Sombody hellllllllllllllp (90) points
Explanation and answer

Answer:

pppppppppppppppppppppppppppppppppppppppppp

Answer:

36 mph

Step-by-step explanation:

d = rt

d = (x)(3.6)

d = (x-4)(4)

3.6x = 4x - 16

-0.4x = -16

x = 40

Her speed was 40 on Thursday, so 36 on Friday

The speed of Debbie on Friday is 36 miles per hour.

Speed is the unit rate in terms of distance travelled by an object and the time taken to travel the distance.

Speed is a scalar quantity as it only has magnitude and no direction.

Let d be the distance of her mother's house.

Let x be the speed of Debbie on Thursday.

x = d / 3.6

⇒ d = 3.6x

Speed on Friday = x - 4

Speed on Friday = d / 4

d / 4 = x - 4

⇒ d = 4 (x - 4)

Equating both the equations of d, we get,

4(x - 4) = 3.6x

4x - 16 = 3.6x

4x - 3.6x = 16

0.4x = 16

x = 40

Speed of Debbie on Thursday = 40 mile per hour

Speed of Debbie on Friday = 40 - 4 = 36 mile per hour

Hence the speed of Debbie on Friday is 36 miles per hour.

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Answer:

1.2

Step-by-step explanation: it just is

The length of the pool is 5 meters

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

The length of the pool is calculated as

Length = Surface area / Width

substitute the known values in the above equation, so, we have the following representation

Length = 20/ 4

EValuate

Length = 5

Hence, the length is 5 meters

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Answer

Step-by-step explanation:

Its the second One

Answer:

they are not perpendicular because their slopes are not negative reciprocals of each other

Step-by-step explanation:

Answer:

there's no image lol

Step-by-step explanation

9514 1404 393

Answer:

  x = 6

Step-by-step explanation:

The Pythagorean theorem tells you the relationship between the sides of this right triangle is ...

  x² +8² = 10²

  x² = 100 -64 = 36 . . . . subtract 8²

  x = √36 . . . . . . . . . . take the square root

  x = 6

The theorem of similarity implies that the line segment divided the triangle into the proportional segment.

It should be noted that the theorem of similarity states that the line segment splits two sides of a triangle into proportional segments.

This occurs when the side is parallel to the third side of the triangle.

These three theorems, known as Angle-Angle (AA), Side-Angle-Side (SAS), and Side-Side-Side are foolproof methods for determining similarity in triangles.

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Answer:

the answer is A

Step-by-step explanation:

be my friend please

Step-by-step explanation:

In geometry, a line can be defined as a straight one- dimensional figure that has no thickness and extends endlessly in both directions. It is often described as the shortest distance between any two points.

Answer:pretty sure it is B

Step-by-step explanation:dk

Answer:

D(30,60)

Step-by-step explanation:

It was way outside the other points that are around the line.

The point (30,60) is a high leverage point on the regression plot.

High leverage points are those that are extreme but follow the regression equation's trend.

High leverage points are distinct from outliers, which deviate from the graph's or plot's pattern or trend.

Looking closely at the regression plot, the coordinate (30,60) follows the trend of the plot, however, it is farther from the majority of the points on the graph.

Hence, the point (30,60) is a high leverage point on the regression plot.

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Answer:

The area of the trapezoid is 56.25² feet.

Step-by-step explanation:

The formula for the area of a trapezoid is \(A=\frac{b+B}{2} h\)

*Note: Trapezoids have 2 bases that are parallel to one another, but are not always the same length.

Using the information given to us, we can simply plug in numbers into the equation. By doing so, we'd get \(A=\frac{7.9+14.6}{2} 5\). By plugging this into a calculator, you'd get \(A=56.25\).

Answer:

D

Step-by-step explanation:

2.2 : x = 4.1 : 12.3

2.2/x = 4.1/12.3 = 1/3

so x = 2.2 * 3 = 6.6

D

Answer:

Step-by-step explanation:

The results do not apply to any population because this was a convenience sample.

The confidence interval (0.53, 0.72) applies only to the population of those students who drive to the college. The correct answer is D.

