is the sample size.

σ = √[(0.48 * 0.52)÷150]

σ ≈ 0.0408

Part 3: To find the probability that more than 50% of the sampled teenagers own a smartphone, we need to calculate the z-score and use a standard normal distribution table. The z-score is calculated as:

z = (x - gp)÷σ

where x is the proportion of teenagers owning smartphones. We want to find the probability that x is greater than 0.50. So,

z = (0.50 - 0.48)÷0.0408 ≈ 0.49

Using a standard normal distribution table, the probability corresponding to a z-score of 0.49 is approximately 0.3120.

Part 4: To find the probability that the proportion of sampled teenagers who own a smartphone is between 0.45 and 0.55, we need to standardize the range of values using the z-score formula:

z1 = (0.45 - 0.48)÷0.0408 ≈ -0.74

z2 = (0.55 - 0.48)÷0.0408 ≈ 1.71

Using a standard normal distribution table, the probability corresponding to a z-score of -0.74 is approximately 0.2296, and the probability corresponding to a z-score of 1.71 is approximately 0.9564.

Therefore, the probability that the proportion of sampled teenagers who own a smartphone is between 0.45 and 0.55 is:

0.9564 - 0.2296 ≈ 0.7268

To learn more about Probability from given link.

https://brainly.com/question/29221515

#SPJ1

Answer: D

Explanation: Since 21 out of 24 bean seeds sprouted in the first class, the probability of a bean seed sprouting is 21/24, or 0.875. This information does not provide any information about the seeds in the other five classes, other than that they were all planted using the same method. Therefore, we cannot make a definitive statement about how many seeds will or will not sprout in the other classes. Option A is supported by the given information, since 87.5% of the seeds in the first class sprouted. Option B is not necessarily supported by the given information, as it depends on how many seeds were used in total. Option C is not directly supported by the given information, but is a possible conclusion based on the probability of a seed sprouting. Option D is contradicted by the given information, since at most 3 out of 24 seeds did not sprout in the first class.

The coordinates of point P are (-3, -1).

The coordinates of point P that divides the line segment AB in the ratio 1:4 is calculated as follows;

let the ratio = a : b = 1:4

P = ( (bx₂ + ax₁)/(b + a), (by₂ +  ay₁)/( b + a) )

Where;

The coordinate of point P is calculated as follows;

P = ( (4(-2) + 1 (-7))/(4 + 1),  (4(0) + 1(-5) )/(4 + 1))

P = (-8 - 7)/(5), (0 - 5)/(5)

P = (-15/5), (-5/5)

P = (-3, - 1)

Thus, the coordinate of point P is determined by applying  ratio formula on a line segment.

Learn  more about coordinate of point here: https://brainly.com/question/17206319

#SPJ1

We can successfully multiplied n by 35 using only five multiplications by 2, two additions, and intermediate storage of results.

We can use the following sequence of operations:

Multiply n by 4 using two multiplications by 2.

Multiply n by 8 using three multiplications by 2.

Add the result of step 1 to the result of step 2 using one addition.

Multiply n by 2 using one multiplication by 2.

Add the result of step 3 to the result of step 4 using one addition.

Multiply the result of step 5 by 4 using two multiplications by 2.

Add the result of step 5 to the result of step 6 using one addition.

The final result is n × 35.

Here's how it works:

Step 1: 4n

Step 2: 8n

Step 3: 4n + 8n = 12n

Step 4: 24n

Step 5: 12n + 24n = 36n

Step 6: 144n

Step 7: 36n + 144n = 180n

So, we have successfully multiplied n by 35 using only five multiplications by 2, two additions, and intermediate storage of results.

to know more about multiplications

brainly.com/question/24327271

#SPJ1

The velocity and position of a body moving through a resisting medium with resistance proportional to its velocity are given by v(t) = v₀e^(-kt) and x(t) = x₀ + (v₀/k)(1-e^(-kt)), respectively.

