Answer:

Step-by-step explanation:
Given
Total = 900
Singing = 600
Dancing = 500
None = 125
Required
Determine the number of students that participate in both
Representing; Singing with S, Dancing with D, Both singing and dancing with B and None with N;
In Set Notation;

Substitute 900 for Total, 600 for S, 500 for D and 125 for N

Open Brackets

Collect Like Terms



Collect Like Terms


Multiply both sides by -1


Reorder

<em>Hence, the number of students that do not participate in both is 325</em>
0
The equation for slope is equal to
y - y
——-
x - x
so you’ll take
3-3 and divide it by 20-19
which would equal
0
—
1
and you know that 0 divided by anything is always going to equal 0
There would be 15 adults and 5 children in that group.
15 adults = $75
5 Children= $15
75+15= $90