$\frac{ |a + x| }{2} - \frac{ |a - x| }{2} \\ \\ = \frac{ | - 2 - 6| }{2} - \frac{ | - 2 + 6| }{2} \\ \\ = \frac{ | - 8| }{2} - \frac{ |4| }{2} \\ \\ = \frac{8}{2} - \frac{4}{2} \\ \\ = 4 - 2 = 2$

5 0

2 years ago

Hello can you please help me posted picture of question

irina [24]

We are to form the combination of 6 objects taken 2 at a time. This can be expressed as 6C2

$6C2= \frac{6!}{2!*4!} \\ \\ 
= \frac{6*5}{2} \\ \\ 
=15$

This means, there can be 15 different combinations of 2 members that can sit in the front row.

So, the answer to this question is option A

6 0

3 years ago

Read 2 more answers

HELP ASAP!!!!!<br><br> 2x 2y=5 <br> y=1/4x

andrey2020 [161]

Answer:

X=2

Y=1/4*2

Y=1/2

Y=.5

Step-by-step explanation:

PROOF

2*2+2*.5=5

4+1=5

5=5

3 0

3 years ago