If one lens increases the size of an image by 80% and another increases the size by 50% by what percent will the image be increased if the two lenses are used together?

Answer:

(0,0)

Step-by-step explanation:

(0, 3) + 4 = (0,7)

(0, 7) - 7 = (0,0)

Answer:

Therefore the value of [tex]x=31\°[/tex]

Step-by-step explanation:

Given:

m∠ A = 56°

m∠ B = 75°

m∠ ACD = x°

To Find:

x = ?

Solution:

In Δ ABC

An exterior angle of a triangle is equal to the sum of the opposite interior angles.

Here,

The opposite interior angles are angle A and angle B.

An exterior angle of a triangle is angle ACD which is x°

∴ [tex]m\angle A +m\angle B=m\angle ACD\\[/tex]...Exterior angle property of Δ

Substituting the values we get

[tex]56+75=x\\\\\therefore x=131\°[/tex]

Therefore the value of [tex]x=31\°[/tex]

Answer:

1 hour later , 21 pages read

Step-by-step explanation:

x hour later they will read the same number of pages

Tori: 16 + 5x

cora: 13 + 8x

16 + 5x = 13 + 8x

minus 5x each sides: 16 = 13 + 3x

minus 13 each sides: 3 = 3x

divide 3 each sides: x = 1

1 hour later both of them will read 16 + 5 x 1 = 21 pages

check cora: 13 + 8 x 1 = 21

Answer:

1 hour later , 21 pages read

Step-by-step explanation:

After 1 hour, Tori and Cora will have each completed 21 pages in their workbooks.

The value of f(5) is 49.1

Step-by-step explanation:

To find f(x) from f'(x) use the integration

f(x) = ∫ f'(x)

1. Find The integration of f'(x) with the constant term

2. Substitute x by 1 and f(x) by π to find the constant term

3. Write the differential function f(x) and substitute x by 5 to find f(5)

∵ f'(x) =  + 6

- Change the root to fraction power

∵  =

∴ f'(x) =  + 6

∴ f(x) = ∫  + 6

- In integration add the power by 1 and divide the coefficient by the

 new power and insert x with the constant term

∴ f(x) =  + 6x + c

- c is the constant of integration

∵

∴ f(x) =   + 6x + c

- To find c substitute x by 1 and f(x) by π

∴ π =   + 6(1) + c

∴ π =  + 6 + c

∴ π = 6.4 + c

- Subtract 6.4 from both sides

∴ c = - 3.2584

∴ f(x) =   + 6x - 3.2584

To find f(5) Substitute x by 5

∵ x = 5

∴ f(5) =   + 6(5) - 3.2584

∴ f(5) = 49.1

Answer:

  B, C

Step-by-step explanation:

The solution space is the area to the right of the X where the lines cross. Only points B and C are in that space. Point E is on the line, but the line is not included in the solution space.

_____

The lines are drawn as though the inequality were an equation. The solution space is above the first line (which has negative slope) because y > ... indicates the solution is values of y above (>) the line.

The solution space is below the second line, which has positive slope, because y < ... indicates the solution is values of y below (<) the line.

Answer:

18:1

Step-by-step explanation:

To convert inches to feet, we divide the value of inches by 12

Therefore, 6 inches=66/12=0.5 ft

The length of model = 0.5 ft

Length of actual car=9 ft

Ratio of actual car to model= 9:0.5=18:1

Therefore, the ratio is 18:1

Answer:

x = -2

y = 3

Step-by-step explanation:

Write the system the following way:

4x + 5y = 7

-3x +y  = 9

we need to eliminate one unknown by multiplying one equation for a suitable number in such a way that when we add the equations one unknown is eliminated.

If we multiply the second eq. by -5 the y is eliminated

4x + 5y = 7

15x -5y = -45

add the equations

19x = -38 ===> x = -38/19 ===> x = -2

Now replace this value in any equation to get y. For example, in 1st one.

