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
Masteriza [31]
3 years ago
15

Sir? sir? are u there? help me -_-

Mathematics
1 answer:
vfiekz [6]3 years ago
5 0

Answer:

a) The easiest way is to use a calculator such as a Casio brand or Sharp brand and key in 9C7 to get 36.

However, you can also use this formula: nCr=\frac{n!}{r!(n-r)!} where n is the total number of items and r is how many you are selecting.

Plug in values:

\frac{9!}{7!(9-7)!} =\frac{9!}{7!*2!}=\frac{9*8}{2!}=36

b) The easiest way is to use a calculator such as a Casio brand or Sharp brand and key in 9P7 to get 181440.

However, you can also use this formula: nPr=\frac{n!}{(n-r)!} where n is the total number of items and r is how many you are selecting.

Plug in values:

\frac{9!}{(9-7)!} =\frac{9!}{2!}=9*8*7*6*5*4*3=181440

You might be interested in
Identify the volume of a cone with base area 64π m2 and a height 4 m less than 3 times the radius, rounded to the nearest tenth.
melomori [17]
V=basearea times 1/3 times height
basearea=6<span>4π m2
hmm, they try to make it difficult

basearea=circle=pir^2
pir^2=64pi
divide by pi
r^2=64
sqrt
r=9

h is 4 les than 3 time r
h=-4+3(8)
h=-4+24
h=20

v=1/3*64pi*20=1280pi/3 m^3=1350.4

C
</span>
4 0
3 years ago
7/8 = ?/48<br> A.13<br> B. 1<br> C. 42<br> D. 6
Ugo [173]

Hi Brainiac


7/8 =?/48

Let's replace the unknown place by x

7/8 = x/48

Cross multiply

(7)(48)= (X)(8)

336 = 8x

Flip it

8x = 336

Divide both sides by 8

8x/8 = 336/8

x= 42

The answer is C



Now if you wanna see if the answer is good just replace 42 in blank space

7/8 = 42/48

Now didivde 7 by 8 and divide 42 by 48

7/8= 0.875

42/48= 0.875


The answer C is correct


I hope that's help:)


If you have questions please let me know :)

4 0
3 years ago
What is the tangent ratio for ∠E
Stells [14]
Tan E = 6/8 = 3/4

answer
3/4
3 0
3 years ago
Read 2 more answers
What is the value of X?​
algol [13]

Answer:

x = 3

Step-by-step explanation:

ΔABC is 45 45 90 right triangle

The ratio of leg: hypo = a : a√2

Given: hypo  AC = 6√2; so AB = BC = 6

ΔBCD is 30 60 90 right triangle

The ratio of short leg : long leg  : hypo = x : x√3 : 2x

Hypo.  BC = 6 = 2 (3)

So short leg BD = x = 3

7 0
3 years ago
Hal used the scale 1 inch = 6 feet for his scale model of the new school building. The actual dimensions of
elena-14-01-66 [18.8K]

Answer:

5 inch high

20 inch wide

30 inch long

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • How many solutions does this system have?<br><br> y=5x-1<br> y=-3x+7
    12·1 answer
  • 8y+14=3y+49 solve as equations
    6·2 answers
  • Select ALL the expressions that are equal to 3(n+4) *
    13·2 answers
  • Find the area of the composite figure in terms of the figure (use 3.14 for pi)​
    10·1 answer
  • ASAP Find the slope of The ordered pairs (0,-17),(2,13)
    5·2 answers
  • Can somebody help me and answer this I’ll give u thanks if ur right here’s the picture
    5·1 answer
  • Identify the Texas Governor who resigned his office in order to lead Texas Troops in the U.S. vs Mexican War.
    7·1 answer
  • a baker has 88 muffins he fills large boxes that hold 9 muffins each then he puts the leftover muffins in a small box how many m
    11·1 answer
  • A=<br> B=<br> C=<br> ? ? ? ? ? ? ? ? ? ? ? ? ? ?
    14·1 answer
  • How would you write 8^5 as a multiplication expression? A. 8 × 5 B. 8 × 8 × 8 × 8 × 8 C. 5 × 5 × 5 × 5 × 5 × 5 × 5 × 5
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!