We are given that the resistance of the medium is proportional to the velocity of the body, so we can write

F = -kv

where F is the force acting on the body, k is the proportionality constant, and v is the velocity of the body. Since F = ma (Newton's second law), we have

ma = -kv

Dividing both sides by m and rearranging, we get

dv/dt = -k/m × v

We can now solve this differential equation by separation of variables

dv/v = -k/m × dt

Integrating both sides, we obtain

ln|v| = -k/m × t + C

where C is the constant of integration. Exponentiating both sides, we get

|v| = e^(-k/m × t + C) = e^C × e^(-k/m × t)

Note that since v is always positive (it's the speed of the body), we can drop the absolute value signs. Also, since e^C is just a constant, we can write

v = v₀ × e^(-k/m × t)

where v₀ = e^C is the velocity of the body at time t=0.

Next, we can find the position of the body by integrating the velocity

dx/dt = v

Integrating both sides, we obtain

x(t) = x₀ + ∫ v(t) dt

where x₀ is the position of the body at time t=0. Substituting v(t) = v₀ × e^(-k/m × t), we get:

x(t) = x₀ + ∫ v₀ × e^(-k/m × t) dt

Integrating, we obtain:

x(t) = x₀ - (m/k) × v₀ × e^(-k/m × t) + A

where A is the constant of integration. We can determine A by using the initial condition x(0) = x₀, which gives

x(0) = x₀ - (m/k) × v₀ × e^(0) + A

A = x₀ + (m/k) × v₀

Substituting this into the equation for x(t), we finally get

x(t) = x₀ + (v₀/k) × (1 - e^(-k/m × t))

Learn more about velocity here

brainly.com/question/31038031

#SPJ4

The given question is incomplete, the complete question is:

Suppose that a body moves through a resisting medium withresistance proportional to its velocity v , so that dv/dt =-kv. Show that its velocity and position at time t are given by v(t)= v₀e^(-kt) and x(t) = x₀ +(v₀ / k)(1-e^(-kt)).

The general solution is: y(x) = c1e^x + c2e^-x + c3cos x + c4sin x.

For more such question on general solution

https://brainly.com/question/30079482

#SPJ11

We add 1 and 3/2 to get 5/2, which is the remainder. According to the Remainder Theorem, this is the value of P(c). Therefore, P(1/2) = 5/2.

To use synthetic division and the Remainder Theorem to evaluate P(c), we first set up the synthetic division table with the constant term of P(x) as the divisor and c as the value we want to evaluate:

1/2 | 2   9   4
   |_______
   
Next, we bring down the leading coefficient 2:

1/2 | 2   9   4
   |_______
       2

Then, we multiply c (1/2) by 2 and write the result under the next coefficient:

1/2 | 2   9   4
   |_______
       2   1

We add 2 and 1 to get 3, and then multiply c by 3 to get 3/2 and write it under the last coefficient:

1/2 | 2   9   4
   |_______
       2   1
           3/2

We add 1 and 3/2 to get 5/2, which is the remainder. According to the Remainder Theorem, this is the value of P(c). Therefore, P(1/2) = 5/2.

Visit here to learn more about Remainder Theorem  : https://brainly.com/question/9160275
#SPJ11

Okay, here are the steps to solve this problem:

1) Since ACDE is isosceles with base EC, the angles at the base (mECD and mCEA) are equal. Let's call this common angle measure θ.

2) We know: mZD = (2x + 42)°

So, (2x + 42) + θ = 180° (angles sum to 180° in a triangle)

2x + 42 + θ = 180

=> 2x = 138

=> x = 69

3) Substitute x = 69 into mZE = (4x + 14)°

=> mZE = (4(69) + 14) = 278°

4) Now we have all 3 angles:

mECD = mCEA = θ (these are equal, common base angle)

mZD = (2)(69) + 42 = 174°

mZE = 278°

5) As a check:

174 + 278 + θ = 180

θ = 128

So the degree measures of the angles are:

mECD = mCEA = 128° (common base angle)

mZD = 174°

mZE = 278°

Let me know if you have any other questions! I'm happy to explain further.