4(-2) + 5y = 7 ===> -8 +5y = 7 ===> 5y = 7+8 ===> 5y = 15 ===> y = 15/5 ===>

y=3

There are 168 sweets altogether

Richard, Henry and Gavin share some sweets in the ratio 5 : 4 : 3

Let "5a" be the share of Richard

Let "4a" be the share of Henry

Let "3a" be the share of Gavin

Richard gets 70 sweets

share of Richard = 70

5a = 70

To find: number of sweets altogether

number of sweets altogether = share of richard + share of henry + share of gavin

number of sweets altogether = 5a + 4a + 3a

number of sweets altogether = 12a = 12(14) = 168

Thus there are 168 sweets altogether

Answer:

The domain is the interval [5,∞)

Step-by-step explanation:

we have

[tex]y = \sqrt{x-5}-1[/tex]

we know that

The radicand (number under a radical) must be greater than or equal to zero

so

[tex]x-5\geq 0[/tex]

solve for x

Adds 5 both sides

[tex]x-5+5\geq 0+5[/tex]

[tex]x\geq 5[/tex]

therefore

The domain is the interval [5,∞)

All real numbers greater than or equal to 5

Answer:

x >= 5

Step-by-step explanation:

Edge 2021

Answer:D

Step-by-step explanation:

Answer:

[tex]a=3.36 +0.816*0.18=3.507[/tex]

The value of height that separates the bottom 90% of data from the top 10% is 3.507.  

Step-by-step explanation:

1) Previous concepts

Normal 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".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

2) Solution to the problem

Let X the random variable that represent the grades of a population, and for this case we know the distribution for X is given by:

[tex]X \sim N(3.36,0.18)[/tex]  

Where [tex]\mu=3.36[/tex] and [tex]\sigma=0.18[/tex]

And the best way to solve this problem is using the normal standard distribution and the z score given by:

[tex]z=\frac{x-\mu}{\sigma}[/tex]

For this part we want to find a value a, such that we satisfy this condition:

[tex]P(X>a)=0.10[/tex]   (a)

[tex]P(X<a)=0.90[/tex]   (b)

Both conditions are equivalent on this case. We can use the z score again in order to find the value a.  

As we can see on the figure attached the z value that satisfy the condition with 0.90 of the area on the left and 0.10 of the area on the right it's z=0.816. On this case P(Z<0.816)=0.90 and P(Z>0.816)=0.1

If we use condition (b) from previous we have this:

[tex]P(X<a)=P(\frac{X-\mu}{\sigma}<\frac{a-\mu}{\sigma})=0.90[/tex]  

[tex]P(z<\frac{a-\mu}{\sigma})=0.90[/tex]

But we know which value of z satisfy the previous equation so then we can do this:

[tex]z=0.816=\frac{a-3.36}{0.18}[/tex]

And if we solve for a we got

[tex]a=3.36 +0.816*0.18=3.507[/tex]

So the value of height that separates the bottom 90% of data from the top 10% is 3.507.  

To find the minimum Undergraduate grade point average (UGPA) that would place a student in the top 10%, we use the Z-score corresponding to the top 10% (which is about 1.28) and apply it within the normal distribution parameters, mean (3.36) and standard deviation (.18). The result is a UGPA of approximately 3.59.

This question pertains to the concept of normal distribution in statistics. Given a mean of 3.36 and a standard deviation of .18, we're asked to find the minimum Undergraduate grade point average (UGPA) that would place a student in the top 10%. This requires the understanding of Z-scores (standard deviations away from the mean).

The Z-score that corresponds to the top 10% in a standard normal distribution is about 1.28 (this value comes from a standard Z-table or can be calculated using a statistical calculator). Remember that the Z-score formula is Z = (X - μ) / σ, where X is the value we're looking for, μ is the mean, and σ is the standard deviation.

So, rearranging the formula to solve for X gives X = Z*σ + μ. Substituting the known values into the equation gives: X = (1.28*.18) + 3.36, which gives X approximately equal to 3.59. Therefore, the minimum UGPA that will place a student in the top 10% is approximately 3.59.

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Answer:

Step-by-step explanation:

Dilation can be compared with zooming some image according to the given scale.

The vertices of VWXY is given by (-1, -1), (-1, 2), (2, -1), (2, 2) respectively.

Since the given scale is 4, to get the vertices of V'W'X'Y' we need to multiply the co-ordinates by 4.