The confidence interval is a statistical measure used to estimate an unknown population parameter, such as the proportion of students who support the building of a multi-level parking structure.

In this case, the students conducting the survey set up a table near the student parking lot and asked students who passed by to complete the survey. Therefore, the sample used for the survey consists only of students who use the student parking lot.

Since the survey was conducted exclusively among students who use the parking lot, the results and the subsequent confidence interval can only be generalized to that specific population.

The confidence interval (0.53, 0.72) represents the estimated range of proportions of students who support the parking structure within the population of students who drive to the college. It cannot be extended to the entire student body, students who do not use the parking lot, or any other population beyond those who drive to the college.

The correct answer is D.

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Answer:

c

Step-by-step explanation:

Let,

T = Triangle

S = Semi Circle

R = Star

D = Diamond

Given:

a.) 4 Triangles = 2 Semi Circle + 2 Star → 4T = 2S + 2R

b.) 1 Triangle + 1 Diamond = 1.05 → 1T + 1D = 1.05

c.) 1 Star + 1 Semi Circle = 0.525 → 1R + 1S = 0.525

d.) Diamond = ?

For us to be able to determine the value of the diamond, we must be able to determine the value of the Triangle.

For us to get it, we will be using first the equation at a and c.

4T = 2S + 2R

1R + 1S = 0.525

We get,

2S + 2R = 2(1S + 1R)

2S + 2R = 2(0.525)

2S + 2R = 1.05

Let's now get the value of the triangle,

4T = 2S + 2R

4T = 1.05

T = 1.05/4

T = 0.2625 (Value per triangle)

Let's now determine the value of the DIAMOND.

1 Triangle + 1 Diamond = 1.05 → 1T + 1D = 1.05

1T + 1D = 1.05

1(0.2625) + 1D = 1.05

0.2625 + 1D = 1.05

1D = 1.05 - 0.2625

1D = D = 0.7875

ANSWER: The value of the diamond is 0.7875

Answer:b

Step-by-step explanation:

y = 1/3x - 21 is the equation of the line in slope-intercept form.

What is a slope?

Slope is a measure of the steepness or incline of a line. It describes how much the dependent variable (usually y) changes for a given change in the independent variable (usually x).

The slope-intercept form of a linear equation is y = mx + b, where m is the slope and b is the y-intercept.

We are given that the slope is 1/3 and that the line passes through the point (3, -20). We can use the point-slope form of a linear equation to find the equation of the line:

y - y1 = m(x - x1)

where (x1, y1) is the point through which the line passes, and m is the slope. Plugging in the values we have:

y - (-20) = 1/3(x - 3)

Simplifying this equation:

y + 20 = 1/3x - 1

Subtracting 20 from both sides:

y = 1/3x - 21

This is the equation of the line in slope-intercept form.

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Answer:

(1,-1)

(0,4)

(-2,14)

Step-by-step explanation:

5 * 1 = 5 + -1 = 4

5 * 0 = 0 + 4 = 4

5 * -2 = -10 + 14 = 4

By placing the given value in equation , we get u + v - 4u = (-20, 13)

A physical quantity that has both directions and magnitude is referred to as a vector quantity.

A lowercase letter with a "hat" circumflex, such as "û," is used to denote a vector with a magnitude equal to one. This type of vector is known as a unit vector.

To evaluate u + v - 4u, we first need to find the vector 4u, which is obtained by multiplying the vector u by the scalar 4:

4u = 4(5,-2) = (20,-8)

Now, we can add u and v, and subtract 4u from the result:

u + v - 4u = (5,-2) + (-5,7) - (20,-8)

= (5 - 5 - 20, -2 + 7 + 8)

= (-20, 13)

Therefore, u + v - 4u = (-20, 13).