Working together, Evan and Ellie can do the garden chores in 6 hours. it takes Evan twice as long as Ellie to do the work alone. Thus it takes Evan 18 hours to do the work alone.

Let x be the number of hours Ellie takes to do the garden chores alone. Then, Evan takes 2x hours to do the same work alone.

We can express their work rates as follows:
- Ellie's work rate: 1/x (jobs per hour)
- Evan's work rate: 1/(2x) (jobs per hour)

Now, we know that if they work together, they can do the garden chores in 6 hours. This means that their combined work rate is 1/6 of the job per hour.

When they work together, their work rates add up:
1/x + 1/(2x) = 1/6 (since they complete the work together in 6 hours)

Now, let's solve for x:
1/x + 1/(2x) = 1/6
To clear the fractions, multiply both sides by 6x:
We can solve for "x", which is Ellie's time to do the work alone:
1/6 = 3/2x
2x = 18
x = 9

So, Ellie takes 9 hours to complete the garden chores alone. Since Evan takes twice as long as Ellie, he takes 2 * 9 = 18 hours to complete the garden chores alone.

Learn more about hours:

brainly.com/question/13533620

#SPJ11

It is about 1.657 times more probable to win a 6/48 lottery than a 6/52 lottery.

To find out how much more probable it is to win a 6/48 lottery than a 6/52 lottery, we need to compare their respective probabilities of winning.

The probability of winning a 6/48 lottery is given by the formula:

P(6/48) = C(6, 48) = 1/12271512

where C(6, 48) is the number of ways to choose 6 numbers out of 48.

Similarly, the probability of winning a 6/52 lottery is given by the formula:

P(6/52) = C(6, 52) = 1/20358520

where C(6, 52) is the number of ways to choose 6 numbers out of 52.

To find out how much more probable it is to win the 6/48 lottery than the 6/52 lottery, we can calculate their relative probabilities:

P(6/48) / P(6/52) = (1/12271512) / (1/20358520) ≈ 1.657

Therefore, it is about 1.657 times more probable to win a 6/48 lottery than a 6/52 lottery.

To learn more about probability visit:

https://brainly.com/question/30034780

#SPJ11

The amount of money we can make is $0.05.

We have,

P= $710

R= 5.1%

T= 12 year

Compounded Continuously:

A = P[tex]e^{rt[/tex]

A = 710.00(2.71828[tex])^{(0.051)(12)[/tex]

A = $1,309.32

Compounded Daily:

A = P(1 + r/n[tex])^{nt[/tex]

A = 710.00(1 + 0.051/365[tex])^{(365)(12)[/tex]

A = 710.00(1 + 0.00013972602739726[tex])^{(4380)[/tex]

A = $1,309.27

Learn more about Compound Interest here:

https://brainly.com/question/14295570

#SPJ1

The width and height of the rectangle is w = 23 cm and h = 18 cm

Given data ,

Let the prism be represented by the figure A

Now , the width of the prism = 23 cm

The height of the prism = 12 cm

Now , the width of the rectangle = width of prism

So , w = 23 cm

And , the height of the rectangle is = breadth of the prism = 18 cm

So , h = 18 cm

Hence , the rectangle is solved

To learn more about diagonal of a rectangle click :

https://brainly.com/question/13583275

#SPJ1

Okay, let's solve this step-by-step:

* The box is shaped like a rectangular prism

* It has dimensions:

** 18.5 inches long

** 32 inches wide

** 12.2 inches deep

To find the volume of a rectangular prism, we use the formula:

Volume = Length x Width x Depth

So in this case:

Volume = 18.5 inches x 32 inches x 12.2 inches

= 18.5 * 32 * 12.2

= 5796 cubic inches

Therefore, the volume of the box is 5796 cubic inches.

Let me know if you need more details!

The area of the segment is 1.68 squared.

