if the speed limt was 80 kilometers per hour, and elenas mom was driving 75 miles er hourm was sh speeding? by how much?

Answer:

x=20

Step-by-step explanation:

6x+10 and 130 are equal to each other so to solve for x we set them equal

6x+10=130

   -10.  -10

6x=120

x=20

Hopes this helps please mark brainliest

The greatest possible area of the triangle be

Area = 1/2 sq. units.

Given, a triangular region with one vertex at the center of a circle of radius 1 and the other two vertices on the circle.

we have to find the greatest possible area of the given triangular region.

Let the height of the triangle be, h and the base of the triangle be b.

using Pythagoras theorem, we get

1² = h² + (b/2)²

1 = h² + b²/4

h² = 1 - b²/4

Now, the area of the triangle be,

A = 1/2×b×h

squaring both the sides,

A² = 1/4×b²×h²

A² = 1/4×b²×(1 - b²/4)

A² = 1/4×b²×(4 - b²)/4

A² = 1/16×b²(4 - b²)

On differentiating, we get

2AA' = 1/16×[2b(4 - b²) -2b³]

2AA' = 1/8×[b(4 - b²) -b³]

2AA' = 1/8×(4b - 2b³)

2AA' = 1/4×(2b - b³)

On equating with zero, we get

b(2 - b²) = 0

b = √2

so, h = 1/√2

Therefore, the greatest possible area of the triangle be

A = 1/2 sq. units.

Hence, the greatest possible area of the triangle be

A = 1/2 sq. units.

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The length of the whole field will be 400 while the width will be 200 meters.

Perimeter is the addition of an external measure of sides it will always positive.

Perimeter of square = side + side + side + side

The perimeter of the circle = πd where d is the dia of the circle.

As per the given three equal areas have been drawn,

The perimeter of this area will be as,

2x + 4y = 1600

Area A = xy

A = x(1600 - 2x)/4

A = 400x - 1/2x²

To find the maximum area take the first derivative,

dA/dx = =0

400(1) - (1/2)2x = 0

400 - x = 0

x = 400 meter

And, 4y = 1600 - 2(400)

y = 800/4 = 200 meter

Hence " The length of the whole field will be 400 while the width will be 200 meters".

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Answer:

ur not showing the points u need to plot

Step-by-step explanation:

There is percent decrease is 12%.

The difference between starting and ending values is the percentage decrease. It displays a percentage loss of value compared to the original regardless of the units. The difference between the initial and final amounts is the amount of decrease.

Given:

original quantity is 100

new quantity is 88​

So, change in quantity = 100-88= 12

and, percent decrease = 12 / 100 x 100 = 12%

Hence, there is percent decrease is 12%.

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The expression 7x−3(x−1) written as another expression is 4x + 3

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

7x−3(x−1)

There are brackets in the above expression

So, the first step is that we remove the bracket

So, we have the following representation

7x−3(x−1) = 7x − 3x + 3

Looking at the equation closely, we have like terms

So, the next step is to evaluate the like terms

Solving further, we evaluate the like terms

7x−3(x−1) = 4x + 3

The above equation cannot be further simplified

Hence, the solution or equivalent of the expression is 4x + 3

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The rate at which the area of the triangle is changing when the base of the ladder is 7 feet from the wall is [tex]\frac{527}{24}ft^2/sec[/tex].

What is triangle?

Three edges and three vertices make up a triangle, which is a polygon. It is among the fundamental shapes in geometry. Triangle ABC refers to a triangle with the vertices A, B, and C. In Euclidean geometry, any three points that are not collinear determine a singular triangle and a singular plane at the same time.

Given:

dx / dt = 2 feet / sec

We have to find dA/dt when x = 7.

Since,

Area = 1/2 x (xy)

A = 1/2 x (xy)

Differentiating both sides with respect to t

[tex]\frac{dA}{dt} = \frac{1}{2}(\frac{dx}{dt}y+\frac{dy}{dt}x)\\[/tex]                 ..(1)

We have,

x^2 + y^2 = 25^2

plug x = 7

⇒ y = √(25^2 - 7^2)

y = √(625 - 49)

y = √576

y = 24

Now plug x = 7, y = 24, dx/dt = 2 and dy/dt = -7/12 in equation (1)

[tex]\frac{dA}{dt} = \frac{1}{2} (2(24) + (-\frac{7}{12})(7)) \\ \frac{dA}{dt} = \frac{527}{24} ft^2/sec[/tex]

Hence, the rate at which the area of the triangle is changing when the base of the ladder is 7 feet from the wall is [tex]\frac{527}{24}ft^2/sec[/tex].

