What percent of 20 is 11

QUESTION POSTED AT 14/12/2019 - 05:12 PM

Answered by admin AT 14/12/2019 - 05:12 PM

'is' in mathematics means equal
'of' in mathematics means multiplication

\frac{x}{100} \times 20 = 11\\\\\frac{x}{5} = 11\\\\\boxed{\bf{x = 55}}

55% of 20 is 11.
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Related questions

Find the quotient. (6x 2 + 23x + 20) ÷ (5 + 2x) 3x - 4 3x + 4 3x +19

\frac{6x^{2} + 23x + 20}{2x + 5} = \frac{6x^{2} + 15x + 8x + 20}{2x + 5} = \frac{3x(2x) + 3x(5) + 4(2x) + 4(5)}{2x + 5} = \frac{3x(2x + 5) + 4(2x + 5)}{2x + 5} = \frac{(3x + 4)(2x + 5)}{2x + 5} = 3x + 4

The answer is B.

ANSWERED AT 18/01/2020 - 01:13 PM


QUESTION POSTED AT 18/01/2020 - 01:13 PM

20% of the people left and 76 remain, how many people were there?

Percent porportion 76 over x and 20 over 100  mutply 76x100 then divide by 20 x= youre anwser

ANSWERED AT 18/01/2020 - 01:09 PM


QUESTION POSTED AT 18/01/2020 - 01:09 PM

To solve the equation - 4 = 20, you would first add 4 to each side and then divide each side by 8. True False

False, just divide 20 by -4 to get correct answere.

ANSWERED AT 18/01/2020 - 01:08 PM


QUESTION POSTED AT 18/01/2020 - 01:08 PM

Andrew estimated the weight of his dog to be 60 lb. The dog’s actual weight was 68 lb. What was the percent error in Andrew’s estimate? Round your answer to the nearest tenth of a percent.

Correct - wrong    percentage
-------------------- = ---------------
       wrong                100
68 - 60      x
--------- = ----
   60       100
 8       x
---- = ----
60    100
800    60x
----- = ----
 60     60
13.3% = x

ANSWERED AT 18/01/2020 - 01:04 PM


QUESTION POSTED AT 18/01/2020 - 01:04 PM

Which expression is equivalent to 8a + 20? A. 4(2a + 20) B. 4(2a + 5) C. 4(4a + 16) D. 4(4a + 5)

B since 4 times 2 is 8 and 4 times 5 is 20

ANSWERED AT 18/01/2020 - 12:54 PM


QUESTION POSTED AT 18/01/2020 - 12:54 PM

Andrew bought 3 baseball cards for $240. After a few months, he got an offer from his friend Jack to buy the first card for double its original value, along with either the second or third card. Andrew decided to sell the first card (at double its original value) along with the second card (at its original price) and got $320 for it. Or, selling the first card (at double its original value) card along with the third card (at its original price) would have only got him $280. What were the original prices for each of the 3 baseball cards? A-(80, 120, 40) B-(80, 130, 30) C-(130, 90, 20) D-(120, 80, 40)

Answer:

Option D. (120, 80, 40)

Step-by-step explanation:

Let the cost of 3 baseball cards bought by Andrew are $x, $y and $z.

Now we will form the equations to find the unknown values of x, y, and z.

Statement 1 - Andrew bought 3 baseball cards for $240

Equation will be (x + y + z) = 240 --------(1)

Statement 2 - Jack offered a deal to buy the first card for the double of its original value along with the second card for $320.

Equation will be 2x + y = 320 --------(2)

Statement 3 - Jack offered another deal to buy first card for the double of its original value along with third card for $280

Equation formed 2x + z = 280 ------(3)

Now we can solve these equations to get the values of x, y and z.

From equation 2

y = 320 - 2x

From equation 3

z = 280 - 2x

Now we can replace the values of y and z in equation number 1.

Equation 1 becomes after substitution of y and z values

x + (320 - 2x) + (280 - 2x) = 240

Now we will group the similar terms

(x - 2x - 2x) + (320 + 280) = 240

-3x + 600 = 240

-3x = 240 - 600

-3x = - 360

x = \frac{360}{3}

x = 120

Now  we put x = 120 in the value of y

y = 320 - 2x

y = 320 - 2×120

  = 320 - 240

  = 80

Similarly we put the value x = 120 in value of z

z = 280 - 2x

  = 280 - 2×120

  = 280 - 240

  = 40

So the original values of 3 baseball cards are (120, 80, 40)

Option D. will be the answer.

ANSWERED AT 18/01/2020 - 12:53 PM


QUESTION POSTED AT 18/01/2020 - 12:53 PM

Enrollment in a photography class increased from 25 to 35 students. What was the percent of increase in enrollment?

Answer

40%

Explanation

A parentage value is a value that has been compared to 100.

