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g100num [7]
3 years ago
5

How many combinations of three books can be selected from 40 books?

Mathematics
1 answer:
earnstyle [38]3 years ago
8 0

Answer:

13

Step-by-step explanation:

You just count by adding 3 every time

You might be interested in
Factor 2x^4 + 3x^3 +14x^2 +24x – 16
Annette [7]

Answer:

( x ^2 + 8 ) ( 2 x − 1 ) ( x + 2 )

Step-by-step explanation:

 

a ^2 − b ^2 = ( a + b ) ( a − b )

where  

a = x and  b = 1

( x ^2 + 8 ) ( 2 x − 1 ) ( x + 2 )

Glad I was able to help!!

3 0
3 years ago
The sum of two numbers is -26. One number is 148 less than the other. Find the numbers
maks197457 [2]

Answer:

61 and -87

Step-by-step explanation:

If the numbers are x and x - 148, we can write the following equation:

x + x - 148 = -26

2x - 148 = -26

2x = 122

x = 61 so x - 148 = 61 - 148 = -87

5 0
3 years ago
Write the equation of the line that passes through the points (-7, 7) and (-6, -5).
defon

Answer:

y = -12x - 77

Step-by-step explanation:

The standard form of the equation is expressed as y = mx+b

m is the slope

Given the coordinate (-7, 7) and (-6, -5).

m = -5-7/-6+7

m = -12/1

m = -12

Get the intercept b

Substitute m= -12 and (-7 7) into y = mx+b

7 = -12(-7) + b

7 = 84 + b

b = 7 - 84

b = -77

Get the required equation

y = mx+b

y = -12x +(-77)

y = -12x - 77

This gives the required equation

4 0
2 years ago
Find:P(large or blue)
siniylev [52]

Answer:

7/10

Step-by-step explanation:

Total number = 17+3+8+12 = 40

The ones that are large are 17 and 8

The ones that are blue are 17 and 3

Do not count the 17 twice

P(large or blue) = (17+3+8)/40

                          = 28/40

                         =7/10

7 0
3 years ago
F(x) = 741
Marysya12 [62]

I think its option D

3 0
2 years ago
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