why is nobody helping me pls help me​

Answer:

1.18 times 10 Superscript negative 4 YW

Step-by-step explanation:

Answer: D

Step-by-step explanation:

Answer:

33

Step-by-step explanation:

The statement "in trend projection, a negative regression slope is mathematically impossible" is false.

In trend projection, a negative regression slope is mathematically possible. Trend projection, also known as linear regression, is a statistical technique used to forecast future values based on past trends. It assumes a linear relationship between the independent variable (time) and the dependent variable (the variable being forecasted).

The regression slope represents the direction and magnitude of the relationship between the variables. A positive slope indicates an upward trend, while a negative slope indicates a downward trend. Therefore, a negative regression slope is indeed possible in trend projection.

However, it's important to note that the validity of the trend projection depends on the underlying data and assumptions made. If the data and assumptions are not appropriate, the trend projection may not accurately represent the relationship between the variables.

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Answer:

B

Step-by-step explanation:

If you think of it as a graph the y intercept is -430, meaning that after 0 minutes it's at -430 (it started at -430).

Because you multiply the number of minutes by 38, that means it ascends by 38 meters every minute.

Answer:

25

Step-by-step explanation:

The factors of 15625 are = 5 * 5 * 5 * 5 * 5 * 5. =25 * 25 * 25 Þ the cube root of 15625 is 25.

Answer: 90 degrees.

Step-by-step explanation:

Step 1: The smallest angle must be 90/2 = 45 degrees.

Step 2: The largest angle is twice the size of the smallest angle, so it is 90 degrees.

Answer:

Step-by-step explanation:

12 ≤ t ≤ 25

t ≤ 13 miles

Answer:

4

Step-by-step explanation:

1/2 ×base ×height =40

1/2 × (x+4) × x=40

(x+4) + x =80(40×2)

x×x + 4x =80

x×x + x =80/4

x×x +x =20

x=4

hope it helps....plz mark me brainliest :)

The value of x in for the triangle having an area of 40 units is 71.6 units.

A triangle is a three-sided closed-plane figure form by joining three noncolinear points. Based on the side property triangles are of three types they are Equilateral triangle, Scalene triangle, and Isosceles triangle.

We know area of a triangle is (1/2)×base×height.

Therefore, The area of the rectangle with a base of 'x+4' units and height of 'x' units is,

(1/2)×(x+4)×x.

Given, Area is 40.

Therefore,

(1/2)×(x+4)×x = 40.

x² + 4x = 80.

x² + 4x - 80 = 0.

Solving the quadratic we get, x = 7.16 units.

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The radius of the circle, to the nearest tenth, is approximately 4.8 units. An angle measuring 8.9 radians intercepts an arc of length 42.2 units.

To find the radius of the circle, we can use the formula relating the angle, arc length, and radius in a circle. The formula is:

Arc length = radius × angle

In this case, we are given that the angle measures 8.9 radians and the arc length is 42.2 units. Plugging these values into the formula, we get:

42.2 = radius × 8.9

To find the radius, we can isolate it by dividing both sides of the equation by 8.9:

radius = 42.2 / 8.9 ≈ 4.74

Rounding to the nearest tenth, the radius of the circle is approximately 4.8 units.

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Answer:

79

Step-by-step explanation:

Since the two lines are parralel, then the angles should be the same.

Answer:

79 degrees for sure

Step-by-step explanation:

this is because im pretty sure its right.

both angles look same to me trust me

pls mark braineslt if im right

Answer: There are a few different ways to approach this problem, but one common method is to use the complement rule, which states that the probability of an event happening is equal to 1 minus the probability of the event not happening. In this case, we want to find the probability of at least one psychologist being chosen, which is the same as 1 minus the probability of no psychologists being chosen.

To find the probability of no psychologists being chosen, we first need to calculate the total number of ways to choose 3 people from a group of 54, which is:

54 choose 3 = 54! / (3! * 51!) = 19,958

Then we need to find the number of ways to choose 3 psychiatrists from a group of 24, which is:

24 choose 3 = 24! / (3! * 21!) = 1,344

Now, we can use these values to calculate the probability of no psychologists being chosen:

P(no psychologists) = (24 choose 3) / (54 choose 3) = 1,344 / 19,958 = 0.067 or 6.7%

Finally, we can use the complement rule to find the probability of at least one psychologist being chosen:

