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please help I need an answer quick

By taking some products, we can see that if both of them work for 20 hours each, they will earn a total of 184 dollars.

After a small search online I found that we want to find how much will they earn (together) if both of them work for 20 hours.

We know that Carlos earns $44.55 in 9 hours, then the amount that he wins per hour is:

C = $44.55/9h

In 20 hours he will earn 20 times that, so the amount that Carlos earns in 20 hours is given by the product:

Carlos = 20h*($44.55/9h )

Similarly, Maggie earns per hour:

M = ($51/12h)

And in 20 hours, she will win:

Maggie = 20h*($51/12h)

The total amount that they earn together is:

20h*($44.55/9h ) +  20h*($51/12h) = $184.

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Answer:

The ratio of girls to total students is 12:30, which can be simplified to 2:5.

Step-by-step explanation:

You can express the ratio in different ways by using the same numbers, for example, you could say that for every 2 girls, there are 5 total students, or that for every 5 total students, 2 of them are girls.

Answer:

3 hours and 45 minutes

Step-by-step explanation:

ggggggggggggg

1. True (The center of dilation lies on the segment)

2. False (The center of dilation does not line on the segment)

3. False (The center of dilation lies on the segment)

4. True (Since the segments are not collinear as a result of the dilation, they are parallel)

5. True (Scale factor is 2)

6. False (Scale factor is 2)

7. True (by definition)

8. True (by definition)

Answer:

Step-by-step explanation:

So bill haves 12 quarters and 3 dimes

a) The mean number of website searches differs between the day and evening advertisements based on this hypothesis:

[tex]H_{0} :[/tex] μ[tex]_{x}[/tex]-μ[tex]_{y}[/tex] = 0

[tex]H_{a} :[/tex] μ[tex]_{x}[/tex]-μ[tex]_{y}[/tex] ≠ 0

The null hypothesis in the question states that the mean number of website searches does not differ between the day and evening advertisements and the alternative hypothesis states that the mean number of website searches differs between the day and evening advertisements. It can be written as:

[tex]H_{0} :[/tex] μ[tex]_{x}[/tex]-μ[tex]_{y}[/tex] = 0

[tex]H_{a} :[/tex] μ[tex]_{x}[/tex]-μ[tex]_{y}[/tex] ≠ 0

b-1) From the below excel output screenshot the t-test statistical value is I -0.3476.

b-2) From the below excel output the critical t value comes as 2.0017. So, the rejection region includes all the values greater than 2.0017 and less than -2.0017.

c) The calculated t-statistic value is not falling in the rejection region. So we do not reject the null hypothesis.

Do not reject [tex]H_{0}[/tex]. At the 5% significance level, we conclude the mean number of website searches not differ between the day and evening advertisements.

(The below excel screenshot shows the customized formula and the output which is required to find the values required to test the hypothesis.)

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Answer: 4) 3x²-14x+14

Explanation:

Use the binomial theorem (a−b)² = a² - 2ab + b² to expand (x-2)².

Use the distributive property to multiply 3 by x²-4x+4.

Use the distributive property to multiply −2 by x−1.

Combine −12x and −2x to get −14x.

Add 12 and 2 to get 14.

It is 3x²+14x+14, the trinomial equivalent to 3(x-2)²-2(x-1). OPTION 4.

Answer:

To solve this problem, we can set up a system of two equations to represent the given information:Let A be the cost of an apple and B be the cost of a banana.Then the first equation is: 4A + 3B = 4.48

The second equation is: 3A + 4B = 4.76To find the values of A and B, we can solve this system of equations using substitution or elimination.Using substitution, we can solve for A in the first equation and substitute that expression into the second equation:4A + 3B = 4.48

A = (4.48 - 3B)/4Substituting this expression for A into the second equation gives:3((4.48 - 3B)/4) + 4B = 4.76

3(4.48 - 3B) + 4B = 4.76

13.44 - 9B + 4B = 4.76

4.44 - 5B = 4.76

-5B = -0.32

B = 0.064Now that we have found the value of B, we can substitute it back into the first equation to find the value of A:4A + 3(0.064) = 4.48

4A + 0.192 = 4.48

4A = 4.288

A = 1.072Therefore, the cost of an apple is £1.072 and the cost of a banana is £0.064.