Percentage = (change in the value)/(the original value) × 100%

                   = (35-25)/25 × 100%

                    = 10/25 × 100%

                   = 40%

ANSWERED AT 18/01/2020 - 12:49 PM


QUESTION POSTED AT 18/01/2020 - 12:49 PM

What is 35 percent of 70

35 Percent of 70 is 24.5
We assume, that the number 70 is 100% - because it's the output value of the task. We assume, that x is the value we are looking for. If 70 is 100%, so we can write it down as 70=100%. We know, that x is 35% of the output value, so we can write it down as x=35%. Now we have two simple equations: 1.)70=100% 2.)x=35%where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that: 70/x=100%/35% Now we just have to solve the simple equation, and we will get the solution we are looking for.

ANSWERED AT 18/01/2020 - 12:47 PM


QUESTION POSTED AT 18/01/2020 - 12:47 PM

Convert 1.05 to a percent

Answer:

105%.

Step-by-step explanation:

We are asked to convert 1.05 to a percent.

To convert a decimal to percent, we simply multiply the decimal number by 100 and add a percentage sign.

Let us multiply 1.05 by 100.

\text{1.05 to percentage}=1.05\times 100\%

\text{1.05 to percentage}=105\%

Therefore, 1.05 as a percent would be 105%.

ANSWERED AT 18/01/2020 - 12:44 PM


QUESTION POSTED AT 18/01/2020 - 12:44 PM

What is A2 – (B + C) in simplest form? A=8x2 – 25x + 7 B=8x2– 25x + 11 C=10x2 – 25x + 7 D=10x2 – 25x + 11 A, B, and C are polynomials, where: A = 3x – 4 B = x + 7 C = x2 + 2

Answer: 8x^2 - 25x + 7

Step-by-step explanation:

Here, A = 3x - 4, B = x + 7 and C = x^2 + 2

A^2 - (B + C)= (3x-4)^2-(x+7+x^2+2)     ( By putting the values)

=  (3x)^2+ (4)^2- 2\times 3x\times 4- x- 7 - x^2 -2    ( solving the brackets)

=   9x^2+ 16 - 24x - x- 7 - x^2 -2

=   8x^2- 25x + 7        ( By operating like terms)

A^2 - (B + C) = 8x^2- 25x + 7

Thus, Option A is correct.

ANSWERED AT 18/01/2020 - 12:15 PM


QUESTION POSTED AT 18/01/2020 - 12:15 PM

How many different arrangements can be made with the letters in the word POWER? 100 20 120 25

120 different arrangements

ANSWERED AT 18/01/2020 - 12:13 PM


QUESTION POSTED AT 18/01/2020 - 12:13 PM

Denise is designing the seating arrangement for a concert an outdoor theater. To give everyone a good view, each row must have 6 more seats than the row before it, and the 1st row can only have 11 seats. Help Denise plan the rest of the seating by solving for how many seats are in row 18. Then explain to Denise how to create an equation to predict the number of seats in any row. Show your work, and use complete sentences.

Given:
1st term = 11
common difference = 6

f(x) = 11 + 6(x - 1)
f(18) = 11 + 6(18-1)
f(18) = 11 + 6(17)
f(18) = 11 + 102
f(18) = 113 number of seats in row 18.

Row
1              11    11  
2       11     6    17
3       17     6    23
4       23     6    29
5       29     6    35
6       35     6    41
7       41     6    47
8       47     6    53
9       53     6    59
10     59     6    65
11     65     6     71
12     71     6     77
13     77     6     83
14     83     6     89
15     89     6     95
16     95     6    101
17   101     6    107
18   107     6    113

ANSWERED AT 18/01/2020 - 12:08 PM


QUESTION POSTED AT 18/01/2020 - 12:08 PM

Eighty-four is what percent of 212? 3.962% 39.62% 2.52% 25.2%

Answer:

Option B, 39.62%

Step-by-step explanation:

We have to find 84 is what percent of 212.

For this we will put 84 in the numerator and 212 in the denominator to find the fraction first.

Then we will multiply this fraction by 100 to get the percentage.

Fraction of 84 to 212 = \frac{84}{212}

                                  =  \frac{21}{53}

Now the percentage will be \frac{21}{53}\times 100

                                        = 39.62%

Option B, 39.62% is the correct answer.