The desired co-ordinates will be (-4, -4), (-4, 8), (8, -4), (8, 8) respectively.

Final answer:

The midpoint of the line segment with endpoints C(6,-8) and D(-4,10) is calculated to be at (1, 1) by averaging the x and y coordinates of the endpoints.

Explanation:

The midpoint of a line segment with endpoints C(6,-8) and D(-4,10) can be found by averaging the x-coordinates and the y-coordinates of the two endpoints. To do this, add together the x-coordinates, 6 and -4, and divide by 2 to find the x-coordinate of the midpoint. Add together the y-coordinates, -8 and 10, and divide by 2 to find the y-coordinate of the midpoint.

The calculations are as follows:
x-coordinate: (6 + (-4)) / 2 = 1
y-coordinate: (-8 + 10) / 2 = 1

Therefore, the midpoint of CD is (1, 1).

Answer:

225.5

Step-by-step explanation:

220 + (2.5% × 220) =

220 + 2.5% × 220 =

(1 + 2.5%) × 220 =

(100% + 2.5%) × 220 =

102.5% × 220 =

102.5 ÷ 100 × 220 =

102.5 × 220 ÷ 100 =

22,550 ÷ 100 =

225.5

Answer:

225.5

Step-by-step explanation:

So, you would start by doing

220 times 2.5% that would equal 5.5

Then you would add

220 + 5.5 = 225.5

Therefore your answer will be 225.5

Let...

1st number=x

2nd number=x+2

3rd number=x+4

4th number=x+6

x+x+2+x+4+x+6=200

4x=188

x=47

x+6=53

answer: 53

Answer:

Step-by-step explanation:

21% more then 5/11...

5/11 + 21% of 5/11 = 5/11 + 0.21(5/11) = 5/11 + (21/100 * 5/11) =

5/11 + 21/220 = 11/20 <===

Firstly, we converted the fraction 5/11 to its decimal equivalent, which is approximately 0.4545. Then, we calculated a number that is 121% of 0.4545 (because 21% more than the original number means we have to count the original number plus the additional 21%). The calculation gave us approximately 0.5499.

To answer this question, we can firstly calculate the equivalent decimal of 5/11. This can be done either by manual calculation or using a calculator. Dividing 5 by 11, we get approximately 0.4545.

Next, it's important to understand what the question is asking. When it asks what number is 21% more than a given number, it's essentially asking you to calculate a number that is 121% of the given number. Why? Because the original number (100%) plus the additional 21% gives you a total of 121%.

Once you know this, you simply multiply the given number (0.4545) by 1.21 (the decimal equivalent of 121%). And finally, multiplying 0.4545 by 1.21, we get approximately 0.5499. That is your final answer: The number that is 21% more than 5/11 is approximately 0.5499.

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Answer:

0.800 is the answer. If you want an explanation let me know.

Step-by-step explanation:

Answer:

Cost of each Computer is $225 and Cost of each Printer is $150.

Step-by-step explanation:

Let the cost of the Computers be 'x'.

Let the cost of Printer be 'y'.

Given:

If he buys three computers and one printer, the cost is $825.

framing in equation form we get;

[tex]3x+y =825 \ \ \ \ \ equation\ 1[/tex]

Also Given:

if he buys 4 computers and 2 printers, the cost is $1200.

framing in equation form we get;

[tex]4x+2y =1200 \ \ \ \ \ equation\ 2[/tex]

Now Multiplying equation 1 by 2 we get;

[tex]2(3x+y)=825\times 2\\\\6x+2y=1650 \ \ \ \ \ equation\ 3[/tex]

Now Subtracting equation 2 from equation 3 we get;

[tex](6x+2y)- (4x+2y) = 1650-1200\\\\6x+2y-4x-2y = 450\\\\2x=450\\\\x=\frac{450}{2} =\$225[/tex]

Now Substituting the value of x in equation 1 we get;

[tex]3x+y=825\\\\3\times 225+y=825\\\\675+y =825\\\\y = 825 -675\\\\y = \$150[/tex]

Hence Cost of each Computer is $225 and Cost of each Printer is $150.

Answer:

Cost of each Computer is $225 and Cost of each Printer is $150.