P(at least one psychologist) = 1 - P(no psychologists) = 1 - 0.067 = 0.93 or 93%

So the probability that at least one psychologist is chosen from the conference is 93%

Step-by-step explanation:

Answer:

I think it's positive

Step-by-step explanation: sorry if i'm wrong tho

The translation that would yield the identity transformation is S(x, y) = ( x - 2, y + 5)

We know that an identity transformation is a linear transformation defined as defined by T(→x)=→(x)  for all →x

Here, T(x, y) = (x + 2, y + 5)

So, the identity transformation I = S(T(x, y)) would allow a data (x, y) to remain the same after the transformation T(x, y)

For S(x, y) = ( x - 2, y + 5), we have,

S(T(x, y)) = S(x + 2, y + 5)

               = (x + 2 - 2, y + 5 - 5)

               = (x, y)

Therefore, the translation S(x, y) that would yield the identity transformation, I = ST(x, y) which is S(x, y) = ( x - 2, y + 5).

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The complete question is:

Given T(x, y)=(x+2, y+5), state the translation S(x, y) that would yield the identity transformation, I=S(T(x,y)).

Answer:

Step-by-step explanation:

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I need credits

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(a) The signal x[n] = e^(2πn/5) is periodic with a period of 5.

(b) The signal x[n] = sin(19πn) is periodic with a period of 2.

Signal (x[n]) is periodic if there exists a positive integer N such that x[n + N] = x[n] for all n.

In other words, if the signal repeats itself after a certain number of samples, it is periodic. (a) x[n] = e^(2πn/5)

To determine if this signal is periodic, we need to find a positive integer N such that x[n + N] = x[n] for all n.

Let's substitute n + N into the equation: x[n + N] = e^(2π(n + N)/5) To check if this is equal to x[n], we need to simplify it using properties of exponential functions: e^(2π(n + N)/5) = e^(2πn/5) * e^(2πN/5)

Therefore, the period of signal (b) is 2, because x[n] = x[n + 2] for all n.

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The area of the playground will be 1,654 square yards. Thus, the correct option is A.

The area of a two-dimensional figure is the area that its perimeter encloses. The quantity of unit squares that occupy a closed figure's surface is its region.

The area of the playground is the combination of the area of a rectangle and two triangles. Then the area of the playground is calculated as,

A = 25 x 45 + 1/2 x 12 x 45 + 1/2 x 14 x (12 + 25)

A = 1,125 + 270 + 259

A = 1,654 square yards

Thus, the correct option is A.

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Answer:

(2x ^2  −x+3)(x+1)

Step-by-step explanation:

All you needed to do was factor out the problem.

The markers identified when identifying significant digits include:

Significant digits in mathematics refers to digits that  are meaningful in mathematical calculations. This implies that their position and the quantity alters the value of the number. The particular digit and the position determines whether the digit is significant or not.

Instances of digits with their locations that are significant are:

These instances results to significant digits while the instances below the digits are insignificant:

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Answer:

11:27 am.

Step-by-step explanation:

The time which has passed when Tom overtakes Hazel is after Hazel has walked 1 hr 15 minutes and in that time Hazel has walked

1.25 * 4.8

= 6 km.

So, Tom runs 6 km in 10:15 - 9.39 = 36 minutes

= 0.6 hrs.

So, Tom's speed is 6/0.6 = 10 km/hr.

,

and Tom will take 18/10 = 1.8 hours to finish the route,

= 1 hr 48 minutes

So he finishes the route at

9:39 + 1:48

= 11:27 am.

Answer:

its 65

Step-by-step explanation:

welcome girl

Answer:

  see attached

Step-by-step explanation:

Rotation 180° about the origin is equivalent to reflection across the origin. Effectively, every coordinate changes sign.

  (x, y) ⇒ (-x, -y) . . . . rotation 180°

__

Additional comment

There are numerous approaches to making the plot of the reflected image. We chose to plot one point, then develop the rotated image by plotting other points in their proper relative position.

There are geometry programs and apps that can reflect a figure across any point you might choose. They will also do the rotation, if you find that simpler.

You can, of course, compute the values of each of the rotated coordinates, and then plot the points at their new location. We judge that to be the most work of all. YMMV

Answer:

  12.68

Step-by-step explanation:

The relevant trig relation is ...

  Sin = Opposite/Hypotenuse

In this instance, we have ...

  sin(25°) = x/30

  x = 30·sin(25°)

  x ≈ 12.68

Considering it's own equation, the circumference of the circle will be increased by a factor of 7.

