Fernando has a prime number of books between 21 and 30 he says that if he takes 4of the books away he will be able to place the same number of books on wacho shelf of this bookcase how Many books does fernando have how many shelves are on the bookcase

Answers

Answer 1

Answer:

29 books ; 5 bookshelfs

Step-by-step explanation:

Solving logically ;

Prime numbers between 21 and 30 = 23, 29

Hence, number of books Fernando has is either 23 or 29

Taking 4 away from the number of books, he'll be able to arrange same number of books on each of his book shelve;

From the statement, we can conclude that :

Subtracting 4 from the number of books Fernando has should give a perfect square

If 23 books

23 - 4 = 19 ; 19 isn't a perfect square

If 29 books :

29 - 4 = 25

Hence, to place the same Number of books on each shelf :

Sqrt(25) = 5

Hence, number of bookshelf = 5


Related Questions

Pleaseee I need help it’s a major grade

Answers

Answer: D.

Step-by-step explanation:

48/2.15= d, so 2.15d=48

NEED HELP NOW PLZZ
24=6c
SHOW WORK

Answers

Answer:

c = 4

Step-by-step explanation:

6c = 24

(divide 6 by each number to get eh variable by itself)

6c = 24

/6    /6

c = 4

To check work:

insert 4 for c into equation

6(4) = 24

24 = 24

Kristen bought a skirt for $25 and tennis shoes for $60. There was 7% tax charged on the total. How much is the total purchase price after tax?

Answers

Answer:

$90.95

Step-by-step explanation:

$25+$60=$85

$85x0.07=$5.95

$85+$5.95=$90.95

Answer: $90.95

60+25= 85

85*.07= 5.95

85+5.95= 90.95

I need help pls...ty :)

Answers

Answer:

132

Step-by-step explanation:

because area is when you multiply 2 numbers and if you multiply 12 and 11 you will get 132 u welcome

Alicia purchased h half gallons of ice cream for 3.50 each p packages of ice cream cones for 2.50 each she purchased 14 items and spent 43$ which system of equations could be used to determine how many of each item Alicia purchased

Answers

Answer:

H + P = 14

3.50H + 2.50P = 43

Step-by-step explanation:

Given that

H denotes half gallons of ice cream

P denotes packages of ice cream cones

Now  

H + P = 14

And,  

3.50H + 2.50P = 43

So, the systems of equations would be

H + P = 14

3.50H + 2.50P = 43

what is the sum?
[tex] \binom{3}{5} + \binom{1}{5} [/tex]

Answers

Answer:

4/5

Step-by-step explanation:

4x + 3y = -26
x-3y =-14

Answers

Answer:

x=-8, y=2

Step-by-step explanation:

Hope I helped!

In France, a laptop costs €540
In England, the same laptop costs £460
(b) Work out the difference between the cost of the laptop in France and the cost of the laptop in
England
You must show clearly how you got
your answer.

Answers

Answer: 540 - 460 =80 thats all you have to do

Step-by-step explanation:

540-460=80

the answer is £80

4/7 divided by 2 1/3

Answers

2 1/3 = 7/3
4/7 / 7/3 = 4/7 x 3/7
= 12/49
The answer to this question is 12/49

HEEEEELLLLLPPPPP!!!!!!!!!!!

Answers

they are the same angle so it would be 106

Answer:

74

Step-by-step explanation:

180 minus 106 is equal to 74

Please help me with this problem. Best answer will get brainliest!

Answers

Answer:

c=20 e=114 d=46 dec=180

Step-by-step explanation:

y=5

Answer:

m∠C = 32°

m∠D = 82°

m∠DEC = 66°

Step-by-step explanation:

Exterior Angle Theorem says that the degree measure that with an angle forms a straight line (Ex. Angle DEF in the picture) is equal to the sum of the two other angles in the triangle. This means that the measure of angle DEF is equal to the measure of angle DCE plus the measure of angle CDE. This would mean that 9y + 1 + 3y + 5 = 114, meaning that 12y + 6 = 114, which means that 12y = 108, which means that y = 9. If we plug 9 in for all of these values, we get that angle D is 9 * 9 + 1, which is 82 and that angle C is 3 * 9 + 5, which is 32. Next, we know that the sum of angles in a triangle is 180, so we subtract 32 and 82 from 180 to find the measure of angle DEC, and this is 66 degrees.

The cattle at the Hodges family farm are fed 6 bales of hay each day. The horses are fed 2/3 as much as the cattle. how many bales of hay are the horses fed each day ?

Answers

Answer:

4 Bales Of Hay

Step-by-step explanation:

First you need to split the total into thirds. To do this you divide 6 by 3

6/3 = 2

Then since there are two thirds, you multiply 2 by 2

2*2 = 4

So the final answer is 4

How many radians is 252°?
Give the exact answer in simplest form

Answers

Radian is a more advanced degrees measurement that is easier to use in trigonometry physics etc.