Answer:

d) $498.75

Step-by-step explanation:

Given:

Fixed expenses = $475

Expense raised by = 5%

We need to find updated Total Fixed Expenses.

Amount of expense raised is equal to Percentile expense raised multiply by Fixed expenses and then Divided by 100.

framing in equation form we get;

Amount of expense = [tex]\frac{5}{100}\times 475 = \$23.75[/tex]

Now Updated Total Fixed expense will be equal to sum of Fixed expenses and Amount of expense raised.

framing in equation form we get;

Updated Total Fixed expense = $475 + $23.75 = $498.75

Hence The updated Total fixed expenses will be $498.75.

Answer:498.75

Step-by-step explanation:

Hope it helped

Answer:

The salesperson will earn total commission of $ 445 .

Step-by-step explanation:

The salesperson gets 5% commission for first $2500, and 8% for above that.

So, for sale of $ 6500, the salesperson will earn commission,

$ [tex](2500 \times \frac {5}{100} + (6500 - 2500) \times \frac {8}{100})[/tex]

= $ [tex](125 + (4000) \times \frac {8}{100})[/tex]

= $ (125 + 320)

= $ 445

Answer:

AB = 5 units

Step-by-step explanation:

Given that:

So the the length in units of the line segment that connects vertex A and vertex B is the length of line AB. So we have the following formula:

AB = [tex]\sqrt{(x2-x1)^{2} + (y2-y1)^{2} }[/tex]

<=> AB = [tex]\sqrt{(1-1)^{2} +(4-(-1))^{2} }[/tex]

<=> AB = 5 units

Hope it will find you well.

The question relates to finding the distance between two points in a coordinate system. The length of the line segment connecting vertex A (1,-1) and vertex B (1,4) of the triangle ABC can be calculated using the distance formula, which yields a result of 5 units.

The subject of your question is geometry, specifically the concept of distance between two points in a coordinate system. In finding the length of the line segment that connects vertex A (1,-1) and vertex B (1,4), you can use the distance formula based on Pythagorean theorem.

The distance formula is d = sqrt [(x2 - x1)² + (y2 - y1)²]. In this case, x1 = 1, x2 = 1, y1 = -1 and y2 = 4.

Substituting these values, we have d = sqrt [(1 - 1)² + (4 - (-1))²] = sqrt [0 + 25], hence d = sqrt [25] = 5 units.

Therefore, the length of the line segment connecting vertex A (1, -1) and vertex B (1, 4) is 5 units.

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Answer:

xy = 1

Step-by-step explanation:

Given

[tex]x+y=\dfrac{1}{x}+\dfrac{1}{y}\\ \\x+y\neq 0[/tex]

Simplify the first expression:

[tex]x+y=\dfrac{1}{x}+\dfrac{1}{y}\\ \\x+y=\dfrac{y+x}{xy}\ [\text{Add fractions in the left side}]\\ \\1=\dfrac{1}{xy}\ [\text{Divide by }x+y \ (\text{it can be done since})\ x+y\neq 0]\\ \\xy=1\ [\text{Cross multiply}][/tex]

Answer:

Step-by-step explanation:

Given that the percentage of physicians who are women is 27.9%. In a survey of physicians employed by a large  university health system,

45 of 120 randomly selected physicians were women.

Sample size n = 120

Sample proportion p = [tex]\frac{45}{120} \\=0.375[/tex]

H0: p = 0.279

Ha: p >0.279

(Two tailed test at 5% significance level)

p difference = 0.096

STd error of p assuming H0 true

= [tex]\sqrt{\frac{pq}{n} } \\=\sqrt{\frac{0.279(0.721}{120} } \\=0.041[/tex]

Test statistic Z = [tex]\frac{0.096}{0.041} \\=2.345[/tex]

Z critical value one tailed is 1.645

Since Z statistic > 1.645 we reject H0

There is evidence to conclude that the proportion of women physicians at the university health system exceeds

27.9%

Answer:

A) 0.15

Step-by-step explanation:

Because 15/20=75/100=75%=0.75.

1520 is the value that is not equivalent to the other three options.

Option B is the correct answer.