ANSWERED AT 18/01/2020 - 12:02 PM


QUESTION POSTED AT 18/01/2020 - 12:02 PM

You mix the letters M, A, T, H, E, M, A, T, I, C, A, and L thoroughly. Without looking, you draw one letter. Find the probability P(A). Write the probability as: a. a fraction in simplest form b. a decimal c. a percent

There are 12 letters in the mix and there are 3 letter A's. Therefore, the probability of drawing A of P(A) is:

a. a fraction in simplest form = 3/12 = 1/4
b. a decimal = 1/4 = 0.25
c. a percent = 0.25 *100% = 25%

ANSWERED AT 18/01/2020 - 11:58 AM


QUESTION POSTED AT 18/01/2020 - 11:58 AM

There are five different colored cards in a hat (red, blue, green, yellow, and black). A card is randomly drawn and not replaced. Then a second card is drawn. What is the probability that the first card will be red and the second card will be blue? 4% 5% 20% 25%

Hi there!


First, for any of the five cards being drawn, there is a 1/5 chance, or 20%. So, the probability of a red card being drawn is 1/5. Then, since the card is not replaced, it becomes a 1/4, or 25%, chance of any card being drawn (besides red). So, the probability of a blue card being drawn is 1/4. So in order to find what the question is asking, we'll need to multiply the two fractions together.


1/5 x 1/4 = 1/20

1/20 = 5%


Therefore, the correct answer is 5%, or the second option.


Hope this helps!! :)

ANSWERED AT 18/01/2020 - 11:53 AM


QUESTION POSTED AT 18/01/2020 - 11:53 AM

Change 0.625 to a percent.

The answer is 62.5%
move the decimal two spots to the right

ANSWERED AT 18/01/2020 - 11:52 AM


QUESTION POSTED AT 18/01/2020 - 11:52 AM

The table below shows data from a survey about the amount of time students spend doing homework each week. The students were either in college or in high school: High Low Q1 Q3 IQR Median Mean σ College 20 6 8 18 10 14 13.3 5.2 High School 20 3 5.5 16 10.5 11 11 5.4 Which of the choices below best describes how to measure the spread of this data? A. Both spreads are best described with the IQR. B. Both spreads are best described with the standard deviation. C. The college spread is best described by the IQR. The high school spread is best described by the standard deviation. D. The college spread is best described by the standard deviation. The high school spread is best described by the IQR.

Answer:

C. The college spread is best described by the IQR. The high school spread is best described by the standard deviation.

Step-by-step explanation:

If data is normally distributed we use Standard deviation otherwise we use Interquartile Range (IQR) for measuring the spread.

Further, data is said to be normally distributed if Mean = Median = Mode.

So, High School data is normally distributed but College data is not.

So, We measure the spread of College data by IQR and High School data by Standard Deviation.

Thus, Option C is the only correct option.

ANSWERED AT 18/01/2020 - 11:47 AM


QUESTION POSTED AT 18/01/2020 - 11:47 AM

To eliminate the x-terms and solve for y in the fewest steps, by which constants should the equations be multiplied? First equation: 6x − 5y = 17 Second equation: 7x + 3y = 11 The first equation should be multiplied by 3 and the second equation by −5. The first equation should be multiplied by 3 and the second equation by 5. The first equation should be multiplied by 7 and the second equation by −6. The first equation should be multiplied by 7 and the second equation by 6.

The correct answer is:

The first equation should be multiplied by 7 and the second equation by −6.

Explanation:

We are told we want to eliminate the x-terms. This means the coefficients should be the same.

It will also be easier if one is positive and one is negative.

The x-coefficient of the first equation is 6 and the x-coefficient of the second equation is 7. In order to have the same coefficients, we should try to make both of them equal 42 (this is the least common multiple, or LCM, of 6 and 7). To do this, multiply the first equation by 7 (6*7 = 42) and the second one by 6 (7*6 = 42). Additionally, to make the second equation negative, we will multiply it by a negative, so -6.

ANSWERED AT 18/01/2020 - 11:33 AM


QUESTION POSTED AT 18/01/2020 - 11:33 AM

What is the distance between the points ( 38,30) and (14,20)?

To find out the distance of two coordinates, we can use this equation.

Distance S = [ (y2-y1)^2 + x2-x1)^2 ] ^ 0.5

x1 , y1 = 38 , 30
x2 , y2 = 14 , 20

Distance S = [ (20-30)^2 + (14-38)^2 ] ^0.5
                   = [ 10^2 + (-24)^2 ] ^ 0.5
                   = [ 100 + 576 ] ^ 0.5
                   = 676 ^ 0.5
                   = 26


ANSWERED AT 18/01/2020 - 11:32 AM


QUESTION POSTED AT 18/01/2020 - 11:32 AM

What is the nth term of the sequence? 4, –1, –6, –11, … a. 5n – 9 b. n + 3 c. –5n + 9 d. –5n + 4

C. -5n + 9
When you sub in 1 for n you get -5(1)+9 which is 4 and when 2 is subbed in for n it is -10+9 which is -1 so it checks. After -11, the next number would be -5(5)+9= -16

ANSWERED AT 18/01/2020 - 11:30 AM


QUESTION POSTED AT 18/01/2020 - 11:30 AM

Change 1/4 to a decimal, then a percent.

