1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
coldgirl [10]
3 years ago
15

The liabary at a school is organized by fiction and non fiction books there a 3 nonfiction books per 7 fiction books how many to

atle books are there if the liabary has a toaytle of 240 non fiction
books
Mathematics
1 answer:
s344n2d4d5 [400]3 years ago
3 0

Ratio- 3:7


240/3= 80

80x7=560

You might be interested in
Margo brought 7 pens from a book store some pens cost $3.00 EACH and the rest cost $4.00 . If she paid a total of 23.00 for the
Montano1993 [528]

Answer:

5

Step-by-step explanation:

Margo bought 7 pens for $23.

Some pens are $3 and some $4.

We need to find how many $3 pens she bought.

Let the number of $3 pens be represented by p and let the number of $3 pens be represented by r. So:

p = $3  and r = $4

Now we know 7 pens were purchased so is we add the number of $3 pens purchased to the number of $4 pens purchased, we will get 7.

p + r = 7

We know that the total cost of the pens is $23 so that equation would be found by takign the $3 pen multiplied by the number of $3 pens purchsed added to the $4 pen multiplied by the number of $4 pens purchsed, which equals $23.

$3p + $4r = $23

Now we have 2 equations and 2 unknowns.

p + r = 7

$3p + $4r = $23

Let's solve for r in the first equation.

p + r = 7     Subtract p from both sides.

p - p + r = 7 - p   The p on the left cancels.

r = 7 - p

Now that we know r, we can substitute it into the second equation and solve for p.

$3p + $4r = $23

3p + 4( 7 - p) = 23       Multiply it out.

3p + 4*7 - 4*p = $23

3p + 28 - 4p = 23      Combine like terms.

3p  - 4p + 28 = 23

- 1p + 28 = 23       Subtract 28 from both sides.

- p + 28 - 28 = 23 - 28  

- p = - 5   Divide each side by -1

- p/- 1 = - 5/ - 1       The negative cancels on each side.

p = 5

We can see Margo bought 5 $3 pens.

For fun, let's solve for how many $4 pens she bought. We know p, so we plug it in the first equation and solve for r.

p + r = 7

5 + r = 7  Subtract 5 from each side

5 - 5 + r = 7 - 5

r = 7 - 5

r = 2

So Margo bought 5 $3 pens and 2 $4 pens!

8 0
2 years ago
According to the diagram, point B lies on how many faces of the pyramid?
Scrat [10]

Answer:

POINT B LIES ON FOUR FACES OF THE PYRAMID

Step-by-step explanation:

A PYRAMID HAS FIVE FACES IN THAT FOUR ARE TRIANGLE ONE IS SQUARE AS POINT B LIES AT THE TOP OF FOUR TRIANGLES WE CONSIDER AS IT LIES ON FOUR FACES OF A PYRAMID

I'VE TRYED MY LEVEL TO HELP YOU ONLOCK A STAR AND ADD ME AS BRAINLIEST

6 0
3 years ago
What is the least common multiple of 28 and 8
nordsb [41]
LEAST COMMON MULTIPLE is 56

hope this helped☺

6 0
3 years ago
Read 2 more answers
A crystallographer measures the horizontal spacing between molecules in a crystal. The spacing is 14.8 nm . What is the total wi
IrinaK [193]
Answer: 1539.2nm

The space between molecule is going as X-1 function. That mean 1 molecule doesn't have space, 2 molecules have 1 space, 3 molecules have 2 space. Then 105 molecules will be will have 104 space.
Each space is 14.8nm, the total  distance would be: 104 space x 14.8 nm/space= 1539.2nm
4 0
3 years ago
The booster club is selling boxes of chocolates. Each box sells for $8.25 and costs $2.75 to make. Fifteen percent of the profit
Alla [95]

Answer:

Step-by-step explanation:

8.25-2.75= 5.50 is profit.

5.50*15%=0.85

0.85*300 boxes= $255.00 the booster club will receive.

5 0
2 years ago
Other questions:
  • X + 34 = 60 what does "x" equal??
    11·2 answers
  • The equation of a circle is ​ (x−10)² + (y−8)² = 256 ​
    11·1 answer
  • A brother and a sister are in the same math class. There are 9 boys and 8 girls in the class. One boy and one girl are randomly
    9·1 answer
  • 20 PTS!!!!!!!! HELPPP
    9·2 answers
  • Find the domain and range of the function y = √x-3 + 6
    5·1 answer
  • Nevaeh has read 168 pages of a 210- page book. What percent of the book has Nevaeh not read?
    10·1 answer
  • What is the constant of proportionality between yyy and xxx in the graph?
    7·2 answers
  • The distance between Matt’s house and his school is 3 inches on the map. The actual distance is 1.5 miles. What is the scale of
    11·1 answer
  • What is the percent change from 147 to 298? Round your answer to the nearest tenth.​
    7·2 answers
  • Two ocean beaches are being affected by erosion. The table shows the width, in feet, of each beach measured at high tide where 1
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!