I WILL NAME YOU THE BRAINLIEST IF YOU PLEASE HELP ME!
solve the system by graphing.
y = x + 2
2x - y = -1

Answer:

  7.07 cm/min

Step-by-step explanation:

You want the rate of change of water level in a conical tank 16 m high with radius 4 m when the level is 12 m and the water is draining at 2 m³/min.

The level of water in the tank is 12/16 = 3/4 of the height of the tank, so the radius of its surface is (3/4)(4 m) = 3 m. The surface area is ...

  A = πr²

  A = π(3 m)² = 9π m² ≈ 28.3 m²

The rate of change of level is the rate of change of volume divided by the surface area:

  V'/A = (-2 m³/min)/(9π m²) = -2/(9π) m/min ≈ -0.07074 m/min

The water level is falling at about 7.07 cm/min.

The value of an integer or any letter associated with a variable is known as its coefficient. In the expression 2x + 3y, for instance, the variable x has a coefficient of 2 and the variable y has a coefficient of 3.

There are 842 buttons in 36 shirts and 42 jackets if the number of buttons in each is equal to x.

Additionally, the collection of six shirts and seven jackets has 137 buttons.

It can be expressed using the following equations:

36 x + 42 y = 842 ------(1);

6 x + 7 y = 137 ------(2);

6 x + 36 x + 42 y = 822 ------(3).

Although the constant term on one side of equation is different, the x and y coefficients are the same in both of these equations. This indicates that neither equation has a solution.

I.e →a1/a2=b1/b2≠c1/c2

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Z-score of age of airline passenger is 2.571

Age of airline passenger when x = 85 , μ = 49 and σ = 14 .Find standardized z-score ?

Z- Score give an idea how far a data point is from mean .

z = x- μ / σ where numerator is difference between the random variable and the actual mean dividing by the standard deviation .

Given , x = 85

mean = 49

standard deviation = 14

z-score = x- μ / σ

putting all the values ,

z-score = 85 - 49 / 14

= 36 / 14

= 2.571

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The equation that represents the situation is 2(x+17/4+x) = 249/2 where x is the width, the width of the postage stamp is 29 millimeters and its length is 33.25 millimeters.

According to the question,

We have the following information:

The length of a postage stamp is [tex]4\frac{1}{4}[/tex] millimeters longer than its width. The perimeter of the stamp is [tex]124\frac{1}{2}[/tex] millimeters.

Now, let's take the width of the stamp to be x millimeters.

Length of the stamp = x + 17/4

(We have the converted the fractions from the mixed fraction.)

Now, we have the following expression because the stamp is in the shape of a rectangle:

2(length+width) = 249/2

a) 2(x+17/4+x) = 249/2

b) 2(2x+17/4) = 249/2

Dividing by 2 on both sides of the equation:

2x+17/4 = 249/2*2

2x+17/4 = 249/4

Subtracting 17/4 from both sides of the equation:

2x = 249/4 - 17/4

2x = 232/4

Dividing by 2 on both sides:

x = 232/(4*2)

x = 116/4

x = 29 millimeters

c) Length of the stamp = 29+17/4

Length = (116+17)/4

Length = 133/4

Length = 33.25 millimeters

Hence, the equation that represents the situation is 2(x+17/4+x) = 249/2 where x is the width, the width of the postage stamp is 29 millimeters and its length is 33.25 millimeters.

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Answer: The answer will be 74.07 percent.

According to the question, let the number be x

Then, x*54/100 = 40

x = 40 × 100 / 54

x = 74.07 (approx)

The equation of the perpendicular line that passes through the point (- 3, - 1) is y = 2 · x + 5.

In this question we must determine the equation of a line that is perpendicular to another line and pass through a given point. Mathematically speaking, lines are represented by the following equation:

y = m · x + b

Where:

And the slopes of two lines perpendicular to each other satisfy the following relationship:

m · m' = - 1

Where:

First, determine the slope of the perpendicular line by means of the slope relationship:

m = - 1 / 2

m' = - 1 / m

m' = - 1 / (- 1 / 2)

m' = 2

Second, find the intercept of the perpendicular line by the equation of the line:

b = y - m · x

b = - 1 - 2 · (- 3)

b = - 1 + 6

b = 5

Third, write the equation of resulting line:

y = 2 · x + 5

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The total amount of money Riley needs to save to buy the new scooter is $200.

Percentage is the number or ratio which is expressed as "100". It is denoted by "%". It indicates the hundredth parts of any quantity.

It is calculated by dividing the value by total value and multiplied by 100.

Formula for percentage is (Value/total value)*100

For given information,

Riley saved $60 which is 30% of the total amount.

For 1% it will be $2

So, the total amount will be $200

Thus, the total amount of money Riley needs to save to buy the new scooter is $200.