We have,

To determine which option is not equivalent to the other three, we can analyze the given values.

A: 0.15

B: 1520

C: 75%

D: 0.75

Option B (1520) stands out as it does not share the same numerical pattern or representation as the other options.

Options A, C, and D are all related to each other as they represent the same value, albeit in different formats.

Option A (0.15) can be converted to a percentage as 15%.

0.15 x 100 = 15%.

Option C (75%) represents 75 out of 100, which is equivalent to 0.75 as a decimal or 75% as a percentage.

Option D (0.75) is the decimal representation of 75%, or 75 out of 100.

Therefore,

1520 is the value that is not equivalent to the other three options.

Learn more about expressions here:

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Answer:

Area = 26(10) + 5(3) + 5(4)

= 260 + 15 + 20

= 295 ft²

Answer:

(5,1)

Step-by-step explanation:

A vertex is where two or more curves, lines, or edges meet

Hey there!

First, set up an exponential equation that represents the rate at which your original amount, 1000, gains interest:

y = 1000(1.24)^x

Y represents the value after X years. 1.24 represents the rate at which the money gains interest, 1 + 0.24 (your 24% interest rate in decimal form). 1000 is your original amount.

Now, set this equation equal to 64000, graph y = 64000 and y = 1000(1.24)^x on a graphing calculator, and see where the two equations intersect in order to solve for x.

They intersect when x is about 19.334, as seen in the graph below (it is very zoomed in so that you can see where the two functions intersect). Therefore, it will be about 19 years after the year in which you deposited the 1000 dollars before the money is worth 64000 dollars.

Answer: about 1

Step-by-step explanation:

Bc 1 mil minutes are 1.902 of a year

Answer:

(3,-8)

(2,-10)

Step-by-step explanation:

we have

[tex]10x + 4y < 12[/tex] ----> inequality A

[tex]8x- 3y > 20[/tex] ----> inequality B

we know that

If a point is a solution of the system of inequalities, then the point must satisfy both inequalities (makes true both inequalities)

Verify  all the points

Substitute the value of x and the value of y of each point in both inequalities  

Case 1) point (3,-8)    

For x=3, y=-8

inequality A

[tex]10(3) + 4(-8) < 12[/tex]

[tex]-2 < 12[/tex] ----> is true

inequality B

[tex]8(3)- 3(-8) > 20[/tex]

[tex]48 > 20[/tex] ---> is true

therefore

The point is a solution of the system of linear inequalities

Case 2) point (2,5)    

For x=2, y=5

inequality A

[tex]10(2) + 4(5) < 12[/tex]

[tex]40 < 12[/tex] ----> is not true

therefore

The point is not a solution of the system of linear inequalities

Case 3) point (-5,1)    

For x=-5, y=1

inequality A

[tex]10(-5) + 4(1) < 12[/tex]

[tex]-46 < 12[/tex] ----> is true

inequality B

[tex]8(-5)- 3(1) > 20[/tex]

[tex]-43 > 20[/tex] ---> is not true

therefore

The point is not a solution of the system of linear inequalities

Case 4) point (10,3)    

For x=10, y=3

inequality A

[tex]10(10) + 4(3) < 12[/tex]

[tex]112 < 12[/tex] ----> is not true

therefore

The point is not a solution of the system of linear inequalities

Case 5) point (2,-10)    

For x=2, y=-10

inequality A

[tex]10(2) + 4(-10) < 12[/tex]

[tex]-20 < 12[/tex] ----> is true

inequality B

[tex]8(2)- 3(-10) > 20[/tex]

[tex]46 > 20[/tex] ---> is true

therefore

The point is a solution of the system of linear inequalities

see the attached figure to better understand the problem

If a ordered pair is a solution of the system , then the ordered pair must lie in the shaded area of the solution set

Answer:

(3,-8)(2,-10)

Step-by-step explanation:

Answer:

Total bikes and cars are 260

Step-by-step explanation:

Cars: [tex]n_{cars}185[/tex]

Bikes: [tex]n_{bikes}=n_{cars}-113=72[/tex]

Total: [tex]n_{total}=n_{bikes}+n_{cars}=257[/tex]

Rounding to the nearest ten: 260