The area of the shaded segment is the subtraction of the area of the triangle from the area of the sector OMN.

Therefore,

area of the segment  = ∅ / 360 πr² - 1 / 2r²sin(∅)

area of the segment  = 30 / 360 π(12)² - 1 / 2 (12)² sin 30°

area of the segment  = 1 / 12 π(144) - 1 / 2(144)0.5

area of the segment  = 12π  - 36

area of the segment  = 12(3.14) - 36

area of the segment  = 37.68 - 36

area of the segment  = 1.68 inches squared.

learn more on area here: brainly.com/question/27668188

#SPJ1

The ratios that are equivalent to the ratios in the table are 1:3 and 10:30. (optio a or d).

The given table shows two columns, A and B, with four entries each. Each entry in column A is paired with a corresponding entry in column B. To determine which ratios in the form A:B are equivalent to the ratios in the table, we need to find the common factor between each pair of entries.

Similarly, for the second row with A=3 and B=9, we can simplify the ratio to 1:3 by dividing both A and B by their greatest common factor, which is 3.

For the third row with A=4 and B=12, we can simplify the ratio to 1:3 by dividing both A and B by their greatest common factor, which is 4/2=2.

For the fourth row with A=5 and B=15, we can simplify the ratio to 1:3 by dividing both A and B by their greatest common factor, which is 5/5=1.

Therefore, the ratios in the form A:B that are equivalent to the ratios in the table are 1:3 for all four rows.

The ratio 10:30 can be simplified by dividing both terms by their greatest common factor of 10, which gives 1:3. This ratio is equivalent to the ratios in the table.

Hence the correct option is (a) or (d).

To know more about ratio here

https://brainly.com/question/28155993

#SPJ1

The given sequence [tex]a_{n}[/tex]  does not converge, but instead diverges to infinity.

In mathematics and analysis, the terms "convergence" and "divergence" are used to describe the behavior of a sequence, which is an ordered list of numbers that are generated according to a certain pattern.

[tex]\begin{}|a_n| &= \left| \frac{(-1)^{n+1} \cdot n}{n \cdot \sqrt{n}} \right| \\&= \frac{n}{\sqrt{n}} \\\lim_{{n \to \infty}} |a_n| &= \lim_{{n \to \infty}} \frac{n}{\sqrt{n}} \\&= \lim_{{n \to \infty}} \frac{\sqrt{n} \cdot \sqrt{n}}{\sqrt{n}} \\&= \lim_{{n \to \infty}} \sqrt{n}\end{align*}[/tex]

As n approaches infinity, √n also approaches infinity. Therefore, the limit of ∣[tex]a_{n}[/tex]| as n approaches infinity is also infinity.

Since, the absolute value of the sequence |[tex]a_{n}[/tex]| approaches infinity as

n approaches infinity, the sequence [tex]a_{n}[/tex] does not converge, but instead diverges to infinity.

Learn more about Limit of sequence here:

https://brainly.com/question/30647793

#SPJ1

Correct Question:find whether the sequence converges or diverges [tex]\begin{}|a_n| &= \left| \frac{(-1)^{n+1} \cdot n}{n \cdot \sqrt{n}} \right| \\&[/tex] ?

The given sequence [tex]a_{n}[/tex]  does not converge, but instead diverges to infinity.

In mathematics and analysis, the terms "convergence" and "divergence" are used to describe the behavior of a sequence, which is an ordered list of numbers that are generated according to a certain pattern.

[tex]\begin{}|a_n| &= \left| \frac{(-1)^{n+1} \cdot n}{n \cdot \sqrt{n}} \right| \\&= \frac{n}{\sqrt{n}} \\\lim_{{n \to \infty}} |a_n| &= \lim_{{n \to \infty}} \frac{n}{\sqrt{n}} \\&= \lim_{{n \to \infty}} \frac{\sqrt{n} \cdot \sqrt{n}}{\sqrt{n}} \\&= \lim_{{n \to \infty}} \sqrt{n}\end{align*}[/tex]

As n approaches infinity, √n also approaches infinity. Therefore, the limit of ∣[tex]a_{n}[/tex]| as n approaches infinity is also infinity.