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Answer:

x^4 times q^2

Step-by-step explanation:

Answer:

Step-by-step explanation:

this looks tough, but just remember that powers can be rewritten like this

[tex]\sqrt{x^{4} x^{2} q^{4} }[/tex]

then just break up the square root sign, which is another property of square roots

[tex]\sqrt{x^{4} }[/tex]*[tex]\sqrt{x^{2} }[/tex]*[tex]\sqrt{q^{4} }[/tex]

you could break the [tex]x^{4}[/tex] into two  [tex]x^{2}[/tex] but I think you can see that it will just be [tex]x^{2}[/tex] once it's pulled out of the square root

[tex]x^{2} *x*q^{2}[/tex]

[tex]x^{3}[/tex]*[tex]q^{2}[/tex]

Does this all make sense?

Answer:

Re-arrange the terms and combine the like terms.

2

3

y

−

1

3

y

−

3

−

4

=

1

3

y

−

7

Step-by-step explanation:

Answer:

No, it doesn't have all lines of symmetry

Step-by-step explanation:

If you can see, the triangle's line of symmetry is from a vertex to the center of another line. So, draw a line from the bottom left vertex (corner) to the center of the right side/line. And then, draw another from the right corner to left center line.

AB = r AB

This is a dilation of similar triangles dilated by scale factor r.

Option B is the correct answer.

It is a two-dimensional figure which has three sides and the sum of the three angles is equal to 180 degrees.

We have,

Dilation means the original triangle is resized by the given dilation scale factor.

We multiply the scale factor with the original value.

Here,

AB, DE, and DF are the sides of the triangle.

If a side of the triangle is dilated we must have the same side along with the dilation scale factor r.

Now,

A) AB = r DF

This is not correct.

B) AB = r AB

This is correct.

C) AB = r DE

This is not correct.

D) AB = r EF

This is not correct.

Thus,

AB = r AB

This is a dilation of similar triangles dilated by scale factor r.

Option B is the correct answer.

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The probability of selecting at least one experienced IPV is 0.598 and at least one did not experience IPV is 0.866.

In the given question we have to find the probability of selecting at least one experienced IPV and at least one did not experience IPV

From the given table

Probability of experiencing IPV

P(Experienced IPV) = 366 / 1000 = 0.366

Probability of not experiencing IPV

Q(Not-experienced IPV) = 634 / 1000 = 0.634

Now when n samples are chosen from the population, the binomial probabilty distribution follows (P + Q)^n.

Here, n = 2,

So, (p +q)^2 = p^2 + 2pq + q^2

p^2 = Both experienced IPV

2pq = One has experienced IPV and other hasn’t

q^2 = None have experienced IPV.

A. Finding the probability of at least one experienced IPV.

P(At least one has experienced IPV) = P^2 + 2PQ

                                                         = (0.366)^2 + 2(0.366)(0.634)

                                                         =0.1339+0.4641

                                                         = 0.598

B. Finding the probability of at least one did not experienced IPV.

Q(At least one did not experienced IPV) = Q^2 + 2PQ

                                                                   = (0.634)^2 + 2(0.366)(0.634)

                                                                   =0.4019+0.4641

                                                                   = 0.866

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Using graphing calculator, the solution to the inequality is attached

An inequality can be represented graphically as a region on one side of a line. Inequalities that use < or > symbols are plotted with a dashed line to show that the line is not included in the region. Inequalities that use ≤ or ≥ symbols are plotted with a solid line to show that the line is included in the region.

To graph a linear inequality in two variables (say, x and y ), first get y alone on one side. Then consider the related equation obtained by changing the inequality sign to an equality sign. The graph of this equation is a line.

If the inequality is strict ( < or > ), graph a dashed line. If the inequality is not strict ( ≤ or ≥ ), graph a solid line.

Using a graphing calculator;

Kindly find the attached graph as solution to the inequality

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Answer: 4 reds

Step-by-step explanation:

Answer:

Rs. 450

Step-by-step explanation:

Selling Price ----- 750

Reduced by 40% therefore 40/100 x 750

=300

750-300= 450

Answer:

$450

Step-by-step explanation:

40 percent *750 =

(40:100)*750 =

(40*750):100 =

30000:100 = 300

750-300=$450

The interior angles are 43°, 43° and 94°. and  exterior angle is 86°

Let the interior angles are ∠A, ∠B and ∠C.

From the question, we have

∠A = (5x-12)°

exterior angle = (8x-2)°

As the sides are equal

∠A =∠B = (5x-12)°

∠C = 180°-(8x-2)°

=182°-8x

Sum of interior angles of a triangle is equals to 180 degree.

∠A + ∠B + ∠C = 180°

(5x-12)°+(5x-12)°+182°-8x = 180°

2x+158° = 180°

x = 11°

Interior angles,

∠A =∠B = (5x-12)°

= (5*11-12)°

=43°

∠C =182°-8x

=182°-8*11

=94°

exterior angle = (8x-2)°

=8*11-2

=86°

Multiplication:

Finding the product of two or more numbers in mathematics is done by multiplying the numbers. It is one of the fundamental operations in mathematics that we perform on a daily basis. Multiplication tables are the main use that is obvious. In mathematics, the repeated addition of one number in relation to another is represented by the multiplication of two numbers. These figures can be fractions, integers, whole numbers, natural numbers, etc. When m is multiplied by n, either m is added to itself 'n' times or the other way around.

