Mathematics College

Mr. Brown bought some books at a book sale, including 4 paperback books. 20% of all the books he bought were paperbacks. How many books did Mr. Brown buy in all?​

Answers

Answer 1

Answer:

20 books

Step-by-step explanation:

20% is 1/5 of 100% so the other 4/5 would be 4 times 5 which equals 20 books it total

Answer 2

Answer:

Mr. Brown bought 20 books.

Step-by-step explanation:

20% times 5 would be 100%. Since Mr. Brown bought 4 books, and that was 20% of all the books he bought, you would have to multiply the number of paper back books by 5 to get the answer of 100% of all books he bought, which would be 20. This problem would look like this 20(5) = 4(5), 100% = 20 books.

Related Questions

What is the greatest common factor, and how is the distributive property used to factor it out from a polynomial?

Answers

Answer:

To factor a polynomial, identify the greatest common factor of the monomial terms, and then use the Distributive Property to rewrite the expression. Once a polynomial in a • b + a • c form has been rewritten as a(b + c), where a is the GCF, we say that the polynomial is in factored form.

Step-by-step explanation:

Answer:

To factor a polynomial, identify the greatest common factor of the monomial terms, and then use the Distributive Property to rewrite the expression. Once a polynomial in a • b + a • c form has been rewritten as a(b + c), where a is the GCF, we say that the polynomial is in factored form.

Step-by-step explanation:

Please hurry!!!!
Will give brainly
100 points!!!!!!!!!!

Solve the equation.
-X + 8 + 3x = x - 6
x = -18
x = -14
x = 2
x= 4

Answers

[tex]\sf \longmapsto-x + 8 + 3x = x - 6[/tex]

Combine like terms

[tex]\sf \longmapsto(−x+3x)+(8)=x−6[/tex]

[tex]\sf \longmapsto2x+8=x−6[/tex]

Subtract x from both sides

[tex]\sf \longmapsto2x+8−x=x−6−x[/tex]

[tex]\sf \longmapsto \: x+8=−6[/tex]

Subtract 8 from both sides

[tex]\sf \longmapsto \: x+8−8=−6−8[/tex]

[tex]\sf \longmapsto \: x=−14[/tex]

[tex] \sf \: x = - 14[/tex]

Answer:

x = -14

Step-by-step explanation:

Equation:

-x + 8 + 3x = x - 6

Solution:

-x + 8 + 3x = x - 62x+8 = x-62x - x +8 = -6x + 8 = -6x = -6-8x = -14

Second choice is accurate.

whts the answer its not leting me see it :(

Answers

Answer:

whats the qeaton

Step-by-step explanation:

i need help if you help ill give prize

Answers

Answer:

21 oz!

Step-by-step explanation:

21 Tons would be 42,000 pounds, so  21 oz would be the right choice.

Help me please??????????????????

Answers

Answer:

Step-by-step explanation:

what is this

round 121 to the nearest ten. Enter your answer in the box below.​

Answers

Answer:

The number 2 is in the tens place. The answer 120 because the 1 is less than 5 so it rounds down to the nearest ten which is

120.

Step-by-step explanation:

what number gives a result of -4 when 10 is subtracted from the quotient of the number and 5

Answers

assuming the equation would be

10 - x/5 = -4

you can solve for x

multiply both sides

50 - x = -20

move 50 to the other side

-x = -20-50

-x=-70

or x=70

Tan2 x + sec2x= 1 for all values of x true or false

Answers

Answer:

true

Step-by-step explanation:

It’s false. You cannot prove it because it is not an identity

what 4p-5(p+6)simplified

Answers

Answer: -p - 30

Step-by-step explanation:

Use an exponent to write each expression 7/9 x 7/9 x 7/9 x 7/9 x 7/9 x 7/9 x 7/9 x 7/9

Answers

the exponent is 7^9 i forgot what they were called i’m sorry

(HELP ASAP ILL GIVE BRAINIEST)
Graph h(x) = { x +4.

Answers

The attached picture is the graph of:

[tex]h(x)=\frac{2}{3} +4[/tex]

what are two types of inconsistent equations?