Since, the absolute value of the sequence |[tex]a_{n}[/tex]| approaches infinity as

n approaches infinity, the sequence [tex]a_{n}[/tex] does not converge, but instead diverges to infinity.

Learn more about Limit of sequence here:

https://brainly.com/question/30647793

#SPJ1

Correct Question:find whether the sequence converges or diverges [tex]\begin{}|a_n| &= \left| \frac{(-1)^{n+1} \cdot n}{n \cdot \sqrt{n}} \right| \\&[/tex] ?

Cos L as a fraction in simplest terms is equal to √803 / 121

The mathematical subject of trigonometry is the study of the connections between the angles and sides of triangles.

It entails investigating trigonometric functions like sine, cosine, and tangent, which relate a triangle's angles to its sides' lengths.

To find cos L, we need to use the ratio of the adjacent side to the hypotenuse in the right triangle LMN.

cos L = LM / LN

We know that LM = √73 and LN is the hypotenuse of the triangle, which can be found using the Pythagorean theorem:

LN = √(LM² + MN²)

= √(73 + 48)

= √121

= 11

Therefore, cos L = LM / LN = √73 / 11.

To simplify this fraction, we can rationalize the denominator by multiplying the numerator and denominator by 11:

cos L = √73 / 11 × 11 / 11

= √(73 × 11) / 121

= √803 / 121

To know more about Pythagorean theorem visit:

https://brainly.com/question/14930619

#SPJ1

The general solution to Ax=b can be written as:

x = [2,2,6] T + c1*[1,1,2] T + c2*[1,0,-1] T

where c1 and c2 are arbitrary constants

Since the vectors z1 and z2 form a basis for the null space of A, any solution to Ax=0 can be expressed as a linear combination of these vectors. In other words, if x is a vector in N(A), then x can be written as:

x = c1z1 + c2z2

where c1 and c2 are constants.

To find all solutions to Ax=b, we can first find a particular solution xp to Ax=b using any method such as Gaussian elimination or inverse matrix. Then, the general solution to Ax=b can be written as:

x = xp + c1z1 + c2z2

where c1 and c2 are constants.

Let's first find a particular solution xp to Ax=b. We have:

A = [a1, a2, a3]

b = a1 + 2*a2 + a3

We want to find a vector xp such that Axp = b. We can write xp as:

xp = c1z1 + c2z2

where c1 and c2 are constants to be determined. Substituting xp into the equation Axp = b, we get:

c1a1 + c2a2 = -a3

Since the vectors z1 and z2 form a basis for N(A), we know that a linear combination of a1, a2, and a3 is equal to zero if and only if the coefficients of the linear combination satisfy the equation:

c1z1 + c2z2 = 0

In other words, we have:

c1*[1,1,2] T + c2*[1,0,-1] T = [0,0,0] T

This gives us the system of linear equations:

c1 + c2 = 0

c1 + 2c2 = 0

2c1 - c2 = 0

Solving this system of equations, we get:

c1 = 2

c2 = -2

Substituting these values into the equation xp = c1z1 + c2z2, we get:

xp = 2*[1,1,2] T - 2*[1,0,-1] T = [2,2,6] T

So, a particular solution to Ax=b is xp = [2,2,6] T.

Therefore, the general solution to Ax=b can be written as:

x = [2,2,6] T + c1*[1,1,2] T + c2*[1,0,-1] T

where c1 and c2 are arbitrary constants

To learn more matrix  visit:

https://brainly.com/question/28180105

#SPJ11

Answer: x * y = 2x + 5y. Formula used: x * y = 2x + 5y. Calculation: When x = 3, and y = 5. ⇒ 2x + 5y = (2 × 3) + (5 × 5) = 6 + 25 = 31

Step-by-step explanation: