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
xeze [42]
2 years ago
15

Sarah is buying some school clothes.

Mathematics
1 answer:
Svetllana [295]2 years ago
6 0
The answer is the first one
You might be interested in
Find the volume of a pyramid with a square base, where the perimeter of the base is
grigory [225]

Answer:

90.3125 cm³

Step-by-step explanation:

Since the perimeter of the bottom square is 17, you can divide by four to find out what the lenght of each side is.

17/4=4.25 cm

We know the height of pyramid is 15 cm

The formula for the volume of a square pyramid is

V=a²(h/3)

V=a2(h/3)=4.252·15/3=90.3125 cm³

8 0
3 years ago
Determine n between 0 and 19 such that (2311)(3912) ≡ n mod 20.
sleet_krkn [62]

You can write 2311 and 3912 in the form 20q+r:

2311=115\cdot20+11

3912=125\cdot20+12

Then

2311\cdot3912=(115\cdot20+11)(125\cdot20+12)

2311\cdot3912=115\cdot125\cdot20^2+(11\cdot125+12\cdot115)\cdot20+11\cdot12

Taken modulo 20, the terms containing powers of 20 vanish and you're left with

2311\cdot3912\equiv11\cdot12\equiv132\pmod{20}

We further have

132=6\cdot20+12

so we end up with

2311\cdot3912\equiv12\pmod{20}

and so n=12.

###

If instead you're trying to find 2311^{3912}\pmod{20}, you can apply Euler's theorem. We can show that \mathrm{gcd}(2311,20)=1 using the Euclidean algorithm. Then since \varphi(20)=8, and 8 divides 3912, we have

2311^{3912}\equiv2311^{489\cdot8}\equiv(2311^{489})^8\equiv1\pmod{20}

To show 2311 and 20 are coprime:

2311 = 115*20 + 11

20 = 1*11 + 9

11 = 1*9 + 2

9 = 4*2 + 1   =>  gcd(2311, 20) = 1

3 0
3 years ago
8x = 3x - 60<br> x = -12<br> X = 11
Temka [501]

Answer: bruh bruh

Step-by-step explanation: bruh bruh

7 0
3 years ago
Read 2 more answers
What is 25/10 converting fractions to mixed numbers​
mote1985 [20]

Hey!

-------------------------------------------------

Solution:

~10 can go in to 25 two times.

10 + 10 = 20

25 - 20 = 5 (remainder)

~20 means that the whole number is 2.

2 5/10

~Simplify and Answer

2 1/2 or 2.5

-------------------------------------------------

Hope This Helped! Good Luck!

5 0
3 years ago
At Store A, a pair of jeans costs $35. The same kind
Alex Ar [27]
It would cost less at store B. Store B’s jeans would be $24.50 and Store A would have their jeans at $28
4 0
2 years ago
Other questions:
  • A population has a mean of 40 and a standard deviation of 15. a sample of size 100 is taken at random from this population. the
    15·1 answer
  • hector is five years less than double mary's age. Mary is 12 years old. how many years old is Hector?
    7·1 answer
  • Lucy and Donavan measured the length of the school garden. Lucy's measurement is 11.3 meters and Donavan's measurement is 113 ce
    12·1 answer
  • How many of these make a semi-circle?
    7·2 answers
  • What is the solution of 2/3a+6&gt;0
    7·1 answer
  • Help me plzzzzzz........
    12·2 answers
  • What is 378.832 in expanded form
    5·1 answer
  • What is the averge of 48, 93, 74, 69​
    15·1 answer
  • Convert 13/2,500,000,000 to decimal
    5·1 answer
  • you have 36 pages to read for homework . in 5 minutes you read 10 pages. if you continue to read at the same rate how many minut
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!