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(7 , -3) : Quadrant 4

(0 , 1) : y-axis

(-3 , -2) : Quadrant 3

(4 , 4) : Quadrant 1

In order to complete the square for the given equation x^2+16x=18, the number added to both sides is 64.

Complete the square is a method used to solve a quadratic equation by changing the form of the equation so that the left side is a perfect square trinomial. To complete the square, add or subtract the same value to both sides. In this case, add the square of half the coefficient of the x -term, (b/2)^2 to both sides of the equation. Hence, the number to add would be (16/2)^2 = 64.

Thus,

x^2+16x + 64 =18 + 64

x^2+16x + 64 =82

x^2+ 2*8x + 64 =82

(x + 8)^2 = 82

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The number k is equal to 60 when the top right angle at the intersection of the lines y and x is (2 k + 11) degrees and the bottom left angle is 131 degrees.

Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a statement. It's possible to multiply, divide, add, or subtract with this mathematical operation. An expression, often known as a mathematical expression, is a finite collection of symbols that are well-formed in accordance with context-dependent principles. A mathematical expression is a sentence that includes numbers, variables, or both. The equal sign is never used in expressions. A mathematical statement stating the equality of two expressions is known as an equation.

Here,

Those two angles have the same measure. so you have,

2k+11=131

22k=120

k=60

The value of k where at the intersection of lines y and x, the top right angle is (2 k + 11) degrees and at the intersection of lines z and x, the bottom left angle is 131 degrees is 60.

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All of the claims about the multiple regression output are correct. The first independent variable (X1) was a continuous-scale quantitative variable, whereas the second variable (X2) was coded 0 if Yes and 1 if No.

Multiple regression is an effective statistical approach for analyzing the associations between multiple independent variables and a single dependent variable. Multiple regression has numerous uses in the social sciences, and recent research used it to analyze the connection between two independent factors and a single dependent variable.

Finally, the total model is statistically significant, the slope coefficient for variable X1 is considerably different from zero, and the model explains almost 63% of the variance in the dependent variable.

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Answer:

23 adult tickets and 92 children tickets

Step-by-step explanation:

Answer:

he sold 23 adults tickets and 93 children

Step-by-step explanation:

The probability of getting the 6 on the first die given that the minimum of two numbers is 4 would be 0.11.

What is the probability?

Probability is a branch of mathematics that deals with numerical descriptions of how likely an event is to occur or how likely a proposition is to be true. The probability of an event is a number between 0 and 1, where 0 indicates the event's impossibility and 1 indicates certainty.

Two dice are rolled.

Then the sample space (n) = 36

Possible outcomes = {(6,1), (6, 2), (6, 3), (6, 4)}

Probability = 4/36

                 = 0.11

Hence, the probability of getting the 6 on the first die given that the minimum of two numbers is 4 would be 0.11.

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The slope of the line is 0.4, Kyle runs (2/5)th of a lap in a minute, and In 30 minutes, she would run 12 laps.

As per the given graph, the slope of the line as:

m = (4.4 - 2.2)/(11 - 5.5)

m = 0.4

The equation of line as:

y = 0.4x + 0

y = (2/5)x

So, Kyle runs (2/5)th of a lap in a minute.

In 30 minutes, she would run:

y = (2/5) x 30

y = 12 laps

Therefore, the slope of the line is 0.4, Kyle runs (2/5)th of a lap in a minute, and In 30 minutes, she would run 12 laps.

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The question seems to be incomplete the correct question has been attached

Answer:

4680

Step-by-step explanation:

The area of the rectangular pasture is found to be 80,000 ft².

Given:

Let the pasture's rectangular length be l feet.

Given that the rectangular pasture's length being 200 feet longer than its breadth, its width must be w = l200 feet.

The pasture's boundary is;

2(l + w) = 1200

2(l + l - 200) = 1200

2l - 200 = 600

l = 400 feet

Width; w = l - 200

w = 400 - 200 = 200 feet

Rectangular area;

A = l x w

A = 400 x 200

A = 80,000 ft²

Thus, the area of the rectangular pasture is found to be 80,000 ft².