The circumference of a circle of radius r is:

\(C = 2\pi r\)

Since the radius is elevated to power 1, if it is multiplied by a factor of 7, the circumference of the circle will also be increased by a factor of 7.

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f(n) = ϴ(g(n)) is not true in cases B(sqrt(n)log(n), C(\(3^n 5^n\)), and D(sin(n)+3 cos(n)+1).

A) \(log(n^200) log(n^2)\)

Here, f(n) = \(log(n^200)\) and g(n) = \(log(n^2)\). Now, if we take the limit of f(n) / g(n) as n approaches infinity, then:

f(n) / g(n) = \([log(n^200) / log(n^2)]\) = 100

This means that as n approaches infinity, the ratio f(n) / g(n) is constant, and so we can say that f(n) = ϴ(g(n)). Therefore, f(n) = ϴ(g(n)) is true in this case.

B) sqrt(n) log(n) Here, f(n) = sqrt(n) and g(n) = log(n). Now, if we take the limit of f(n) / g(n) as n approaches infinity, then:

f(n) / g(n) = [sqrt(n) / log(n)]

As log(n) grows much slower than sqrt(n) as n approaches infinity, this limit approaches infinity. Therefore, we cannot say that f(n) = ϴ(g(n)) is true in this case.

C) 3^n 5^n

Here, f(n) = \(3^n\) and g(n) = \(5^n\) . Now, if we take the limit of f(n) / g(n) as n approaches infinity, then:

f(n) / g(n) = \([3^n / 5^n]\)

As \(3^n\) grows much slower than \(5^n\) as n approaches infinity, this limit approaches zero. Therefore, we cannot say that f(n) = ϴ(g(n)) is true in this case.

D) sin(n) + 3 cos(n) + 1

Here, f(n) = sin(n) + 3 and g(n) = cos(n) + 1. Now, if we take the limit of f(n) / g(n) as n approaches infinity, then:

f(n) / g(n) = [sin(n) + 3] / [cos(n) + 1]

As this limit oscillates between positive and negative infinity as n approaches infinity, we cannot say that f(n) = ϴ(g(n)) is true in this case.

Therefore, f(n) = ϴ(g(n)) is not true in cases B, C, and D.

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Answer:

Tommy's band won 5 awards, Ali's band won 8 awards and Jack's band won 10 awards.

Step-by-step explanation:

Let the number of awards Tommy won be x.

Number of awards Ali won -> x+3

Number of awards Jack won -> 2x

\(x+x+3+2x=23\)

\(4x+3=23\)

Subtract 3 from both sides:

\(4x+3-3=23-3\)

\(4x=20\)

Divide both sides by 4:

\(\frac{4x}{4}=\frac{20}{4}\)

\(x=5\) (Tommy)

\(5+3=8\) (Ali)

\(5\times2=10\) (Jack)

Answer: Tommy won 5 awards. Ali won 8 awards. Jack won 10 awards.

Step-by-step explanation:

First give each person a variable:

Tommy = y

Ali = a

Jack = x

Then figure out the equations:

Tommy won 3 less awards than Ali, so the equation would be (y = a - 3).

Jack won twice as many awards as Tommy, so the equation would be (x = 2y)

All three won a total of 23, so that would be (23 = y + x + a)

Next, plug in (2y) into the (x) of (23 = y + x + a)

This would result in (23 = 3y + a)

Then you would plug in (a - 3) into (y)

This would result in (23 = 4a - 9)

Solve for a: (a = 8)

Now that you know (a = 8), plug that into the first equation (y = a - 3) to find (y).

Answer: (y = 5)

Use (y = 5) and plug it into the second equation (x = 2y) to find (x)

Answer: (x = 10)

Answers:

a = 8

y = 5

x = 10

The values of p and q are 3 and 2.

Given:

The equation of the graph is y = pq^x where p and q are positive constants.

From the graph:

curve linear course points are:

(0,3) and (1,6)

substitute points in y = pq^x

3 = pq^0

3 = p*1

p = 3

y = pq^x

6 = pq^1

6 = p*q

6 = 3*q

divide by 3 on both sides

6/3 = 1

q = 2

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Answer:

c. plane

Step-by-step explanation:

There are three terms generally considered to be undefined in geometry:- Point, Line, Plane.

A circle is the set of all points in a plane the same distance from a given points (i.e center of the circle)