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2 years ago

School a has 18 staff and 225 students.

Mathematics

1 answer:

Pavel [41]2 years ago

6 0

Answer:

School A

Step-by-step explanation:

School A has a ratio of 18/225 = 2/25 staff to students
School B has a ratio of 23/322 = 2/28 = 1/14 staff to students
Assuming that a better ratio means more staff per students School A has a better ratio

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if someone buys an orange for 27pounds and that person pays with 1 pound how much does that person get back

Darya [45]

Answer:

-26 pounds

Step-by-step explanation:

if something coasts 27 pounds and you give them 1 pound

27-1=26 you're short 26 pounds

therefore the answer is -26

3 0

2 years ago

A group issimpleif it has no nontrivial proper normal subgroups. LetGbe a simple group of order168. How many elements of order 7

stepladder [879]

Answer:

6*8=48 groups with elements of order 7

Step-by-step explanation:

For this case the first step is discompose the number 168 in factors like this:

$168 = 8*3*7= 2^3 *3*7$

And for this case we can use the Sylow theorems, given by:

Let G a group of order $p^{\alpha} m$ where p is a prime number, with $m\leq 1$ and p not divide m then:

1) $Syl (G) \neq \emptyset$

2) All sylow p subgroups are conjugate in G

3) Any p subgroup of G is contained in a Sylow p subgroup

4) n(G) =1 mod p

Using these theorems we can see that 7 = 1 (mod7)

By the theorem we can't have on one Sylow 7 subgroup so then we need to have 8 of them.

Every each 2 subgroups intersect in a subgroup with a order that divides 7. And analyzing the intersection we can see that we can have 6 of these subgroups.

So then based on the information we can have 6*8=48 groups with elements of order 7 in G of size 168

3 0

2 years ago

Median and the data 11 , 17 , 7 , 4 , 15 , 9

Natasha2012 [34]

Answer:

10.

Step-by-step explanation:

median means the "middle" number in a set of numbers.

(I always the meaning of median by remembering "middle" because they rhyme).

NOTE: to find the median of a set of numbers you have to arrange that set of numbers in either ascending order (smallest to biggest value) or descending order (biggest to smallest value) .

sooo....

we were given :

11, 17, 7, 4, 15, 19

let's arrange in ascending order

4, 7, 11, 15, 17 , 19

now you can cancel them out ( cancel left number, right number)

i mean....

cancel out 4, cancel out 19

cancel out 7, cancel out 17

and we are left with 2 numbers which are11 and 15.

NOTE; (when you have two numbers or values remaining instead of one number, add those two numbers and divide by 2).

soooo...

11 + 15 = 20

20/2 = 10

median of the set of numbers is equal to 10.

Hope this helps.

Good luck ✅.

4 0

1 year ago

PLEASE HELP ME ITS MULTIPLE CHOICE

Olenka [21]

Answer:

Step-by-step explanation:

The answer is class D so number 4

5 0

2 years ago

Round 8923 to the thousand

slamgirl [31]

Answer:

89000

Step-by-step explanation:

u start from unit tens hundred thousand

89000

4 0

3 years ago