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3 years ago

5

8 elementary classes will be chosen to participate in a school lunch survey. There are 23 elementary classes in the school. In h

ow many ways can the classes be chosen?

1 answer:

weeeeeb [17]3 years ago

6 0

Answer:

490,314

Step-by-step explanation:

This is a combinations problem. The formula is n!/(n-r)!xr!

This is 23!/(23-8)!x8!=

23!/15!x8!=

19,769,460,480/40,320=

490,314

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Solve 5x 2 - 7x + 2 = 0 by completing the square. What are the solutions?

Alexeev081 [22]

Answer:

$x=\frac{2}{5}$ or $x=1$

Step-by-step explanation:

The given quadratic equation is

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Divide through by 5.

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myrzilka [38]

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Write an equation for the line parallel to y= -2x+1 that contains (-2,5)

grin007 [14]

Answer:

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Step-by-step explanation:

Parallels line have the same slope, when an equation is in the form y= mx + b, m is the slope. In this problem slope = - 2

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y = mx + b

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