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The area to the left of 25 is 0.6664, the area to the left of 17 is 0.2389, the area to the right of 22 is 0.5000, the area to the right of 27 is 0.2389, and the area between 17 and 30 is 0.6340.

μ = population mean = 22

σ = standard deviation = 7

The area from normal distribution can be calculated using z test or normal distribution formula.

a) The area to the left of 25 is

P(x ≤ 25) = P(z ≤ [tex]\frac{x-\mu}{\sigma}[/tex])

= P(z ≤ [tex]\frac{25-22}{7}[/tex])

= P(z ≤ 0.43)

using z table and we get,

= 0.6664

b) The area to the left of 17 is

P(x ≤ 17) = P(z ≤ [tex]\frac{x-\mu}{\sigma}[/tex])

= P(z ≤ [tex]\frac{17-22}{7}[/tex])

= P(z ≤ -0.71)

using z table and we get,

= 0.2389

c) The area to the right of 22 is

P(x > 22) = 1 - P(z ≤ [tex]\frac{x-\mu}{\sigma}[/tex])

= 1 - P(z ≤ [tex]\frac{22-22}{7}[/tex])

= 1 - P(z ≤ 0.00)

using z table and we get,

= 1 - 0.5

= 0.5000

d) The area to the right of 27 is

P(x > 22) = 1 - P(z ≤ [tex]\frac{x-\mu}{\sigma}[/tex])

= 1 - P(z ≤ [tex]\frac{27-22}{7}[/tex])

= 1 - P(z ≤ 0.71)

using z table and we get,

= 1 - 0.7611

= 0.2389

e) The area between 17 and 30 is

P(17 ≤ x ≤ 22) = P([tex]\frac{x-\mu}{\sigma}[/tex] ≤ z ≤ [tex]\frac{x-\mu}{\sigma}[/tex])

= P([tex]\frac{17-22}{7}[/tex] ≤ z ≤ [tex]\frac{30-22}{7}[/tex])

= P(-0.71 ≤ z ≤ 1.14)

= P(z ≤ 1.14) - P(z ≤ -0.71)

using z table and we get,

= 0.8729 - 0.2389

= 0.6340

Thus, the area is 0.6664 for area in the left of 25, the area is 0.2389 for area in the left of 17, the area is 0.5 for area in the right of 22, the area is 0.2389 for area in the right of 27, and the area is 0.634 for area between 17 and 30.

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A) Both the graphs A and B are functions, here the vertical lines can intersect the curve A and B more than once. So, A and B graphs are functions.

B) The incorrect graph is A

A function from a set X to a set Y in mathematics assigns to each element of X exactly one element of Y. The domain of the function is the set X, and the codomain of the function is the set Y.

A) Examine the graph to determine whether any vertical lines generated meet the curve more than once. If such a line exists, the graph does not reflect a function. The graph represents a function if no vertical line intersects the curve more than once.

A and B are functions, according to this.

B) A is the incorrect graph.

Because Robert's acceleration will change

Curved lines have varying slopes; they can begin with a very modest slope and then curve quickly (either upwards or downwards) towards a huge slope. In either case, the curving line with a changing slope indicates fast motion (i.e., changing velocity).

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Answer: 90

Step-by-step explanation:

7 * 10 = 70

2 * 10 = 20

70 + 20 = 90

The proportional equation for c in terms of j as per the question statement will be equal to c = 0.39(j).

Equations are mathematical expressions that have two algebras on either side of an equal (=) sign. The expressions on the left and right are shown to be equal to one another, demonstrating this relationship. L.H.S. = R.H.S. (left-hand side = right side) is a fundamental simple equation.

As per the given information in the question,

Price of 13 bottles = $5.07

Then, the price of each bottle = 5.07/13 = $0.39

As per the statement in the question,

The total cost is represented by c and the number of bottles will be j.

Then, the proportional equation will be,

c = 0.39(j)

As the number of bottles will increase, the total price will also increase with it.

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Synthetic division yields the result 3x^2 + 2x - 7 when the equation

3x^3 - x^2 - 9x + 7 is divided by x - 1.

What is synthetic division?

Synthetic division in algebra is a technique that requires less writing and calculation than long division to manually divide polynomials into their Euclidean parts. The method can be applied to division by any polynomial, although it is typically taught for division by linear monic polynomials.

Consider the given polynomial 3x^3 - x^2 - 9x + 7.

We have to divide this polynomial by x - 1 using synthetic division.