Step-by-step explanation:

Answer:

The answer is below

You must use the t-distribution table when working problems when the population standard deviation (σ) is not known and the sample size is small (n<30). General Correct Rule: If σ is not known, then using t-distribution is correct. If σ is known, then using the normal distribution is correct.

Normal distribution, also known as the Gaussian distribution, is a probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.

In graphical form, the normal distribution appears as a "bell curve".

The normal distribution is the proper term for a probability bell curve.

In a normal distribution the mean is zero and the standard deviation is1. It has zero skew and a kurtosis of 3.

Normal distributions are symmetrical, but not all symmetrical distributions are normal.

The t-distribution describes the standardized distances of sample means to the population mean when the population standard deviation is not known, and the observations come from a normally distributed population.

Therefore,

You must use the t-distribution table when working problems when the population standard deviation (σ) is not known and the sample size is small (n<30). General Correct Rule: If σ is not known, then using t-distribution is correct. If σ is known, then using the normal distribution is correct.

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The sum of all interior angles of a 28-sided regular polygon is 4680°.

What is a polygon ?

The definition of a polygon is a closed, two-dimensional, plane shape created by connecting three or more line segments. During our study of geometry, polygons are a common sight.

Poly, which means "many," and gon, which means "angle," make up the Greek word "Polygon." Polygons of many kinds can be seen all around us. For instance, a honeycomb is shaped like a hexagon.

An n-sided polygon's inner angle measurements added together equal to (n-2)180°. As a result, for a polygon of 28 sides, the sum of the interior angle measurements is 26(180°) = 4680°.

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Answer:

b) 4,680

Step-by-step explanation:

hope this helps

Answer:

20o

Step-by-step explanation:

Angle sum property of triangle states that the sum of interior angles of a triangle is 180o.

so 25 + 135 + ? = 180

? = 180 - 25 - 135

? = 20

The values of x in the equation are (a) x = 13 and (b) x = 1

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

(x - 7)2 = 36

This equation when expressed properly is

(x - 7)² = 36

Take the square roots of both sides of the equation

So, we have the following representation

x - 7 = ±6

Add 7 to both sides of the equation

This gives

x = 7 ± 6

Evaluate the sum and the difference

x = 1 and 13

Hence, the solutions are (a) and (b)

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The probability that hugo will solve rubik's cube in less than 8 minutes is 0.4375.

We have given that,

the amount of time it takes hugo to solve a rubik's cube is continuous and uniformly distributed between 4.5 minutes and 12.5 minutes.

i.e. a = 4.5 and b = 12.5

The probability that we find a value of X lower than x is given by the f

P(X < x) = [tex]\frac{x-a}{b-a}[/tex]

We have to find probability that it takes hugo less than 8 minutes to solve rubik's cube.

Therefore

P(X < 8) =  [tex]\frac{8-4.5}{12.5-4.5}[/tex]

             = [tex]\frac{3.5}{8}[/tex]

P(X < 8) = 0.4375

Hence the probability that it takes hugo less than 8 minutes to solve a rubik's cube is 0.4375%.

The uniform continuous distribution is one of the simplest probability distributions in statistics. Is is a continuous distribution, this means that it takes values within a specified range. A continuous uniform distribution takes values in a range [a,b].

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The possible value of 3rd side is x ≤  35.

What is a triangle?

A polygon with three edges and three vertices is called a triangle. It is one of the fundamental geometric shapes. Triangle ABC is the designation for a triangle with vertices A, B, and C. In Euclidean geometry, any three points that are not collinear produce a distinct triangle and a distinct plane.

Given that the length of two sides of a triangle are 20 and 15.

Triangle inequality theorem:

The sum of two sides of a triangle is always greater than the third side.

The of two sides of the triangle is (20 + 15) = 35.

According to triangle inequality theorem,

The third side of the triangle must be less than 35.

Assume that the length of the third side is x.

Therefore, x ≤  35.

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Given that ABCD is a rhombus, the value of x is 29. Option A

A rhombus is a parallelogram having four equal sides and, occasionally, one without any right angles.