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The width and length of the rectangle will be 4 units and 8 units, respectively.

Let W be the rectangle's width and L its length.

The area of the rectangle is the multiplication of the two different sides of the rectangle. Then the rectangle's area will be

Area of the rectangle = L × W square units

The width of a square shape is 4 units less than the length. The region of the square shape is 32 square units. Then the equations are given below.

W = L - 4               ...1

L × W = 32           ...2

From equations 1 and 2, then we have

L × (L - 4) = 32

L² - 4L = 32

L² - 4L - 32 = 0

L² - 8L + 4L - 32 = 0

L(L - 8) + 4(L - 8) = 0

(L - 8)(L + 4) = 0

L = 8, -4

Then the width of the rectangle is given as,

W = 8 - 4

W = 4 units

The width and length of the rectangular shape will be 4 units and 8 units, separately.

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Answer:

According to sources on googIe, the average price of a hot dog would be $5.22.

If a shopper needs 48 hot dogs, they would need a total of $250.56 dollars to pay.

Step-by-step explanation:

48 x 5.22 = 250.56

Answer:

no, because 3 + 5 < 9

Step-by-step explanation:

given three sides of a triangle

For the sides to form a triangle the sum of any 2 must be greater than the third.

given sides 3, 5 and 9 , then

3 + 9 = 12 > 5

5 + 9 = 14 > 3

3 + 5 = 8 < 9

the 3 sides do not form a triangle since 3 + 5 < 9

Probability that the second card is an ace, given that the first card is an ace is 1/ 221

Without replacement means drawing the card first but not putting back to the deck and then drawing again.

Total number of cards in a deck = 52

Number of an ace in whole deck = 4

let event of getting an ace in first draw be A

and event of getting an ace in second draw be B

P(A) = 4 / 52 = 1 /13

drawing without replacement

P(B) = 3 / 51 = 1 / 17

Probability that second card is an ace given that first card is an ace is

P(A).P(B) =

1/13 × 1/ 17 = 1 / 221

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Answer:

y=-1(-3)+2

Step-by-step explanation:

on my test

The speed of the football in the air is 7.1 yards per second

From the question, the given parameters are:

Distance = 60 yards

Time to cover this distance = 8,5 seconds

The speed of the football in the air is calculated as

Speed = Distance/Time to cover this distance

Substitute the known values in the above equation

So, we have the following equation

Speed = 60/8.5

Evaluating the quotient in the above equation, we have

Speed = 7.1

Hence, the ball's speed in air is 7.1 yards per second

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Answer:

Answer D

Step-by-step explanation:

Multiply them all out. D is 4.04

Answer: D is correct I took the test without having to see the answer just wanted to help u out:)

Step-by-step explanation:

Answer:

Basically Mate you gotta make a perpendicular line from the letter your told make a line from and then thats for the 2 pages basically they want you to do the same thing that is done but you do it for the letter.

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The option that explains Sarita's mistake is Sarita’s solution is correct. She made an error in her verification.

The given equation is: 5(x - 3) + 7(x + 4) = 73

In order to determine the value of x, take the following steps:

1. Apply the Distributive property:

5x - 15 + 7x + 28 = 73

2. Add similar terms together:

12x  + 13 = 73

3. Combine similar terms:

12x = 73 - 13

4. Add similar terms

12x = 60

5. Divide both sides of the equation by 12

x = 60 / 12

x = 5

In order to verify the answer, substitute for x in the given equation :

5(5 - 3) + 7(5 + 4) = 73

5(2) + 7(9) = 73

10 + 63 = 73

73 = 73

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The volume of the cylinder is 18149.2 yards³.

It is important to note that the volume of a cylinder is calculated as:

Volume = πr²h

Radius = 17

Height = 20

Therefore, the volume will be:

Volume = πr²h

Volume = 3.14 × 17² × 20

Volume = 18149.2

The volume is 18149.2 yards³.

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Answer:

x = ± 9

Step-by-step explanation:

x² = 81 ( take square root of both sides )

x = ± [tex]\sqrt{81}[/tex] = ± 9

[tex]{ \red{ \boxed{ \pink{ \sf{x = 9}}}}}[/tex]

Step-by-step explanation:

Here, the question is,

[tex]{ \green{ \sf{ {x}^{2} = 81}}}[/tex]

Apply square root on both the sides then,

[tex]{ \green{ \sf{ \cancel { \sqrt{x} }^{ \cancel2}}}} \: = { \green{ \sf{ \sqrt{81}}}} [/tex]

Now,

[tex]{ \green{ \sf{x = \sqrt{81}}}} [/tex]

We got √81 as answer but what is the perfect square number of 81? That is 9. Same number when multiplied twice to get the resultant number makes a perfect square number. i.e. 9×9 = 81. So, the answer is

[tex]{ \green{ \boxed{ \red{ \tt{x = 9}}}}}[/tex]