Answers

If the lines are parallel, they won't ever intersect.




A system with no solutions is called an inconsistent system.

Answer:

when there is no solution to the equation and when you have parallel lines

Two cases of cans weigh 32 lbs. How much do 7 cases weigh?

Answers

Answer:

112 lbs

Step-by-step explanation:

32/2 = 16 lbs

16*7 lbs = 112 lbs

PLS GIVE BRAINLIEST

Which statements are true? Select the five correct answers. StartRoot 1.8 EndRoot < 1.8 StartRoot 1.8 EndRoot greater-than 1 StartRoot 1.8 EndRoot less-than StartRoot 1.9 EndRoot 1.3 less-than StartRoot 1.8 EndRoot less-than 1.4 StartRoot 1.9 EndRoot + StartRoot 1.8 EndRoot greater-than 2 StartRoot 1.9 EndRoot minus StartRoot 1.8 EndRoot greater-than 0.1

Answers

Answer:

A,B,C,D,E

Step-by-step explanation:

Answer:

a b c d e

Step-by-step explanation:

edge 2023

Factor 2x^4 + 2x^3 - x^2 - x

Answers

2x^3(x+1)-x(x+1)
(2x^3-x)(x+1)
x(2x^2-1)(x+1)

Using long division, what are the first 4 digits in converting
13/33
to decimal form?

Answers

Answer:

0.3939

Step-by-step explanation:

yup ^ they’re correct

Anthony is making mashed potatoes. He
needs cup of milk. He wants to make 3
batches. How much milk will he use?

Answers

Answer:

3 cups clearly

Step-by-step explanation:

Answer: He will need one cup of milk per serving, so he needs 3 total

Step-by-step explanation: 1 x 3 = 3

PLEASE HELP! NUMBER TWO PLEASE!!

PLEASE SHOW ME HOW YOU DID IT! THANK YOU BUNCHES xoxo

Answers

Answer:

I will demonstrate the first two for you. The answer is 6, 30, 54, 78, 102.

The answer to the second question is -3, 21, 45, 63, 93.

Step-by-step explanation:

Pardon the messiness. I hope this clarifies how to do it from now on! If not, please let me know if you need more help! xoxo

Nami's lemonade pitcher will hold 3 5 gallons of lemonade How many pints of lemonade will the pitcher hold?​

Answers

Answer:

8 pints

Step-by-step explanation:

helllllllppppp me please

Answers

Answer:

no

Step-by-step explanation:



Hi, this is apart of my homework assignment!
The Directions are, “Find the Percent Change. Specify an increase or a decrease.”


13. original amount: 25
amount of increase: 4

This is worth 12 pts!

Answers

Answer:

Percent Change is 16%

The change is increased.

Step-by-step explanation:

The original amount = 25

Amount increase = 4

We need to find percent increase

The formula used is: [tex]\frac{Amount \ increased}{Original \ Amount}*100[/tex]

Putting values in formula

[tex]Percent \ Change = \frac{Amount \ increased}{Original \ Amount}*100\\Percent \ Change =\frac{4}{25}*100\\Percent \ Change =16 \%[/tex]

So, Percent Change is 16%

The change is increased.

Given the point and slope write the equation of the line (-4, 0); slope = 1/2

Answers

Answer:

The equation of the line will be:

[tex]y=\frac{1}{2}x+2[/tex]

Step-by-step explanation:

Given the point

(-4, 0)slope = m = 1/2

As the equation of a line in slope-intercept form is

[tex]y-y_1=m\left(x-x_1\right)[/tex]

where m is the slope

substituting the values m = 1/2 and the point (-4, 0)

[tex]y-y_1=m\left(x-x_1\right)[/tex]

[tex]y-0=\frac{1}{2}\left(x-\left(-4\right)\right)[/tex]

[tex]y=\frac{1}{2}\left(x-\left(-4\right)\right)[/tex]

[tex]y=\frac{1}{2}\left(x+4\right)[/tex]

[tex]y=\frac{1}{2}x+\frac{4}{2}[/tex]

[tex]y=\frac{1}{2}x+2[/tex]

Therefore, the equation of the line will be:

[tex]y=\frac{1}{2}x+2[/tex]

plssssssssssssssss helpppppppppppp and I'll give you a brainliest

Question:

Donatella is planning to mount a television on a wall and wants to make sure it is centered. The wall is 8834 inches in length and she wants to have at least 2412 inches on each side of the television for external speakers. Donatella has researched the lengths of five different televisions.

