answer.
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
pishuonlain [190]
2 years ago
5

In a library, the ratio of maths books to science books is 3 : 2 and the ratio of science books to history books is 1 : 3. If th

e total number of books is 220, how many maths books are there?
Mathematics
1 answer:
trapecia [35]2 years ago
6 0

Answer:

60 maths books

Step-by-step explanation:

<u>Let the following be:</u>

  • Maths books = m
  • Science books = s
  • History books = h

<u>And we have ratios and sum:</u>

  • m/s = 3/2
  • s/h = 1/3
  • m+s+h = 220

<u>From the ratios we get:</u>

  • m = 3s/2
  • h= 3s

<u>Considering the above in the sum of books:</u>

  • m+s+h = 220
  • 3s/2 + s + 3s = 220
  • 3s + 2s + 6s = 2*220
  • 11s = 440
  • s = 440/11
  • s = 40

<u>Number of maths books:</u>

  • m = 3s/2 = 3*40/2 = 60
You might be interested in
Robby had 4 4/9 bags of pet food.All of the bags held the same amount of food when they were full.Of Robby's 4 4/9 bags of pet f
Tpy6a [65]

Answer: 1.8 bags

Step-by-step explanation:

From the question, given that robby have 4 4/9 bags of pet food, 2/5 were dog food

2/5 of 4 4/9 = dog foods

Convert 4 4/9 to proper fraction= 40/9

2/5 of 40/9 means 2/5 × 40/9

= 16/9

= 1.78 or 1.8

I hope this helps, please mark as brainliest answer.

4 0
2 years ago
2 triangles have identical side lengths and angle measures. The second triangle is rotated slightly to the left. Which statement
aleksklad [387]

Answer:

It is rigid because all side lengths and angles are congruent.

Step-by-step explanation:

2 triangles have identical side lengths and angle measures. The second triangle is rotated slightly to the left. It is a rigid motion.

Definition of rigid motion : -

The performance of any combination of the following actions, namely - translation, rotation or/ and reflection keeping the size and shape of a geometric body constant  is called performing 'Rigid motion'.

5 0
2 years ago
Read 2 more answers
Two identical square pyramids were joined at their bases to form the composite figure below. 2 square pyramids have a base of 24
Archy [21]

Answer:

B

Step-by-step explanation:

<h3>bc I took it and got it right periodt</h3>
6 0
2 years ago
Read 2 more answers
A charity fair raised $6000 by selling 500 lottery tickets. There were two types of lottery tickets; A ticket cost $10 each, and
Agata [3.3K]
12 b tickets and 39 A tickets
5 0
2 years ago
George has 1/3 pan of brownies.He eats 1/4 of them.What fraction did George eat?
Evgen [1.6K]

Answer:

1/12

Step-by-step explanation:

You want to find the compatible numbers with the common denominator so you want to multiply by ones until you get something with the same denominator. In this case it's 12, 1/3 x 4 = 4/12 and 1/4 x 3 = 3/12, Then subtract. Therefore you get your answer 1/12

5 0
2 years ago
Other questions:
  • In 2008, the price of a gallon of unleaded gasoline was $4.02. In 1990, it was only $1.37 per gallon. What is the increase expre
    6·1 answer
  • What is the area of the composite figure whose vertices have the following coordinates? (−2, −2) , (3, −2) , (5, −4) , (1, −8) ,
    12·2 answers
  • Given that Annie chooses a red shirt at random, what is the probability that the shirt will be large? Use the formula P(A | B)=
    7·1 answer
  • 16 tons 400 pounds divided by 5
    14·1 answer
  • Let x = a + bi and y = c + di and z = f + gi Which statements are true? Check all of the boxes that apply. x + y = y + x (x × y)
    6·2 answers
  • 11. Braydon buys a new CD and pays 8% sales tax. If the sales tax is $1.20, calculate
    6·1 answer
  • Write 0.00658 in standard form
    10·1 answer
  • Hurry please<br> What is the value of 12 Superscript 0?
    8·2 answers
  • Kai has begun to list, in ascending order, the positive integers which are not factors of
    14·1 answer
  • In a class, 4/5 of the students have mathematical instruments. 1/4 of these students have lost their protractors. What fraction
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!