Ask question

Ask question

All categories

2 years ago

7

There are 9 balls in a hat .The balls are numbered 1-9 you need to choose 3 of the balls . How many possible combinations are th

ere

1 answer:

Virty [35]2 years ago

3 0

Answer:

84

Step-by-step explanation:

Combinations

nCr

n (objects) = 9

r (sample) = 3

9C3

n! / r! (n – r)!

9! / 3! (9 – 3)!=

9! / (3! * 6!)=

9*8*7*6!/ (3! * 6!)=

6! cancels out

9*8*7/3*2*1=

3*4*7=

12*7=

84

You might be interested in

A trapezoid has an area of 30 in2. If the lengths of the bases are 4.8 in. and 5.2 in., what is the height?

Aleonysh [2.5K]

5.2+4.8= 10
So it has to be 20 I think

3 0

3 years ago

Which answer represents a geometric sequence?

exis [7]

Answer:

{−1008,−504,−252,−126,…}

Step-by-step explanation:

-504÷(-1 008)=0.5

(-252)÷(-504)=0.5

(-126)÷(-252)=0.5

In this sequence ,we multiply by 0.5 each time to get the next term

then it’s a geometric sequence.

3 0

3 years ago

Guys help me pls I need it immediately

julsineya [31]

Answer:

Hey there!

First, we want to find the side length of the large triangle.

1/2bh=y cm^2

bh=2y cm^2

Since b and h are the same here, we have b^2= 2y, $b=\sqrt{2y}$ .

And we have FC= $\frac{\sqrt{2y} }{2}$ .

Area of shaded triangle: $\frac{1}{2} (\frac{\sqrt{2y} }{2})(\frac{\sqrt{2y} }{2})$ .

This is equal to: $\frac{1}{2}(\frac{2y}{4})$ , or y/4.

Let me know if this helps :)

6 0

3 years ago

8. Amada buys 4 cans of paint and

notka56 [123]

Answer:

can i see a picture to understand it better then step by step it out to you? thank you ~shay

Step-by-step explanation:

4 0

2 years ago

What is the slope of the line through (-2,-6)and (2,2)

STALIN [3.7K]

Answer:

Y2-y1/x2-x1

=2-(-6)/2-(-2)

=8/4

=2

Step-by-step explanation:

Given two points of a line to find the slope we use the formula; y2-y1/x2-x1 Hence the answer above.

6 0

3 years ago