A rhombus's diagonals are perpendicular to each other.

sum the equation to 180

x + 3x -26 + 90 = 180

4x = 180 - 90 + 26

4x = 116

We have to divide through the equation by 4 in order to get the value of x

4x / 4  = 116 / 4

x = 29

Hence the value of x in the given rhombus is 29

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Answer:29 is the answer

Step-by-step explanation:

Since the probability is 33% which is less than 47% as claimed by the basketball player, it can be concluded that there is convincing evidence that she is less than a 47% shooter.

It is given to us that -

A basketball player claims to make 47% of her shots from the field

The player takes sets of 10 shots

Assuming that her claim is true, a total of 25 repetitions of a simulation were performed

The number of makes in each set of 10 simulated shots was recorded on the dot plot

We have to suppose this player attempts 10 shots in a game and makes only 3 of them.

For the simulation of the player taking sets of 10 shots, we have to determine if we have enough convincing evidence that she is less than a 47% shooter.

From the given information, the approximate probability of finding out that a 47% shooter makes only 3 of the 10 attempted shots can be determined as -

P (x = 3) = 3/10 = 0.33 = 33%

Since the probability is 33% which is less than 47% as claimed by the basketball player, it can be concluded that there is convincing evidence that she is less than a 47% shooter.

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According to the test 0 is not plausible value for the difference between the population means.

What is population mean?

There are various mean types in mathematics, particularly in statistics. Each mean serves to summarize a specific set of data, frequently to help determine the overall significance of a specific data set.

We have

n1 = 504,  x f = 3.13

n2 = 400,  x m = 2.87

(a) Hypothesis: H0: μf = μm   V/s  H1: μf ≠ μm

Yes, because according to the test 0 is not plausible value for the difference between the population means.

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Complete question:

Complete question is attached below.

There are 3 dimes and 12 nickels

Two or more expressions with an Equal sign is called as Equation.

Given,

let x = the number of dimes

then  4x = the number of nickels =y

0.05(4x) = the value of the nickels

0.10x = the value of the dimes

Since the total value of the coins is $0.90 we can write the equation:

0.05(4x) + 0.1x = 0.90

0.2x + 0.1x = 0.90

0.3x = 0.90

Divide both sides by 0.3

x = 3

Hence, there are 3 dimes and 12 nickels

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Answer:

-7/15

Step-by-step explanation:

-3$8(47#+$'++#$)3!_+$7$jrjdjd

Answer:

- 7/15

Step-by-step explanation:

Must convert to a common denominator to add or subtract fractions

I'll use 30

8/6 = 40/30

-9/5 = -54/30

(40-54) /30 = -14/30 =  - 7/15

Answer:

[-4,2] is the range

Step-by-step explanation:

A parent function of sine is known to have range of -A ≤ y ≤ A where A stands for amplitude.

Therefore, we would have the range:

[tex] \displaystyle{ - 3 \leqslant g(x) \leqslant 3}[/tex]

But since there's a vertical shift of -1, we have to subtract -1 from both -3 and 3.

[tex] \displaystyle{ - 4 \leqslant g(x) \leqslant 2}[/tex]

Therefore, the range of function is [-4,2]

I think that for a its 1.12 and for b its 39424

100 + 12 = 112
112/100 = 1.12

35200 * 1.12 = 39424

Answer:

An apple costs 0.30 pounds and a banana costs 0.40 pounds.

Step-by-step explanation:

Let's think of apples as x and bananas as y.

Using the given information, you can write two equations.

[tex]x+6y=2.70[/tex]

[tex]x+8y=3.50[/tex]

x can also be written as

[tex]x=2.70-6y[/tex]

We can plug this equation into the second one to solve for y, or the cost of a banana.

[tex](2.70-6y)+8y=3.50[/tex]

[tex]2y=0.8[/tex]

[tex]y=0.4[/tex]

Now that we know the cost of a banana, we can go back to the first equation and solve for x, or the cost of an apple.

[tex]x+6(0.4)=2.70[/tex]

[tex]x=0.30[/tex]

Therefore, an apple costs 0.30 pounds and a banana costs 0.40 pounds.

5 Trumpets

10 Trumpets

8 Trombones

6 Trombones for 15 Trumpets

The area of the curved surface of the dryer is 11.775m

The three-dimensional form of a cylinder is made up of two parallel circular bases connected by a curving surface. The right cylinder is created when the centers of the circular bases cross each other. The axis, which represents the height of the cylinder, is the line segment that connects the two centers.