           3x^2 + 2x - 7

________________________

(x - 1)√(3x^3 - x^2 - 9x + 7)

           3x^3 - 3x^2

______________________

                     2x^2 - 9x + 7

               -     2x^2 - 2x

__________________________

                              -7x + 7

                         -    -7x + 7

   _________________________

                                 0 + 0

Hence, Synthetic division yields the result 3x^2 + 2x - 7 when the equation 3x^3 - x^2 - 9x + 7 is divided by x - 1.

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Mark as brainiest

Answer:

1/8 pounds

because half of 1/2 is 1/4 and half of that is 1/8 so into 4 eqaula parts ots would be 1/8

The pool's water is changing height at a pace of 0.283 feet per minute.

Given,

Right circular cylinder shaped pool.

The radius of the pool = 3 feet

The height of the pool = 8 feet

Imagine that 6 cubic feet of water per minute is continuously being poured into a swimming pool in the shape of a right circular cylinder.

We have to find the rate of change of the height of the water in the pool when the depth of the water in the pool is 6 feet;

Here,

Due to the swimming pool's right circular cylinder shape, its volume equals;

V(c) = π × r² ×h

Where r is the radius of the base and h the height

We take differentiation on both sides of the equation to get:

dV/dt  = π × r² × dh/dt

Since the pool is a right circular cylinder and dV/dt is constant at 6 ft3/min, the rate of change in water height in the pool is independent of water height.

Then:

6  = π × r² × dh/dt

dh/dt = 6 / π × 3²

dh/dt = 8/113,04

dh/dt = 0.283 ft/min

Therefore,

The rate of change of the height of the water in the pool is 0.283 feet/min

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The latest sentence of proof by using the triangle congruence method we can conclude that f+e=c, [tex]a^{2} + b^{2} = c^{2}[/tex].

Given that ΔABC and ΔCBD are right triangles

Therefore, one angle of both triangle is of 90°

So, ∠B is same in both triangles. Hence, by suing the Angle-Angle theorem rule we can conclude that both ΔABC and ΔCBD are similar.

Consequently, ∠A is same in both triangles. Hence, by suing the Angle-Angle theorem rule we can conclude that both ΔABC and ΔCBD are similar.

Similarly, When two triangles are similar then their corresponding angles are equal and their corresponding sides are also equal.

Therefore , the two proportions can be rewritten as

a² = cf ( equation 1 )

b² = ce ( equation 2 )

By adding b² on both side of equation 1 then we can write equation 1 as

[tex]a^{2} + b^{2} = b^{2}+cf[/tex]

[tex]a^{2} + b^{2} = ce+cf[/tex]

Because b² and ce are equal and substitute on the right side of equation 1

Using the converse of distributive property  in above equation then we get a new equation. That is,

[tex]a^{2} +b^{2} = c(f+e)[/tex]

Because distributive property is a(b+c)=a(b+ac)

a² + b² = c²

Because e + f = c²

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Answer:

9x + 16

Step-by-step explanation:

When you are finding the perimeter of each shape, you are essentially combining all of the shape's side measurements together.

In this case, you are given a triangle, which has 3 sides. Add the 3 side's measurements together to obtain the perimeter of the given triangle.

P (Perimeter of triangle) = (3x + 10) + (3x) + (3x + 6)

Combine like terms. Like terms are terms that have the same variables:

P = (3x + 3x + 3x) + (10 + 6)

P = (9x) + (16)

P = 9x + 16

9x + 16 is your answer.

~

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The constant of proportionality for the given set of values of x and y is found as 1/2.

For the given question,

The table for the two value of x and y are given below.

The value of constant of proportionality for every pair of values will be same.

Thus,

k = x/y

For x = 2 and y = 4

k = 2/4

k = 1/2

Thus, the constant of proportionality for the given set of values of x and y is found as 1/2.

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The correct statement about the pair of lines will be;

''The lines are perpendicular because they intersect at a right angle.''

Option 4 is true.

What is Line segment?

Line segment is a part of the line which have two endpoints and bounded by two distinct end points and contain every point on the line which is between its endpoint.

Given that;

The pair of lines are shown in figure.

Now,

By figure, we see that;

The lines are perpendicular because they intersect at a right angle.

Thus, The correct statement about the pair of lines will be;

''The lines are perpendicular because they intersect at a right angle.''

Option 4 is true.

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Answer: he need 6 day to get the 32 show