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
Fofino [41]
3 years ago
14

The library at school is organized by fiction and nonfiction books. There are three nonfiction books for every seven fiction boo

ks. How many total books are there if the library has 240 nonfiction books
Mathematics
2 answers:
iogann1982 [59]3 years ago
5 0
Ratio- 3:7

240/3= 80
80x7=560
Anon25 [30]3 years ago
4 0
3/7 = 240/x....3 non-fiction to 7 fiction = 240 non fiction to x fiction
cross multiply
(3)(x) = (240)(7)
3x = 1680
x = 1680/3
x = 560

so we have 240 non-fiction books and 560 fiction books...for a total of
(240 + 560) = 800 books <==
You might be interested in
I need help with this please. It’s probability.
Vinvika [58]

Answer:

2/13

Step-by-step explanation:

In a deck of 52 cards, there are 2 sets of red cards. Diamonds and Hearts. In each set of red cards, there are 4 fives. If there are 2 sets, that means that there are 8 red fives in the deck of 52 cards. This means that the probability is 8/52 which is simplified into 2/13.

8 0
3 years ago
Evaluate the dot product a⃗ ⋅b⃗ of a⃗ =3i^−8j^ and b⃗ =−2i^−6j^.
Mkey [24]
The "dot product" of two vectors has several different formulas.

Since you are given the x- and y-coordinates of both vectors a and b, we can apply the formula

a dot b  = ax*bx + ay*by, where ax=x-component of vector a, by=y comp of vector b, and so on.  

So, for the problem at hand, ax * bx + ay * by becomes

3(-2) + (-8)(-6) = -6 + 48 = 42 (answer).  Note that the dot product (or "scalar product" is itself a scalar.
4 0
3 years ago
Can ya'll help me? tehee :)
monitta
128
328
437
837
Hope it helped
3 0
3 years ago
Explain what the mean absolute deviation is in general. Explain what the MAD means in the context of Robin and Evelyn’s data.
sergij07 [2.7K]

Answer: The MAD describes the average distance from a data point to the mean. It measures variability. For this data, it shows that Evelyn’s scores varied slightly more than Robin’s.

Step-by-step explanation: Add 8+1+5+0+12 and divide it by 5 and get 5.2

6 0
2 years ago
If (ax+2)(bx+7)=15x2+cx+14 for all values of x, and a+b=8, what are the 2 possible values fo c
dolphi86 [110]

Given:

(ax+2)(bx+7)=15x^2+cx+14

And

a+b=8

Required:

To find the two possible values of c.

Explanation:

Consider

\begin{gathered} (ax+2)(bx+7)=15x^2+cx+14 \\ abx^2+7ax+2bx+14=15x^2+cx+14 \end{gathered}

So

\begin{gathered} ab=15-----(1) \\ 7a+2b=c \end{gathered}

And also given

a+b=8---(2)

Now from (1) and (2), we get

\begin{gathered} a+\frac{15}{a}=8 \\  \\ a^2+15=8a \\  \\ a^2-8a+15=0 \end{gathered}a=3,5

Now put a in (1) we get

\begin{gathered} (3)b=15 \\ b=\frac{15}{3} \\ b=5 \\ OR \\ b=\frac{15}{5} \\ b=3 \end{gathered}

We can interpret that either of a or b are equal to 3 or 5.

When a=3 and b=5, we have

\begin{gathered} c=7(3)+2(5) \\ =21+10 \\ =31 \end{gathered}

When a=5 and b=3, we have

\begin{gathered} c=7(5)+2(3) \\ =35+6 \\ =41 \end{gathered}

Final Answer:

The option D is correct.

31 and 41

8 0
11 months ago
Other questions:
  • A triangle has a sides (x) feet, (x+3) feet, and (x+5) feet. The perimeter is 99.5 feet What is the measure for the largest side
    11·1 answer
  • Simplify √ a^7 , where a&gt;0 Which expression is equivalent to √a^7
    14·1 answer
  • How many seconds in 10 minutes??
    13·2 answers
  • What is 1/8 divided by 1/2
    7·2 answers
  • Michael had $550 in his savings account. He took out $30.75 every month for one year. What is the net change in Michael's accoun
    8·1 answer
  • 3475 milliliters to liters
    5·2 answers
  • Y 2 - x +4<br> x+y&lt;0<br><br> someone plz help me
    11·1 answer
  • Helppp i will give brainlist​
    8·1 answer
  • 27÷819= <br> give me the quotient for 27÷819
    13·1 answer
  • The speed of light is 3 × 108 meters per second. It take 1.82 × 102 seconds for light to reach Mars. What is the distance, in me
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!