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Answer:

256

Step-by-step explanation:

4x4x4x4=256

Answer:

256

Step-by-step explanation:

4^4

4 * 4 * 4 * 4

16 * 4 * 4

64 * 4

256

To reflect a point over the y-axis, we negate the x-coordinate of the point. To reflect the resulting point over the x-axis, we negate the y-coordinate of the point. So, to find the new point A'', we can perform these operations on the original point A:

1. Reflect A over the y-axis to get A': (-2, 2)

2. Reflect A' over the x-axis to get A'': (-2, -2)

Therefore, the new point A'' is (-2, -2).

The value of arccot(1/√3) is the angle whose cotangent is equal to 1/√3. Since cot(π/6) = √3, we have arccot(1/√3) = π/6. Therefore, the option "arccot(1/√3) = 2π/3" is incorrect.

The study of the connection between triangle side lengths and angles is known as trigonometry. The concept first originated in the Hellenistic era, during the third century BC, due to the application of geometry in astronomical investigations. The subject of mathematics known as exact techniques deals with certain trigonometric functions and their possible applications in calculations. There are six commonly used trigonometric functions in trigonometry. Sine, cosine, tangent, cotangent, secant, and cosecant are their separate names and acronyms (csc). The study of triangle characteristics, particularly those of right triangles, is known as trigonometry. As a result, geometry is the study of the properties of all geometric forms.

arcsec(√2) = 3π/4

arccsc(-1) = π

arccot(1/√3) = π/6

The value of arcsec(√2) is the angle whose secant is equal to √2. Since sec(π/4) = √2, we have arcsec(√2) = π/4. Therefore, the option "arcsec(√2) = π/4" is incorrect.

The value of arccsc(-1) is the angle whose cosecant is equal to -1. Since csc(π) = -1, we have arccsc(-1) = π. Therefore, the option "arccsc(-1) = 0" is incorrect.

The value of arccot(1/√3) is the angle whose cotangent is equal to 1/√3. Since cot(π/6) = √3, we have arccot(1/√3) = π/6. Therefore, the option "arccot(1/√3) = 2π/3" is incorrect.

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Step-by-step explanation:

LCD of 4/x²t and x/t²

= LCM(x²t , t²)

= x²t²

Answer:

90 in^2

Step-by-step explanation:

Answer:

Step-by-step explanation:

to find out how much Angela she would have in the bank,

(600*3.6*1)100=21.60 she gains in one year

6 months  21.60/2=10.80

in 4.5 years

(21.60*4)+10.80=86.40+10.80=97.20 interest

the balance=600+97.20=697.20

In  2000, the population of bacteria reached 5 million, and it is projected to have 7.5 million in 2025. the value of a is 1.49.

A particular class of mathematical model used to explore population dynamics is called a population model.

P(x)  = C a ^ ( X - 2000)

C = 5m = 5(10⁶)

p( X ) = 5(10⁶) a ^ ( X - 2000)

7. 5 * 5(10^6) = 10 ^6 a^ 25

7. 5 = a ^ 5

 log 7.5 = 5 log a

  a =10 ^( log 7.5 / 5 )= 1.49

 P ( x ) =  ( 1.49m ) ^  ( X- 2000)

Models enable a better comprehension of the operation of intricate relationships and processes. Understanding how numbers change over time or in connection to one another may be made more manageable through the modelling of dynamic interactions in nature. Using population modelling as a technique allows for the detection of several trends.

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In  2000, the population of bacteria reached 5 million, and it is projected to have 7.5 million in 2025. the value of a is 1.49.

A particular class of mathematical model used to explore population dynamics is called a population model.

P(x)  = C a ^ ( X - 2000)

C = 5m = 5(10⁶)

p( X ) = 5(10⁶) a ^ ( X - 2000)

7. 5 * 5(10^6) = 10 ^6 a^ 25

7. 5 = a ^ 5

log 7.5 = 5 log a

 a =10 ^( log 7.5 / 5 )= 1.49

P ( x ) =  ( 1.49m ) ^  ( X- 2000)

Models enable a better comprehension of the operation of intricate relationships and processes. Understanding how numbers change over time or in connection to one another may be made more manageable through the modelling of dynamic interactions in nature. Using population modelling as a technique allows for the detection of several trends.

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So the question is just asking you to do 2^20 / 2^10 = 2^10 . So 2^10