A full circle 360 degrees is 2pi radian.

We just need to find the ratio of 252 degrees to 360 degrees and multiply that by 2pi.

252/360*2pi(rad)

=126/180*2pi(rad)

=63/90*2pi(rad)

=21/30*2pi(rad)

=7/10*2pi(rad)

=7/5*pi (Radian)

Hope it helps and sorry for my bad grammar.

How do I solve this and what’s the answer? This is due at 11:59 pm on 2/9/21 PLEASE HELP!

Answers

Answer:

I believe the answer is 8.

Please answer these 3 they are pretty simple tysm will mark brainliest

Answers

7: -69

8: -2+3-4 = -3

9: $ (5y+10)

Plz help there are no answer choices

Answers

It’s most likely 9, because width grew from 4-6 and that’s adding 2. So 7+2=9

7m - 17 = -24
what is m?

Answers

Answer:

Move all terms that don't contain

m

to the right side and solve.

Exact Form:

m

=

41

7

Decimal Form:

m

=

5.

¯¯¯¯¯¯¯¯¯¯¯¯

857142

Mixed Number Form:

m

=

5

6

7

Tap to view steps...

Use the table and the graph to answer the questions.

Function 1

x −1 −2 −3

y 4 6.5 9

Function 2


(a) What is the rate of change for each function? Show your work.

(b) Which function has the greater rate of change?

Answers

a) Function A (table): rate of change = 2.5/1 = 2.5

Function B (graph): rate of change= -4/1 = -4

You should use change in y over change in x for the table

For the graph: move 4 down to get to the center (0,0) =-4 and then the same for -1 to 0

b) Function A should have a greater rate of change

**I hope this is right!

A pair of corresponding angles is

Answers

They’re called transversal lines

PLZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ HELP
Maya exercises at least 50 minutes per day.
Use t to represent Maya's amount of exercise (in minutes per day).

Answers

The answer is T ≧ 50mins/day

What is the greatest surface area of a rectangular solid that can be built from 16 identical unit cubes?

Answers

Answer and explanation:

The surface area of a solid is the sum of the areas of all faces of the solid. The surface area of a cube is calculated using the formula 6a² since a cube has 6 faces in total likewise a cuboid.

We can say the rectangular solid is a cuboid and to find the surface area of the cuboid we add up the surface area of all 16 cubes

Surface area is therefore 16×6a²

HELPPP im confused :/

Answers

Answer:

D.

Step-by-step explanation:

The sides correspond with a favor of 1.5

12/8 = 1.5

7.5/5 = 1.5

3/2=1.5

Sarah drinks 30 liters of water on weekdays and 12 liters of water on weekends. How many liters of water does Sarah drink per day?

Answers

Easy, 6

30 divided by 5 equals 6

12 divided by 2 equals 6

Answer:

6 liters per day

Step-by-step explanation:

Hi there!

We know that Sarah drinks 30 liters on weekdays. There are 5 days in a week not including the weekends. You have to divide 30 liters by 5 to get the per day amount. 30 divided by 5 is 6. This means that Sarah drinks 6 liters per day. This is accurate because when you go on to check the amount of water she drinks on weekends, you know there are two days in a weekend, and you know she drinks a total of 12 liters during the weekend, so 6 liters multiplied by those two days is equal to 12.

Really hope this helps :)

A piece of timber is
x cm long.
How long would 12 pieces of timber be put together in a line?

Answers

Answer:

I believe it would be 12x cm. I'm not really sure but I tried lol

Can someone help me? I'd greatly appreciate it!

Answers

Answer:

11 because you add all the exponents to find the answer 6+4=10 but since R has no number we assume there is an invisible 1 making it 11 :)

Step-by-step explanation:

OMG HELP MEEEEEEEeeeeeeeeeeeeeeeeeeeeeeeeeeee

Answers

Answer:

78

Step-by-step explanation:

*6 on both sides

13*6=d/6*6

please help me stuck

Answers

Answer: 341.4

Step-by-step explanation:

A whole pizza is cut into 8 pieces and you eat 2 of the 1/8 pieces, how much (in a fraction) is left over? 3/8


4/6


2/8


6/8

Answers

Answer:

6/8 is left

Step-by-step explanation:

Hope this helps!! Can I get brainliest please??? :)

8 pieces = 8/8

8/8 - 1/8 - 1/8 = 6/8

         or

8/8 - 2/8 = 6/8

The Students' Conjectures: You and Uyen are writing a grant proposal for $50,000 to
provide wireless Internet access to a rural community in South Korea. Complete the
table to summarize Uyen's idea about the percentage of the population that can get
Internet access for $50,000. (1 point)
Classmate
Conjecture
Uyen

Answers

100,000 beacause of the internet x 2

Find the least common multiple of the set of numbers
8,9

The least common multiple of 8 and 9 is____?

Answers

Answer:

72

Step-by-step explanation:

plz mark brainliest :D

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