SELECT ALL of the televisions would fit the remaining space.

Answers Choices:


A. Television A with a length of 3612 inches.


B. Television B with a length of 3814 inches.


Television C with a length of 3934 inches.


C. Television D with a length of 4058 inches.


D. Television E with a length of 4218 inches.

Answers

Answer:

Television A, B, and C would all fit.

Step-by-step explanation:

2412 * 2 = 4824

8834 - 4824 = 4010

Therefore, all TVs 4010 inches or less would fit

the ratio of males to females at camp is 5 to 4. if there are 40 males at the camp, how many females are there?

Answers

Answer:

32

Step-by-step explanation:

5:4 is the ratio. So 40/5 is 8. Therefore, you must multiply 4 by 8 to get the amount of females at the camp. Ergo, the answer is 32

Answer:

32

Step-by-step explanation:

You can solve this by setting up a proportion.

A 5 to 4 ratio is the same as [tex]\frac{5}{4}[/tex]

The proportion is [tex]\frac{5}{4}[/tex] = [tex]\frac{40}{x}[/tex]

By cross multiplying... you find that x (females) is equal to 32

Find the GCF of each pair of monomials.
c. 42mn, 14mn

Answers

Answer:

7

Explanation:

7 is the main number that would go into 14 and 42.

Somebody please help ​

Answers

Is that on a math website called Desmos?

Answer:

Line A slope = 3/2

Line B slope = 2

Step-by-step explanation:

We create the triangles they request for each line, as shown in the attached image, which we use to calculate the vertical change (height of the triangle) and horizontal change (base of the triangle). The height and base of the triangles (depicted in red and blue matching the color of the lines) have been highlighted for easy identification.

We estimate the vertical and horizontal changes, as well as the slope, for each line as shown below:

Line A:

vertical change = (6 - 3 ) = 3

horizontal change = (2 - 0) = 2

slope of line A = 3 / 2

Line B:

vertical change = (6 - 4) = 2

horizontal change = (3 - 2) = 1

slope = 2 / 1 = 2

Multipy 2/6 by 1/5
A) 2/15
B) 2/11
C) 1/15
D) 3/15​

Answers

Answer:

[tex]\huge\boxed{\frac{1}{15} }[/tex]

Step-by-step explanation:

[tex]\sf= \frac{2}{6} * \frac{1}{5} \\\\=\frac{2*1}{6*5} \\\\=\frac{2}{30} \\\\= \frac{1}{15} \\\\\rule[225]{225}{2}[/tex]

Hope this helped!

~AnonymousHelper1807

Answer:

C

Step-by-step explanation:

[tex]\frac{2}{6}*\frac{1}{5}=\frac{1}{3}*\frac{1}{5} = \frac{1}{15}[/tex]

evaluate-(3^5)(3^3)
​

Answers

Answer:

(3+(3)/(5))(3-(3)/(5))

Step-by-step explanation:

Answer:

the answer is 25:)

Step-by-step explanation:

Evaluate the factorial expression.
19!
16!(3 – 1)!

Answers

Answer:

I believe it would be 2907

Step-by-step explanation:

starting with (3-1)! you would get 2, then going on to 16! you would get 20,922,789,888,000, then multiplying that with 2 you would get 41,845,579,776,000, then moving onto the 19! you would get 121,645,100,408,832,000, now last but not least to devide 41,845,579,776,000 by 121,645,100,408,832,000, and to that you would get 2907 hope this helped!

Which function is shown in the graph below?

Answers

Answer:

D

Step-by-step explanation:

As you can see, the range of the graph is all real numbers greater than -4. Therefore you can tell that -4 will have to be in the equation leaving only options B and D. When graphing B and D, D fits the image.

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