Changing to decimal
1 / 4 = 0.25

Changing to percent, it should be multiplied with 100
0.25*100
25 percent

ANSWERED AT 18/01/2020 - 11:25 AM


QUESTION POSTED AT 18/01/2020 - 11:25 AM

Which equation is an identity? A. 7m – 2 = 8m + 4 – m B. 8y + 9 = 8y – 3 C. 11 – (2v + 3) = –2v – 8 D. 5w + 8 – w = 6w – 2(w – 4)

An identity is obtained when you substitute any value of x to an equation, both sides will give out the same answer. A trial-and-error method is best used for questions like these. The method is shown below:

Let: 1 = m = y = v = w

A. 7m – 2 = 8m + 4 – m

7(1) – 2 = 8(1) + 4 – (1)
5 =/= 11

B. 8y + 9 = 8y – 3

8(1) + 9 = 8(1) - 3
17 =/= 5

C. 
11 – (2v + 3) = –2v – 8

11 - (2(1) + 3) = -2(1) - 8
6 =/= -10

D. 
5w + 8 – w = 6w – 2(w – 4)

5(1) + 8 -1 = 6(1) - 2(1 - 4)
12 = 12

Therefore, the choice D is the identity.

ANSWERED AT 18/01/2020 - 11:22 AM


QUESTION POSTED AT 18/01/2020 - 11:22 AM

Factor 2x^2 - 9x - 11.

X^2 - 9x - 22
(x-11)(x+2)
(2x-11)(x+1)

ANSWERED AT 18/01/2020 - 11:13 AM


QUESTION POSTED AT 18/01/2020 - 11:13 AM

Natalie wants to buy a shirt that costs $24. It is on sale for 20% off the original price. How much does she pay for the shirt? $19.20 $21.60 $26.00 $28.80

Answer:

She pays $19.20

Step-by-step explanation:

Given,

The cost price of the shirt = $ 24,

There is a 20% off,

So, the selling price of the shirt = cost price - 20% of cost price

=24-20\%\text{ of }24

=24-\frac{20\times 24}{100}

=24-\frac{480}{100}

=24-4.8

=\$ 19.2

ANSWERED AT 18/01/2020 - 11:13 AM


QUESTION POSTED AT 18/01/2020 - 11:13 AM

Which of the following correctly completes the square for the equation below? x^2+2x=19 a. (x+2)^2=20 b. (x+1)^2=23 c. (x+1)^2=20 d. (x+2)^2=23

Answer:

c. (x+1)^2=20

Step-by-step explanation:

Since, for getting a perfect square on the left side of a quadratic equation we follow the following steps,

Step 1 : Make 1 as the coefficient of x^2.

Step 2 : Add both side the square of a number which is half of the x's coefficient.

Given equation,

x^2+2x=19 -----(1)

Here, the coefficient of x^2 is already one.

And, the middle term is 2,

Half of 2 is 1

Also, 1² = 1

Thus, add 1 on both sides of equation (1),

x^2+2x+1 = 19 + 1

(x+1)^2 = 20    ( Because (a+b)² = a² + 2ab + b² )

Option C is  correct.

ANSWERED AT 18/01/2020 - 11:12 AM


QUESTION POSTED AT 18/01/2020 - 11:12 AM

What percent of 8 is 4

4 = amount 

8 = base 

amount / base = percent 

4 / 8 = 0.50 

multiply 100 times the decimal and attact he % symbol 

100 x 0.5 = 50 % 

4 is 50% of 8 

ANSWERED AT 18/01/2020 - 11:02 AM


QUESTION POSTED AT 18/01/2020 - 11:02 AM

Pose a question for which a two-way table is appropriate. Be creative here! Collect data from at least 20 people (or other sources). Display your data in a two-way frequency table like the one shown below. Your table can have more rows or columns if you need them. Choose a row and column and compare P(A | B) with P(B | A). Explain what each probability means in the context of the situation and data you collected. Compare P(A∩B) with P(A∪B), and explain what each probability means in the context of the situation and data you collected. Answer the following reflective questions about completing question 3: Why did you choose this topic? How did you collect your data? What challenges did you encounter in the data collection, data display, or data analysis? How did you overcome these challenges?

Define an issue that is important to you (politics, medicine, social media, education, etc.), and think about some things you might want to know about this issue. Briefly explain your issue and what you hope to learn or understand. Pose a question for which a two-way table is appropriate. Be creative here! Collect data from at least 20 people (or other sources). Display your data in a two-way frequency table like the one shown below. Your table can have more rows or columns if you need them. I am not quite sure of what the question is supposed to be.

ANSWERED AT 18/01/2020 - 11:01 AM


QUESTION POSTED AT 18/01/2020 - 11:01 AM