A cylinder is a three-dimensional solid object with two bases that are identically circular and are connected by a curving surface that is located at a certain height from the center. Real-world examples of cylinders are toilet paper rolls and cold beverage cans.

We know, the formula for curved surface of cylinder is 2pirh

putting the desired value in the equation we get

11.775m

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On solving the given question, by the equation, A riding 48 mi at 8 mph takes 6 hours, which indeed is 3 hours longer .A riding 48 mi at 8 mph takes 6 hours, which indeed is 3 hours longer.

An equation is a mathematical statement that proves two mathematical expressions are equal in algebra, and this is how it is most commonly used. In the equation 3x + 5 = 14, for instance, the two expressions 3x + 5 and 14 are separated by the symbol "equal."

J can ride his bike 8 mph faster than A can ride. It takes A 3 hours longer than J to ride 48 miles. How fast can J ride?

Let r = rate that J rides, in miles per hour.

Then rate that A rides is (r – 8).

distance = rate * time

time = distance/rate

Time taken by J to ride 48 miles = 48/r.

Time taken by A to ride 48 miles = 48/(r – 8).

But A's time is 3 hours more than J's time.

48/(r – 8) = 3 + 48/r

Solve that for r.

48/(r – 8) = 3r/r + 48/r

48/(r – 8) = (3r + 48)/r

Multiply both sides by (r – 8)r.

[tex]48(r) = (3r + 48)(r - 8)\\ 48r = 3r2 -24r + 48r -384\\ 0 = 3r2 - 24r -384\\ 0 = r2 -8r - 128\\ 0 = (r -16)(r + 8)[/tex]

So r = 16 mph or r = –8 mph.

J riding 48 mi at 16 mph takes 3 hours.

A riding 48 mi at 8 mph takes 6 hours, which indeed is 3 hours longer.

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Answer: AB≈7.62 units

Step-by-step explanation:

A(-3,4)      B(4,7)

[tex]\boxed {L=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2} }\\\\x_1=-3\ \ \ \ x_2=4\ \ \ \ y_1=4\ \ \ \ y_2=7[/tex]

Hence,

[tex]AB=\sqrt{(4-(-3))^2+(7-4)^2} \\\\AB=\sqrt{(4+3)^2+3^2} \\\\AB=\sqrt{7^2+9} \\\\AB=\sqrt{49+9} \\\\AB=\sqrt{58} \\\\AB\approx7.62\ units[/tex]

The slope of the line of image 1 is 2

The slope of the line of image 2 is 5/2

The slope of the line of image 3 is 2/5.

The same number is given for every two different points on the same line when the ratio is stated as a quotient ("rise over run"). On a falling line, there is a negative "rise." In a diagram that depicts a roof or a road as a description or a design, the line may be practical as established by a road surveyor.

The slope of the line of image 1 is:

The line is passing through the points (6, 10 and (2, 2)

So,

Slope=(y₂-y₁)/(x₂-x₁)

m=(2-10)/(2-6)

m=8/4

m=2

Therefore, the slope of the line for image 1 is 2.

Hence, option A is correct.

The slope of the line for image 2 is:

The line is passing through the points (3, 4) and (7, 14)

Slope=(y₂-y₁)/(x₂-x₁)

m=(14-4)/(7-3)

m=10/4

Therefore, the slope of the line for the image 2 is 5/2.

Hence, option F is correct.

The slope of the line for image 3 is:

The line is passing through the points (2, 1) and (7, 3)

Slope=(y₂-y₁)/(x₂-x₁)

m=(3-1)/(7-2)

m=2/5

Therefore, the slope of the line for the image 3 is 2/5

Therefore, option D is correct.

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Answer:  -72·a^8·b^9

Step-by-step explanation:

(-8·a^6·b³)(9·a²·b^6)

combine all the like terms:

-72·a^8·b^9

The most appropriate test to use the given situation is option (B) two sample z test

Total number of alumni were surveyed = 1046

Number of alumni attempted at least one class reunion = 653

Similarly, in public university, 791 out of 1327 sampled alumni claimed they have attended at least one class reunion.

The two sample z test is used to compare the means of two samples to see if it is feasible that they come from the same population.

The difference in the sample proportion is statistically significant

Therefore, the correct test for the situation is option (B) two sample z test

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