Please answer ASAP.

In how many ways can groups of 8 singers be selected from 10 who came to an audition?

Question 2: $102.20 collected second day

Question 1: x-5

Step-by-step explanation:

Question 2:

We know that there are 15 members total.  The first day 8 members paid and the remaining paid on the second day.  To find the second day total just subtract first day from total members and that leaves the number who paid on second day.

15-8=7

So now we know 8 paid on 1st day and 7 on 2nd day.  To find the total paid on either day just multiply cost of dues by number who paid that day.

14.60*7=102.2

Question 1:

First let's make an equation with info from picture...

In first box there are 4 of the rectangles and the Key tells us they represent x.  We also have 12 white squares the Key tells us represents 1 each.  So first box is...

4x+12

Second box has 8 shaded squares that Key tells us represents -1 each.  So second box is...

-8

Our equation to solve with these values would be...

4x+12-8

4x-20

x-5